Added build step to .

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00JCIV00 2024-02-22 16:54:07 -05:00 committed by Tim Culverhouse
parent ca4346e35a
commit 845a3a6786
99 changed files with 94410 additions and 0 deletions

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zig-cache/
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var guideSections =[{"name":"","guides":[]}];

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var modules =[{"name":"main","file":0,"main":66,"table":{"builtin":1,"zigimg":3,"ziglyph":2,"main":0}},{"name":"builtin","file":0,"main":462,"table":{}},{"name":"ziglyph","file":0,"main":32522,"table":{}},{"name":"zigimg","file":0,"main":34283,"table":{"builtin":4}},{"name":"builtin","file":0,"main":34497,"table":{}}];

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var rootMod =0;

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var typeKinds =["Unanalyzed","Type","Void","Bool","NoReturn","Int","Float","Pointer","Array","Struct","ComptimeExpr","ComptimeFloat","ComptimeInt","Undefined","Null","Optional","ErrorUnion","InferredErrorUnion","ErrorSet","Enum","Union","Fn","Opaque","Frame","AnyFrame","Vector","EnumLiteral"];

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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-comment">/// Zig version. When writing code that supports multiple versions of Zig, prefer</span></span>
<span class="line" id="L3"><span class="tok-comment">/// feature detection (i.e. with `@hasDecl` or `@hasField`) over version checks.</span></span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> zig_version = std.SemanticVersion.parse(zig_version_string) <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> zig_version_string = <span class="tok-str">&quot;0.12.0-dev.2824+0b7af2563&quot;</span>;</span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> zig_backend = std.builtin.CompilerBackend.stage2_llvm;</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> output_mode = std.builtin.OutputMode.Exe;</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> link_mode = std.builtin.LinkMode.Static;</span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> is_test = <span class="tok-null">true</span>;</span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> single_threaded = <span class="tok-null">false</span>;</span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> abi = std.Target.Abi.gnu;</span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> cpu: std.Target.Cpu = .{</span>
<span class="line" id="L14"> .arch = .x86_64,</span>
<span class="line" id="L15"> .model = &amp;std.Target.x86.cpu.x86_64,</span>
<span class="line" id="L16"> .features = std.Target.x86.featureSet(&amp;[_]std.Target.x86.Feature{</span>
<span class="line" id="L17"> .@&quot;64bit&quot;,</span>
<span class="line" id="L18"> .adx,</span>
<span class="line" id="L19"> .aes,</span>
<span class="line" id="L20"> .avx,</span>
<span class="line" id="L21"> .avx2,</span>
<span class="line" id="L22"> .bmi,</span>
<span class="line" id="L23"> .bmi2,</span>
<span class="line" id="L24"> .clflushopt,</span>
<span class="line" id="L25"> .clwb,</span>
<span class="line" id="L26"> .cmov,</span>
<span class="line" id="L27"> .cx16,</span>
<span class="line" id="L28"> .cx8,</span>
<span class="line" id="L29"> .f16c,</span>
<span class="line" id="L30"> .fma,</span>
<span class="line" id="L31"> .fsgsbase,</span>
<span class="line" id="L32"> .fxsr,</span>
<span class="line" id="L33"> .gfni,</span>
<span class="line" id="L34"> .idivq_to_divl,</span>
<span class="line" id="L35"> .invpcid,</span>
<span class="line" id="L36"> .lzcnt,</span>
<span class="line" id="L37"> .macrofusion,</span>
<span class="line" id="L38"> .mmx,</span>
<span class="line" id="L39"> .movbe,</span>
<span class="line" id="L40"> .movdir64b,</span>
<span class="line" id="L41"> .movdiri,</span>
<span class="line" id="L42"> .nopl,</span>
<span class="line" id="L43"> .pclmul,</span>
<span class="line" id="L44"> .pconfig,</span>
<span class="line" id="L45"> .pku,</span>
<span class="line" id="L46"> .popcnt,</span>
<span class="line" id="L47"> .prfchw,</span>
<span class="line" id="L48"> .ptwrite,</span>
<span class="line" id="L49"> .rdpid,</span>
<span class="line" id="L50"> .rdrnd,</span>
<span class="line" id="L51"> .rdseed,</span>
<span class="line" id="L52"> .sahf,</span>
<span class="line" id="L53"> .sha,</span>
<span class="line" id="L54"> .shstk,</span>
<span class="line" id="L55"> .slow_3ops_lea,</span>
<span class="line" id="L56"> .slow_incdec,</span>
<span class="line" id="L57"> .sse,</span>
<span class="line" id="L58"> .sse2,</span>
<span class="line" id="L59"> .sse3,</span>
<span class="line" id="L60"> .sse4_1,</span>
<span class="line" id="L61"> .sse4_2,</span>
<span class="line" id="L62"> .ssse3,</span>
<span class="line" id="L63"> .vaes,</span>
<span class="line" id="L64"> .vpclmulqdq,</span>
<span class="line" id="L65"> .vzeroupper,</span>
<span class="line" id="L66"> .waitpkg,</span>
<span class="line" id="L67"> .x87,</span>
<span class="line" id="L68"> .xsave,</span>
<span class="line" id="L69"> .xsavec,</span>
<span class="line" id="L70"> .xsaveopt,</span>
<span class="line" id="L71"> .xsaves,</span>
<span class="line" id="L72"> }),</span>
<span class="line" id="L73">};</span>
<span class="line" id="L74"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> os = std.Target.Os{</span>
<span class="line" id="L75"> .tag = .linux,</span>
<span class="line" id="L76"> .version_range = .{ .linux = .{</span>
<span class="line" id="L77"> .range = .{</span>
<span class="line" id="L78"> .min = .{</span>
<span class="line" id="L79"> .major = <span class="tok-number">5</span>,</span>
<span class="line" id="L80"> .minor = <span class="tok-number">15</span>,</span>
<span class="line" id="L81"> .patch = <span class="tok-number">0</span>,</span>
<span class="line" id="L82"> },</span>
<span class="line" id="L83"> .max = .{</span>
<span class="line" id="L84"> .major = <span class="tok-number">5</span>,</span>
<span class="line" id="L85"> .minor = <span class="tok-number">15</span>,</span>
<span class="line" id="L86"> .patch = <span class="tok-number">0</span>,</span>
<span class="line" id="L87"> },</span>
<span class="line" id="L88"> },</span>
<span class="line" id="L89"> .glibc = .{</span>
<span class="line" id="L90"> .major = <span class="tok-number">2</span>,</span>
<span class="line" id="L91"> .minor = <span class="tok-number">35</span>,</span>
<span class="line" id="L92"> .patch = <span class="tok-number">0</span>,</span>
<span class="line" id="L93"> },</span>
<span class="line" id="L94"> }},</span>
<span class="line" id="L95">};</span>
<span class="line" id="L96"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> target: std.Target = .{</span>
<span class="line" id="L97"> .cpu = cpu,</span>
<span class="line" id="L98"> .os = os,</span>
<span class="line" id="L99"> .abi = abi,</span>
<span class="line" id="L100"> .ofmt = object_format,</span>
<span class="line" id="L101"> .dynamic_linker = std.Target.DynamicLinker.init(<span class="tok-str">&quot;/lib64/ld-linux-x86-64.so.2&quot;</span>),</span>
<span class="line" id="L102">};</span>
<span class="line" id="L103"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> object_format = std.Target.ObjectFormat.elf;</span>
<span class="line" id="L104"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> mode = std.builtin.OptimizeMode.Debug;</span>
<span class="line" id="L105"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> link_libc = <span class="tok-null">false</span>;</span>
<span class="line" id="L106"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> link_libcpp = <span class="tok-null">false</span>;</span>
<span class="line" id="L107"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> have_error_return_tracing = <span class="tok-null">true</span>;</span>
<span class="line" id="L108"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> valgrind_support = <span class="tok-null">true</span>;</span>
<span class="line" id="L109"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> sanitize_thread = <span class="tok-null">false</span>;</span>
<span class="line" id="L110"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> position_independent_code = <span class="tok-null">false</span>;</span>
<span class="line" id="L111"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> position_independent_executable = <span class="tok-null">false</span>;</span>
<span class="line" id="L112"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> strip_debug_info = <span class="tok-null">false</span>;</span>
<span class="line" id="L113"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> code_model = std.builtin.CodeModel.default;</span>
<span class="line" id="L114"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> omit_frame_pointer = <span class="tok-null">false</span>;</span>
<span class="line" id="L115"><span class="tok-kw">pub</span> <span class="tok-kw">var</span> test_functions: []<span class="tok-kw">const</span> std.builtin.TestFn = <span class="tok-null">undefined</span>; <span class="tok-comment">// overwritten later</span>
</span>
<span class="line" id="L116"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Image.zig&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3">char: Character = .{},</span>
<span class="line" id="L4">style: Style = .{},</span>
<span class="line" id="L5">link: Hyperlink = .{},</span>
<span class="line" id="L6">image: ?Image.Placement = <span class="tok-null">null</span>,</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-comment">/// Segment is a contiguous run of text that has a constant style</span></span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Segment = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L10"> text: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L11"> style: Style = .{},</span>
<span class="line" id="L12"> link: Hyperlink = .{},</span>
<span class="line" id="L13">};</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Character = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L16"> grapheme: []<span class="tok-kw">const</span> <span class="tok-type">u8</span> = <span class="tok-str">&quot; &quot;</span>,</span>
<span class="line" id="L17"> <span class="tok-comment">/// width should only be provided when the application is sure the terminal</span></span>
<span class="line" id="L18"> <span class="tok-comment">/// will measure the same width. This can be ensure by using the gwidth method</span></span>
<span class="line" id="L19"> <span class="tok-comment">/// included in libvaxis. If width is 0, libvaxis will measure the glyph at</span></span>
<span class="line" id="L20"> <span class="tok-comment">/// render time</span></span>
<span class="line" id="L21"> width: <span class="tok-type">usize</span> = <span class="tok-number">1</span>,</span>
<span class="line" id="L22">};</span>
<span class="line" id="L23"></span>
<span class="line" id="L24"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Hyperlink = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L25"> uri: []<span class="tok-kw">const</span> <span class="tok-type">u8</span> = <span class="tok-str">&quot;&quot;</span>,</span>
<span class="line" id="L26"> <span class="tok-comment">/// ie &quot;id=app-1234&quot;</span></span>
<span class="line" id="L27"> params: []<span class="tok-kw">const</span> <span class="tok-type">u8</span> = <span class="tok-str">&quot;&quot;</span>,</span>
<span class="line" id="L28">};</span>
<span class="line" id="L29"></span>
<span class="line" id="L30"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Style = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L31"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Underline = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L32"> off,</span>
<span class="line" id="L33"> single,</span>
<span class="line" id="L34"> double,</span>
<span class="line" id="L35"> curly,</span>
<span class="line" id="L36"> dotted,</span>
<span class="line" id="L37"> dashed,</span>
<span class="line" id="L38"> };</span>
<span class="line" id="L39"></span>
<span class="line" id="L40"> fg: Color = .default,</span>
<span class="line" id="L41"> bg: Color = .default,</span>
<span class="line" id="L42"> ul: Color = .default,</span>
<span class="line" id="L43"> ul_style: Underline = .off,</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"> bold: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L46"> dim: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L47"> italic: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L48"> blink: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L49"> reverse: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L50"> invisible: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L51"> strikethrough: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L52">};</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Color = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L55"> default,</span>
<span class="line" id="L56"> index: <span class="tok-type">u8</span>,</span>
<span class="line" id="L57"> rgb: [<span class="tok-number">3</span>]<span class="tok-type">u8</span>,</span>
<span class="line" id="L58">};</span>
<span class="line" id="L59"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> testing = std.testing;</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> GraphemeCache = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-comment">/// the underlying storage for graphemes. Right now 8kb</span></span>
<span class="line" id="L7">buf: [<span class="tok-number">1024</span> * <span class="tok-number">8</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-comment">// the start index of the next grapheme</span>
</span>
<span class="line" id="L10">idx: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-comment">/// put a slice of bytes in the cache as a grapheme</span></span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">put</span>(self: *GraphemeCache, bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) []<span class="tok-type">u8</span> {</span>
<span class="line" id="L14"> <span class="tok-comment">// reset the idx to 0 if we would overflow</span>
</span>
<span class="line" id="L15"> <span class="tok-kw">if</span> (self.idx + bytes.len &gt; self.buf.len) self.idx = <span class="tok-number">0</span>;</span>
<span class="line" id="L16"> <span class="tok-kw">defer</span> self.idx += bytes.len;</span>
<span class="line" id="L17"> <span class="tok-comment">// copy the grapheme to our storage</span>
</span>
<span class="line" id="L18"> <span class="tok-builtin">@memcpy</span>(self.buf[self.idx .. self.idx + bytes.len], bytes);</span>
<span class="line" id="L19"> <span class="tok-comment">// return the slice</span>
</span>
<span class="line" id="L20"> <span class="tok-kw">return</span> self.buf[self.idx .. self.idx + bytes.len];</span>
<span class="line" id="L21">}</span>
<span class="line" id="L22"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> fmt = std.fmt;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> math = std.math;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> testing = std.testing;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> base64 = std.base64.standard.Encoder;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> zigimg = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;zigimg&quot;</span>);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">const</span> Window = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Window.zig&quot;</span>);</span>
<span class="line" id="L9"></span>
<span class="line" id="L10"><span class="tok-kw">const</span> log = std.log.scoped(.image);</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> transmit_opener = <span class="tok-str">&quot;\x1b_Gf=32,i={d},s={d},v={d},m={d};&quot;</span>;</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Source = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L17"> path: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L18"> mem: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L19">};</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Placement = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L22"> img_id: <span class="tok-type">u32</span>,</span>
<span class="line" id="L23"> z_index: <span class="tok-type">i32</span>,</span>
<span class="line" id="L24"> size: ?CellSize = <span class="tok-null">null</span>,</span>
<span class="line" id="L25">};</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CellSize = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L28"> rows: <span class="tok-type">usize</span>,</span>
<span class="line" id="L29"> cols: <span class="tok-type">usize</span>,</span>
<span class="line" id="L30">};</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"><span class="tok-comment">/// unique identifier for this image. This will be managed by the screen.</span></span>
<span class="line" id="L33">id: <span class="tok-type">u32</span>,</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"><span class="tok-comment">// width in pixels</span>
</span>
<span class="line" id="L36">width: <span class="tok-type">usize</span>,</span>
<span class="line" id="L37"><span class="tok-comment">// height in pixels</span>
</span>
<span class="line" id="L38">height: <span class="tok-type">usize</span>,</span>
<span class="line" id="L39"></span>
<span class="line" id="L40"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">draw</span>(self: Image, win: Window, scale: <span class="tok-type">bool</span>, z_index: <span class="tok-type">i32</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L41"> <span class="tok-kw">const</span> p = Placement{</span>
<span class="line" id="L42"> .img_id = self.id,</span>
<span class="line" id="L43"> .z_index = z_index,</span>
<span class="line" id="L44"> .size = sz: {</span>
<span class="line" id="L45"> <span class="tok-kw">if</span> (!scale) <span class="tok-kw">break</span> :sz <span class="tok-null">null</span>;</span>
<span class="line" id="L46"> <span class="tok-kw">break</span> :sz CellSize{</span>
<span class="line" id="L47"> .rows = win.height,</span>
<span class="line" id="L48"> .cols = win.width,</span>
<span class="line" id="L49"> };</span>
<span class="line" id="L50"> },</span>
<span class="line" id="L51"> };</span>
<span class="line" id="L52"> win.writeCell(<span class="tok-number">0</span>, <span class="tok-number">0</span>, .{ .image = p });</span>
<span class="line" id="L53">}</span>
<span class="line" id="L54"></span>
<span class="line" id="L55"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">cellSize</span>(self: Image, win: Window) !CellSize {</span>
<span class="line" id="L56"> <span class="tok-comment">// cell geometry</span>
</span>
<span class="line" id="L57"> <span class="tok-kw">const</span> x_pix = win.screen.width_pix;</span>
<span class="line" id="L58"> <span class="tok-kw">const</span> y_pix = win.screen.height_pix;</span>
<span class="line" id="L59"> <span class="tok-kw">const</span> w = win.screen.width;</span>
<span class="line" id="L60"> <span class="tok-kw">const</span> h = win.screen.height;</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"> <span class="tok-kw">const</span> pix_per_col = <span class="tok-kw">try</span> std.math.divCeil(<span class="tok-type">usize</span>, x_pix, w);</span>
<span class="line" id="L63"> <span class="tok-kw">const</span> pix_per_row = <span class="tok-kw">try</span> std.math.divCeil(<span class="tok-type">usize</span>, y_pix, h);</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> <span class="tok-kw">const</span> cell_width = std.math.divCeil(<span class="tok-type">usize</span>, self.width, pix_per_col) <span class="tok-kw">catch</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L66"> <span class="tok-kw">const</span> cell_height = std.math.divCeil(<span class="tok-type">usize</span>, self.height, pix_per_row) <span class="tok-kw">catch</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L67"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L68"> .rows = cell_height,</span>
<span class="line" id="L69"> .cols = cell_width,</span>
<span class="line" id="L70"> };</span>
<span class="line" id="L71">}</span>
<span class="line" id="L72"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> assert = std.debug.assert;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> Style = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>).Style;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Cell = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Shape = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Mouse.zig&quot;</span>).Shape;</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> log = std.log.scoped(.internal_screen);</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">const</span> InternalScreen = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> InternalCell = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L12"> char: std.ArrayList(<span class="tok-type">u8</span>) = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L13"> style: Style = .{},</span>
<span class="line" id="L14"> uri: std.ArrayList(<span class="tok-type">u8</span>) = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L15"> uri_id: std.ArrayList(<span class="tok-type">u8</span>) = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L16"> <span class="tok-comment">// if we got skipped because of a wide character</span>
</span>
<span class="line" id="L17"> skipped: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eql</span>(self: InternalCell, cell: Cell) <span class="tok-type">bool</span> {</span>
<span class="line" id="L20"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, self.char.items, cell.char.grapheme) <span class="tok-kw">and</span></span>
<span class="line" id="L21"> std.meta.eql(self.style, cell.style) <span class="tok-kw">and</span></span>
<span class="line" id="L22"> std.mem.eql(<span class="tok-type">u8</span>, self.uri.items, cell.link.uri) <span class="tok-kw">and</span></span>
<span class="line" id="L23"> std.mem.eql(<span class="tok-type">u8</span>, self.uri_id.items, cell.link.params);</span>
<span class="line" id="L24"> }</span>
<span class="line" id="L25">};</span>
<span class="line" id="L26"></span>
<span class="line" id="L27">width: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L28">height: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L29"></span>
<span class="line" id="L30">buf: []InternalCell = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L31"></span>
<span class="line" id="L32">cursor_row: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L33">cursor_col: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L34">cursor_vis: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L35"></span>
<span class="line" id="L36">mouse_shape: Shape = .default,</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"><span class="tok-comment">/// sets each cell to the default cell</span></span>
<span class="line" id="L39"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(alloc: std.mem.Allocator, w: <span class="tok-type">usize</span>, h: <span class="tok-type">usize</span>) !InternalScreen {</span>
<span class="line" id="L40"> <span class="tok-kw">var</span> screen = InternalScreen{</span>
<span class="line" id="L41"> .buf = <span class="tok-kw">try</span> alloc.alloc(InternalCell, w * h),</span>
<span class="line" id="L42"> };</span>
<span class="line" id="L43"> <span class="tok-kw">for</span> (screen.buf, <span class="tok-number">0</span>..) |_, i| {</span>
<span class="line" id="L44"> screen.buf[i] = .{</span>
<span class="line" id="L45"> .char = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u8</span>).initCapacity(alloc, <span class="tok-number">1</span>),</span>
<span class="line" id="L46"> .uri = std.ArrayList(<span class="tok-type">u8</span>).init(alloc),</span>
<span class="line" id="L47"> .uri_id = std.ArrayList(<span class="tok-type">u8</span>).init(alloc),</span>
<span class="line" id="L48"> };</span>
<span class="line" id="L49"> }</span>
<span class="line" id="L50"> screen.width = w;</span>
<span class="line" id="L51"> screen.height = h;</span>
<span class="line" id="L52"> <span class="tok-kw">return</span> screen;</span>
<span class="line" id="L53">}</span>
<span class="line" id="L54"></span>
<span class="line" id="L55"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *InternalScreen, alloc: std.mem.Allocator) <span class="tok-type">void</span> {</span>
<span class="line" id="L56"> <span class="tok-kw">for</span> (self.buf, <span class="tok-number">0</span>..) |_, i| {</span>
<span class="line" id="L57"> self.buf[i].char.deinit();</span>
<span class="line" id="L58"> self.buf[i].uri.deinit();</span>
<span class="line" id="L59"> self.buf[i].uri_id.deinit();</span>
<span class="line" id="L60"> }</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"> alloc.free(self.buf);</span>
<span class="line" id="L63">}</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"><span class="tok-comment">/// writes a cell to a location. 0 indexed</span></span>
<span class="line" id="L66"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeCell</span>(</span>
<span class="line" id="L67"> self: *InternalScreen,</span>
<span class="line" id="L68"> col: <span class="tok-type">usize</span>,</span>
<span class="line" id="L69"> row: <span class="tok-type">usize</span>,</span>
<span class="line" id="L70"> cell: Cell,</span>
<span class="line" id="L71">) <span class="tok-type">void</span> {</span>
<span class="line" id="L72"> <span class="tok-kw">if</span> (self.width &lt; col) {</span>
<span class="line" id="L73"> <span class="tok-comment">// column out of bounds</span>
</span>
<span class="line" id="L74"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L75"> }</span>
<span class="line" id="L76"> <span class="tok-kw">if</span> (self.height &lt; row) {</span>
<span class="line" id="L77"> <span class="tok-comment">// height out of bounds</span>
</span>
<span class="line" id="L78"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L79"> }</span>
<span class="line" id="L80"> <span class="tok-kw">const</span> i = (row * self.width) + col;</span>
<span class="line" id="L81"> assert(i &lt; self.buf.len);</span>
<span class="line" id="L82"> self.buf[i].char.clearRetainingCapacity();</span>
<span class="line" id="L83"> self.buf[i].char.appendSlice(cell.char.grapheme) <span class="tok-kw">catch</span> {</span>
<span class="line" id="L84"> log.warn(<span class="tok-str">&quot;couldn't write grapheme&quot;</span>, .{});</span>
<span class="line" id="L85"> };</span>
<span class="line" id="L86"> self.buf[i].uri.clearRetainingCapacity();</span>
<span class="line" id="L87"> self.buf[i].uri.appendSlice(cell.link.uri) <span class="tok-kw">catch</span> {</span>
<span class="line" id="L88"> log.warn(<span class="tok-str">&quot;couldn't write uri&quot;</span>, .{});</span>
<span class="line" id="L89"> };</span>
<span class="line" id="L90"> self.buf[i].uri.clearRetainingCapacity();</span>
<span class="line" id="L91"> self.buf[i].uri_id.appendSlice(cell.link.params) <span class="tok-kw">catch</span> {</span>
<span class="line" id="L92"> log.warn(<span class="tok-str">&quot;couldn't write uri_id&quot;</span>, .{});</span>
<span class="line" id="L93"> };</span>
<span class="line" id="L94"> self.buf[i].style = cell.style;</span>
<span class="line" id="L95">}</span>
<span class="line" id="L96"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> testing = std.testing;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> ziglyph = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> Key = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Modifiers = <span class="tok-kw">packed</span> <span class="tok-kw">struct</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L8"> shift: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L9"> alt: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L10"> ctrl: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L11"> super: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L12"> hyper: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L13"> meta: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L14"> caps_lock: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L15"> num_lock: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L16">};</span>
<span class="line" id="L17"></span>
<span class="line" id="L18"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> KittyFlags = <span class="tok-kw">packed</span> <span class="tok-kw">struct</span>(<span class="tok-type">u5</span>) {</span>
<span class="line" id="L19"> disambiguate: <span class="tok-type">bool</span> = <span class="tok-null">true</span>,</span>
<span class="line" id="L20"> report_events: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L21"> report_alternate_keys: <span class="tok-type">bool</span> = <span class="tok-null">true</span>,</span>
<span class="line" id="L22"> report_all_as_ctl_seqs: <span class="tok-type">bool</span> = <span class="tok-null">true</span>,</span>
<span class="line" id="L23"> report_text: <span class="tok-type">bool</span> = <span class="tok-null">true</span>,</span>
<span class="line" id="L24">};</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"><span class="tok-comment">/// the unicode codepoint of the key event.</span></span>
<span class="line" id="L27">codepoint: <span class="tok-type">u21</span>,</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"><span class="tok-comment">/// the text generated from the key event. The underlying slice has a limited</span></span>
<span class="line" id="L30"><span class="tok-comment">/// lifetime. Vaxis maintains an internal ring buffer to temporarily store text.</span></span>
<span class="line" id="L31"><span class="tok-comment">/// If the application needs these values longer than the lifetime of the event</span></span>
<span class="line" id="L32"><span class="tok-comment">/// it must copy the data.</span></span>
<span class="line" id="L33">text: ?[]<span class="tok-kw">const</span> <span class="tok-type">u8</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"><span class="tok-comment">/// the shifted codepoint of this key event. This will only be present if the</span></span>
<span class="line" id="L36"><span class="tok-comment">/// Shift modifier was used to generate the event</span></span>
<span class="line" id="L37">shifted_codepoint: ?<span class="tok-type">u21</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"><span class="tok-comment">/// the key that would have been pressed on a standard keyboard layout. This is</span></span>
<span class="line" id="L40"><span class="tok-comment">/// useful for shortcut matching</span></span>
<span class="line" id="L41">base_layout_codepoint: ?<span class="tok-type">u21</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L42"></span>
<span class="line" id="L43">mods: Modifiers = .{},</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"><span class="tok-comment">// matches follows a loose matching algorithm for key matches.</span>
</span>
<span class="line" id="L46"><span class="tok-comment">// 1. If the codepoint and modifiers are exact matches</span>
</span>
<span class="line" id="L47"><span class="tok-comment">// 2. If the utf8 encoding of the codepoint matches the text</span>
</span>
<span class="line" id="L48"><span class="tok-comment">// 3. If there is a shifted codepoint and it matches after removing the shift</span>
</span>
<span class="line" id="L49"><span class="tok-comment">// modifier from self</span>
</span>
<span class="line" id="L50"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">matches</span>(self: Key, cp: <span class="tok-type">u21</span>, mods: Modifiers) <span class="tok-type">bool</span> {</span>
<span class="line" id="L51"> <span class="tok-comment">// rule 1</span>
</span>
<span class="line" id="L52"> <span class="tok-kw">if</span> (self.matchExact(cp, mods)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-comment">// rule 2</span>
</span>
<span class="line" id="L55"> <span class="tok-kw">if</span> (self.matchText(cp, mods)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L56"></span>
<span class="line" id="L57"> <span class="tok-comment">// rule 3</span>
</span>
<span class="line" id="L58"> <span class="tok-kw">if</span> (self.matchShiftedCodepoint(cp, mods)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L59"></span>
<span class="line" id="L60"> <span class="tok-comment">// rule 4</span>
</span>
<span class="line" id="L61"> <span class="tok-kw">if</span> (self.matchShiftedCodepoint(cp, mods)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L62"></span>
<span class="line" id="L63"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L64">}</span>
<span class="line" id="L65"></span>
<span class="line" id="L66"><span class="tok-comment">// matches base layout codes, useful for shortcut matching when an alternate key</span>
</span>
<span class="line" id="L67"><span class="tok-comment">// layout is used</span>
</span>
<span class="line" id="L68"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">matchShortcut</span>(self: Key, cp: <span class="tok-type">u21</span>, mods: Modifiers) <span class="tok-type">bool</span> {</span>
<span class="line" id="L69"> <span class="tok-kw">if</span> (self.base_layout_codepoint == <span class="tok-null">null</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L70"> <span class="tok-kw">return</span> cp == self.base_layout_codepoint.? <span class="tok-kw">and</span> std.meta.eql(self.mods, mods);</span>
<span class="line" id="L71">}</span>
<span class="line" id="L72"></span>
<span class="line" id="L73"><span class="tok-comment">// matches keys that aren't upper case versions when shifted. For example, shift</span>
</span>
<span class="line" id="L74"><span class="tok-comment">// + semicolon produces a colon. The key can be matched against shift +</span>
</span>
<span class="line" id="L75"><span class="tok-comment">// semicolon or just colon...or shift + ctrl + ; or just ctrl + :</span>
</span>
<span class="line" id="L76"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">matchShiftedCodepoint</span>(self: Key, cp: <span class="tok-type">u21</span>, mods: Modifiers) <span class="tok-type">bool</span> {</span>
<span class="line" id="L77"> <span class="tok-kw">if</span> (self.shifted_codepoint == <span class="tok-null">null</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L78"> <span class="tok-kw">if</span> (!self.mods.shift) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L79"> <span class="tok-kw">var</span> self_mods = self.mods;</span>
<span class="line" id="L80"> self_mods.shift = <span class="tok-null">false</span>;</span>
<span class="line" id="L81"> <span class="tok-kw">return</span> cp == self.shifted_codepoint.? <span class="tok-kw">and</span> std.meta.eql(self_mods, mods);</span>
<span class="line" id="L82">}</span>
<span class="line" id="L83"></span>
<span class="line" id="L84"><span class="tok-comment">// matches when the utf8 encoding of the codepoint and relevant mods matches the</span>
</span>
<span class="line" id="L85"><span class="tok-comment">// text of the key. This function will consume Shift and Caps Lock when matching</span>
</span>
<span class="line" id="L86"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">matchText</span>(self: Key, cp: <span class="tok-type">u21</span>, mods: Modifiers) <span class="tok-type">bool</span> {</span>
<span class="line" id="L87"> <span class="tok-comment">// return early if we have no text</span>
</span>
<span class="line" id="L88"> <span class="tok-kw">if</span> (self.text == <span class="tok-null">null</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> <span class="tok-kw">var</span> self_mods = self.mods;</span>
<span class="line" id="L91"> <span class="tok-kw">var</span> arg_mods = mods;</span>
<span class="line" id="L92"> <span class="tok-kw">var</span> code = cp;</span>
<span class="line" id="L93"> <span class="tok-comment">// if the passed codepoint is upper, we consume all shift and caps mods for</span>
</span>
<span class="line" id="L94"> <span class="tok-comment">// checking</span>
</span>
<span class="line" id="L95"> <span class="tok-kw">if</span> (ziglyph.isUpper(cp)) {</span>
<span class="line" id="L96"> <span class="tok-comment">// consume mods</span>
</span>
<span class="line" id="L97"> self_mods.shift = <span class="tok-null">false</span>;</span>
<span class="line" id="L98"> self_mods.caps_lock = <span class="tok-null">false</span>;</span>
<span class="line" id="L99"> arg_mods.shift = <span class="tok-null">false</span>;</span>
<span class="line" id="L100"> arg_mods.caps_lock = <span class="tok-null">false</span>;</span>
<span class="line" id="L101"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (mods.shift <span class="tok-kw">or</span> mods.caps_lock) {</span>
<span class="line" id="L102"> <span class="tok-comment">// uppercase the cp and consume all mods</span>
</span>
<span class="line" id="L103"> code = ziglyph.toUpper(cp);</span>
<span class="line" id="L104"> self_mods.shift = <span class="tok-null">false</span>;</span>
<span class="line" id="L105"> self_mods.caps_lock = <span class="tok-null">false</span>;</span>
<span class="line" id="L106"> arg_mods.shift = <span class="tok-null">false</span>;</span>
<span class="line" id="L107"> arg_mods.caps_lock = <span class="tok-null">false</span>;</span>
<span class="line" id="L108"> }</span>
<span class="line" id="L109"></span>
<span class="line" id="L110"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L111"> <span class="tok-kw">const</span> n = std.unicode.utf8Encode(cp, buf[<span class="tok-number">0</span>..]) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L112"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, self.text.?, buf[<span class="tok-number">0</span>..n]) <span class="tok-kw">and</span> std.meta.eql(self_mods, arg_mods);</span>
<span class="line" id="L113">}</span>
<span class="line" id="L114"></span>
<span class="line" id="L115"><span class="tok-comment">// The key must exactly match the codepoint and modifiers</span>
</span>
<span class="line" id="L116"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">matchExact</span>(self: Key, cp: <span class="tok-type">u21</span>, mods: Modifiers) <span class="tok-type">bool</span> {</span>
<span class="line" id="L117"> <span class="tok-kw">return</span> self.codepoint == cp <span class="tok-kw">and</span> std.meta.eql(self.mods, mods);</span>
<span class="line" id="L118">}</span>
<span class="line" id="L119"></span>
<span class="line" id="L120"><span class="tok-comment">// a few special keys that we encode as their actual ascii value</span>
</span>
<span class="line" id="L121"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> enter: <span class="tok-type">u21</span> = <span class="tok-number">0x0D</span>;</span>
<span class="line" id="L122"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> tab: <span class="tok-type">u21</span> = <span class="tok-number">0x09</span>;</span>
<span class="line" id="L123"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> escape: <span class="tok-type">u21</span> = <span class="tok-number">0x1B</span>;</span>
<span class="line" id="L124"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> space: <span class="tok-type">u21</span> = <span class="tok-number">0x20</span>;</span>
<span class="line" id="L125"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> backspace: <span class="tok-type">u21</span> = <span class="tok-number">0x7F</span>;</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"><span class="tok-comment">// multicodepoint is a key which generated text but cannot be expressed as a</span>
</span>
<span class="line" id="L128"><span class="tok-comment">// single codepoint. The value is the maximum unicode codepoint + 1</span>
</span>
<span class="line" id="L129"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> multicodepoint: <span class="tok-type">u21</span> = <span class="tok-number">1_114_112</span> + <span class="tok-number">1</span>;</span>
<span class="line" id="L130"></span>
<span class="line" id="L131"><span class="tok-comment">// kitty encodes these keys directly in the private use area. We reuse those</span>
</span>
<span class="line" id="L132"><span class="tok-comment">// mappings</span>
</span>
<span class="line" id="L133"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> insert: <span class="tok-type">u21</span> = <span class="tok-number">57348</span>;</span>
<span class="line" id="L134"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> delete: <span class="tok-type">u21</span> = <span class="tok-number">57349</span>;</span>
<span class="line" id="L135"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left: <span class="tok-type">u21</span> = <span class="tok-number">57350</span>;</span>
<span class="line" id="L136"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right: <span class="tok-type">u21</span> = <span class="tok-number">57351</span>;</span>
<span class="line" id="L137"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> up: <span class="tok-type">u21</span> = <span class="tok-number">57352</span>;</span>
<span class="line" id="L138"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> down: <span class="tok-type">u21</span> = <span class="tok-number">57353</span>;</span>
<span class="line" id="L139"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> page_up: <span class="tok-type">u21</span> = <span class="tok-number">57354</span>;</span>
<span class="line" id="L140"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> page_down: <span class="tok-type">u21</span> = <span class="tok-number">57355</span>;</span>
<span class="line" id="L141"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> home: <span class="tok-type">u21</span> = <span class="tok-number">57356</span>;</span>
<span class="line" id="L142"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> end: <span class="tok-type">u21</span> = <span class="tok-number">57357</span>;</span>
<span class="line" id="L143"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> caps_lock: <span class="tok-type">u21</span> = <span class="tok-number">57358</span>;</span>
<span class="line" id="L144"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> scroll_lock: <span class="tok-type">u21</span> = <span class="tok-number">57359</span>;</span>
<span class="line" id="L145"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> num_lock: <span class="tok-type">u21</span> = <span class="tok-number">57360</span>;</span>
<span class="line" id="L146"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> print_screen: <span class="tok-type">u21</span> = <span class="tok-number">57361</span>;</span>
<span class="line" id="L147"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> pause: <span class="tok-type">u21</span> = <span class="tok-number">57362</span>;</span>
<span class="line" id="L148"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> menu: <span class="tok-type">u21</span> = <span class="tok-number">57363</span>;</span>
<span class="line" id="L149"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f1: <span class="tok-type">u21</span> = <span class="tok-number">57364</span>;</span>
<span class="line" id="L150"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f2: <span class="tok-type">u21</span> = <span class="tok-number">57365</span>;</span>
<span class="line" id="L151"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f3: <span class="tok-type">u21</span> = <span class="tok-number">57366</span>;</span>
<span class="line" id="L152"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f4: <span class="tok-type">u21</span> = <span class="tok-number">57367</span>;</span>
<span class="line" id="L153"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f5: <span class="tok-type">u21</span> = <span class="tok-number">57368</span>;</span>
<span class="line" id="L154"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f6: <span class="tok-type">u21</span> = <span class="tok-number">57369</span>;</span>
<span class="line" id="L155"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f7: <span class="tok-type">u21</span> = <span class="tok-number">57370</span>;</span>
<span class="line" id="L156"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f8: <span class="tok-type">u21</span> = <span class="tok-number">57371</span>;</span>
<span class="line" id="L157"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f9: <span class="tok-type">u21</span> = <span class="tok-number">57372</span>;</span>
<span class="line" id="L158"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f10: <span class="tok-type">u21</span> = <span class="tok-number">57373</span>;</span>
<span class="line" id="L159"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f11: <span class="tok-type">u21</span> = <span class="tok-number">57374</span>;</span>
<span class="line" id="L160"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f12: <span class="tok-type">u21</span> = <span class="tok-number">57375</span>;</span>
<span class="line" id="L161"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f13: <span class="tok-type">u21</span> = <span class="tok-number">57376</span>;</span>
<span class="line" id="L162"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f14: <span class="tok-type">u21</span> = <span class="tok-number">57377</span>;</span>
<span class="line" id="L163"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f15: <span class="tok-type">u21</span> = <span class="tok-number">57378</span>;</span>
<span class="line" id="L164"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> @&quot;f16&quot;: <span class="tok-type">u21</span> = <span class="tok-number">57379</span>;</span>
<span class="line" id="L165"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f17: <span class="tok-type">u21</span> = <span class="tok-number">57380</span>;</span>
<span class="line" id="L166"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f18: <span class="tok-type">u21</span> = <span class="tok-number">57381</span>;</span>
<span class="line" id="L167"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f19: <span class="tok-type">u21</span> = <span class="tok-number">57382</span>;</span>
<span class="line" id="L168"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f20: <span class="tok-type">u21</span> = <span class="tok-number">57383</span>;</span>
<span class="line" id="L169"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f21: <span class="tok-type">u21</span> = <span class="tok-number">57384</span>;</span>
<span class="line" id="L170"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f22: <span class="tok-type">u21</span> = <span class="tok-number">57385</span>;</span>
<span class="line" id="L171"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f23: <span class="tok-type">u21</span> = <span class="tok-number">57386</span>;</span>
<span class="line" id="L172"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f24: <span class="tok-type">u21</span> = <span class="tok-number">57387</span>;</span>
<span class="line" id="L173"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f25: <span class="tok-type">u21</span> = <span class="tok-number">57388</span>;</span>
<span class="line" id="L174"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f26: <span class="tok-type">u21</span> = <span class="tok-number">57389</span>;</span>
<span class="line" id="L175"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f27: <span class="tok-type">u21</span> = <span class="tok-number">57390</span>;</span>
<span class="line" id="L176"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f28: <span class="tok-type">u21</span> = <span class="tok-number">57391</span>;</span>
<span class="line" id="L177"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f29: <span class="tok-type">u21</span> = <span class="tok-number">57392</span>;</span>
<span class="line" id="L178"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f30: <span class="tok-type">u21</span> = <span class="tok-number">57393</span>;</span>
<span class="line" id="L179"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f31: <span class="tok-type">u21</span> = <span class="tok-number">57394</span>;</span>
<span class="line" id="L180"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> @&quot;f32&quot;: <span class="tok-type">u21</span> = <span class="tok-number">57395</span>;</span>
<span class="line" id="L181"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f33: <span class="tok-type">u21</span> = <span class="tok-number">57396</span>;</span>
<span class="line" id="L182"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f34: <span class="tok-type">u21</span> = <span class="tok-number">57397</span>;</span>
<span class="line" id="L183"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> f35: <span class="tok-type">u21</span> = <span class="tok-number">57398</span>;</span>
<span class="line" id="L184"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_0: <span class="tok-type">u21</span> = <span class="tok-number">57399</span>;</span>
<span class="line" id="L185"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_1: <span class="tok-type">u21</span> = <span class="tok-number">57400</span>;</span>
<span class="line" id="L186"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_2: <span class="tok-type">u21</span> = <span class="tok-number">57401</span>;</span>
<span class="line" id="L187"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_3: <span class="tok-type">u21</span> = <span class="tok-number">57402</span>;</span>
<span class="line" id="L188"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_4: <span class="tok-type">u21</span> = <span class="tok-number">57403</span>;</span>
<span class="line" id="L189"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_5: <span class="tok-type">u21</span> = <span class="tok-number">57404</span>;</span>
<span class="line" id="L190"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_6: <span class="tok-type">u21</span> = <span class="tok-number">57405</span>;</span>
<span class="line" id="L191"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_7: <span class="tok-type">u21</span> = <span class="tok-number">57406</span>;</span>
<span class="line" id="L192"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_8: <span class="tok-type">u21</span> = <span class="tok-number">57407</span>;</span>
<span class="line" id="L193"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_9: <span class="tok-type">u21</span> = <span class="tok-number">57408</span>;</span>
<span class="line" id="L194"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_decimal: <span class="tok-type">u21</span> = <span class="tok-number">57409</span>;</span>
<span class="line" id="L195"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_divide: <span class="tok-type">u21</span> = <span class="tok-number">57410</span>;</span>
<span class="line" id="L196"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_multiply: <span class="tok-type">u21</span> = <span class="tok-number">57411</span>;</span>
<span class="line" id="L197"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_subtract: <span class="tok-type">u21</span> = <span class="tok-number">57412</span>;</span>
<span class="line" id="L198"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_add: <span class="tok-type">u21</span> = <span class="tok-number">57413</span>;</span>
<span class="line" id="L199"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_enter: <span class="tok-type">u21</span> = <span class="tok-number">57414</span>;</span>
<span class="line" id="L200"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_equal: <span class="tok-type">u21</span> = <span class="tok-number">57415</span>;</span>
<span class="line" id="L201"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_separator: <span class="tok-type">u21</span> = <span class="tok-number">57416</span>;</span>
<span class="line" id="L202"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_left: <span class="tok-type">u21</span> = <span class="tok-number">57417</span>;</span>
<span class="line" id="L203"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_right: <span class="tok-type">u21</span> = <span class="tok-number">57418</span>;</span>
<span class="line" id="L204"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_up: <span class="tok-type">u21</span> = <span class="tok-number">57419</span>;</span>
<span class="line" id="L205"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_down: <span class="tok-type">u21</span> = <span class="tok-number">57420</span>;</span>
<span class="line" id="L206"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_page_up: <span class="tok-type">u21</span> = <span class="tok-number">57421</span>;</span>
<span class="line" id="L207"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_page_down: <span class="tok-type">u21</span> = <span class="tok-number">57422</span>;</span>
<span class="line" id="L208"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_home: <span class="tok-type">u21</span> = <span class="tok-number">57423</span>;</span>
<span class="line" id="L209"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_end: <span class="tok-type">u21</span> = <span class="tok-number">57424</span>;</span>
<span class="line" id="L210"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_insert: <span class="tok-type">u21</span> = <span class="tok-number">57425</span>;</span>
<span class="line" id="L211"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_delete: <span class="tok-type">u21</span> = <span class="tok-number">57426</span>;</span>
<span class="line" id="L212"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kp_begin: <span class="tok-type">u21</span> = <span class="tok-number">57427</span>;</span>
<span class="line" id="L213"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_play: <span class="tok-type">u21</span> = <span class="tok-number">57428</span>;</span>
<span class="line" id="L214"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_pause: <span class="tok-type">u21</span> = <span class="tok-number">57429</span>;</span>
<span class="line" id="L215"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_play_pause: <span class="tok-type">u21</span> = <span class="tok-number">57430</span>;</span>
<span class="line" id="L216"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_reverse: <span class="tok-type">u21</span> = <span class="tok-number">57431</span>;</span>
<span class="line" id="L217"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_stop: <span class="tok-type">u21</span> = <span class="tok-number">57432</span>;</span>
<span class="line" id="L218"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_fast_forward: <span class="tok-type">u21</span> = <span class="tok-number">57433</span>;</span>
<span class="line" id="L219"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_rewind: <span class="tok-type">u21</span> = <span class="tok-number">57434</span>;</span>
<span class="line" id="L220"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_track_next: <span class="tok-type">u21</span> = <span class="tok-number">57435</span>;</span>
<span class="line" id="L221"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_track_previous: <span class="tok-type">u21</span> = <span class="tok-number">57436</span>;</span>
<span class="line" id="L222"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> media_record: <span class="tok-type">u21</span> = <span class="tok-number">57437</span>;</span>
<span class="line" id="L223"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> lower_volume: <span class="tok-type">u21</span> = <span class="tok-number">57438</span>;</span>
<span class="line" id="L224"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> raise_volume: <span class="tok-type">u21</span> = <span class="tok-number">57439</span>;</span>
<span class="line" id="L225"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> mute_volume: <span class="tok-type">u21</span> = <span class="tok-number">57440</span>;</span>
<span class="line" id="L226"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left_shift: <span class="tok-type">u21</span> = <span class="tok-number">57441</span>;</span>
<span class="line" id="L227"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left_control: <span class="tok-type">u21</span> = <span class="tok-number">57442</span>;</span>
<span class="line" id="L228"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left_alt: <span class="tok-type">u21</span> = <span class="tok-number">57443</span>;</span>
<span class="line" id="L229"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left_super: <span class="tok-type">u21</span> = <span class="tok-number">57444</span>;</span>
<span class="line" id="L230"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left_hyper: <span class="tok-type">u21</span> = <span class="tok-number">57445</span>;</span>
<span class="line" id="L231"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> left_meta: <span class="tok-type">u21</span> = <span class="tok-number">57446</span>;</span>
<span class="line" id="L232"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right_shift: <span class="tok-type">u21</span> = <span class="tok-number">57447</span>;</span>
<span class="line" id="L233"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right_control: <span class="tok-type">u21</span> = <span class="tok-number">57448</span>;</span>
<span class="line" id="L234"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right_alt: <span class="tok-type">u21</span> = <span class="tok-number">57449</span>;</span>
<span class="line" id="L235"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right_super: <span class="tok-type">u21</span> = <span class="tok-number">57450</span>;</span>
<span class="line" id="L236"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right_hyper: <span class="tok-type">u21</span> = <span class="tok-number">57451</span>;</span>
<span class="line" id="L237"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> right_meta: <span class="tok-type">u21</span> = <span class="tok-number">57452</span>;</span>
<span class="line" id="L238"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> iso_level_3_shift: <span class="tok-type">u21</span> = <span class="tok-number">57453</span>;</span>
<span class="line" id="L239"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> iso_level_5_shift: <span class="tok-type">u21</span> = <span class="tok-number">57454</span>;</span>
<span class="line" id="L240"></span>
<span class="line" id="L241"><span class="tok-kw">test</span> <span class="tok-str">&quot;matches 'a'&quot;</span> {</span>
<span class="line" id="L242"> <span class="tok-kw">const</span> key: Key = .{</span>
<span class="line" id="L243"> .codepoint = <span class="tok-str">'a'</span>,</span>
<span class="line" id="L244"> };</span>
<span class="line" id="L245"> <span class="tok-kw">try</span> testing.expect(key.matches(<span class="tok-str">'a'</span>, .{}));</span>
<span class="line" id="L246">}</span>
<span class="line" id="L247"></span>
<span class="line" id="L248"><span class="tok-kw">test</span> <span class="tok-str">&quot;matches 'shift+a'&quot;</span> {</span>
<span class="line" id="L249"> <span class="tok-kw">const</span> key: Key = .{</span>
<span class="line" id="L250"> .codepoint = <span class="tok-str">'a'</span>,</span>
<span class="line" id="L251"> .mods = .{ .shift = <span class="tok-null">true</span> },</span>
<span class="line" id="L252"> .text = <span class="tok-str">&quot;A&quot;</span>,</span>
<span class="line" id="L253"> };</span>
<span class="line" id="L254"> <span class="tok-kw">try</span> testing.expect(key.matches(<span class="tok-str">'a'</span>, .{ .shift = <span class="tok-null">true</span> }));</span>
<span class="line" id="L255"> <span class="tok-kw">try</span> testing.expect(key.matches(<span class="tok-str">'A'</span>, .{}));</span>
<span class="line" id="L256"> <span class="tok-kw">try</span> testing.expect(!key.matches(<span class="tok-str">'A'</span>, .{ .ctrl = <span class="tok-null">true</span> }));</span>
<span class="line" id="L257">}</span>
<span class="line" id="L258"></span>
<span class="line" id="L259"><span class="tok-kw">test</span> <span class="tok-str">&quot;matches 'shift+tab'&quot;</span> {</span>
<span class="line" id="L260"> <span class="tok-kw">const</span> key: Key = .{</span>
<span class="line" id="L261"> .codepoint = Key.tab,</span>
<span class="line" id="L262"> .mods = .{ .shift = <span class="tok-null">true</span> },</span>
<span class="line" id="L263"> };</span>
<span class="line" id="L264"> <span class="tok-kw">try</span> testing.expect(key.matches(Key.tab, .{ .shift = <span class="tok-null">true</span> }));</span>
<span class="line" id="L265"> <span class="tok-kw">try</span> testing.expect(!key.matches(Key.tab, .{}));</span>
<span class="line" id="L266">}</span>
<span class="line" id="L267"></span>
<span class="line" id="L268"><span class="tok-kw">test</span> <span class="tok-str">&quot;matches 'shift+;'&quot;</span> {</span>
<span class="line" id="L269"> <span class="tok-kw">const</span> key: Key = .{</span>
<span class="line" id="L270"> .codepoint = <span class="tok-str">';'</span>,</span>
<span class="line" id="L271"> .shifted_codepoint = <span class="tok-str">':'</span>,</span>
<span class="line" id="L272"> .mods = .{ .shift = <span class="tok-null">true</span> },</span>
<span class="line" id="L273"> .text = <span class="tok-str">&quot;:&quot;</span>,</span>
<span class="line" id="L274"> };</span>
<span class="line" id="L275"> <span class="tok-kw">try</span> testing.expect(key.matches(<span class="tok-str">';'</span>, .{ .shift = <span class="tok-null">true</span> }));</span>
<span class="line" id="L276"> <span class="tok-kw">try</span> testing.expect(key.matches(<span class="tok-str">':'</span>, .{}));</span>
<span class="line" id="L277"></span>
<span class="line" id="L278"> <span class="tok-kw">const</span> colon: Key = .{</span>
<span class="line" id="L279"> .codepoint = <span class="tok-str">':'</span>,</span>
<span class="line" id="L280"> .mods = .{},</span>
<span class="line" id="L281"> };</span>
<span class="line" id="L282"> <span class="tok-kw">try</span> testing.expect(colon.matches(<span class="tok-str">':'</span>, .{}));</span>
<span class="line" id="L283">}</span>
<span class="line" id="L284"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">/// A mouse event</span></span>
<span class="line" id="L2"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Mouse = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Shape = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L5"> default,</span>
<span class="line" id="L6"> text,</span>
<span class="line" id="L7"> pointer,</span>
<span class="line" id="L8"> help,</span>
<span class="line" id="L9"> progress,</span>
<span class="line" id="L10"> wait,</span>
<span class="line" id="L11"> @&quot;ew-resize&quot;,</span>
<span class="line" id="L12"> @&quot;ns-resize&quot;,</span>
<span class="line" id="L13"> cell,</span>
<span class="line" id="L14">};</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Button = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L17"> left,</span>
<span class="line" id="L18"> middle,</span>
<span class="line" id="L19"> right,</span>
<span class="line" id="L20"> none,</span>
<span class="line" id="L21"> wheel_up = <span class="tok-number">64</span>,</span>
<span class="line" id="L22"> wheel_down = <span class="tok-number">65</span>,</span>
<span class="line" id="L23"> button_8 = <span class="tok-number">128</span>,</span>
<span class="line" id="L24"> button_9 = <span class="tok-number">129</span>,</span>
<span class="line" id="L25"> button_10 = <span class="tok-number">130</span>,</span>
<span class="line" id="L26"> button_11 = <span class="tok-number">131</span>,</span>
<span class="line" id="L27">};</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Modifiers = <span class="tok-kw">packed</span> <span class="tok-kw">struct</span>(<span class="tok-type">u3</span>) {</span>
<span class="line" id="L30"> shift: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L31"> alt: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L32"> ctrl: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L33">};</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Type = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L36"> press,</span>
<span class="line" id="L37"> release,</span>
<span class="line" id="L38"> motion,</span>
<span class="line" id="L39"> drag,</span>
<span class="line" id="L40">};</span>
<span class="line" id="L41"></span>
<span class="line" id="L42">col: <span class="tok-type">usize</span>,</span>
<span class="line" id="L43">row: <span class="tok-type">usize</span>,</span>
<span class="line" id="L44">button: Button,</span>
<span class="line" id="L45">mods: Modifiers,</span>
<span class="line" id="L46"><span class="tok-type">type</span>: Type,</span>
<span class="line" id="L47"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">/// Runtime options</span></span>
<span class="line" id="L2"><span class="tok-kw">const</span> Options = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L3"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> assert = std.debug.assert;</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> Cell = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Shape = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Mouse.zig&quot;</span>).Shape;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Image.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> Winsize = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Tty.zig&quot;</span>).Winsize;</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">const</span> log = std.log.scoped(.screen);</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">const</span> Screen = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L12"></span>
<span class="line" id="L13">width: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L14">height: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L15"></span>
<span class="line" id="L16">width_pix: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L17">height_pix: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L18"></span>
<span class="line" id="L19">buf: []Cell = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L20"></span>
<span class="line" id="L21">cursor_row: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L22">cursor_col: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L23">cursor_vis: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"><span class="tok-comment">/// true when we measure cells with unicode</span></span>
<span class="line" id="L26">unicode: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L27"></span>
<span class="line" id="L28">mouse_shape: Shape = .default,</span>
<span class="line" id="L29"></span>
<span class="line" id="L30"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(alloc: std.mem.Allocator, winsize: Winsize) !Screen {</span>
<span class="line" id="L31"> <span class="tok-kw">const</span> w = winsize.cols;</span>
<span class="line" id="L32"> <span class="tok-kw">const</span> h = winsize.rows;</span>
<span class="line" id="L33"> <span class="tok-kw">var</span> self = Screen{</span>
<span class="line" id="L34"> .buf = <span class="tok-kw">try</span> alloc.alloc(Cell, w * h),</span>
<span class="line" id="L35"> .width = w,</span>
<span class="line" id="L36"> .height = h,</span>
<span class="line" id="L37"> .width_pix = winsize.x_pixel,</span>
<span class="line" id="L38"> .height_pix = winsize.y_pixel,</span>
<span class="line" id="L39"> };</span>
<span class="line" id="L40"> <span class="tok-kw">for</span> (self.buf, <span class="tok-number">0</span>..) |_, i| {</span>
<span class="line" id="L41"> self.buf[i] = .{};</span>
<span class="line" id="L42"> }</span>
<span class="line" id="L43"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L44">}</span>
<span class="line" id="L45"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Screen, alloc: std.mem.Allocator) <span class="tok-type">void</span> {</span>
<span class="line" id="L46"> alloc.free(self.buf);</span>
<span class="line" id="L47">}</span>
<span class="line" id="L48"></span>
<span class="line" id="L49"><span class="tok-comment">/// writes a cell to a location. 0 indexed</span></span>
<span class="line" id="L50"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeCell</span>(self: *Screen, col: <span class="tok-type">usize</span>, row: <span class="tok-type">usize</span>, cell: Cell) <span class="tok-type">void</span> {</span>
<span class="line" id="L51"> <span class="tok-kw">if</span> (self.width &lt; col) {</span>
<span class="line" id="L52"> <span class="tok-comment">// column out of bounds</span>
</span>
<span class="line" id="L53"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L54"> }</span>
<span class="line" id="L55"> <span class="tok-kw">if</span> (self.height &lt; row) {</span>
<span class="line" id="L56"> <span class="tok-comment">// height out of bounds</span>
</span>
<span class="line" id="L57"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L58"> }</span>
<span class="line" id="L59"> <span class="tok-kw">const</span> i = (row * self.width) + col;</span>
<span class="line" id="L60"> assert(i &lt; self.buf.len);</span>
<span class="line" id="L61"> self.buf[i] = cell;</span>
<span class="line" id="L62">}</span>
<span class="line" id="L63"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> builtin = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;builtin&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> os = std.os;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Vaxis = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;vaxis.zig&quot;</span>).Vaxis;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Parser = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Parser.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> GraphemeCache = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;GraphemeCache.zig&quot;</span>);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">const</span> log = std.log.scoped(.tty);</span>
<span class="line" id="L9"></span>
<span class="line" id="L10"><span class="tok-kw">const</span> Tty = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-kw">const</span> Writer = std.io.Writer(os.fd_t, os.WriteError, os.write);</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> BufferedWriter = std.io.BufferedWriter(<span class="tok-number">4096</span>, Writer);</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-comment">/// the original state of the terminal, prior to calling makeRaw</span></span>
<span class="line" id="L17">termios: os.termios,</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-comment">/// The file descriptor we are using for I/O</span></span>
<span class="line" id="L20">fd: os.fd_t,</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"><span class="tok-comment">/// the write end of a pipe to signal the tty should exit it's run loop</span></span>
<span class="line" id="L23">quit_fd: ?os.fd_t = <span class="tok-null">null</span>,</span>
<span class="line" id="L24"></span>
<span class="line" id="L25">buffered_writer: BufferedWriter,</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"><span class="tok-comment">/// initializes a Tty instance by opening /dev/tty and &quot;making it raw&quot;</span></span>
<span class="line" id="L28"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>() !Tty {</span>
<span class="line" id="L29"> <span class="tok-comment">// Open our tty</span>
</span>
<span class="line" id="L30"> <span class="tok-kw">const</span> fd = <span class="tok-kw">try</span> os.open(<span class="tok-str">&quot;/dev/tty&quot;</span>, .{ .ACCMODE = .RDWR }, <span class="tok-number">0</span>);</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"> <span class="tok-comment">// Set the termios of the tty</span>
</span>
<span class="line" id="L33"> <span class="tok-kw">const</span> termios = <span class="tok-kw">try</span> makeRaw(fd);</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"> <span class="tok-kw">return</span> Tty{</span>
<span class="line" id="L36"> .fd = fd,</span>
<span class="line" id="L37"> .termios = termios,</span>
<span class="line" id="L38"> .buffered_writer = std.io.bufferedWriter(Writer{ .context = fd }),</span>
<span class="line" id="L39"> };</span>
<span class="line" id="L40">}</span>
<span class="line" id="L41"></span>
<span class="line" id="L42"><span class="tok-comment">/// release resources associated with the Tty return it to it's original state</span></span>
<span class="line" id="L43"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Tty) <span class="tok-type">void</span> {</span>
<span class="line" id="L44"> os.tcsetattr(self.fd, .FLUSH, self.termios) <span class="tok-kw">catch</span> |err| {</span>
<span class="line" id="L45"> log.err(<span class="tok-str">&quot;couldn't restore terminal: {}&quot;</span>, .{err});</span>
<span class="line" id="L46"> };</span>
<span class="line" id="L47"> os.close(self.fd);</span>
<span class="line" id="L48">}</span>
<span class="line" id="L49"></span>
<span class="line" id="L50"><span class="tok-comment">/// stops the run loop</span></span>
<span class="line" id="L51"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">stop</span>(self: *Tty) <span class="tok-type">void</span> {</span>
<span class="line" id="L52"> <span class="tok-kw">if</span> (self.quit_fd) |fd| {</span>
<span class="line" id="L53"> _ = std.os.write(fd, <span class="tok-str">&quot;q&quot;</span>) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L54"> }</span>
<span class="line" id="L55">}</span>
<span class="line" id="L56"></span>
<span class="line" id="L57"><span class="tok-comment">/// read input from the tty</span></span>
<span class="line" id="L58"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">run</span>(</span>
<span class="line" id="L59"> self: *Tty,</span>
<span class="line" id="L60"> <span class="tok-kw">comptime</span> Event: <span class="tok-type">type</span>,</span>
<span class="line" id="L61"> vx: *Vaxis(Event),</span>
<span class="line" id="L62">) !<span class="tok-type">void</span> {</span>
<span class="line" id="L63"> <span class="tok-comment">// create a pipe so we can signal to exit the run loop</span>
</span>
<span class="line" id="L64"> <span class="tok-kw">const</span> pipe = <span class="tok-kw">try</span> os.pipe();</span>
<span class="line" id="L65"> <span class="tok-kw">defer</span> os.close(pipe[<span class="tok-number">0</span>]);</span>
<span class="line" id="L66"> <span class="tok-kw">defer</span> os.close(pipe[<span class="tok-number">1</span>]);</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> <span class="tok-comment">// get our initial winsize</span>
</span>
<span class="line" id="L69"> <span class="tok-kw">const</span> winsize = <span class="tok-kw">try</span> getWinsize(self.fd);</span>
<span class="line" id="L70"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;winsize&quot;</span>)) {</span>
<span class="line" id="L71"> vx.postEvent(.{ .winsize = winsize });</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"> <span class="tok-comment">// assign the write end of the pipe to our quit_fd</span>
</span>
<span class="line" id="L75"> self.quit_fd = pipe[<span class="tok-number">1</span>];</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-comment">// Build a winch handler. We need build this struct to get an anonymous</span>
</span>
<span class="line" id="L78"> <span class="tok-comment">// function which can post the winsize event</span>
</span>
<span class="line" id="L79"> <span class="tok-comment">// TODO: more signals, move this outside of this function?</span>
</span>
<span class="line" id="L80"> <span class="tok-kw">const</span> WinchHandler = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L81"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L82"></span>
<span class="line" id="L83"> <span class="tok-kw">var</span> vx_winch: *Vaxis(Event) = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L84"> <span class="tok-kw">var</span> fd: os.fd_t = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L85"></span>
<span class="line" id="L86"> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(vx_arg: *Vaxis(Event), fd_arg: os.fd_t) !<span class="tok-type">void</span> {</span>
<span class="line" id="L87"> vx_winch = vx_arg;</span>
<span class="line" id="L88"> fd = fd_arg;</span>
<span class="line" id="L89"> <span class="tok-kw">var</span> act = os.Sigaction{</span>
<span class="line" id="L90"> .handler = .{ .handler = Self.handleWinch },</span>
<span class="line" id="L91"> .mask = <span class="tok-kw">switch</span> (builtin.os.tag) {</span>
<span class="line" id="L92"> .macos =&gt; <span class="tok-number">0</span>,</span>
<span class="line" id="L93"> .linux =&gt; std.os.empty_sigset,</span>
<span class="line" id="L94"> <span class="tok-kw">else</span> =&gt; <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;os not supported&quot;</span>),</span>
<span class="line" id="L95"> },</span>
<span class="line" id="L96"> .flags = <span class="tok-number">0</span>,</span>
<span class="line" id="L97"> };</span>
<span class="line" id="L98"></span>
<span class="line" id="L99"> <span class="tok-kw">try</span> os.sigaction(os.SIG.WINCH, &amp;act, <span class="tok-null">null</span>);</span>
<span class="line" id="L100"> }</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">fn</span> <span class="tok-fn">handleWinch</span>(_: <span class="tok-type">c_int</span>) <span class="tok-kw">callconv</span>(.C) <span class="tok-type">void</span> {</span>
<span class="line" id="L103"> <span class="tok-kw">const</span> ws = getWinsize(fd) <span class="tok-kw">catch</span> {</span>
<span class="line" id="L104"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L105"> };</span>
<span class="line" id="L106"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;winsize&quot;</span>)) {</span>
<span class="line" id="L107"> vx_winch.postEvent(.{ .winsize = ws });</span>
<span class="line" id="L108"> }</span>
<span class="line" id="L109"> }</span>
<span class="line" id="L110"> };</span>
<span class="line" id="L111"> <span class="tok-kw">try</span> WinchHandler.init(vx, self.fd);</span>
<span class="line" id="L112"></span>
<span class="line" id="L113"> <span class="tok-comment">// initialize a grapheme cache</span>
</span>
<span class="line" id="L114"> <span class="tok-kw">var</span> cache: GraphemeCache = .{};</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"> <span class="tok-comment">// Set up fds for polling</span>
</span>
<span class="line" id="L117"> <span class="tok-kw">var</span> pollfds: [<span class="tok-number">2</span>]std.os.pollfd = .{</span>
<span class="line" id="L118"> .{ .fd = self.fd, .events = std.os.POLL.IN, .revents = <span class="tok-null">undefined</span> },</span>
<span class="line" id="L119"> .{ .fd = pipe[<span class="tok-number">0</span>], .events = std.os.POLL.IN, .revents = <span class="tok-null">undefined</span> },</span>
<span class="line" id="L120"> };</span>
<span class="line" id="L121"></span>
<span class="line" id="L122"> <span class="tok-kw">var</span> parser: Parser = .{};</span>
<span class="line" id="L123"></span>
<span class="line" id="L124"> <span class="tok-comment">// initialize the read buffer</span>
</span>
<span class="line" id="L125"> <span class="tok-kw">var</span> buf: [<span class="tok-number">1024</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L126"> <span class="tok-comment">// read loop</span>
</span>
<span class="line" id="L127"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L128"> _ = <span class="tok-kw">try</span> std.os.poll(&amp;pollfds, -<span class="tok-number">1</span>);</span>
<span class="line" id="L129"> <span class="tok-kw">if</span> (pollfds[<span class="tok-number">1</span>].revents &amp; std.os.POLL.IN != <span class="tok-number">0</span>) {</span>
<span class="line" id="L130"> log.info(<span class="tok-str">&quot;quitting read thread&quot;</span>, .{});</span>
<span class="line" id="L131"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L132"> }</span>
<span class="line" id="L133"></span>
<span class="line" id="L134"> <span class="tok-kw">const</span> n = <span class="tok-kw">try</span> os.read(self.fd, &amp;buf);</span>
<span class="line" id="L135"> <span class="tok-kw">var</span> start: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L136"> <span class="tok-kw">while</span> (start &lt; n) {</span>
<span class="line" id="L137"> <span class="tok-kw">const</span> result = <span class="tok-kw">try</span> parser.parse(buf[start..n]);</span>
<span class="line" id="L138"> start += result.n;</span>
<span class="line" id="L139"> <span class="tok-comment">// TODO: if we get 0 byte read, copy the remaining bytes to the</span>
</span>
<span class="line" id="L140"> <span class="tok-comment">// beginning of the buffer and read mmore? this should only happen</span>
</span>
<span class="line" id="L141"> <span class="tok-comment">// if we are in the middle of a grapheme at and filled our</span>
</span>
<span class="line" id="L142"> <span class="tok-comment">// buffer. Probably can happen on large pastes so needs to be</span>
</span>
<span class="line" id="L143"> <span class="tok-comment">// implemented but low priority</span>
</span>
<span class="line" id="L144"></span>
<span class="line" id="L145"> <span class="tok-kw">const</span> event = result.event <span class="tok-kw">orelse</span> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L146"> <span class="tok-kw">switch</span> (event) {</span>
<span class="line" id="L147"> .key_press =&gt; |key| {</span>
<span class="line" id="L148"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;key_press&quot;</span>)) {</span>
<span class="line" id="L149"> <span class="tok-comment">// HACK: yuck. there has to be a better way</span>
</span>
<span class="line" id="L150"> <span class="tok-kw">var</span> mut_key = key;</span>
<span class="line" id="L151"> <span class="tok-kw">if</span> (key.text) |text| {</span>
<span class="line" id="L152"> mut_key.text = cache.put(text);</span>
<span class="line" id="L153"> }</span>
<span class="line" id="L154"> vx.postEvent(.{ .key_press = mut_key });</span>
<span class="line" id="L155"> }</span>
<span class="line" id="L156"> },</span>
<span class="line" id="L157"> .mouse =&gt; |mouse| {</span>
<span class="line" id="L158"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;mouse&quot;</span>)) {</span>
<span class="line" id="L159"> vx.postEvent(.{ .mouse = mouse });</span>
<span class="line" id="L160"> }</span>
<span class="line" id="L161"> },</span>
<span class="line" id="L162"> .focus_in =&gt; {</span>
<span class="line" id="L163"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;focus_in&quot;</span>)) {</span>
<span class="line" id="L164"> vx.postEvent(.focus_in);</span>
<span class="line" id="L165"> }</span>
<span class="line" id="L166"> },</span>
<span class="line" id="L167"> .focus_out =&gt; {</span>
<span class="line" id="L168"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;focus_out&quot;</span>)) {</span>
<span class="line" id="L169"> vx.postEvent(.focus_out);</span>
<span class="line" id="L170"> }</span>
<span class="line" id="L171"> },</span>
<span class="line" id="L172"> .paste_start =&gt; {</span>
<span class="line" id="L173"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;paste_start&quot;</span>)) {</span>
<span class="line" id="L174"> vx.postEvent(.paste_start);</span>
<span class="line" id="L175"> }</span>
<span class="line" id="L176"> },</span>
<span class="line" id="L177"> .paste_end =&gt; {</span>
<span class="line" id="L178"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;paste_end&quot;</span>)) {</span>
<span class="line" id="L179"> vx.postEvent(.paste_end);</span>
<span class="line" id="L180"> }</span>
<span class="line" id="L181"> },</span>
<span class="line" id="L182"> .cap_kitty_keyboard =&gt; {</span>
<span class="line" id="L183"> log.info(<span class="tok-str">&quot;kitty keyboard capability detected&quot;</span>, .{});</span>
<span class="line" id="L184"> vx.caps.kitty_keyboard = <span class="tok-null">true</span>;</span>
<span class="line" id="L185"> },</span>
<span class="line" id="L186"> .cap_kitty_graphics =&gt; {</span>
<span class="line" id="L187"> <span class="tok-kw">if</span> (!vx.caps.kitty_graphics) {</span>
<span class="line" id="L188"> log.info(<span class="tok-str">&quot;kitty graphics capability detected&quot;</span>, .{});</span>
<span class="line" id="L189"> vx.caps.kitty_graphics = <span class="tok-null">true</span>;</span>
<span class="line" id="L190"> }</span>
<span class="line" id="L191"> },</span>
<span class="line" id="L192"> .cap_rgb =&gt; {</span>
<span class="line" id="L193"> log.info(<span class="tok-str">&quot;rgb capability detected&quot;</span>, .{});</span>
<span class="line" id="L194"> vx.caps.rgb = <span class="tok-null">true</span>;</span>
<span class="line" id="L195"> },</span>
<span class="line" id="L196"> .cap_unicode =&gt; {</span>
<span class="line" id="L197"> log.info(<span class="tok-str">&quot;unicode capability detected&quot;</span>, .{});</span>
<span class="line" id="L198"> vx.caps.unicode = <span class="tok-null">true</span>;</span>
<span class="line" id="L199"> vx.screen.unicode = <span class="tok-null">true</span>;</span>
<span class="line" id="L200"> },</span>
<span class="line" id="L201"> .cap_da1 =&gt; {</span>
<span class="line" id="L202"> std.Thread.Futex.wake(&amp;vx.query_futex, <span class="tok-number">10</span>);</span>
<span class="line" id="L203"> },</span>
<span class="line" id="L204"> }</span>
<span class="line" id="L205"> }</span>
<span class="line" id="L206"> }</span>
<span class="line" id="L207">}</span>
<span class="line" id="L208"></span>
<span class="line" id="L209"><span class="tok-comment">/// write to the tty. These writes are buffered and require calling flush to</span></span>
<span class="line" id="L210"><span class="tok-comment">/// flush writes to the tty</span></span>
<span class="line" id="L211"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: *Tty, bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">usize</span> {</span>
<span class="line" id="L212"> <span class="tok-kw">return</span> self.buffered_writer.write(bytes);</span>
<span class="line" id="L213">}</span>
<span class="line" id="L214"></span>
<span class="line" id="L215"><span class="tok-comment">/// flushes the write buffer to the tty</span></span>
<span class="line" id="L216"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">flush</span>(self: *Tty) !<span class="tok-type">void</span> {</span>
<span class="line" id="L217"> <span class="tok-kw">try</span> self.buffered_writer.flush();</span>
<span class="line" id="L218">}</span>
<span class="line" id="L219"></span>
<span class="line" id="L220"><span class="tok-comment">/// makeRaw enters the raw state for the terminal.</span></span>
<span class="line" id="L221"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">makeRaw</span>(fd: os.fd_t) !os.termios {</span>
<span class="line" id="L222"> <span class="tok-kw">const</span> state = <span class="tok-kw">try</span> os.tcgetattr(fd);</span>
<span class="line" id="L223"> <span class="tok-kw">var</span> raw = state;</span>
<span class="line" id="L224"> <span class="tok-comment">// see termios(3)</span>
</span>
<span class="line" id="L225"> raw.iflag.IGNBRK = <span class="tok-null">false</span>;</span>
<span class="line" id="L226"> raw.iflag.BRKINT = <span class="tok-null">false</span>;</span>
<span class="line" id="L227"> raw.iflag.ISTRIP = <span class="tok-null">false</span>;</span>
<span class="line" id="L228"> raw.iflag.INLCR = <span class="tok-null">false</span>;</span>
<span class="line" id="L229"> raw.iflag.IGNCR = <span class="tok-null">false</span>;</span>
<span class="line" id="L230"> raw.iflag.ICRNL = <span class="tok-null">false</span>;</span>
<span class="line" id="L231"> raw.iflag.IXON = <span class="tok-null">false</span>;</span>
<span class="line" id="L232"></span>
<span class="line" id="L233"> raw.oflag.OPOST = <span class="tok-null">false</span>;</span>
<span class="line" id="L234"></span>
<span class="line" id="L235"> raw.lflag.ECHO = <span class="tok-null">false</span>;</span>
<span class="line" id="L236"> raw.lflag.ECHONL = <span class="tok-null">false</span>;</span>
<span class="line" id="L237"> raw.lflag.ICANON = <span class="tok-null">false</span>;</span>
<span class="line" id="L238"> raw.lflag.IEXTEN = <span class="tok-null">false</span>;</span>
<span class="line" id="L239"></span>
<span class="line" id="L240"> raw.cflag.CSIZE = .CS8;</span>
<span class="line" id="L241"> raw.cflag.PARENB = <span class="tok-null">false</span>;</span>
<span class="line" id="L242"></span>
<span class="line" id="L243"> raw.cc[<span class="tok-builtin">@intFromEnum</span>(std.posix.V.MIN)] = <span class="tok-number">1</span>;</span>
<span class="line" id="L244"> raw.cc[<span class="tok-builtin">@intFromEnum</span>(std.posix.V.TIME)] = <span class="tok-number">0</span>;</span>
<span class="line" id="L245"> <span class="tok-kw">try</span> os.tcsetattr(fd, .FLUSH, raw);</span>
<span class="line" id="L246"> <span class="tok-kw">return</span> state;</span>
<span class="line" id="L247">}</span>
<span class="line" id="L248"></span>
<span class="line" id="L249"><span class="tok-comment">/// The size of the terminal screen</span></span>
<span class="line" id="L250"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Winsize = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L251"> rows: <span class="tok-type">usize</span>,</span>
<span class="line" id="L252"> cols: <span class="tok-type">usize</span>,</span>
<span class="line" id="L253"> x_pixel: <span class="tok-type">usize</span>,</span>
<span class="line" id="L254"> y_pixel: <span class="tok-type">usize</span>,</span>
<span class="line" id="L255">};</span>
<span class="line" id="L256"></span>
<span class="line" id="L257"><span class="tok-kw">fn</span> <span class="tok-fn">getWinsize</span>(fd: os.fd_t) !Winsize {</span>
<span class="line" id="L258"> <span class="tok-kw">var</span> winsize = os.winsize{</span>
<span class="line" id="L259"> .ws_row = <span class="tok-number">0</span>,</span>
<span class="line" id="L260"> .ws_col = <span class="tok-number">0</span>,</span>
<span class="line" id="L261"> .ws_xpixel = <span class="tok-number">0</span>,</span>
<span class="line" id="L262"> .ws_ypixel = <span class="tok-number">0</span>,</span>
<span class="line" id="L263"> };</span>
<span class="line" id="L264"></span>
<span class="line" id="L265"> <span class="tok-kw">const</span> err = os.system.ioctl(fd, os.T.IOCGWINSZ, <span class="tok-builtin">@intFromPtr</span>(&amp;winsize));</span>
<span class="line" id="L266"> <span class="tok-kw">if</span> (os.errno(err) == .SUCCESS)</span>
<span class="line" id="L267"> <span class="tok-kw">return</span> Winsize{</span>
<span class="line" id="L268"> .rows = winsize.ws_row,</span>
<span class="line" id="L269"> .cols = winsize.ws_col,</span>
<span class="line" id="L270"> .x_pixel = winsize.ws_xpixel,</span>
<span class="line" id="L271"> .y_pixel = winsize.ws_ypixel,</span>
<span class="line" id="L272"> };</span>
<span class="line" id="L273"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.IoctlError;</span>
<span class="line" id="L274">}</span>
<span class="line" id="L275"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> ziglyph = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> WordIterator = ziglyph.WordIterator;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> GraphemeIterator = ziglyph.GraphemeIterator;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> Screen = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Screen.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> Cell = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> Segment = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>).Segment;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> gw = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;gwidth.zig&quot;</span>);</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">const</span> log = std.log.scoped(.window);</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-kw">const</span> Window = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Size = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L16"> expand,</span>
<span class="line" id="L17"> limit: <span class="tok-type">usize</span>,</span>
<span class="line" id="L18">};</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-comment">/// horizontal offset from the screen</span></span>
<span class="line" id="L21">x_off: <span class="tok-type">usize</span>,</span>
<span class="line" id="L22"><span class="tok-comment">/// vertical offset from the screen</span></span>
<span class="line" id="L23">y_off: <span class="tok-type">usize</span>,</span>
<span class="line" id="L24"><span class="tok-comment">/// width of the window. This can't be larger than the terminal screen</span></span>
<span class="line" id="L25">width: <span class="tok-type">usize</span>,</span>
<span class="line" id="L26"><span class="tok-comment">/// height of the window. This can't be larger than the terminal screen</span></span>
<span class="line" id="L27">height: <span class="tok-type">usize</span>,</span>
<span class="line" id="L28"></span>
<span class="line" id="L29">screen: *Screen,</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"><span class="tok-comment">/// Creates a new window with offset relative to parent and size clamped to the</span></span>
<span class="line" id="L32"><span class="tok-comment">/// parent's size. Windows do not retain a reference to their parent and are</span></span>
<span class="line" id="L33"><span class="tok-comment">/// unaware of resizes.</span></span>
<span class="line" id="L34"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">initChild</span>(</span>
<span class="line" id="L35"> self: Window,</span>
<span class="line" id="L36"> x_off: <span class="tok-type">usize</span>,</span>
<span class="line" id="L37"> y_off: <span class="tok-type">usize</span>,</span>
<span class="line" id="L38"> width: Size,</span>
<span class="line" id="L39"> height: Size,</span>
<span class="line" id="L40">) Window {</span>
<span class="line" id="L41"> <span class="tok-kw">const</span> resolved_width = <span class="tok-kw">switch</span> (width) {</span>
<span class="line" id="L42"> .expand =&gt; self.width - x_off,</span>
<span class="line" id="L43"> .limit =&gt; |w| blk: {</span>
<span class="line" id="L44"> <span class="tok-kw">if</span> (w + x_off &gt; self.width) {</span>
<span class="line" id="L45"> <span class="tok-kw">break</span> :blk self.width - x_off;</span>
<span class="line" id="L46"> }</span>
<span class="line" id="L47"> <span class="tok-kw">break</span> :blk w;</span>
<span class="line" id="L48"> },</span>
<span class="line" id="L49"> };</span>
<span class="line" id="L50"> <span class="tok-kw">const</span> resolved_height = <span class="tok-kw">switch</span> (height) {</span>
<span class="line" id="L51"> .expand =&gt; self.height - y_off,</span>
<span class="line" id="L52"> .limit =&gt; |h| blk: {</span>
<span class="line" id="L53"> <span class="tok-kw">if</span> (h + y_off &gt; self.height) {</span>
<span class="line" id="L54"> <span class="tok-kw">break</span> :blk self.height - y_off;</span>
<span class="line" id="L55"> }</span>
<span class="line" id="L56"> <span class="tok-kw">break</span> :blk h;</span>
<span class="line" id="L57"> },</span>
<span class="line" id="L58"> };</span>
<span class="line" id="L59"> <span class="tok-kw">return</span> Window{</span>
<span class="line" id="L60"> .x_off = x_off + self.x_off,</span>
<span class="line" id="L61"> .y_off = y_off + self.y_off,</span>
<span class="line" id="L62"> .width = resolved_width,</span>
<span class="line" id="L63"> .height = resolved_height,</span>
<span class="line" id="L64"> .screen = self.screen,</span>
<span class="line" id="L65"> };</span>
<span class="line" id="L66">}</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"><span class="tok-comment">/// writes a cell to the location in the window</span></span>
<span class="line" id="L69"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeCell</span>(self: Window, col: <span class="tok-type">usize</span>, row: <span class="tok-type">usize</span>, cell: Cell) <span class="tok-type">void</span> {</span>
<span class="line" id="L70"> <span class="tok-kw">if</span> (self.height == <span class="tok-number">0</span> <span class="tok-kw">or</span> self.width == <span class="tok-number">0</span>) <span class="tok-kw">return</span>;</span>
<span class="line" id="L71"> <span class="tok-kw">if</span> (self.height &lt;= row <span class="tok-kw">or</span> self.width &lt;= col) <span class="tok-kw">return</span>;</span>
<span class="line" id="L72"> self.screen.writeCell(col + self.x_off, row + self.y_off, cell);</span>
<span class="line" id="L73">}</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"><span class="tok-comment">/// fills the window with the default cell</span></span>
<span class="line" id="L76"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">clear</span>(self: Window) <span class="tok-type">void</span> {</span>
<span class="line" id="L77"> self.fill(.{});</span>
<span class="line" id="L78">}</span>
<span class="line" id="L79"></span>
<span class="line" id="L80"><span class="tok-comment">/// returns the width of the grapheme. This depends on the terminal capabilities</span></span>
<span class="line" id="L81"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">gwidth</span>(self: Window, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L82"> <span class="tok-kw">const</span> m: gw.Method = <span class="tok-kw">if</span> (self.screen.unicode) .unicode <span class="tok-kw">else</span> .wcwidth;</span>
<span class="line" id="L83"> <span class="tok-kw">return</span> gw.gwidth(str, m) <span class="tok-kw">catch</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L84">}</span>
<span class="line" id="L85"></span>
<span class="line" id="L86"><span class="tok-comment">/// fills the window with the provided cell</span></span>
<span class="line" id="L87"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">fill</span>(self: Window, cell: Cell) <span class="tok-type">void</span> {</span>
<span class="line" id="L88"> <span class="tok-kw">var</span> row: <span class="tok-type">usize</span> = self.y_off;</span>
<span class="line" id="L89"> <span class="tok-kw">while</span> (row &lt; (self.height + self.y_off)) : (row += <span class="tok-number">1</span>) {</span>
<span class="line" id="L90"> <span class="tok-kw">var</span> col: <span class="tok-type">usize</span> = self.x_off;</span>
<span class="line" id="L91"> <span class="tok-kw">while</span> (col &lt; (self.width + self.x_off)) : (col += <span class="tok-number">1</span>) {</span>
<span class="line" id="L92"> self.screen.writeCell(col, row, cell);</span>
<span class="line" id="L93"> }</span>
<span class="line" id="L94"> }</span>
<span class="line" id="L95">}</span>
<span class="line" id="L96"></span>
<span class="line" id="L97"><span class="tok-comment">/// hide the cursor</span></span>
<span class="line" id="L98"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">hideCursor</span>(self: Window) <span class="tok-type">void</span> {</span>
<span class="line" id="L99"> self.screen.cursor_vis = <span class="tok-null">false</span>;</span>
<span class="line" id="L100">}</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"><span class="tok-comment">/// show the cursor at the given coordinates, 0 indexed</span></span>
<span class="line" id="L103"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">showCursor</span>(self: Window, col: <span class="tok-type">usize</span>, row: <span class="tok-type">usize</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L104"> <span class="tok-kw">if</span> (self.height == <span class="tok-number">0</span> <span class="tok-kw">or</span> self.width == <span class="tok-number">0</span>) <span class="tok-kw">return</span>;</span>
<span class="line" id="L105"> <span class="tok-kw">if</span> (self.height &lt;= row <span class="tok-kw">or</span> self.width &lt;= col) <span class="tok-kw">return</span>;</span>
<span class="line" id="L106"> self.screen.cursor_vis = <span class="tok-null">true</span>;</span>
<span class="line" id="L107"> self.screen.cursor_row = row + self.y_off;</span>
<span class="line" id="L108"> self.screen.cursor_col = col + self.x_off;</span>
<span class="line" id="L109">}</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"><span class="tok-comment">/// prints text in the window with simple word wrapping.</span></span>
<span class="line" id="L112"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">wrap</span>(self: Window, segments: []Segment) !<span class="tok-type">void</span> {</span>
<span class="line" id="L113"> <span class="tok-comment">// pub fn wrap(self: Window, str: []const u8) !void {</span>
</span>
<span class="line" id="L114"> <span class="tok-kw">var</span> row: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L115"> <span class="tok-kw">var</span> col: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L116"> <span class="tok-kw">var</span> wrapped: <span class="tok-type">bool</span> = <span class="tok-null">false</span>;</span>
<span class="line" id="L117"> <span class="tok-kw">for</span> (segments) |segment| {</span>
<span class="line" id="L118"> <span class="tok-kw">var</span> word_iter = <span class="tok-kw">try</span> WordIterator.init(segment.text);</span>
<span class="line" id="L119"> <span class="tok-kw">while</span> (word_iter.next()) |word| {</span>
<span class="line" id="L120"> <span class="tok-comment">// break lines when we need</span>
</span>
<span class="line" id="L121"> <span class="tok-kw">if</span> (word.bytes[<span class="tok-number">0</span>] == <span class="tok-str">'\r'</span> <span class="tok-kw">or</span> word.bytes[<span class="tok-number">0</span>] == <span class="tok-str">'\n'</span>) {</span>
<span class="line" id="L122"> row += <span class="tok-number">1</span>;</span>
<span class="line" id="L123"> col = <span class="tok-number">0</span>;</span>
<span class="line" id="L124"> wrapped = <span class="tok-null">false</span>;</span>
<span class="line" id="L125"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L126"> }</span>
<span class="line" id="L127"> <span class="tok-comment">// break lines when we can't fit this word, and the word isn't longer</span>
</span>
<span class="line" id="L128"> <span class="tok-comment">// than our width</span>
</span>
<span class="line" id="L129"> <span class="tok-kw">const</span> word_width = self.gwidth(word.bytes);</span>
<span class="line" id="L130"> <span class="tok-kw">if</span> (word_width + col &gt;= self.width <span class="tok-kw">and</span> word_width &lt; self.width) {</span>
<span class="line" id="L131"> row += <span class="tok-number">1</span>;</span>
<span class="line" id="L132"> col = <span class="tok-number">0</span>;</span>
<span class="line" id="L133"> wrapped = <span class="tok-null">true</span>;</span>
<span class="line" id="L134"> }</span>
<span class="line" id="L135"> <span class="tok-comment">// don't print whitespace in the first column, unless we had a hard</span>
</span>
<span class="line" id="L136"> <span class="tok-comment">// break</span>
</span>
<span class="line" id="L137"> <span class="tok-kw">if</span> (col == <span class="tok-number">0</span> <span class="tok-kw">and</span> std.mem.eql(<span class="tok-type">u8</span>, word.bytes, <span class="tok-str">&quot; &quot;</span>) <span class="tok-kw">and</span> wrapped) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L138"> <span class="tok-kw">var</span> iter = GraphemeIterator.init(word.bytes);</span>
<span class="line" id="L139"> <span class="tok-kw">while</span> (iter.next()) |grapheme| {</span>
<span class="line" id="L140"> <span class="tok-kw">if</span> (col &gt;= self.width) {</span>
<span class="line" id="L141"> row += <span class="tok-number">1</span>;</span>
<span class="line" id="L142"> col = <span class="tok-number">0</span>;</span>
<span class="line" id="L143"> wrapped = <span class="tok-null">true</span>;</span>
<span class="line" id="L144"> }</span>
<span class="line" id="L145"> <span class="tok-kw">const</span> s = grapheme.slice(word.bytes);</span>
<span class="line" id="L146"> <span class="tok-kw">const</span> w = self.gwidth(s);</span>
<span class="line" id="L147"> self.writeCell(col, row, .{</span>
<span class="line" id="L148"> .char = .{</span>
<span class="line" id="L149"> .grapheme = s,</span>
<span class="line" id="L150"> .width = w,</span>
<span class="line" id="L151"> },</span>
<span class="line" id="L152"> .style = segment.style,</span>
<span class="line" id="L153"> .link = segment.link,</span>
<span class="line" id="L154"> });</span>
<span class="line" id="L155"> col += w;</span>
<span class="line" id="L156"> }</span>
<span class="line" id="L157"> }</span>
<span class="line" id="L158"> }</span>
<span class="line" id="L159">}</span>
<span class="line" id="L160"></span>
<span class="line" id="L161"><span class="tok-kw">test</span> <span class="tok-str">&quot;Window size set&quot;</span> {</span>
<span class="line" id="L162"> <span class="tok-kw">var</span> parent = Window{</span>
<span class="line" id="L163"> .x_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L164"> .y_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L165"> .width = <span class="tok-number">20</span>,</span>
<span class="line" id="L166"> .height = <span class="tok-number">20</span>,</span>
<span class="line" id="L167"> .screen = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L168"> };</span>
<span class="line" id="L169"></span>
<span class="line" id="L170"> <span class="tok-kw">const</span> child = parent.initChild(<span class="tok-number">1</span>, <span class="tok-number">1</span>, .expand, .expand);</span>
<span class="line" id="L171"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">19</span>, child.width);</span>
<span class="line" id="L172"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">19</span>, child.height);</span>
<span class="line" id="L173">}</span>
<span class="line" id="L174"></span>
<span class="line" id="L175"><span class="tok-kw">test</span> <span class="tok-str">&quot;Window size set too big&quot;</span> {</span>
<span class="line" id="L176"> <span class="tok-kw">var</span> parent = Window{</span>
<span class="line" id="L177"> .x_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L178"> .y_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L179"> .width = <span class="tok-number">20</span>,</span>
<span class="line" id="L180"> .height = <span class="tok-number">20</span>,</span>
<span class="line" id="L181"> .screen = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L182"> };</span>
<span class="line" id="L183"></span>
<span class="line" id="L184"> <span class="tok-kw">const</span> child = parent.initChild(<span class="tok-number">0</span>, <span class="tok-number">0</span>, .{ .limit = <span class="tok-number">21</span> }, .{ .limit = <span class="tok-number">21</span> });</span>
<span class="line" id="L185"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">20</span>, child.width);</span>
<span class="line" id="L186"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">20</span>, child.height);</span>
<span class="line" id="L187">}</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"><span class="tok-kw">test</span> <span class="tok-str">&quot;Window size set too big with offset&quot;</span> {</span>
<span class="line" id="L190"> <span class="tok-kw">var</span> parent = Window{</span>
<span class="line" id="L191"> .x_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L192"> .y_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L193"> .width = <span class="tok-number">20</span>,</span>
<span class="line" id="L194"> .height = <span class="tok-number">20</span>,</span>
<span class="line" id="L195"> .screen = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L196"> };</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">const</span> child = parent.initChild(<span class="tok-number">10</span>, <span class="tok-number">10</span>, .{ .limit = <span class="tok-number">21</span> }, .{ .limit = <span class="tok-number">21</span> });</span>
<span class="line" id="L199"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">10</span>, child.width);</span>
<span class="line" id="L200"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">10</span>, child.height);</span>
<span class="line" id="L201">}</span>
<span class="line" id="L202"></span>
<span class="line" id="L203"><span class="tok-kw">test</span> <span class="tok-str">&quot;Window size nested offsets&quot;</span> {</span>
<span class="line" id="L204"> <span class="tok-kw">var</span> parent = Window{</span>
<span class="line" id="L205"> .x_off = <span class="tok-number">1</span>,</span>
<span class="line" id="L206"> .y_off = <span class="tok-number">1</span>,</span>
<span class="line" id="L207"> .width = <span class="tok-number">20</span>,</span>
<span class="line" id="L208"> .height = <span class="tok-number">20</span>,</span>
<span class="line" id="L209"> .screen = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L210"> };</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> <span class="tok-kw">const</span> child = parent.initChild(<span class="tok-number">10</span>, <span class="tok-number">10</span>, .{ .limit = <span class="tok-number">21</span> }, .{ .limit = <span class="tok-number">21</span> });</span>
<span class="line" id="L213"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">11</span>, child.x_off);</span>
<span class="line" id="L214"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">11</span>, child.y_off);</span>
<span class="line" id="L215">}</span>
<span class="line" id="L216"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Queries</span>
</span>
<span class="line" id="L2"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> primary_device_attrs = <span class="tok-str">&quot;\x1b[c&quot;</span>;</span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> tertiary_device_attrs = <span class="tok-str">&quot;\x1b[=c&quot;</span>;</span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> xtversion = <span class="tok-str">&quot;\x1b[&gt;0q&quot;</span>;</span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> decrqm_focus = <span class="tok-str">&quot;\x1b[?1004$p&quot;</span>;</span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> decrqm_sync = <span class="tok-str">&quot;\x1b[?2026$p&quot;</span>;</span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> decrqm_unicode = <span class="tok-str">&quot;\x1b[?2027$p&quot;</span>;</span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> decrqm_color_theme = <span class="tok-str">&quot;\x1b[?2031$p&quot;</span>;</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> csi_u_query = <span class="tok-str">&quot;\x1b[?u&quot;</span>;</span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kitty_graphics_query = <span class="tok-str">&quot;\x1b_Gi=1,a=q\x1b\\&quot;</span>;</span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> sixel_geometry_query = <span class="tok-str">&quot;\x1b[?2;1;0S&quot;</span>;</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-comment">// mouse</span>
</span>
<span class="line" id="L14"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> mouse_set = <span class="tok-str">&quot;\x1b[?1003;1004;1006h&quot;</span>;</span>
<span class="line" id="L15"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> mouse_reset = <span class="tok-str">&quot;\x1b[?1003;1004;1006l&quot;</span>;</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"><span class="tok-comment">// sync</span>
</span>
<span class="line" id="L18"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> sync_set = <span class="tok-str">&quot;\x1b[?2026h&quot;</span>;</span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> sync_reset = <span class="tok-str">&quot;\x1b[?2026l&quot;</span>;</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-comment">// unicode</span>
</span>
<span class="line" id="L22"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> unicode_set = <span class="tok-str">&quot;\x1b[?2027h&quot;</span>;</span>
<span class="line" id="L23"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> unicode_reset = <span class="tok-str">&quot;\x1b[?2027l&quot;</span>;</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"><span class="tok-comment">// bracketed paste</span>
</span>
<span class="line" id="L26"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bp_set = <span class="tok-str">&quot;\x1b[?2004h&quot;</span>;</span>
<span class="line" id="L27"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bp_reset = <span class="tok-str">&quot;\x1b[?2004l&quot;</span>;</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"><span class="tok-comment">// Key encoding</span>
</span>
<span class="line" id="L30"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> csi_u_push = <span class="tok-str">&quot;\x1b[&gt;{d}u&quot;</span>;</span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> csi_u_pop = <span class="tok-str">&quot;\x1b[&lt;u&quot;</span>;</span>
<span class="line" id="L32"></span>
<span class="line" id="L33"><span class="tok-comment">// Cursor</span>
</span>
<span class="line" id="L34"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> home = <span class="tok-str">&quot;\x1b[H&quot;</span>;</span>
<span class="line" id="L35"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> cup = <span class="tok-str">&quot;\x1b[{d};{d}H&quot;</span>;</span>
<span class="line" id="L36"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> hide_cursor = <span class="tok-str">&quot;\x1b[?25l&quot;</span>;</span>
<span class="line" id="L37"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> show_cursor = <span class="tok-str">&quot;\x1b[?25h&quot;</span>;</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"><span class="tok-comment">// alt screen</span>
</span>
<span class="line" id="L40"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> smcup = <span class="tok-str">&quot;\x1b[?1049h&quot;</span>;</span>
<span class="line" id="L41"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> rmcup = <span class="tok-str">&quot;\x1b[?1049l&quot;</span>;</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"><span class="tok-comment">// sgr reset all</span>
</span>
<span class="line" id="L44"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> sgr_reset = <span class="tok-str">&quot;\x1b[m&quot;</span>;</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"><span class="tok-comment">// colors</span>
</span>
<span class="line" id="L47"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> fg_base = <span class="tok-str">&quot;\x1b[3{d}m&quot;</span>;</span>
<span class="line" id="L48"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> fg_bright = <span class="tok-str">&quot;\x1b[9{d}m&quot;</span>;</span>
<span class="line" id="L49"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bg_base = <span class="tok-str">&quot;\x1b[4{d}m&quot;</span>;</span>
<span class="line" id="L50"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bg_bright = <span class="tok-str">&quot;\x1b[10{d}m&quot;</span>;</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> fg_reset = <span class="tok-str">&quot;\x1b[39m&quot;</span>;</span>
<span class="line" id="L53"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bg_reset = <span class="tok-str">&quot;\x1b[49m&quot;</span>;</span>
<span class="line" id="L54"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_reset = <span class="tok-str">&quot;\x1b[59m&quot;</span>;</span>
<span class="line" id="L55"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> fg_indexed = <span class="tok-str">&quot;\x1b[38:5:{d}m&quot;</span>;</span>
<span class="line" id="L56"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bg_indexed = <span class="tok-str">&quot;\x1b[48:5:{d}m&quot;</span>;</span>
<span class="line" id="L57"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_indexed = <span class="tok-str">&quot;\x1b[58:5:{d}m&quot;</span>;</span>
<span class="line" id="L58"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> fg_rgb = <span class="tok-str">&quot;\x1b[38:2:{d}:{d}:{d}m&quot;</span>;</span>
<span class="line" id="L59"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bg_rgb = <span class="tok-str">&quot;\x1b[48:2:{d}:{d}:{d}m&quot;</span>;</span>
<span class="line" id="L60"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_rgb = <span class="tok-str">&quot;\x1b[58:2:{d}:{d}:{d}m&quot;</span>;</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"><span class="tok-comment">// Underlines</span>
</span>
<span class="line" id="L63"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_off = <span class="tok-str">&quot;\x1b[24m&quot;</span>; <span class="tok-comment">// NOTE: this could be \x1b[4:0m but is not as widely supported</span>
</span>
<span class="line" id="L64"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_single = <span class="tok-str">&quot;\x1b[4m&quot;</span>;</span>
<span class="line" id="L65"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_double = <span class="tok-str">&quot;\x1b[4:2m&quot;</span>;</span>
<span class="line" id="L66"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_curly = <span class="tok-str">&quot;\x1b[4:3m&quot;</span>;</span>
<span class="line" id="L67"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_dotted = <span class="tok-str">&quot;\x1b[4:4m&quot;</span>;</span>
<span class="line" id="L68"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ul_dashed = <span class="tok-str">&quot;\x1b[4:5m&quot;</span>;</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"><span class="tok-comment">// Attributes</span>
</span>
<span class="line" id="L71"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bold_set = <span class="tok-str">&quot;\x1b[1m&quot;</span>;</span>
<span class="line" id="L72"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> dim_set = <span class="tok-str">&quot;\x1b[2m&quot;</span>;</span>
<span class="line" id="L73"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> italic_set = <span class="tok-str">&quot;\x1b[3m&quot;</span>;</span>
<span class="line" id="L74"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> blink_set = <span class="tok-str">&quot;\x1b[5m&quot;</span>;</span>
<span class="line" id="L75"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> reverse_set = <span class="tok-str">&quot;\x1b[7m&quot;</span>;</span>
<span class="line" id="L76"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> invisible_set = <span class="tok-str">&quot;\x1b[8m&quot;</span>;</span>
<span class="line" id="L77"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> strikethrough_set = <span class="tok-str">&quot;\x1b[9m&quot;</span>;</span>
<span class="line" id="L78"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bold_dim_reset = <span class="tok-str">&quot;\x1b[22m&quot;</span>;</span>
<span class="line" id="L79"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> italic_reset = <span class="tok-str">&quot;\x1b[23m&quot;</span>;</span>
<span class="line" id="L80"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> blink_reset = <span class="tok-str">&quot;\x1b[25m&quot;</span>;</span>
<span class="line" id="L81"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> reverse_reset = <span class="tok-str">&quot;\x1b[27m&quot;</span>;</span>
<span class="line" id="L82"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> invisible_reset = <span class="tok-str">&quot;\x1b[28m&quot;</span>;</span>
<span class="line" id="L83"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> strikethrough_reset = <span class="tok-str">&quot;\x1b[29m&quot;</span>;</span>
<span class="line" id="L84"></span>
<span class="line" id="L85"><span class="tok-comment">// OSC sequences</span>
</span>
<span class="line" id="L86"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> osc2_set_title = <span class="tok-str">&quot;\x1b]2;{s}\x1b\\&quot;</span>;</span>
<span class="line" id="L87"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> osc8 = <span class="tok-str">&quot;\x1b]8;{s};{s}\x1b\\&quot;</span>;</span>
<span class="line" id="L88"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> osc8_clear = <span class="tok-str">&quot;\x1b]8;;\x1b\\&quot;</span>;</span>
<span class="line" id="L89"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> osc9_notify = <span class="tok-str">&quot;\x1b]9;{s}\x1b\\&quot;</span>;</span>
<span class="line" id="L90"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> osc777_notify = <span class="tok-str">&quot;\x1b]777;notify;{s};{s}\x1b\\&quot;</span>;</span>
<span class="line" id="L91"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> osc22_mouse_shape = <span class="tok-str">&quot;\x1b]22;{s}\x1b\\&quot;</span>;</span>
<span class="line" id="L92"></span>
<span class="line" id="L93"><span class="tok-comment">// Kitty graphics</span>
</span>
<span class="line" id="L94"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kitty_graphics_clear = <span class="tok-str">&quot;\x1b_Ga=d\x1b\\&quot;</span>;</span>
<span class="line" id="L95"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kitty_graphics_place = <span class="tok-str">&quot;\x1b_Ga=p,i={d},z={d},C=1\x1b\\&quot;</span>;</span>
<span class="line" id="L96"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> kitty_graphics_scale = <span class="tok-str">&quot;\x1b_Ga=p,i={d},z={d},c={d},r={d},C=1\x1b\\&quot;</span>;</span>
<span class="line" id="L97"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Key = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Key.zig&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Mouse = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Mouse.zig&quot;</span>);</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-comment">/// The events that Vaxis emits internally</span></span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Event = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L6"> key_press: Key,</span>
<span class="line" id="L7"> mouse: Mouse,</span>
<span class="line" id="L8"> focus_in,</span>
<span class="line" id="L9"> focus_out,</span>
<span class="line" id="L10"> paste_start,</span>
<span class="line" id="L11"> paste_end,</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"> <span class="tok-comment">// these are delivered as discovered terminal capabilities</span>
</span>
<span class="line" id="L14"> cap_kitty_keyboard,</span>
<span class="line" id="L15"> cap_kitty_graphics,</span>
<span class="line" id="L16"> cap_rgb,</span>
<span class="line" id="L17"> cap_unicode,</span>
<span class="line" id="L18"> cap_da1,</span>
<span class="line" id="L19">};</span>
<span class="line" id="L20"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> unicode = std.unicode;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> testing = std.testing;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> ziglyph = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph&quot;</span>);</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-comment">/// the method to use when calculating the width of a grapheme</span></span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Method = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L8"> unicode,</span>
<span class="line" id="L9"> wcwidth,</span>
<span class="line" id="L10"> no_zwj,</span>
<span class="line" id="L11">};</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-comment">/// returns the width of the provided string, as measured by the method chosen</span></span>
<span class="line" id="L14"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">gwidth</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, method: Method) !<span class="tok-type">usize</span> {</span>
<span class="line" id="L15"> <span class="tok-kw">switch</span> (method) {</span>
<span class="line" id="L16"> .unicode =&gt; {</span>
<span class="line" id="L17"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> ziglyph.display_width.strWidth(str, .half);</span>
<span class="line" id="L18"> },</span>
<span class="line" id="L19"> .wcwidth =&gt; {</span>
<span class="line" id="L20"> <span class="tok-kw">var</span> total: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L21"> <span class="tok-kw">const</span> utf8 = <span class="tok-kw">try</span> unicode.Utf8View.init(str);</span>
<span class="line" id="L22"> <span class="tok-kw">var</span> iter = utf8.iterator();</span>
<span class="line" id="L23"></span>
<span class="line" id="L24"> <span class="tok-kw">while</span> (iter.nextCodepoint()) |cp| {</span>
<span class="line" id="L25"> <span class="tok-kw">const</span> w = ziglyph.display_width.codePointWidth(cp, .half);</span>
<span class="line" id="L26"> <span class="tok-kw">if</span> (w &lt; <span class="tok-number">0</span>) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L27"> total += <span class="tok-builtin">@intCast</span>(w);</span>
<span class="line" id="L28"> }</span>
<span class="line" id="L29"> <span class="tok-kw">return</span> total;</span>
<span class="line" id="L30"> },</span>
<span class="line" id="L31"> .no_zwj =&gt; {</span>
<span class="line" id="L32"> <span class="tok-kw">var</span> out: [<span class="tok-number">256</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L33"> <span class="tok-kw">if</span> (str.len &gt; out.len) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.OutOfMemory;</span>
<span class="line" id="L34"> <span class="tok-kw">const</span> n = std.mem.replace(<span class="tok-type">u8</span>, str, <span class="tok-str">&quot;\u{200D}&quot;</span>, <span class="tok-str">&quot;&quot;</span>, &amp;out);</span>
<span class="line" id="L35"> <span class="tok-kw">return</span> gwidth(out[<span class="tok-number">0</span>..n], .unicode);</span>
<span class="line" id="L36"> },</span>
<span class="line" id="L37"> }</span>
<span class="line" id="L38">}</span>
<span class="line" id="L39"></span>
<span class="line" id="L40"><span class="tok-kw">test</span> <span class="tok-str">&quot;gwidth: a&quot;</span> {</span>
<span class="line" id="L41"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">1</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;a&quot;</span>, .unicode));</span>
<span class="line" id="L42"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">1</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;a&quot;</span>, .wcwidth));</span>
<span class="line" id="L43"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">1</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;a&quot;</span>, .no_zwj));</span>
<span class="line" id="L44">}</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"><span class="tok-kw">test</span> <span class="tok-str">&quot;gwidth: emoji with ZWJ&quot;</span> {</span>
<span class="line" id="L47"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">2</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;👩‍🚀&quot;</span>, .unicode));</span>
<span class="line" id="L48"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">4</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;👩‍🚀&quot;</span>, .wcwidth));</span>
<span class="line" id="L49"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">4</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;👩‍🚀&quot;</span>, .no_zwj));</span>
<span class="line" id="L50">}</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"><span class="tok-kw">test</span> <span class="tok-str">&quot;gwidth: emoji with VS16 selector&quot;</span> {</span>
<span class="line" id="L53"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">2</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;\xE2\x9D\xA4\xEF\xB8\x8F&quot;</span>, .unicode));</span>
<span class="line" id="L54"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">1</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;\xE2\x9D\xA4\xEF\xB8\x8F&quot;</span>, .wcwidth));</span>
<span class="line" id="L55"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">2</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;\xE2\x9D\xA4\xEF\xB8\x8F&quot;</span>, .no_zwj));</span>
<span class="line" id="L56">}</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"><span class="tok-kw">test</span> <span class="tok-str">&quot;gwidth: emoji with skin tone selector&quot;</span> {</span>
<span class="line" id="L59"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">2</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;👋🏿&quot;</span>, .unicode));</span>
<span class="line" id="L60"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">4</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;👋🏿&quot;</span>, .wcwidth));</span>
<span class="line" id="L61"> <span class="tok-kw">try</span> testing.expectEqual(<span class="tok-number">2</span>, <span class="tok-kw">try</span> gwidth(<span class="tok-str">&quot;👋🏿&quot;</span>, .no_zwj));</span>
<span class="line" id="L62">}</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"><span class="tok-kw">test</span> <span class="tok-str">&quot;gwidth: invalid string&quot;</span> {</span>
<span class="line" id="L65"> <span class="tok-kw">try</span> testing.expectError(<span class="tok-kw">error</span>.InvalidUtf8, gwidth(<span class="tok-str">&quot;\xc3\x28&quot;</span>, .unicode));</span>
<span class="line" id="L66"> <span class="tok-kw">try</span> testing.expectError(<span class="tok-kw">error</span>.InvalidUtf8, gwidth(<span class="tok-str">&quot;\xc3\x28&quot;</span>, .wcwidth));</span>
<span class="line" id="L67"> <span class="tok-kw">try</span> testing.expectError(<span class="tok-kw">error</span>.InvalidUtf8, gwidth(<span class="tok-str">&quot;\xc3\x28&quot;</span>, .no_zwj));</span>
<span class="line" id="L68">}</span>
<span class="line" id="L69"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Vaxis = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;vaxis.zig&quot;</span>).Vaxis;</span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Options = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Options.zig&quot;</span>);</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Key = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Key.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Cell = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Style = Cell.Style;</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Image.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Mouse = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Mouse.zig&quot;</span>);</span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Winsize = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Tty.zig&quot;</span>).Winsize;</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> widgets = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;widgets.zig&quot;</span>);</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-comment">/// Initialize a Vaxis application.</span></span>
<span class="line" id="L16"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(<span class="tok-kw">comptime</span> Event: <span class="tok-type">type</span>, opts: Options) !Vaxis(Event) {</span>
<span class="line" id="L17"> <span class="tok-kw">return</span> Vaxis(Event).init(opts);</span>
<span class="line" id="L18">}</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-kw">test</span> {</span>
<span class="line" id="L21"> std.testing.refAllDecls(<span class="tok-builtin">@This</span>());</span>
<span class="line" id="L22">}</span>
<span class="line" id="L23"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> assert = std.debug.assert;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> atomic = std.atomic;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Futex = std.Thread.Futex;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> log = std.log.scoped(.queue);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-comment">/// Thread safe. Fixed size. Blocking push and pop.</span></span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">Queue</span>(</span>
<span class="line" id="L10"> <span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>,</span>
<span class="line" id="L11"> <span class="tok-kw">comptime</span> size: <span class="tok-type">usize</span>,</span>
<span class="line" id="L12">) <span class="tok-type">type</span> {</span>
<span class="line" id="L13"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L14"> buf: [size]T = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"> read_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L17"> write_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"> mutex: std.Thread.Mutex = .{},</span>
<span class="line" id="L20"> <span class="tok-comment">// blocks when the buffer is full or empty</span>
</span>
<span class="line" id="L21"> futex: atomic.Value(<span class="tok-type">u32</span>) = atomic.Value(<span class="tok-type">u32</span>).init(<span class="tok-number">0</span>),</span>
<span class="line" id="L22"></span>
<span class="line" id="L23"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"> <span class="tok-comment">/// pop an item from the queue. Blocks until an item is available</span></span>
<span class="line" id="L26"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pop</span>(self: *Self) T {</span>
<span class="line" id="L27"> self.mutex.lock();</span>
<span class="line" id="L28"> <span class="tok-kw">defer</span> self.mutex.unlock();</span>
<span class="line" id="L29"> <span class="tok-kw">if</span> (self.isEmpty()) {</span>
<span class="line" id="L30"> <span class="tok-comment">// If we don't have any items, we unlock and wait</span>
</span>
<span class="line" id="L31"> self.mutex.unlock();</span>
<span class="line" id="L32"> Futex.wait(&amp;self.futex, <span class="tok-number">0</span>);</span>
<span class="line" id="L33"> <span class="tok-comment">// regain our lock</span>
</span>
<span class="line" id="L34"> self.mutex.lock();</span>
<span class="line" id="L35"> }</span>
<span class="line" id="L36"> <span class="tok-kw">if</span> (self.isFull()) {</span>
<span class="line" id="L37"> <span class="tok-comment">// If we are full, wake up the push</span>
</span>
<span class="line" id="L38"> Futex.wake(&amp;self.futex, <span class="tok-number">1</span>);</span>
<span class="line" id="L39"> }</span>
<span class="line" id="L40"> <span class="tok-kw">const</span> i = self.read_index;</span>
<span class="line" id="L41"> self.read_index += <span class="tok-number">1</span>;</span>
<span class="line" id="L42"> self.read_index = self.read_index % self.buf.len;</span>
<span class="line" id="L43"> <span class="tok-kw">return</span> self.buf[i];</span>
<span class="line" id="L44"> }</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> <span class="tok-comment">/// push an item into the queue. Blocks until the item has been put in</span></span>
<span class="line" id="L47"> <span class="tok-comment">/// the queue</span></span>
<span class="line" id="L48"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">push</span>(self: *Self, item: T) <span class="tok-type">void</span> {</span>
<span class="line" id="L49"> self.mutex.lock();</span>
<span class="line" id="L50"> <span class="tok-kw">defer</span> self.mutex.unlock();</span>
<span class="line" id="L51"> <span class="tok-kw">if</span> (self.isFull()) {</span>
<span class="line" id="L52"> self.mutex.unlock();</span>
<span class="line" id="L53"> Futex.wait(&amp;self.futex, <span class="tok-number">0</span>);</span>
<span class="line" id="L54"> self.mutex.lock();</span>
<span class="line" id="L55"> }</span>
<span class="line" id="L56"> <span class="tok-kw">if</span> (self.isEmpty()) {</span>
<span class="line" id="L57"> Futex.wake(&amp;self.futex, <span class="tok-number">1</span>);</span>
<span class="line" id="L58"> }</span>
<span class="line" id="L59"> <span class="tok-kw">const</span> i = self.write_index;</span>
<span class="line" id="L60"> self.write_index += <span class="tok-number">1</span>;</span>
<span class="line" id="L61"> self.write_index = self.write_index % self.buf.len;</span>
<span class="line" id="L62"> self.buf[i] = item;</span>
<span class="line" id="L63"> }</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> <span class="tok-comment">/// push an item into the queue. Returns true when the item was</span></span>
<span class="line" id="L66"> <span class="tok-comment">/// successfully placed in the queue</span></span>
<span class="line" id="L67"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">tryPush</span>(self: *Self, item: T) <span class="tok-type">bool</span> {</span>
<span class="line" id="L68"> self.mutex.lock();</span>
<span class="line" id="L69"> <span class="tok-kw">if</span> (self.isFull()) {</span>
<span class="line" id="L70"> self.mutex.unlock();</span>
<span class="line" id="L71"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73"> self.mutex.unlock();</span>
<span class="line" id="L74"> self.push(item);</span>
<span class="line" id="L75"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L76"> }</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"> <span class="tok-comment">/// pop an item from the queue. Returns null when no item is available</span></span>
<span class="line" id="L79"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">tryPop</span>(self: *Self) ?T {</span>
<span class="line" id="L80"> self.mutex.lock();</span>
<span class="line" id="L81"> <span class="tok-kw">if</span> (self.isEmpty()) {</span>
<span class="line" id="L82"> self.mutex.unlock();</span>
<span class="line" id="L83"> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L84"> }</span>
<span class="line" id="L85"> self.mutex.unlock();</span>
<span class="line" id="L86"> <span class="tok-kw">return</span> self.pop();</span>
<span class="line" id="L87"> }</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"> <span class="tok-comment">/// Returns `true` if the ring buffer is empty and `false` otherwise.</span></span>
<span class="line" id="L90"> <span class="tok-kw">fn</span> <span class="tok-fn">isEmpty</span>(self: Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L91"> <span class="tok-kw">return</span> self.write_index == self.read_index;</span>
<span class="line" id="L92"> }</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"> <span class="tok-comment">/// Returns `true` if the ring buffer is full and `false` otherwise.</span></span>
<span class="line" id="L95"> <span class="tok-kw">fn</span> <span class="tok-fn">isFull</span>(self: Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L96"> <span class="tok-kw">return</span> self.mask2(self.write_index + self.buf.len) == self.read_index;</span>
<span class="line" id="L97"> }</span>
<span class="line" id="L98"></span>
<span class="line" id="L99"> <span class="tok-comment">/// Returns the length</span></span>
<span class="line" id="L100"> <span class="tok-kw">fn</span> <span class="tok-fn">len</span>(self: Self) <span class="tok-type">usize</span> {</span>
<span class="line" id="L101"> <span class="tok-kw">const</span> wrap_offset = <span class="tok-number">2</span> * self.buf.len * <span class="tok-builtin">@intFromBool</span>(self.write_index &lt; self.read_index);</span>
<span class="line" id="L102"> <span class="tok-kw">const</span> adjusted_write_index = self.write_index + wrap_offset;</span>
<span class="line" id="L103"> <span class="tok-kw">return</span> adjusted_write_index - self.read_index;</span>
<span class="line" id="L104"> }</span>
<span class="line" id="L105"></span>
<span class="line" id="L106"> <span class="tok-comment">/// Returns `index` modulo the length of the backing slice.</span></span>
<span class="line" id="L107"> <span class="tok-kw">fn</span> <span class="tok-fn">mask</span>(self: Self, index: <span class="tok-type">usize</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L108"> <span class="tok-kw">return</span> index % self.buf.len;</span>
<span class="line" id="L109"> }</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"> <span class="tok-comment">/// Returns `index` modulo twice the length of the backing slice.</span></span>
<span class="line" id="L112"> <span class="tok-kw">fn</span> <span class="tok-fn">mask2</span>(self: Self, index: <span class="tok-type">usize</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L113"> <span class="tok-kw">return</span> index % (<span class="tok-number">2</span> * self.buf.len);</span>
<span class="line" id="L114"> }</span>
<span class="line" id="L115"> };</span>
<span class="line" id="L116">}</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"><span class="tok-kw">test</span> <span class="tok-str">&quot;Queue: simple push / pop&quot;</span> {</span>
<span class="line" id="L119"> <span class="tok-kw">var</span> queue: Queue(<span class="tok-type">u8</span>, <span class="tok-number">16</span>) = .{};</span>
<span class="line" id="L120"> queue.push(<span class="tok-number">1</span>);</span>
<span class="line" id="L121"> <span class="tok-kw">const</span> pop = queue.pop();</span>
<span class="line" id="L122"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-number">1</span>, pop);</span>
<span class="line" id="L123">}</span>
<span class="line" id="L124"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> atomic = std.atomic;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> base64 = std.base64.standard.Encoder;</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> Queue = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;queue.zig&quot;</span>).Queue;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> ctlseqs = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ctlseqs.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> Tty = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Tty.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> Winsize = Tty.Winsize;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> Key = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Key.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> Screen = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Screen.zig&quot;</span>);</span>
<span class="line" id="L11"><span class="tok-kw">const</span> InternalScreen = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;InternalScreen.zig&quot;</span>);</span>
<span class="line" id="L12"><span class="tok-kw">const</span> Window = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Window.zig&quot;</span>);</span>
<span class="line" id="L13"><span class="tok-kw">const</span> Options = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Options.zig&quot;</span>);</span>
<span class="line" id="L14"><span class="tok-kw">const</span> Style = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>).Style;</span>
<span class="line" id="L15"><span class="tok-kw">const</span> Hyperlink = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Cell.zig&quot;</span>).Hyperlink;</span>
<span class="line" id="L16"><span class="tok-kw">const</span> gwidth = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;gwidth.zig&quot;</span>);</span>
<span class="line" id="L17"><span class="tok-kw">const</span> Shape = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Mouse.zig&quot;</span>).Shape;</span>
<span class="line" id="L18"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Image.zig&quot;</span>);</span>
<span class="line" id="L19"><span class="tok-kw">const</span> zigimg = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;zigimg&quot;</span>);</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-comment">/// Vaxis is the entrypoint for a Vaxis application. The provided type T should</span></span>
<span class="line" id="L22"><span class="tok-comment">/// be a tagged union which contains all of the events the application will</span></span>
<span class="line" id="L23"><span class="tok-comment">/// handle. Vaxis will look for the following fields on the union and, if</span></span>
<span class="line" id="L24"><span class="tok-comment">/// found, emit them via the &quot;nextEvent&quot; method</span></span>
<span class="line" id="L25"><span class="tok-comment">///</span></span>
<span class="line" id="L26"><span class="tok-comment">/// The following events are available:</span></span>
<span class="line" id="L27"><span class="tok-comment">/// - `key_press: Key`, for key press events</span></span>
<span class="line" id="L28"><span class="tok-comment">/// - `winsize: Winsize`, for resize events. Must call app.resize when receiving</span></span>
<span class="line" id="L29"><span class="tok-comment">/// this event</span></span>
<span class="line" id="L30"><span class="tok-comment">/// - `focus_in` and `focus_out` for focus events</span></span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">Vaxis</span>(<span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L32"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L33"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"> <span class="tok-kw">const</span> log = std.log.scoped(.vaxis);</span>
<span class="line" id="L36"></span>
<span class="line" id="L37"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Event = T;</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Capabilities = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L40"> kitty_keyboard: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L41"> kitty_graphics: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L42"> rgb: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L43"> unicode: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L44"> };</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> <span class="tok-comment">/// the event queue for Vaxis</span></span>
<span class="line" id="L47"> <span class="tok-comment">//</span>
</span>
<span class="line" id="L48"> <span class="tok-comment">// TODO: is 512 ok?</span>
</span>
<span class="line" id="L49"> queue: Queue(T, <span class="tok-number">512</span>),</span>
<span class="line" id="L50"></span>
<span class="line" id="L51"> tty: ?Tty,</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"> <span class="tok-comment">/// the screen we write to</span></span>
<span class="line" id="L54"> screen: Screen,</span>
<span class="line" id="L55"> <span class="tok-comment">/// The last screen we drew. We keep this so we can efficiently update on</span></span>
<span class="line" id="L56"> <span class="tok-comment">/// the next render</span></span>
<span class="line" id="L57"> screen_last: InternalScreen = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L58"></span>
<span class="line" id="L59"> state: <span class="tok-kw">struct</span> {</span>
<span class="line" id="L60"> <span class="tok-comment">/// if we are in the alt screen</span></span>
<span class="line" id="L61"> alt_screen: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L62"> <span class="tok-comment">/// if we have entered kitty keyboard</span></span>
<span class="line" id="L63"> kitty_keyboard: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L64"> bracketed_paste: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L65"> mouse: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L66"> } = .{},</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> caps: Capabilities = .{},</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-comment">/// if we should redraw the entire screen on the next render</span></span>
<span class="line" id="L71"> refresh: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L72"></span>
<span class="line" id="L73"> <span class="tok-comment">/// blocks the main thread until a DA1 query has been received, or the</span></span>
<span class="line" id="L74"> <span class="tok-comment">/// futex times out</span></span>
<span class="line" id="L75"> query_futex: atomic.Value(<span class="tok-type">u32</span>) = atomic.Value(<span class="tok-type">u32</span>).init(<span class="tok-number">0</span>),</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-comment">// images</span>
</span>
<span class="line" id="L78"> next_img_id: <span class="tok-type">u32</span> = <span class="tok-number">1</span>,</span>
<span class="line" id="L79"></span>
<span class="line" id="L80"> <span class="tok-comment">// statistics</span>
</span>
<span class="line" id="L81"> renders: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L82"> render_dur: <span class="tok-type">i128</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L83"></span>
<span class="line" id="L84"> <span class="tok-comment">/// Initialize Vaxis with runtime options</span></span>
<span class="line" id="L85"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(_: Options) !Self {</span>
<span class="line" id="L86"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L87"> .queue = .{},</span>
<span class="line" id="L88"> .tty = <span class="tok-null">null</span>,</span>
<span class="line" id="L89"> .screen = .{},</span>
<span class="line" id="L90"> .screen_last = .{},</span>
<span class="line" id="L91"> };</span>
<span class="line" id="L92"> }</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"> <span class="tok-comment">/// Resets the terminal to it's original state. If an allocator is</span></span>
<span class="line" id="L95"> <span class="tok-comment">/// passed, this will free resources associated with Vaxis. This is left as an</span></span>
<span class="line" id="L96"> <span class="tok-comment">/// optional so applications can choose to not free resources when the</span></span>
<span class="line" id="L97"> <span class="tok-comment">/// application will be exiting anyways</span></span>
<span class="line" id="L98"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self, alloc: ?std.mem.Allocator) <span class="tok-type">void</span> {</span>
<span class="line" id="L99"> <span class="tok-kw">if</span> (self.tty) |_| {</span>
<span class="line" id="L100"> <span class="tok-kw">var</span> tty = &amp;self.tty.?;</span>
<span class="line" id="L101"> <span class="tok-kw">if</span> (self.state.kitty_keyboard) {</span>
<span class="line" id="L102"> _ = tty.write(ctlseqs.csi_u_pop) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L103"> }</span>
<span class="line" id="L104"> <span class="tok-kw">if</span> (self.state.mouse) {</span>
<span class="line" id="L105"> _ = tty.write(ctlseqs.mouse_reset) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L106"> }</span>
<span class="line" id="L107"> <span class="tok-kw">if</span> (self.state.bracketed_paste) {</span>
<span class="line" id="L108"> _ = tty.write(ctlseqs.bp_reset) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L109"> }</span>
<span class="line" id="L110"> <span class="tok-kw">if</span> (self.state.alt_screen) {</span>
<span class="line" id="L111"> _ = tty.write(ctlseqs.rmcup) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L112"> }</span>
<span class="line" id="L113"> tty.flush() <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L114"> tty.deinit();</span>
<span class="line" id="L115"> }</span>
<span class="line" id="L116"> <span class="tok-kw">if</span> (alloc) |a| {</span>
<span class="line" id="L117"> self.screen.deinit(a);</span>
<span class="line" id="L118"> self.screen_last.deinit(a);</span>
<span class="line" id="L119"> }</span>
<span class="line" id="L120"> <span class="tok-kw">if</span> (self.renders &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L121"> <span class="tok-kw">const</span> tpr = <span class="tok-builtin">@divTrunc</span>(self.render_dur, self.renders);</span>
<span class="line" id="L122"> log.info(<span class="tok-str">&quot;total renders = {d}&quot;</span>, .{self.renders});</span>
<span class="line" id="L123"> log.info(<span class="tok-str">&quot;microseconds per render = {d}&quot;</span>, .{tpr});</span>
<span class="line" id="L124"> }</span>
<span class="line" id="L125"> }</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"> <span class="tok-comment">/// spawns the input thread to start listening to the tty for input</span></span>
<span class="line" id="L128"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">startReadThread</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L129"> self.tty = <span class="tok-kw">try</span> Tty.init();</span>
<span class="line" id="L130"> <span class="tok-comment">// run our tty read loop in it's own thread</span>
</span>
<span class="line" id="L131"> <span class="tok-kw">const</span> read_thread = <span class="tok-kw">try</span> std.Thread.spawn(.{}, Tty.run, .{ &amp;self.tty.?, T, self });</span>
<span class="line" id="L132"> <span class="tok-kw">try</span> read_thread.setName(<span class="tok-str">&quot;tty&quot;</span>);</span>
<span class="line" id="L133"> }</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"> <span class="tok-comment">/// stops reading from the tty</span></span>
<span class="line" id="L136"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">stopReadThread</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L137"> <span class="tok-kw">if</span> (self.tty) |_| {</span>
<span class="line" id="L138"> <span class="tok-kw">var</span> tty = &amp;self.tty.?;</span>
<span class="line" id="L139"> tty.stop();</span>
<span class="line" id="L140"> }</span>
<span class="line" id="L141"> }</span>
<span class="line" id="L142"></span>
<span class="line" id="L143"> <span class="tok-comment">/// returns the next available event, blocking until one is available</span></span>
<span class="line" id="L144"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">nextEvent</span>(self: *Self) T {</span>
<span class="line" id="L145"> <span class="tok-kw">return</span> self.queue.pop();</span>
<span class="line" id="L146"> }</span>
<span class="line" id="L147"></span>
<span class="line" id="L148"> <span class="tok-comment">/// posts an event into the event queue. Will block if there is not</span></span>
<span class="line" id="L149"> <span class="tok-comment">/// capacity for the event</span></span>
<span class="line" id="L150"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">postEvent</span>(self: *Self, event: T) <span class="tok-type">void</span> {</span>
<span class="line" id="L151"> self.queue.push(event);</span>
<span class="line" id="L152"> }</span>
<span class="line" id="L153"></span>
<span class="line" id="L154"> <span class="tok-comment">/// resize allocates a slice of cells equal to the number of cells</span></span>
<span class="line" id="L155"> <span class="tok-comment">/// required to display the screen (ie width x height). Any previous screen is</span></span>
<span class="line" id="L156"> <span class="tok-comment">/// freed when resizing</span></span>
<span class="line" id="L157"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">resize</span>(self: *Self, alloc: std.mem.Allocator, winsize: Winsize) !<span class="tok-type">void</span> {</span>
<span class="line" id="L158"> log.debug(<span class="tok-str">&quot;resizing screen: width={d} height={d}&quot;</span>, .{ winsize.cols, winsize.rows });</span>
<span class="line" id="L159"> self.screen.deinit(alloc);</span>
<span class="line" id="L160"> self.screen = <span class="tok-kw">try</span> Screen.init(alloc, winsize);</span>
<span class="line" id="L161"> self.screen.unicode = self.caps.unicode;</span>
<span class="line" id="L162"> <span class="tok-comment">// try self.screen.int(alloc, winsize.cols, winsize.rows);</span>
</span>
<span class="line" id="L163"> <span class="tok-comment">// we only init our current screen. This has the effect of redrawing</span>
</span>
<span class="line" id="L164"> <span class="tok-comment">// every cell</span>
</span>
<span class="line" id="L165"> self.screen_last.deinit(alloc);</span>
<span class="line" id="L166"> self.screen_last = <span class="tok-kw">try</span> InternalScreen.init(alloc, winsize.cols, winsize.rows);</span>
<span class="line" id="L167"> <span class="tok-comment">// try self.screen_last.resize(alloc, winsize.cols, winsize.rows);</span>
</span>
<span class="line" id="L168"> }</span>
<span class="line" id="L169"></span>
<span class="line" id="L170"> <span class="tok-comment">/// returns a Window comprising of the entire terminal screen</span></span>
<span class="line" id="L171"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">window</span>(self: *Self) Window {</span>
<span class="line" id="L172"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L173"> .x_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L174"> .y_off = <span class="tok-number">0</span>,</span>
<span class="line" id="L175"> .width = self.screen.width,</span>
<span class="line" id="L176"> .height = self.screen.height,</span>
<span class="line" id="L177"> .screen = &amp;self.screen,</span>
<span class="line" id="L178"> };</span>
<span class="line" id="L179"> }</span>
<span class="line" id="L180"></span>
<span class="line" id="L181"> <span class="tok-comment">/// enter the alternate screen. The alternate screen will automatically</span></span>
<span class="line" id="L182"> <span class="tok-comment">/// be exited if calling deinit while in the alt screen</span></span>
<span class="line" id="L183"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">enterAltScreen</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L184"> <span class="tok-kw">if</span> (self.state.alt_screen) <span class="tok-kw">return</span>;</span>
<span class="line" id="L185"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span>;</span>
<span class="line" id="L186"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.smcup);</span>
<span class="line" id="L187"> <span class="tok-kw">try</span> tty.flush();</span>
<span class="line" id="L188"> self.state.alt_screen = <span class="tok-null">true</span>;</span>
<span class="line" id="L189"> }</span>
<span class="line" id="L190"></span>
<span class="line" id="L191"> <span class="tok-comment">/// exit the alternate screen</span></span>
<span class="line" id="L192"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">exitAltScreen</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L193"> <span class="tok-kw">if</span> (!self.state.alt_screen) <span class="tok-kw">return</span>;</span>
<span class="line" id="L194"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span>;</span>
<span class="line" id="L195"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.rmcup);</span>
<span class="line" id="L196"> <span class="tok-kw">try</span> tty.flush();</span>
<span class="line" id="L197"> self.state.alt_screen = <span class="tok-null">false</span>;</span>
<span class="line" id="L198"> }</span>
<span class="line" id="L199"></span>
<span class="line" id="L200"> <span class="tok-comment">/// write queries to the terminal to determine capabilities. Individual</span></span>
<span class="line" id="L201"> <span class="tok-comment">/// capabilities will be delivered to the client and possibly intercepted by</span></span>
<span class="line" id="L202"> <span class="tok-comment">/// Vaxis to enable features</span></span>
<span class="line" id="L203"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">queryTerminal</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L204"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span>;</span>
<span class="line" id="L205"></span>
<span class="line" id="L206"> <span class="tok-kw">const</span> colorterm = std.os.getenv(<span class="tok-str">&quot;COLORTERM&quot;</span>) <span class="tok-kw">orelse</span> <span class="tok-str">&quot;&quot;</span>;</span>
<span class="line" id="L207"> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, colorterm, <span class="tok-str">&quot;truecolor&quot;</span>) <span class="tok-kw">or</span></span>
<span class="line" id="L208"> std.mem.eql(<span class="tok-type">u8</span>, colorterm, <span class="tok-str">&quot;24bit&quot;</span>))</span>
<span class="line" id="L209"> {</span>
<span class="line" id="L210"> <span class="tok-kw">if</span> (<span class="tok-builtin">@hasField</span>(Event, <span class="tok-str">&quot;cap_rgb&quot;</span>)) {</span>
<span class="line" id="L211"> self.postEvent(.cap_rgb);</span>
<span class="line" id="L212"> }</span>
<span class="line" id="L213"> }</span>
<span class="line" id="L214"></span>
<span class="line" id="L215"> <span class="tok-comment">// TODO: decide if we actually want to query for focus and sync. It</span>
</span>
<span class="line" id="L216"> <span class="tok-comment">// doesn't hurt to blindly use them</span>
</span>
<span class="line" id="L217"> <span class="tok-comment">// _ = try tty.write(ctlseqs.decrqm_focus);</span>
</span>
<span class="line" id="L218"> <span class="tok-comment">// _ = try tty.write(ctlseqs.decrqm_sync);</span>
</span>
<span class="line" id="L219"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.decrqm_unicode);</span>
<span class="line" id="L220"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.decrqm_color_theme);</span>
<span class="line" id="L221"> <span class="tok-comment">// TODO: XTVERSION has a DCS response. uncomment when we can parse</span>
</span>
<span class="line" id="L222"> <span class="tok-comment">// that</span>
</span>
<span class="line" id="L223"> <span class="tok-comment">// _ = try tty.write(ctlseqs.xtversion);</span>
</span>
<span class="line" id="L224"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.csi_u_query);</span>
<span class="line" id="L225"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.kitty_graphics_query);</span>
<span class="line" id="L226"> <span class="tok-comment">// TODO: sixel geometry query interferes with F4 keys.</span>
</span>
<span class="line" id="L227"> <span class="tok-comment">// _ = try tty.write(ctlseqs.sixel_geometry_query);</span>
</span>
<span class="line" id="L228"></span>
<span class="line" id="L229"> <span class="tok-comment">// TODO: XTGETTCAP queries (&quot;RGB&quot;, &quot;Smulx&quot;)</span>
</span>
<span class="line" id="L230"></span>
<span class="line" id="L231"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.primary_device_attrs);</span>
<span class="line" id="L232"> <span class="tok-kw">try</span> tty.flush();</span>
<span class="line" id="L233"></span>
<span class="line" id="L234"> <span class="tok-comment">// 1 second timeout</span>
</span>
<span class="line" id="L235"> std.Thread.Futex.timedWait(&amp;self.query_futex, <span class="tok-number">0</span>, <span class="tok-number">1</span> * std.time.ns_per_s) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L236"></span>
<span class="line" id="L237"> <span class="tok-comment">// enable detected features</span>
</span>
<span class="line" id="L238"> <span class="tok-kw">if</span> (self.caps.kitty_keyboard) {</span>
<span class="line" id="L239"> <span class="tok-kw">try</span> self.enableKittyKeyboard(.{});</span>
<span class="line" id="L240"> }</span>
<span class="line" id="L241"> <span class="tok-kw">if</span> (self.caps.unicode) {</span>
<span class="line" id="L242"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.unicode_set);</span>
<span class="line" id="L243"> }</span>
<span class="line" id="L244"> }</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"> <span class="tok-comment">// the next render call will refresh the entire screen</span>
</span>
<span class="line" id="L247"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">queueRefresh</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L248"> self.refresh = <span class="tok-null">true</span>;</span>
<span class="line" id="L249"> }</span>
<span class="line" id="L250"></span>
<span class="line" id="L251"> <span class="tok-comment">/// draws the screen to the terminal</span></span>
<span class="line" id="L252"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">render</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L253"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span>;</span>
<span class="line" id="L254"> self.renders += <span class="tok-number">1</span>;</span>
<span class="line" id="L255"> <span class="tok-kw">const</span> timer_start = std.time.microTimestamp();</span>
<span class="line" id="L256"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L257"> self.render_dur += std.time.microTimestamp() - timer_start;</span>
<span class="line" id="L258"> }</span>
<span class="line" id="L259"></span>
<span class="line" id="L260"> <span class="tok-kw">defer</span> self.refresh = <span class="tok-null">false</span>;</span>
<span class="line" id="L261"> <span class="tok-kw">defer</span> tty.flush() <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L262"></span>
<span class="line" id="L263"> <span class="tok-comment">// Set up sync before we write anything</span>
</span>
<span class="line" id="L264"> <span class="tok-comment">// TODO: optimize sync so we only sync _when we have changes_. This</span>
</span>
<span class="line" id="L265"> <span class="tok-comment">// requires a smarter buffered writer, we'll probably have to write</span>
</span>
<span class="line" id="L266"> <span class="tok-comment">// our own</span>
</span>
<span class="line" id="L267"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.sync_set);</span>
<span class="line" id="L268"> <span class="tok-kw">defer</span> _ = tty.write(ctlseqs.sync_reset) <span class="tok-kw">catch</span> {};</span>
<span class="line" id="L269"></span>
<span class="line" id="L270"> <span class="tok-comment">// Send the cursor to 0,0</span>
</span>
<span class="line" id="L271"> <span class="tok-comment">// TODO: this needs to move after we optimize writes. We only do</span>
</span>
<span class="line" id="L272"> <span class="tok-comment">// this if we have an update to make. We also need to hide cursor</span>
</span>
<span class="line" id="L273"> <span class="tok-comment">// and then reshow it if needed</span>
</span>
<span class="line" id="L274"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.hide_cursor);</span>
<span class="line" id="L275"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.home);</span>
<span class="line" id="L276"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.sgr_reset);</span>
<span class="line" id="L277"></span>
<span class="line" id="L278"> <span class="tok-comment">// initialize some variables</span>
</span>
<span class="line" id="L279"> <span class="tok-kw">var</span> reposition: <span class="tok-type">bool</span> = <span class="tok-null">false</span>;</span>
<span class="line" id="L280"> <span class="tok-kw">var</span> row: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L281"> <span class="tok-kw">var</span> col: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L282"> <span class="tok-kw">var</span> cursor: Style = .{};</span>
<span class="line" id="L283"> <span class="tok-kw">var</span> link: Hyperlink = .{};</span>
<span class="line" id="L284"></span>
<span class="line" id="L285"> <span class="tok-comment">// Clear all images</span>
</span>
<span class="line" id="L286"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.kitty_graphics_clear);</span>
<span class="line" id="L287"></span>
<span class="line" id="L288"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L289"> <span class="tok-kw">while</span> (i &lt; self.screen.buf.len) {</span>
<span class="line" id="L290"> <span class="tok-kw">const</span> cell = self.screen.buf[i];</span>
<span class="line" id="L291"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L292"> <span class="tok-comment">// advance by the width of this char mod 1</span>
</span>
<span class="line" id="L293"> <span class="tok-kw">const</span> w = blk: {</span>
<span class="line" id="L294"> <span class="tok-kw">if</span> (cell.char.width != <span class="tok-number">0</span>) <span class="tok-kw">break</span> :blk cell.char.width;</span>
<span class="line" id="L295"></span>
<span class="line" id="L296"> <span class="tok-kw">const</span> method: gwidth.Method = <span class="tok-kw">if</span> (self.caps.unicode) .unicode <span class="tok-kw">else</span> .wcwidth;</span>
<span class="line" id="L297"> <span class="tok-kw">break</span> :blk gwidth.gwidth(cell.char.grapheme, method) <span class="tok-kw">catch</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L298"> };</span>
<span class="line" id="L299"> <span class="tok-kw">var</span> j = i + <span class="tok-number">1</span>;</span>
<span class="line" id="L300"> <span class="tok-kw">while</span> (j &lt; i + w) : (j += <span class="tok-number">1</span>) {</span>
<span class="line" id="L301"> self.screen_last.buf[j].skipped = <span class="tok-null">true</span>;</span>
<span class="line" id="L302"> }</span>
<span class="line" id="L303"> col += w;</span>
<span class="line" id="L304"> i += w;</span>
<span class="line" id="L305"> }</span>
<span class="line" id="L306"> <span class="tok-kw">if</span> (col &gt;= self.screen.width) {</span>
<span class="line" id="L307"> row += <span class="tok-number">1</span>;</span>
<span class="line" id="L308"> col = <span class="tok-number">0</span>;</span>
<span class="line" id="L309"> }</span>
<span class="line" id="L310"> <span class="tok-comment">// If cell is the same as our last frame, we don't need to do</span>
</span>
<span class="line" id="L311"> <span class="tok-comment">// anything</span>
</span>
<span class="line" id="L312"> <span class="tok-kw">const</span> last = self.screen_last.buf[i];</span>
<span class="line" id="L313"> <span class="tok-kw">if</span> (!self.refresh <span class="tok-kw">and</span> last.eql(cell) <span class="tok-kw">and</span> !last.skipped <span class="tok-kw">and</span> cell.image == <span class="tok-null">null</span>) {</span>
<span class="line" id="L314"> reposition = <span class="tok-null">true</span>;</span>
<span class="line" id="L315"> <span class="tok-comment">// Close any osc8 sequence we might be in before</span>
</span>
<span class="line" id="L316"> <span class="tok-comment">// repositioning</span>
</span>
<span class="line" id="L317"> <span class="tok-kw">if</span> (link.uri.len &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L318"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.osc8_clear);</span>
<span class="line" id="L319"> }</span>
<span class="line" id="L320"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L321"> }</span>
<span class="line" id="L322"> self.screen_last.buf[i].skipped = <span class="tok-null">false</span>;</span>
<span class="line" id="L323"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L324"> cursor = cell.style;</span>
<span class="line" id="L325"> link = cell.link;</span>
<span class="line" id="L326"> }</span>
<span class="line" id="L327"> <span class="tok-comment">// Set this cell in the last frame</span>
</span>
<span class="line" id="L328"> self.screen_last.writeCell(col, row, cell);</span>
<span class="line" id="L329"></span>
<span class="line" id="L330"> <span class="tok-comment">// reposition the cursor, if needed</span>
</span>
<span class="line" id="L331"> <span class="tok-kw">if</span> (reposition) {</span>
<span class="line" id="L332"> <span class="tok-kw">try</span> std.fmt.format(tty.buffered_writer.writer(), ctlseqs.cup, .{ row + <span class="tok-number">1</span>, col + <span class="tok-number">1</span> });</span>
<span class="line" id="L333"> }</span>
<span class="line" id="L334"></span>
<span class="line" id="L335"> <span class="tok-kw">if</span> (cell.image) |img| {</span>
<span class="line" id="L336"> <span class="tok-kw">if</span> (img.size) |size| {</span>
<span class="line" id="L337"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L338"> tty.buffered_writer.writer(),</span>
<span class="line" id="L339"> ctlseqs.kitty_graphics_scale,</span>
<span class="line" id="L340"> .{ img.img_id, img.z_index, size.cols, size.rows },</span>
<span class="line" id="L341"> );</span>
<span class="line" id="L342"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L343"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L344"> tty.buffered_writer.writer(),</span>
<span class="line" id="L345"> ctlseqs.kitty_graphics_place,</span>
<span class="line" id="L346"> .{ img.img_id, img.z_index },</span>
<span class="line" id="L347"> );</span>
<span class="line" id="L348"> }</span>
<span class="line" id="L349"> }</span>
<span class="line" id="L350"></span>
<span class="line" id="L351"> <span class="tok-comment">// something is different, so let's loop through everything and</span>
</span>
<span class="line" id="L352"> <span class="tok-comment">// find out what</span>
</span>
<span class="line" id="L353"></span>
<span class="line" id="L354"> <span class="tok-comment">// foreground</span>
</span>
<span class="line" id="L355"> <span class="tok-kw">if</span> (!std.meta.eql(cursor.fg, cell.style.fg)) {</span>
<span class="line" id="L356"> <span class="tok-kw">const</span> writer = tty.buffered_writer.writer();</span>
<span class="line" id="L357"> <span class="tok-kw">switch</span> (cell.style.fg) {</span>
<span class="line" id="L358"> .default =&gt; _ = <span class="tok-kw">try</span> tty.write(ctlseqs.fg_reset),</span>
<span class="line" id="L359"> .index =&gt; |idx| {</span>
<span class="line" id="L360"> <span class="tok-kw">switch</span> (idx) {</span>
<span class="line" id="L361"> <span class="tok-number">0</span>...<span class="tok-number">7</span> =&gt; <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.fg_base, .{idx}),</span>
<span class="line" id="L362"> <span class="tok-number">8</span>...<span class="tok-number">15</span> =&gt; <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.fg_bright, .{idx - <span class="tok-number">8</span>}),</span>
<span class="line" id="L363"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.fg_indexed, .{idx}),</span>
<span class="line" id="L364"> }</span>
<span class="line" id="L365"> },</span>
<span class="line" id="L366"> .rgb =&gt; |rgb| {</span>
<span class="line" id="L367"> <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.fg_rgb, .{ rgb[<span class="tok-number">0</span>], rgb[<span class="tok-number">1</span>], rgb[<span class="tok-number">2</span>] });</span>
<span class="line" id="L368"> },</span>
<span class="line" id="L369"> }</span>
<span class="line" id="L370"> }</span>
<span class="line" id="L371"> <span class="tok-comment">// background</span>
</span>
<span class="line" id="L372"> <span class="tok-kw">if</span> (!std.meta.eql(cursor.bg, cell.style.bg)) {</span>
<span class="line" id="L373"> <span class="tok-kw">const</span> writer = tty.buffered_writer.writer();</span>
<span class="line" id="L374"> <span class="tok-kw">switch</span> (cell.style.bg) {</span>
<span class="line" id="L375"> .default =&gt; _ = <span class="tok-kw">try</span> tty.write(ctlseqs.bg_reset),</span>
<span class="line" id="L376"> .index =&gt; |idx| {</span>
<span class="line" id="L377"> <span class="tok-kw">switch</span> (idx) {</span>
<span class="line" id="L378"> <span class="tok-number">0</span>...<span class="tok-number">7</span> =&gt; <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.bg_base, .{idx}),</span>
<span class="line" id="L379"> <span class="tok-number">8</span>...<span class="tok-number">15</span> =&gt; <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.bg_bright, .{idx - <span class="tok-number">8</span>}),</span>
<span class="line" id="L380"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.bg_indexed, .{idx}),</span>
<span class="line" id="L381"> }</span>
<span class="line" id="L382"> },</span>
<span class="line" id="L383"> .rgb =&gt; |rgb| {</span>
<span class="line" id="L384"> <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.bg_rgb, .{ rgb[<span class="tok-number">0</span>], rgb[<span class="tok-number">1</span>], rgb[<span class="tok-number">2</span>] });</span>
<span class="line" id="L385"> },</span>
<span class="line" id="L386"> }</span>
<span class="line" id="L387"> }</span>
<span class="line" id="L388"> <span class="tok-comment">// underline color</span>
</span>
<span class="line" id="L389"> <span class="tok-kw">if</span> (!std.meta.eql(cursor.ul, cell.style.ul)) {</span>
<span class="line" id="L390"> <span class="tok-kw">const</span> writer = tty.buffered_writer.writer();</span>
<span class="line" id="L391"> <span class="tok-kw">switch</span> (cell.style.bg) {</span>
<span class="line" id="L392"> .default =&gt; _ = <span class="tok-kw">try</span> tty.write(ctlseqs.ul_reset),</span>
<span class="line" id="L393"> .index =&gt; |idx| {</span>
<span class="line" id="L394"> <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.ul_indexed, .{idx});</span>
<span class="line" id="L395"> },</span>
<span class="line" id="L396"> .rgb =&gt; |rgb| {</span>
<span class="line" id="L397"> <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.ul_rgb, .{ rgb[<span class="tok-number">0</span>], rgb[<span class="tok-number">1</span>], rgb[<span class="tok-number">2</span>] });</span>
<span class="line" id="L398"> },</span>
<span class="line" id="L399"> }</span>
<span class="line" id="L400"> }</span>
<span class="line" id="L401"> <span class="tok-comment">// underline style</span>
</span>
<span class="line" id="L402"> <span class="tok-kw">if</span> (!std.meta.eql(cursor.ul_style, cell.style.ul_style)) {</span>
<span class="line" id="L403"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.ul_style) {</span>
<span class="line" id="L404"> .off =&gt; ctlseqs.ul_off,</span>
<span class="line" id="L405"> .single =&gt; ctlseqs.ul_single,</span>
<span class="line" id="L406"> .double =&gt; ctlseqs.ul_double,</span>
<span class="line" id="L407"> .curly =&gt; ctlseqs.ul_curly,</span>
<span class="line" id="L408"> .dotted =&gt; ctlseqs.ul_dotted,</span>
<span class="line" id="L409"> .dashed =&gt; ctlseqs.ul_dashed,</span>
<span class="line" id="L410"> };</span>
<span class="line" id="L411"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L412"> }</span>
<span class="line" id="L413"> <span class="tok-comment">// bold</span>
</span>
<span class="line" id="L414"> <span class="tok-kw">if</span> (cursor.bold != cell.style.bold) {</span>
<span class="line" id="L415"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.bold) {</span>
<span class="line" id="L416"> <span class="tok-null">true</span> =&gt; ctlseqs.bold_set,</span>
<span class="line" id="L417"> <span class="tok-null">false</span> =&gt; ctlseqs.bold_dim_reset,</span>
<span class="line" id="L418"> };</span>
<span class="line" id="L419"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L420"> <span class="tok-kw">if</span> (cell.style.dim) {</span>
<span class="line" id="L421"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.dim_set);</span>
<span class="line" id="L422"> }</span>
<span class="line" id="L423"> }</span>
<span class="line" id="L424"> <span class="tok-comment">// dim</span>
</span>
<span class="line" id="L425"> <span class="tok-kw">if</span> (cursor.dim != cell.style.dim) {</span>
<span class="line" id="L426"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.dim) {</span>
<span class="line" id="L427"> <span class="tok-null">true</span> =&gt; ctlseqs.dim_set,</span>
<span class="line" id="L428"> <span class="tok-null">false</span> =&gt; ctlseqs.bold_dim_reset,</span>
<span class="line" id="L429"> };</span>
<span class="line" id="L430"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L431"> <span class="tok-kw">if</span> (cell.style.bold) {</span>
<span class="line" id="L432"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.bold_set);</span>
<span class="line" id="L433"> }</span>
<span class="line" id="L434"> }</span>
<span class="line" id="L435"> <span class="tok-comment">// dim</span>
</span>
<span class="line" id="L436"> <span class="tok-kw">if</span> (cursor.italic != cell.style.italic) {</span>
<span class="line" id="L437"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.italic) {</span>
<span class="line" id="L438"> <span class="tok-null">true</span> =&gt; ctlseqs.italic_set,</span>
<span class="line" id="L439"> <span class="tok-null">false</span> =&gt; ctlseqs.italic_reset,</span>
<span class="line" id="L440"> };</span>
<span class="line" id="L441"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L442"> }</span>
<span class="line" id="L443"> <span class="tok-comment">// dim</span>
</span>
<span class="line" id="L444"> <span class="tok-kw">if</span> (cursor.blink != cell.style.blink) {</span>
<span class="line" id="L445"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.blink) {</span>
<span class="line" id="L446"> <span class="tok-null">true</span> =&gt; ctlseqs.blink_set,</span>
<span class="line" id="L447"> <span class="tok-null">false</span> =&gt; ctlseqs.blink_reset,</span>
<span class="line" id="L448"> };</span>
<span class="line" id="L449"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L450"> }</span>
<span class="line" id="L451"> <span class="tok-comment">// reverse</span>
</span>
<span class="line" id="L452"> <span class="tok-kw">if</span> (cursor.reverse != cell.style.reverse) {</span>
<span class="line" id="L453"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.reverse) {</span>
<span class="line" id="L454"> <span class="tok-null">true</span> =&gt; ctlseqs.reverse_set,</span>
<span class="line" id="L455"> <span class="tok-null">false</span> =&gt; ctlseqs.reverse_reset,</span>
<span class="line" id="L456"> };</span>
<span class="line" id="L457"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L458"> }</span>
<span class="line" id="L459"> <span class="tok-comment">// invisible</span>
</span>
<span class="line" id="L460"> <span class="tok-kw">if</span> (cursor.invisible != cell.style.invisible) {</span>
<span class="line" id="L461"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.invisible) {</span>
<span class="line" id="L462"> <span class="tok-null">true</span> =&gt; ctlseqs.invisible_set,</span>
<span class="line" id="L463"> <span class="tok-null">false</span> =&gt; ctlseqs.invisible_reset,</span>
<span class="line" id="L464"> };</span>
<span class="line" id="L465"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L466"> }</span>
<span class="line" id="L467"> <span class="tok-comment">// strikethrough</span>
</span>
<span class="line" id="L468"> <span class="tok-kw">if</span> (cursor.strikethrough != cell.style.strikethrough) {</span>
<span class="line" id="L469"> <span class="tok-kw">const</span> seq = <span class="tok-kw">switch</span> (cell.style.strikethrough) {</span>
<span class="line" id="L470"> <span class="tok-null">true</span> =&gt; ctlseqs.strikethrough_set,</span>
<span class="line" id="L471"> <span class="tok-null">false</span> =&gt; ctlseqs.strikethrough_reset,</span>
<span class="line" id="L472"> };</span>
<span class="line" id="L473"> _ = <span class="tok-kw">try</span> tty.write(seq);</span>
<span class="line" id="L474"> }</span>
<span class="line" id="L475"></span>
<span class="line" id="L476"> <span class="tok-comment">// url</span>
</span>
<span class="line" id="L477"> <span class="tok-kw">if</span> (!std.meta.eql(link.uri, cell.link.uri)) {</span>
<span class="line" id="L478"> <span class="tok-kw">var</span> ps = cell.link.params;</span>
<span class="line" id="L479"> <span class="tok-kw">if</span> (cell.link.uri.len == <span class="tok-number">0</span>) {</span>
<span class="line" id="L480"> <span class="tok-comment">// Empty out the params no matter what if we don't have</span>
</span>
<span class="line" id="L481"> <span class="tok-comment">// a url</span>
</span>
<span class="line" id="L482"> ps = <span class="tok-str">&quot;&quot;</span>;</span>
<span class="line" id="L483"> }</span>
<span class="line" id="L484"> <span class="tok-kw">const</span> writer = tty.buffered_writer.writer();</span>
<span class="line" id="L485"> <span class="tok-kw">try</span> std.fmt.format(writer, ctlseqs.osc8, .{ ps, cell.link.uri });</span>
<span class="line" id="L486"> }</span>
<span class="line" id="L487"> _ = <span class="tok-kw">try</span> tty.write(cell.char.grapheme);</span>
<span class="line" id="L488"> }</span>
<span class="line" id="L489"> <span class="tok-kw">if</span> (self.screen.cursor_vis) {</span>
<span class="line" id="L490"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L491"> tty.buffered_writer.writer(),</span>
<span class="line" id="L492"> ctlseqs.cup,</span>
<span class="line" id="L493"> .{</span>
<span class="line" id="L494"> self.screen.cursor_row + <span class="tok-number">1</span>,</span>
<span class="line" id="L495"> self.screen.cursor_col + <span class="tok-number">1</span>,</span>
<span class="line" id="L496"> },</span>
<span class="line" id="L497"> );</span>
<span class="line" id="L498"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.show_cursor);</span>
<span class="line" id="L499"> }</span>
<span class="line" id="L500"> <span class="tok-kw">if</span> (self.screen.mouse_shape != self.screen_last.mouse_shape) {</span>
<span class="line" id="L501"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L502"> tty.buffered_writer.writer(),</span>
<span class="line" id="L503"> ctlseqs.osc22_mouse_shape,</span>
<span class="line" id="L504"> .{<span class="tok-builtin">@tagName</span>(self.screen.mouse_shape)},</span>
<span class="line" id="L505"> );</span>
<span class="line" id="L506"> }</span>
<span class="line" id="L507"> }</span>
<span class="line" id="L508"></span>
<span class="line" id="L509"> <span class="tok-kw">fn</span> <span class="tok-fn">enableKittyKeyboard</span>(self: *Self, flags: Key.KittyFlags) !<span class="tok-type">void</span> {</span>
<span class="line" id="L510"> self.state.kitty_keyboard = <span class="tok-null">true</span>;</span>
<span class="line" id="L511"> <span class="tok-kw">const</span> flag_int: <span class="tok-type">u5</span> = <span class="tok-builtin">@bitCast</span>(flags);</span>
<span class="line" id="L512"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L513"> self.tty.?.buffered_writer.writer(),</span>
<span class="line" id="L514"> ctlseqs.csi_u_push,</span>
<span class="line" id="L515"> .{</span>
<span class="line" id="L516"> flag_int,</span>
<span class="line" id="L517"> },</span>
<span class="line" id="L518"> );</span>
<span class="line" id="L519"> <span class="tok-kw">try</span> self.tty.?.flush();</span>
<span class="line" id="L520"> }</span>
<span class="line" id="L521"></span>
<span class="line" id="L522"> <span class="tok-comment">/// send a system notification</span></span>
<span class="line" id="L523"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">notify</span>(self: *Self, title: ?[]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, body: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L524"> <span class="tok-kw">if</span> (self.tty == <span class="tok-null">null</span>) <span class="tok-kw">return</span>;</span>
<span class="line" id="L525"> <span class="tok-kw">if</span> (title) |t| {</span>
<span class="line" id="L526"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L527"> self.tty.?.buffered_writer.writer(),</span>
<span class="line" id="L528"> ctlseqs.osc777_notify,</span>
<span class="line" id="L529"> .{ t, body },</span>
<span class="line" id="L530"> );</span>
<span class="line" id="L531"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L532"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L533"> self.tty.?.buffered_writer.writer(),</span>
<span class="line" id="L534"> ctlseqs.osc9_notify,</span>
<span class="line" id="L535"> .{body},</span>
<span class="line" id="L536"> );</span>
<span class="line" id="L537"> }</span>
<span class="line" id="L538"> <span class="tok-kw">try</span> self.tty.?.flush();</span>
<span class="line" id="L539"> }</span>
<span class="line" id="L540"></span>
<span class="line" id="L541"> <span class="tok-comment">/// sets the window title</span></span>
<span class="line" id="L542"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">setTitle</span>(self: *Self, title: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L543"> <span class="tok-kw">if</span> (self.tty == <span class="tok-null">null</span>) <span class="tok-kw">return</span>;</span>
<span class="line" id="L544"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L545"> self.tty.?.buffered_writer.writer(),</span>
<span class="line" id="L546"> ctlseqs.osc2_set_title,</span>
<span class="line" id="L547"> .{title},</span>
<span class="line" id="L548"> );</span>
<span class="line" id="L549"> <span class="tok-kw">try</span> self.tty.?.flush();</span>
<span class="line" id="L550"> }</span>
<span class="line" id="L551"></span>
<span class="line" id="L552"> <span class="tok-comment">// turn bracketed paste on or off. An event will be sent at the</span>
</span>
<span class="line" id="L553"> <span class="tok-comment">// beginning and end of a detected paste. All keystrokes between these</span>
</span>
<span class="line" id="L554"> <span class="tok-comment">// events were pasted</span>
</span>
<span class="line" id="L555"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">setBracketedPaste</span>(self: *Self, enable: <span class="tok-type">bool</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L556"> <span class="tok-kw">if</span> (self.tty == <span class="tok-null">null</span>) <span class="tok-kw">return</span>;</span>
<span class="line" id="L557"> self.state.bracketed_paste = enable;</span>
<span class="line" id="L558"> <span class="tok-kw">const</span> seq = <span class="tok-kw">if</span> (enable) {</span>
<span class="line" id="L559"> self.state.bracketed_paste = <span class="tok-null">true</span>;</span>
<span class="line" id="L560"> ctlseqs.bp_set;</span>
<span class="line" id="L561"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L562"> self.state.bracketed_paste = <span class="tok-null">true</span>;</span>
<span class="line" id="L563"> ctlseqs.bp_reset;</span>
<span class="line" id="L564"> };</span>
<span class="line" id="L565"> _ = <span class="tok-kw">try</span> self.tty.?.write(seq);</span>
<span class="line" id="L566"> <span class="tok-kw">try</span> self.tty.?.flush();</span>
<span class="line" id="L567"> }</span>
<span class="line" id="L568"></span>
<span class="line" id="L569"> <span class="tok-comment">/// set the mouse shape</span></span>
<span class="line" id="L570"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">setMouseShape</span>(self: *Self, shape: Shape) <span class="tok-type">void</span> {</span>
<span class="line" id="L571"> self.screen.mouse_shape = shape;</span>
<span class="line" id="L572"> }</span>
<span class="line" id="L573"></span>
<span class="line" id="L574"> <span class="tok-comment">/// turn mouse reporting on or off</span></span>
<span class="line" id="L575"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">setMouseMode</span>(self: *Self, enable: <span class="tok-type">bool</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L576"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span>;</span>
<span class="line" id="L577"> self.state.mouse = enable;</span>
<span class="line" id="L578"> <span class="tok-kw">if</span> (enable) {</span>
<span class="line" id="L579"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.mouse_set);</span>
<span class="line" id="L580"> <span class="tok-kw">try</span> tty.flush();</span>
<span class="line" id="L581"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L582"> _ = <span class="tok-kw">try</span> tty.write(ctlseqs.mouse_reset);</span>
<span class="line" id="L583"> <span class="tok-kw">try</span> tty.flush();</span>
<span class="line" id="L584"> }</span>
<span class="line" id="L585"> }</span>
<span class="line" id="L586"></span>
<span class="line" id="L587"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">loadImage</span>(</span>
<span class="line" id="L588"> self: *Self,</span>
<span class="line" id="L589"> alloc: std.mem.Allocator,</span>
<span class="line" id="L590"> src: Image.Source,</span>
<span class="line" id="L591"> ) !Image {</span>
<span class="line" id="L592"> <span class="tok-kw">if</span> (!self.caps.kitty_graphics) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.NoGraphicsCapability;</span>
<span class="line" id="L593"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.NoTTY;</span>
<span class="line" id="L594"> <span class="tok-kw">defer</span> self.next_img_id += <span class="tok-number">1</span>;</span>
<span class="line" id="L595"></span>
<span class="line" id="L596"> <span class="tok-kw">const</span> writer = tty.buffered_writer.writer();</span>
<span class="line" id="L597"></span>
<span class="line" id="L598"> <span class="tok-kw">var</span> img = <span class="tok-kw">switch</span> (src) {</span>
<span class="line" id="L599"> .path =&gt; |path| <span class="tok-kw">try</span> zigimg.Image.fromFilePath(alloc, path),</span>
<span class="line" id="L600"> .mem =&gt; |bytes| <span class="tok-kw">try</span> zigimg.Image.fromMemory(alloc, bytes),</span>
<span class="line" id="L601"> };</span>
<span class="line" id="L602"> <span class="tok-kw">defer</span> img.deinit();</span>
<span class="line" id="L603"> <span class="tok-kw">const</span> png_buf = <span class="tok-kw">try</span> alloc.alloc(<span class="tok-type">u8</span>, img.imageByteSize());</span>
<span class="line" id="L604"> <span class="tok-kw">defer</span> alloc.free(png_buf);</span>
<span class="line" id="L605"> <span class="tok-kw">const</span> png = <span class="tok-kw">try</span> img.writeToMemory(png_buf, .{ .png = .{} });</span>
<span class="line" id="L606"> <span class="tok-kw">const</span> b64_buf = <span class="tok-kw">try</span> alloc.alloc(<span class="tok-type">u8</span>, base64.calcSize(png.len));</span>
<span class="line" id="L607"> <span class="tok-kw">const</span> encoded = base64.encode(b64_buf, png);</span>
<span class="line" id="L608"> <span class="tok-kw">defer</span> alloc.free(b64_buf);</span>
<span class="line" id="L609"></span>
<span class="line" id="L610"> <span class="tok-kw">const</span> id = self.next_img_id;</span>
<span class="line" id="L611"></span>
<span class="line" id="L612"> log.debug(<span class="tok-str">&quot;transmitting kitty image: id={d}, len={d}&quot;</span>, .{ id, encoded.len });</span>
<span class="line" id="L613"></span>
<span class="line" id="L614"> <span class="tok-kw">if</span> (encoded.len &lt; <span class="tok-number">4096</span>) {</span>
<span class="line" id="L615"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L616"> writer,</span>
<span class="line" id="L617"> <span class="tok-str">&quot;\x1b_Gf=100,i={d};{s}\x1b\\&quot;</span>,</span>
<span class="line" id="L618"> .{</span>
<span class="line" id="L619"> id,</span>
<span class="line" id="L620"> encoded,</span>
<span class="line" id="L621"> },</span>
<span class="line" id="L622"> );</span>
<span class="line" id="L623"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L624"> <span class="tok-kw">var</span> n: <span class="tok-type">usize</span> = <span class="tok-number">4096</span>;</span>
<span class="line" id="L625"></span>
<span class="line" id="L626"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L627"> writer,</span>
<span class="line" id="L628"> <span class="tok-str">&quot;\x1b_Gf=100,i={d},m=1;{s}\x1b\\&quot;</span>,</span>
<span class="line" id="L629"> .{ id, encoded[<span class="tok-number">0</span>..n] },</span>
<span class="line" id="L630"> );</span>
<span class="line" id="L631"> <span class="tok-kw">while</span> (n &lt; encoded.len) : (n += <span class="tok-number">4096</span>) {</span>
<span class="line" id="L632"> <span class="tok-kw">const</span> end: <span class="tok-type">usize</span> = <span class="tok-builtin">@min</span>(n + <span class="tok-number">4096</span>, encoded.len);</span>
<span class="line" id="L633"> <span class="tok-kw">const</span> m: <span class="tok-type">u2</span> = <span class="tok-kw">if</span> (end == encoded.len) <span class="tok-number">0</span> <span class="tok-kw">else</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L634"> <span class="tok-kw">try</span> std.fmt.format(</span>
<span class="line" id="L635"> writer,</span>
<span class="line" id="L636"> <span class="tok-str">&quot;\x1b_Gm={d};{s}\x1b\\&quot;</span>,</span>
<span class="line" id="L637"> .{</span>
<span class="line" id="L638"> m,</span>
<span class="line" id="L639"> encoded[n..end],</span>
<span class="line" id="L640"> },</span>
<span class="line" id="L641"> );</span>
<span class="line" id="L642"> }</span>
<span class="line" id="L643"> }</span>
<span class="line" id="L644"> <span class="tok-kw">try</span> tty.buffered_writer.flush();</span>
<span class="line" id="L645"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L646"> .id = id,</span>
<span class="line" id="L647"> .width = img.width,</span>
<span class="line" id="L648"> .height = img.height,</span>
<span class="line" id="L649"> };</span>
<span class="line" id="L650"> }</span>
<span class="line" id="L651"></span>
<span class="line" id="L652"> <span class="tok-comment">/// deletes an image from the terminal's memory</span></span>
<span class="line" id="L653"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">freeImage</span>(self: Self, id: <span class="tok-type">u32</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L654"> <span class="tok-kw">var</span> tty = self.tty <span class="tok-kw">orelse</span> <span class="tok-kw">return</span>;</span>
<span class="line" id="L655"> <span class="tok-kw">const</span> writer = tty.buffered_writer.writer();</span>
<span class="line" id="L656"> std.fmt.format(writer, <span class="tok-str">&quot;\x1b_Ga=d,d=I,i={d};\x1b\\&quot;</span>, .{id}) <span class="tok-kw">catch</span> |err| {</span>
<span class="line" id="L657"> log.err(<span class="tok-str">&quot;couldn't delete image {d}: {}&quot;</span>, .{ id, err });</span>
<span class="line" id="L658"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L659"> };</span>
<span class="line" id="L660"> tty.buffered_writer.flush() <span class="tok-kw">catch</span> |err| {</span>
<span class="line" id="L661"> log.err(<span class="tok-str">&quot;couldn't flush writer: {}&quot;</span>, .{err});</span>
<span class="line" id="L662"> };</span>
<span class="line" id="L663"> }</span>
<span class="line" id="L664"> };</span>
<span class="line" id="L665">}</span>
<span class="line" id="L666"></span>
<span class="line" id="L667"><span class="tok-kw">test</span> <span class="tok-str">&quot;Vaxis: event queueing&quot;</span> {</span>
<span class="line" id="L668"> <span class="tok-kw">const</span> Event = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L669"> key,</span>
<span class="line" id="L670"> };</span>
<span class="line" id="L671"> <span class="tok-kw">var</span> vx: Vaxis(Event) = <span class="tok-kw">try</span> Vaxis(Event).init(.{});</span>
<span class="line" id="L672"> <span class="tok-kw">defer</span> vx.deinit(<span class="tok-null">null</span>);</span>
<span class="line" id="L673"> vx.postEvent(.key);</span>
<span class="line" id="L674"> <span class="tok-kw">const</span> event = vx.nextEvent();</span>
<span class="line" id="L675"> <span class="tok-kw">try</span> std.testing.expect(event == .key);</span>
<span class="line" id="L676">}</span>
<span class="line" id="L677"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> border = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;widgets/border.zig&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> alignment = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;widgets/alignment.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> TextInput = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;widgets/TextInput.zig&quot;</span>);</span>
<span class="line" id="L4"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> Key = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Key.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> Cell = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Cell.zig&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Window = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Window.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> GraphemeIterator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph&quot;</span>).GraphemeIterator;</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> log = std.log.scoped(.text_input);</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">const</span> TextInput = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-comment">/// The events that this widget handles</span></span>
<span class="line" id="L12"><span class="tok-kw">const</span> Event = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L13"> key_press: Key,</span>
<span class="line" id="L14">};</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-comment">// Index of our cursor</span>
</span>
<span class="line" id="L17">cursor_idx: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L18">grapheme_count: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-comment">// TODO: an ArrayList is not great for this. orderedRemove is O(n) and we can</span>
</span>
<span class="line" id="L21"><span class="tok-comment">// only remove one byte at a time. Make a bespoke ArrayList which allows removal</span>
</span>
<span class="line" id="L22"><span class="tok-comment">// of a slice at a time, or truncating even would be nice</span>
</span>
<span class="line" id="L23">buf: std.ArrayList(<span class="tok-type">u8</span>),</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(alloc: std.mem.Allocator) TextInput {</span>
<span class="line" id="L26"> <span class="tok-kw">return</span> TextInput{</span>
<span class="line" id="L27"> .buf = std.ArrayList(<span class="tok-type">u8</span>).init(alloc),</span>
<span class="line" id="L28"> };</span>
<span class="line" id="L29">}</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *TextInput) <span class="tok-type">void</span> {</span>
<span class="line" id="L32"> self.buf.deinit();</span>
<span class="line" id="L33">}</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">update</span>(self: *TextInput, event: Event) !<span class="tok-type">void</span> {</span>
<span class="line" id="L36"> <span class="tok-kw">switch</span> (event) {</span>
<span class="line" id="L37"> .key_press =&gt; |key| {</span>
<span class="line" id="L38"> <span class="tok-kw">if</span> (key.matches(Key.backspace, .{})) {</span>
<span class="line" id="L39"> <span class="tok-kw">if</span> (self.cursor_idx == <span class="tok-number">0</span>) <span class="tok-kw">return</span>;</span>
<span class="line" id="L40"> self.deleteBeforeCursor();</span>
<span class="line" id="L41"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(Key.delete, .{}) <span class="tok-kw">or</span> key.matches(<span class="tok-str">'d'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L42"> <span class="tok-kw">if</span> (self.cursor_idx == self.grapheme_count) <span class="tok-kw">return</span>;</span>
<span class="line" id="L43"> self.deleteAtCursor();</span>
<span class="line" id="L44"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(Key.left, .{}) <span class="tok-kw">or</span> key.matches(<span class="tok-str">'b'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L45"> <span class="tok-kw">if</span> (self.cursor_idx &gt; <span class="tok-number">0</span>) self.cursor_idx -= <span class="tok-number">1</span>;</span>
<span class="line" id="L46"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(Key.right, .{}) <span class="tok-kw">or</span> key.matches(<span class="tok-str">'f'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L47"> <span class="tok-kw">if</span> (self.cursor_idx &lt; self.grapheme_count) self.cursor_idx += <span class="tok-number">1</span>;</span>
<span class="line" id="L48"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(<span class="tok-str">'a'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L49"> self.cursor_idx = <span class="tok-number">0</span>;</span>
<span class="line" id="L50"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(<span class="tok-str">'e'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L51"> self.cursor_idx = self.grapheme_count;</span>
<span class="line" id="L52"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(<span class="tok-str">'k'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L53"> <span class="tok-kw">while</span> (self.cursor_idx &lt; self.grapheme_count) {</span>
<span class="line" id="L54"> self.deleteAtCursor();</span>
<span class="line" id="L55"> }</span>
<span class="line" id="L56"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.matches(<span class="tok-str">'u'</span>, .{ .ctrl = <span class="tok-null">true</span> })) {</span>
<span class="line" id="L57"> <span class="tok-kw">while</span> (self.cursor_idx &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L58"> self.deleteBeforeCursor();</span>
<span class="line" id="L59"> }</span>
<span class="line" id="L60"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (key.text) |text| {</span>
<span class="line" id="L61"> <span class="tok-kw">try</span> self.buf.insertSlice(self.byteOffsetToCursor(), text);</span>
<span class="line" id="L62"> self.cursor_idx += <span class="tok-number">1</span>;</span>
<span class="line" id="L63"> self.grapheme_count += <span class="tok-number">1</span>;</span>
<span class="line" id="L64"> }</span>
<span class="line" id="L65"> },</span>
<span class="line" id="L66"> }</span>
<span class="line" id="L67">}</span>
<span class="line" id="L68"></span>
<span class="line" id="L69"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">draw</span>(self: *TextInput, win: Window) <span class="tok-type">void</span> {</span>
<span class="line" id="L70"> <span class="tok-kw">var</span> iter = GraphemeIterator.init(self.buf.items);</span>
<span class="line" id="L71"> <span class="tok-kw">var</span> col: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L72"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L73"> <span class="tok-kw">var</span> cursor_idx: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L74"> <span class="tok-kw">while</span> (iter.next()) |grapheme| {</span>
<span class="line" id="L75"> <span class="tok-kw">const</span> g = grapheme.slice(self.buf.items);</span>
<span class="line" id="L76"> <span class="tok-kw">const</span> w = win.gwidth(g);</span>
<span class="line" id="L77"> win.writeCell(col, <span class="tok-number">0</span>, .{</span>
<span class="line" id="L78"> .char = .{</span>
<span class="line" id="L79"> .grapheme = g,</span>
<span class="line" id="L80"> .width = w,</span>
<span class="line" id="L81"> },</span>
<span class="line" id="L82"> });</span>
<span class="line" id="L83"> col += w;</span>
<span class="line" id="L84"> i += <span class="tok-number">1</span>;</span>
<span class="line" id="L85"> <span class="tok-kw">if</span> (i == self.cursor_idx) cursor_idx = col;</span>
<span class="line" id="L86"> }</span>
<span class="line" id="L87"> win.showCursor(cursor_idx, <span class="tok-number">0</span>);</span>
<span class="line" id="L88">}</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"><span class="tok-comment">// returns the number of bytes before the cursor</span>
</span>
<span class="line" id="L91"><span class="tok-kw">fn</span> <span class="tok-fn">byteOffsetToCursor</span>(self: TextInput) <span class="tok-type">usize</span> {</span>
<span class="line" id="L92"> <span class="tok-kw">var</span> iter = GraphemeIterator.init(self.buf.items);</span>
<span class="line" id="L93"> <span class="tok-kw">var</span> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L94"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L95"> <span class="tok-kw">while</span> (iter.next()) |grapheme| {</span>
<span class="line" id="L96"> <span class="tok-kw">if</span> (i == self.cursor_idx) <span class="tok-kw">break</span>;</span>
<span class="line" id="L97"> offset += grapheme.len;</span>
<span class="line" id="L98"> i += <span class="tok-number">1</span>;</span>
<span class="line" id="L99"> }</span>
<span class="line" id="L100"> <span class="tok-kw">return</span> offset;</span>
<span class="line" id="L101">}</span>
<span class="line" id="L102"></span>
<span class="line" id="L103"><span class="tok-kw">fn</span> <span class="tok-fn">deleteBeforeCursor</span>(self: *TextInput) <span class="tok-type">void</span> {</span>
<span class="line" id="L104"> <span class="tok-kw">var</span> iter = GraphemeIterator.init(self.buf.items);</span>
<span class="line" id="L105"> <span class="tok-kw">var</span> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L106"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L107"> <span class="tok-kw">while</span> (iter.next()) |grapheme| {</span>
<span class="line" id="L108"> <span class="tok-kw">if</span> (i == self.cursor_idx) {</span>
<span class="line" id="L109"> <span class="tok-kw">var</span> j: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L110"> <span class="tok-kw">while</span> (j &lt; grapheme.len) : (j += <span class="tok-number">1</span>) {</span>
<span class="line" id="L111"> _ = self.buf.orderedRemove(offset);</span>
<span class="line" id="L112"> }</span>
<span class="line" id="L113"> self.cursor_idx -= <span class="tok-number">1</span>;</span>
<span class="line" id="L114"> self.grapheme_count -= <span class="tok-number">1</span>;</span>
<span class="line" id="L115"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"> offset += grapheme.len;</span>
<span class="line" id="L118"> i += <span class="tok-number">1</span>;</span>
<span class="line" id="L119"> }</span>
<span class="line" id="L120">}</span>
<span class="line" id="L121"></span>
<span class="line" id="L122"><span class="tok-kw">fn</span> <span class="tok-fn">deleteAtCursor</span>(self: *TextInput) <span class="tok-type">void</span> {</span>
<span class="line" id="L123"> <span class="tok-kw">var</span> iter = GraphemeIterator.init(self.buf.items);</span>
<span class="line" id="L124"> <span class="tok-kw">var</span> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L125"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L126"> <span class="tok-kw">while</span> (iter.next()) |grapheme| {</span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (i == self.cursor_idx + <span class="tok-number">1</span>) {</span>
<span class="line" id="L128"> <span class="tok-kw">var</span> j: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L129"> <span class="tok-kw">while</span> (j &lt; grapheme.len) : (j += <span class="tok-number">1</span>) {</span>
<span class="line" id="L130"> _ = self.buf.orderedRemove(offset);</span>
<span class="line" id="L131"> }</span>
<span class="line" id="L132"> self.grapheme_count -= <span class="tok-number">1</span>;</span>
<span class="line" id="L133"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L134"> }</span>
<span class="line" id="L135"> offset += grapheme.len;</span>
<span class="line" id="L136"> i += <span class="tok-number">1</span>;</span>
<span class="line" id="L137"> }</span>
<span class="line" id="L138">}</span>
<span class="line" id="L139"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> Window = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Window.zig&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">center</span>(parent: Window, cols: <span class="tok-type">usize</span>, rows: <span class="tok-type">usize</span>) Window {</span>
<span class="line" id="L4"> <span class="tok-kw">const</span> y_off = (parent.height / <span class="tok-number">2</span>) - (rows / <span class="tok-number">2</span>);</span>
<span class="line" id="L5"> <span class="tok-kw">const</span> x_off = (parent.width / <span class="tok-number">2</span>) - (cols / <span class="tok-number">2</span>);</span>
<span class="line" id="L6"> <span class="tok-kw">return</span> parent.initChild(x_off, y_off, .{ .limit = cols }, .{ .limit = rows });</span>
<span class="line" id="L7">}</span>
<span class="line" id="L8"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> Cell = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Cell.zig&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> Window = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Window.zig&quot;</span>);</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> Style = Cell.Style;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Character = Cell.Character;</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> horizontal = Character{ .grapheme = <span class="tok-str">&quot;&quot;</span>, .width = <span class="tok-number">1</span> };</span>
<span class="line" id="L8"><span class="tok-kw">const</span> vertical = Character{ .grapheme = <span class="tok-str">&quot;&quot;</span>, .width = <span class="tok-number">1</span> };</span>
<span class="line" id="L9"><span class="tok-kw">const</span> top_left = Character{ .grapheme = <span class="tok-str">&quot;&quot;</span>, .width = <span class="tok-number">1</span> };</span>
<span class="line" id="L10"><span class="tok-kw">const</span> top_right = Character{ .grapheme = <span class="tok-str">&quot;&quot;</span>, .width = <span class="tok-number">1</span> };</span>
<span class="line" id="L11"><span class="tok-kw">const</span> bottom_right = Character{ .grapheme = <span class="tok-str">&quot;&quot;</span>, .width = <span class="tok-number">1</span> };</span>
<span class="line" id="L12"><span class="tok-kw">const</span> bottom_left = Character{ .grapheme = <span class="tok-str">&quot;&quot;</span>, .width = <span class="tok-number">1</span> };</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">all</span>(win: Window, style: Style) Window {</span>
<span class="line" id="L15"> <span class="tok-kw">const</span> h = win.height;</span>
<span class="line" id="L16"> <span class="tok-kw">const</span> w = win.width;</span>
<span class="line" id="L17"> win.writeCell(<span class="tok-number">0</span>, <span class="tok-number">0</span>, .{ .char = top_left, .style = style });</span>
<span class="line" id="L18"> win.writeCell(<span class="tok-number">0</span>, h - <span class="tok-number">1</span>, .{ .char = bottom_left, .style = style });</span>
<span class="line" id="L19"> win.writeCell(w - <span class="tok-number">1</span>, <span class="tok-number">0</span>, .{ .char = top_right, .style = style });</span>
<span class="line" id="L20"> win.writeCell(w - <span class="tok-number">1</span>, h - <span class="tok-number">1</span>, .{ .char = bottom_right, .style = style });</span>
<span class="line" id="L21"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L22"> <span class="tok-kw">while</span> (i &lt; (h - <span class="tok-number">1</span>)) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L23"> win.writeCell(<span class="tok-number">0</span>, i, .{ .char = vertical, .style = style });</span>
<span class="line" id="L24"> win.writeCell(w - <span class="tok-number">1</span>, i, .{ .char = vertical, .style = style });</span>
<span class="line" id="L25"> }</span>
<span class="line" id="L26"> i = <span class="tok-number">1</span>;</span>
<span class="line" id="L27"> <span class="tok-kw">while</span> (i &lt; w - <span class="tok-number">1</span>) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L28"> win.writeCell(i, <span class="tok-number">0</span>, .{ .char = horizontal, .style = style });</span>
<span class="line" id="L29"> win.writeCell(i, h - <span class="tok-number">1</span>, .{ .char = horizontal, .style = style });</span>
<span class="line" id="L30"> }</span>
<span class="line" id="L31"> <span class="tok-kw">return</span> win.initChild(<span class="tok-number">1</span>, <span class="tok-number">1</span>, .{ .limit = w - <span class="tok-number">2</span> }, .{ .limit = w - <span class="tok-number">2</span> });</span>
<span class="line" id="L32">}</span>
<span class="line" id="L33"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Image.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;color.zig&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-comment">// mlarouche: Because this is a interface, I use Zig function naming convention instead of the variable naming convention</span>
</span>
<span class="line" id="L6">format: *<span class="tok-kw">const</span> FormatFn,</span>
<span class="line" id="L7">formatDetect: *<span class="tok-kw">const</span> FormatDetectFn,</span>
<span class="line" id="L8">readImage: *<span class="tok-kw">const</span> ReadImageFn,</span>
<span class="line" id="L9">writeImage: *<span class="tok-kw">const</span> WriteImageFn,</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FormatFn = <span class="tok-kw">fn</span> () Image.Format;</span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FormatDetectFn = <span class="tok-kw">fn</span> (stream: *Image.Stream) Image.ReadError!<span class="tok-type">bool</span>;</span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ReadImageFn = <span class="tok-kw">fn</span> (allocator: std.mem.Allocator, stream: *Image.Stream) Image.ReadError!Image;</span>
<span class="line" id="L14"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> WriteImageFn = <span class="tok-kw">fn</span> (allocator: std.mem.Allocator, write_stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) Image.WriteError!<span class="tok-type">void</span>;</span>
<span class="line" id="L15"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> AllImageFormats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;formats/all.zig&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;color.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Error = <span class="tok-kw">error</span>{</span>
<span class="line" id="L9"> Unsupported,</span>
<span class="line" id="L10">};</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ReadError = Error ||</span>
<span class="line" id="L13"> std.mem.Allocator.Error ||</span>
<span class="line" id="L14"> utils.StructReadError ||</span>
<span class="line" id="L15"> std.io.StreamSource.SeekError ||</span>
<span class="line" id="L16"> std.io.StreamSource.GetSeekPosError ||</span>
<span class="line" id="L17"> <span class="tok-kw">error</span>{ EndOfStream, StreamTooLong, InvalidData };</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> WriteError = Error ||</span>
<span class="line" id="L20"> std.mem.Allocator.Error ||</span>
<span class="line" id="L21"> std.io.StreamSource.WriteError ||</span>
<span class="line" id="L22"> std.io.StreamSource.SeekError ||</span>
<span class="line" id="L23"> std.io.StreamSource.GetSeekPosError ||</span>
<span class="line" id="L24"> std.fs.File.OpenError ||</span>
<span class="line" id="L25"> <span class="tok-kw">error</span>{ EndOfStream, InvalidData };</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Format = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L28"> bmp,</span>
<span class="line" id="L29"> gif,</span>
<span class="line" id="L30"> jpg,</span>
<span class="line" id="L31"> pbm,</span>
<span class="line" id="L32"> pcx,</span>
<span class="line" id="L33"> pgm,</span>
<span class="line" id="L34"> png,</span>
<span class="line" id="L35"> ppm,</span>
<span class="line" id="L36"> qoi,</span>
<span class="line" id="L37"> tga,</span>
<span class="line" id="L38"> pam,</span>
<span class="line" id="L39">};</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Stream = std.io.StreamSource;</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = AllImageFormats.ImageEncoderOptions;</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> AnimationLoopInfinite = -<span class="tok-number">1</span>;</span>
<span class="line" id="L46"></span>
<span class="line" id="L47"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> AnimationFrame = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L48"> pixels: color.PixelStorage,</span>
<span class="line" id="L49"> duration: <span class="tok-type">f32</span>,</span>
<span class="line" id="L50"></span>
<span class="line" id="L51"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: AnimationFrame, allocator: std.mem.Allocator) <span class="tok-type">void</span> {</span>
<span class="line" id="L52"> self.pixels.deinit(allocator);</span>
<span class="line" id="L53"> }</span>
<span class="line" id="L54">};</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Animation = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L57"> frames: FrameList = .{},</span>
<span class="line" id="L58"> loop_count: <span class="tok-type">i32</span> = AnimationLoopInfinite,</span>
<span class="line" id="L59"></span>
<span class="line" id="L60"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> FrameList = std.ArrayListUnmanaged(AnimationFrame);</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Animation, allocator: std.mem.Allocator) <span class="tok-type">void</span> {</span>
<span class="line" id="L63"> <span class="tok-comment">// Animation share its first frame with the pixels in Image, we don't want to free it twice</span>
</span>
<span class="line" id="L64"> <span class="tok-kw">if</span> (self.frames.items.len &gt;= <span class="tok-number">2</span>) {</span>
<span class="line" id="L65"> <span class="tok-kw">for</span> (self.frames.items[<span class="tok-number">1</span>..]) |frame| {</span>
<span class="line" id="L66"> frame.pixels.deinit(allocator);</span>
<span class="line" id="L67"> }</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> self.frames.deinit(allocator);</span>
<span class="line" id="L71"> }</span>
<span class="line" id="L72">};</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"><span class="tok-comment">/// Format-independant image</span></span>
<span class="line" id="L75">allocator: std.mem.Allocator = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L76">width: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L77">height: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L78">pixels: color.PixelStorage = .{ .invalid = <span class="tok-type">void</span>{} },</span>
<span class="line" id="L79">animation: Animation = .{},</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L82"></span>
<span class="line" id="L83"><span class="tok-kw">const</span> FormatInteraceFnType = *<span class="tok-kw">const</span> <span class="tok-kw">fn</span> () FormatInterface;</span>
<span class="line" id="L84"><span class="tok-kw">const</span> all_interface_funcs = blk: {</span>
<span class="line" id="L85"> <span class="tok-kw">const</span> allFormatDecls = std.meta.declarations(AllImageFormats);</span>
<span class="line" id="L86"> <span class="tok-kw">var</span> result: [allFormatDecls.len]FormatInteraceFnType = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L87"> <span class="tok-kw">var</span> index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L88"> <span class="tok-kw">for</span> (allFormatDecls) |decl| {</span>
<span class="line" id="L89"> <span class="tok-kw">const</span> decl_value = <span class="tok-builtin">@field</span>(AllImageFormats, decl.name);</span>
<span class="line" id="L90"> <span class="tok-kw">const</span> entry_type = <span class="tok-builtin">@TypeOf</span>(decl_value);</span>
<span class="line" id="L91"> <span class="tok-kw">if</span> (entry_type == <span class="tok-type">type</span>) {</span>
<span class="line" id="L92"> <span class="tok-kw">const</span> entryTypeInfo = <span class="tok-builtin">@typeInfo</span>(decl_value);</span>
<span class="line" id="L93"> <span class="tok-kw">if</span> (entryTypeInfo == .Struct) {</span>
<span class="line" id="L94"> <span class="tok-kw">for</span> (entryTypeInfo.Struct.decls) |structEntry| {</span>
<span class="line" id="L95"> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, structEntry.name, <span class="tok-str">&quot;formatInterface&quot;</span>)) {</span>
<span class="line" id="L96"> result[index] = <span class="tok-builtin">@field</span>(decl_value, structEntry.name);</span>
<span class="line" id="L97"> index += <span class="tok-number">1</span>;</span>
<span class="line" id="L98"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L99"> }</span>
<span class="line" id="L100"> }</span>
<span class="line" id="L101"> }</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103"> }</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> <span class="tok-kw">break</span> :blk result[<span class="tok-number">0</span>..index];</span>
<span class="line" id="L106">};</span>
<span class="line" id="L107"></span>
<span class="line" id="L108"><span class="tok-comment">/// Init an empty image with no pixel data</span></span>
<span class="line" id="L109"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: std.mem.Allocator) Image {</span>
<span class="line" id="L110"> <span class="tok-kw">return</span> Image{</span>
<span class="line" id="L111"> .allocator = allocator,</span>
<span class="line" id="L112"> };</span>
<span class="line" id="L113">}</span>
<span class="line" id="L114"></span>
<span class="line" id="L115"><span class="tok-comment">/// Deinit the image</span></span>
<span class="line" id="L116"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Image) <span class="tok-type">void</span> {</span>
<span class="line" id="L117"> self.pixels.deinit(self.allocator);</span>
<span class="line" id="L118"> self.animation.deinit(self.allocator);</span>
<span class="line" id="L119">}</span>
<span class="line" id="L120"></span>
<span class="line" id="L121"><span class="tok-comment">/// Load an image from a file path</span></span>
<span class="line" id="L122"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">fromFilePath</span>(allocator: std.mem.Allocator, file_path: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Image {</span>
<span class="line" id="L123"> <span class="tok-kw">var</span> file = <span class="tok-kw">try</span> std.fs.cwd().openFile(file_path, .{});</span>
<span class="line" id="L124"> <span class="tok-kw">defer</span> file.close();</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"> <span class="tok-kw">return</span> fromFile(allocator, &amp;file);</span>
<span class="line" id="L127">}</span>
<span class="line" id="L128"></span>
<span class="line" id="L129"><span class="tok-comment">/// Load an image from a standard library std.fs.File</span></span>
<span class="line" id="L130"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">fromFile</span>(allocator: std.mem.Allocator, file: *std.fs.File) !Image {</span>
<span class="line" id="L131"> <span class="tok-kw">var</span> stream_source = std.io.StreamSource{ .file = file.* };</span>
<span class="line" id="L132"> <span class="tok-kw">return</span> internalRead(allocator, &amp;stream_source);</span>
<span class="line" id="L133">}</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"><span class="tok-comment">/// Load an image from a memory buffer</span></span>
<span class="line" id="L136"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">fromMemory</span>(allocator: std.mem.Allocator, buffer: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Image {</span>
<span class="line" id="L137"> <span class="tok-kw">var</span> stream_source = std.io.StreamSource{ .const_buffer = std.io.fixedBufferStream(buffer) };</span>
<span class="line" id="L138"> <span class="tok-kw">return</span> internalRead(allocator, &amp;stream_source);</span>
<span class="line" id="L139">}</span>
<span class="line" id="L140"></span>
<span class="line" id="L141"><span class="tok-comment">/// Create a pixel surface from scratch</span></span>
<span class="line" id="L142"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">create</span>(allocator: std.mem.Allocator, width: <span class="tok-type">usize</span>, height: <span class="tok-type">usize</span>, pixel_format: PixelFormat) !Image {</span>
<span class="line" id="L143"> <span class="tok-kw">const</span> result = Image{</span>
<span class="line" id="L144"> .allocator = allocator,</span>
<span class="line" id="L145"> .width = width,</span>
<span class="line" id="L146"> .height = height,</span>
<span class="line" id="L147"> .pixels = <span class="tok-kw">try</span> color.PixelStorage.init(allocator, pixel_format, width * height),</span>
<span class="line" id="L148"> };</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L151">}</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"><span class="tok-comment">/// Return the pixel format of the image</span></span>
<span class="line" id="L154"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelFormat</span>(self: Image) PixelFormat {</span>
<span class="line" id="L155"> <span class="tok-kw">return</span> std.meta.activeTag(self.pixels);</span>
<span class="line" id="L156">}</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"><span class="tok-comment">/// Return the pixel data as a const byte slice. In case of an animation, it return the pixel data of the first frame.</span></span>
<span class="line" id="L159"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">rawBytes</span>(self: Image) []<span class="tok-kw">const</span> <span class="tok-type">u8</span> {</span>
<span class="line" id="L160"> <span class="tok-kw">return</span> self.pixels.asBytes();</span>
<span class="line" id="L161">}</span>
<span class="line" id="L162"></span>
<span class="line" id="L163"><span class="tok-comment">/// Return the byte size of a row in the image</span></span>
<span class="line" id="L164"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">rowByteSize</span>(self: Image) <span class="tok-type">usize</span> {</span>
<span class="line" id="L165"> <span class="tok-kw">return</span> self.imageByteSize() / self.height;</span>
<span class="line" id="L166">}</span>
<span class="line" id="L167"></span>
<span class="line" id="L168"><span class="tok-comment">/// Return the byte size of the whole image</span></span>
<span class="line" id="L169"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">imageByteSize</span>(self: Image) <span class="tok-type">usize</span> {</span>
<span class="line" id="L170"> <span class="tok-kw">return</span> self.rawBytes().len;</span>
<span class="line" id="L171">}</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"><span class="tok-comment">/// Is this image is an animation?</span></span>
<span class="line" id="L174"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAnimation</span>(self: Image) <span class="tok-type">bool</span> {</span>
<span class="line" id="L175"> <span class="tok-kw">return</span> self.animation.frames.items.len &gt; <span class="tok-number">0</span>;</span>
<span class="line" id="L176">}</span>
<span class="line" id="L177"></span>
<span class="line" id="L178"><span class="tok-comment">/// Write the image to an image format to the specified path</span></span>
<span class="line" id="L179"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeToFilePath</span>(self: Image, file_path: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, encoder_options: EncoderOptions) WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L180"> <span class="tok-kw">var</span> file = <span class="tok-kw">try</span> std.fs.cwd().createFile(file_path, .{});</span>
<span class="line" id="L181"> <span class="tok-kw">defer</span> file.close();</span>
<span class="line" id="L182"></span>
<span class="line" id="L183"> <span class="tok-kw">try</span> self.writeToFile(file, encoder_options);</span>
<span class="line" id="L184">}</span>
<span class="line" id="L185"></span>
<span class="line" id="L186"><span class="tok-comment">/// Write the image to an image format to the specified std.fs.File</span></span>
<span class="line" id="L187"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeToFile</span>(self: Image, file: std.fs.File, encoder_options: EncoderOptions) WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L188"> <span class="tok-kw">var</span> stream_source = std.io.StreamSource{ .file = file };</span>
<span class="line" id="L189"></span>
<span class="line" id="L190"> <span class="tok-kw">try</span> self.internalWrite(&amp;stream_source, encoder_options);</span>
<span class="line" id="L191">}</span>
<span class="line" id="L192"></span>
<span class="line" id="L193"><span class="tok-comment">/// Write the image to an image format in a memory buffer. The memory buffer is not grown</span></span>
<span class="line" id="L194"><span class="tok-comment">/// for you so make sure you pass a large enough buffer.</span></span>
<span class="line" id="L195"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeToMemory</span>(self: Image, write_buffer: []<span class="tok-type">u8</span>, encoder_options: EncoderOptions) WriteError![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L196"> <span class="tok-kw">var</span> stream_source = std.io.StreamSource{ .buffer = std.io.fixedBufferStream(write_buffer) };</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">try</span> self.internalWrite(&amp;stream_source, encoder_options);</span>
<span class="line" id="L199"></span>
<span class="line" id="L200"> <span class="tok-kw">return</span> stream_source.buffer.getWritten();</span>
<span class="line" id="L201">}</span>
<span class="line" id="L202"></span>
<span class="line" id="L203"><span class="tok-comment">/// Iterate the pixel in pixel-format agnostic way. In the case of an animation, it returns an iterator for the first frame. The iterator is read-only.</span></span>
<span class="line" id="L204"><span class="tok-comment">// FIXME: *const Image is a workaround for a stage2 bug because determining the pass a parameter by value or pointer depending of the size is not mature yet</span>
</span>
<span class="line" id="L205"><span class="tok-comment">// and fails. For now we are explictly requesting to access only a const pointer.</span>
</span>
<span class="line" id="L206"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">iterator</span>(self: *<span class="tok-kw">const</span> Image) color.PixelStorageIterator {</span>
<span class="line" id="L207"> <span class="tok-kw">return</span> color.PixelStorageIterator.init(&amp;self.pixels);</span>
<span class="line" id="L208">}</span>
<span class="line" id="L209"></span>
<span class="line" id="L210"><span class="tok-kw">fn</span> <span class="tok-fn">internalRead</span>(allocator: std.mem.Allocator, stream: *Stream) !Image {</span>
<span class="line" id="L211"> <span class="tok-kw">const</span> format_interface = <span class="tok-kw">try</span> findImageInterfaceFromStream(stream);</span>
<span class="line" id="L212"></span>
<span class="line" id="L213"> <span class="tok-kw">try</span> stream.seekTo(<span class="tok-number">0</span>);</span>
<span class="line" id="L214"></span>
<span class="line" id="L215"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> format_interface.readImage(allocator, stream);</span>
<span class="line" id="L216">}</span>
<span class="line" id="L217"></span>
<span class="line" id="L218"><span class="tok-kw">fn</span> <span class="tok-fn">internalWrite</span>(self: Image, stream: *Stream, encoder_options: EncoderOptions) WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L219"> <span class="tok-kw">const</span> image_format = std.meta.activeTag(encoder_options);</span>
<span class="line" id="L220"></span>
<span class="line" id="L221"> <span class="tok-kw">var</span> format_interface = <span class="tok-kw">try</span> findImageInterfaceFromImageFormat(image_format);</span>
<span class="line" id="L222"></span>
<span class="line" id="L223"> <span class="tok-kw">try</span> format_interface.writeImage(self.allocator, stream, self, encoder_options);</span>
<span class="line" id="L224">}</span>
<span class="line" id="L225"></span>
<span class="line" id="L226"><span class="tok-kw">fn</span> <span class="tok-fn">findImageInterfaceFromStream</span>(stream: *Stream) !FormatInterface {</span>
<span class="line" id="L227"> <span class="tok-kw">for</span> (all_interface_funcs) |intefaceFn| {</span>
<span class="line" id="L228"> <span class="tok-kw">const</span> formatInterface = intefaceFn();</span>
<span class="line" id="L229"></span>
<span class="line" id="L230"> <span class="tok-kw">try</span> stream.seekTo(<span class="tok-number">0</span>);</span>
<span class="line" id="L231"> <span class="tok-kw">const</span> found = <span class="tok-kw">try</span> formatInterface.formatDetect(stream);</span>
<span class="line" id="L232"> <span class="tok-kw">if</span> (found) {</span>
<span class="line" id="L233"> <span class="tok-kw">return</span> formatInterface;</span>
<span class="line" id="L234"> }</span>
<span class="line" id="L235"> }</span>
<span class="line" id="L236"></span>
<span class="line" id="L237"> <span class="tok-kw">return</span> Error.Unsupported;</span>
<span class="line" id="L238">}</span>
<span class="line" id="L239"></span>
<span class="line" id="L240"><span class="tok-kw">fn</span> <span class="tok-fn">findImageInterfaceFromImageFormat</span>(image_format: Format) !FormatInterface {</span>
<span class="line" id="L241"> <span class="tok-kw">for</span> (all_interface_funcs) |interface_fn| {</span>
<span class="line" id="L242"> <span class="tok-kw">const</span> format_interface = interface_fn();</span>
<span class="line" id="L243"></span>
<span class="line" id="L244"> <span class="tok-kw">if</span> (format_interface.format() == image_format) {</span>
<span class="line" id="L245"> <span class="tok-kw">return</span> format_interface;</span>
<span class="line" id="L246"> }</span>
<span class="line" id="L247"> }</span>
<span class="line" id="L248"></span>
<span class="line" id="L249"> <span class="tok-kw">return</span> Error.Unsupported;</span>
<span class="line" id="L250">}</span>
<span class="line" id="L251"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> DefaultBufferSize = <span class="tok-number">8</span> * <span class="tok-number">1024</span>;</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> DefaultBufferedStreamSourceReader = BufferedStreamSourceReader(DefaultBufferSize);</span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> DefaultBufferedStreamSourceWriter = BufferedStreamSourceWriter(DefaultBufferSize);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-comment">// An buffered stream that can read and seek StreamSource</span>
</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">BufferedStreamSourceReader</span>(<span class="tok-kw">comptime</span> BufferSize: <span class="tok-type">usize</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L10"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L11"> buffered_reader: std.io.BufferedReader(BufferSize, std.io.StreamSource.Reader),</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> ReadError = std.io.StreamSource.ReadError;</span>
<span class="line" id="L14"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> SeekError = std.io.StreamSource.SeekError;</span>
<span class="line" id="L15"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> GetSeekPosError = std.io.StreamSource.GetSeekPosError;</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Reader = std.io.Reader(*Self, ReadError, read);</span>
<span class="line" id="L20"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> SeekableStream = std.io.SeekableStream(</span>
<span class="line" id="L21"> *Self,</span>
<span class="line" id="L22"> SeekError,</span>
<span class="line" id="L23"> GetSeekPosError,</span>
<span class="line" id="L24"> seekTo,</span>
<span class="line" id="L25"> seekBy,</span>
<span class="line" id="L26"> getPos,</span>
<span class="line" id="L27"> getEndPos,</span>
<span class="line" id="L28"> );</span>
<span class="line" id="L29"></span>
<span class="line" id="L30"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(self: *Self, dest: []<span class="tok-type">u8</span>) ReadError!<span class="tok-type">usize</span> {</span>
<span class="line" id="L31"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.buffered_reader.unbuffered_reader.context.*) {</span>
<span class="line" id="L32"> .buffer =&gt; |*actual_reader| actual_reader.read(dest),</span>
<span class="line" id="L33"> .const_buffer =&gt; |*actual_reader| actual_reader.read(dest),</span>
<span class="line" id="L34"> .file =&gt; self.buffered_reader.read(dest),</span>
<span class="line" id="L35"> };</span>
<span class="line" id="L36"> }</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">seekTo</span>(self: *Self, pos: <span class="tok-type">u64</span>) SeekError!<span class="tok-type">void</span> {</span>
<span class="line" id="L39"> <span class="tok-kw">switch</span> (self.buffered_reader.unbuffered_reader.context.*) {</span>
<span class="line" id="L40"> .buffer =&gt; |*actual_reader| {</span>
<span class="line" id="L41"> <span class="tok-kw">return</span> actual_reader.seekTo(pos);</span>
<span class="line" id="L42"> },</span>
<span class="line" id="L43"> .const_buffer =&gt; |*actual_reader| {</span>
<span class="line" id="L44"> <span class="tok-kw">return</span> actual_reader.seekTo(pos);</span>
<span class="line" id="L45"> },</span>
<span class="line" id="L46"> .file =&gt; {</span>
<span class="line" id="L47"> <span class="tok-kw">try</span> self.buffered_reader.unbuffered_reader.context.seekTo(pos);</span>
<span class="line" id="L48"> self.resetBufferedReader();</span>
<span class="line" id="L49"> },</span>
<span class="line" id="L50"> }</span>
<span class="line" id="L51"> }</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">seekBy</span>(self: *Self, amt: <span class="tok-type">i64</span>) SeekError!<span class="tok-type">void</span> {</span>
<span class="line" id="L54"> <span class="tok-kw">switch</span> (self.buffered_reader.unbuffered_reader.context.*) {</span>
<span class="line" id="L55"> .buffer =&gt; |*actual_reader| {</span>
<span class="line" id="L56"> <span class="tok-kw">return</span> actual_reader.seekBy(amt);</span>
<span class="line" id="L57"> },</span>
<span class="line" id="L58"> .const_buffer =&gt; |*actual_reader| {</span>
<span class="line" id="L59"> <span class="tok-kw">return</span> actual_reader.seekBy(amt);</span>
<span class="line" id="L60"> },</span>
<span class="line" id="L61"> .file =&gt; {</span>
<span class="line" id="L62"> <span class="tok-kw">const</span> bytes_availables = self.buffered_reader.end - self.buffered_reader.start;</span>
<span class="line" id="L63"> <span class="tok-kw">if</span> (amt &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L64"> <span class="tok-kw">if</span> (amt &lt;= bytes_availables) {</span>
<span class="line" id="L65"> self.buffered_reader.start += <span class="tok-builtin">@intCast</span>(amt);</span>
<span class="line" id="L66"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L67"> <span class="tok-kw">try</span> self.buffered_reader.unbuffered_reader.context.seekBy(amt - <span class="tok-builtin">@as</span>(<span class="tok-type">i64</span>, <span class="tok-builtin">@intCast</span>(bytes_availables)));</span>
<span class="line" id="L68"> self.resetBufferedReader();</span>
<span class="line" id="L69"> }</span>
<span class="line" id="L70"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (amt &lt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L71"> <span class="tok-kw">const</span> absolute_amt = <span class="tok-builtin">@abs</span>(amt);</span>
<span class="line" id="L72"> <span class="tok-kw">if</span> (absolute_amt &lt;= self.buffered_reader.start) {</span>
<span class="line" id="L73"> self.buffered_reader.start -%= absolute_amt;</span>
<span class="line" id="L74"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L75"> <span class="tok-kw">try</span> self.buffered_reader.unbuffered_reader.context.seekBy(amt - <span class="tok-builtin">@as</span>(<span class="tok-type">i64</span>, <span class="tok-builtin">@intCast</span>(bytes_availables)));</span>
<span class="line" id="L76"> self.resetBufferedReader();</span>
<span class="line" id="L77"> }</span>
<span class="line" id="L78"> }</span>
<span class="line" id="L79"> },</span>
<span class="line" id="L80"> }</span>
<span class="line" id="L81"> }</span>
<span class="line" id="L82"></span>
<span class="line" id="L83"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getEndPos</span>(self: *Self) GetSeekPosError!<span class="tok-type">u64</span> {</span>
<span class="line" id="L84"> <span class="tok-kw">return</span> self.buffered_reader.unbuffered_reader.context.getEndPos();</span>
<span class="line" id="L85"> }</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getPos</span>(self: *Self) GetSeekPosError!<span class="tok-type">u64</span> {</span>
<span class="line" id="L88"> <span class="tok-kw">switch</span> (self.buffered_reader.unbuffered_reader.context.*) {</span>
<span class="line" id="L89"> .buffer =&gt; |*actual_reader| {</span>
<span class="line" id="L90"> <span class="tok-kw">return</span> actual_reader.getPos();</span>
<span class="line" id="L91"> },</span>
<span class="line" id="L92"> .const_buffer =&gt; |*actual_reader| {</span>
<span class="line" id="L93"> <span class="tok-kw">return</span> actual_reader.getPos();</span>
<span class="line" id="L94"> },</span>
<span class="line" id="L95"> .file =&gt; {</span>
<span class="line" id="L96"> <span class="tok-kw">if</span> (self.buffered_reader.unbuffered_reader.context.getPos()) |position| {</span>
<span class="line" id="L97"> <span class="tok-kw">return</span> position - (self.buffered_reader.end - self.buffered_reader.start);</span>
<span class="line" id="L98"> } <span class="tok-kw">else</span> |err| {</span>
<span class="line" id="L99"> <span class="tok-kw">return</span> err;</span>
<span class="line" id="L100"> }</span>
<span class="line" id="L101"> },</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103"> }</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">reader</span>(self: *Self) Reader {</span>
<span class="line" id="L106"> <span class="tok-kw">return</span> .{ .context = self };</span>
<span class="line" id="L107"> }</span>
<span class="line" id="L108"></span>
<span class="line" id="L109"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">seekableStream</span>(self: *Self) SeekableStream {</span>
<span class="line" id="L110"> <span class="tok-kw">return</span> .{ .context = self };</span>
<span class="line" id="L111"> }</span>
<span class="line" id="L112"></span>
<span class="line" id="L113"> <span class="tok-kw">fn</span> <span class="tok-fn">resetBufferedReader</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L114"> self.buffered_reader.start = <span class="tok-number">0</span>;</span>
<span class="line" id="L115"> self.buffered_reader.end = <span class="tok-number">0</span>;</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"> };</span>
<span class="line" id="L118">}</span>
<span class="line" id="L119"></span>
<span class="line" id="L120"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">bufferedStreamSourceReader</span>(stream: *std.io.StreamSource) BufferedStreamSourceReader(DefaultBufferSize) {</span>
<span class="line" id="L121"> <span class="tok-kw">return</span> .{ .buffered_reader = .{ .unbuffered_reader = stream.reader() } };</span>
<span class="line" id="L122">}</span>
<span class="line" id="L123"></span>
<span class="line" id="L124"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">bufferedStreamSourceReaderWithSize</span>(<span class="tok-kw">comptime</span> buffer_size: <span class="tok-type">usize</span>, stream: *std.io.StreamSource) BufferedStreamSourceReader(buffer_size) {</span>
<span class="line" id="L125"> <span class="tok-kw">return</span> .{ .buffered_reader = .{ .unbuffered_reader = stream.reader() } };</span>
<span class="line" id="L126">}</span>
<span class="line" id="L127"></span>
<span class="line" id="L128"><span class="tok-comment">// An buffered stream that can writer and seek StreamSource</span>
</span>
<span class="line" id="L129"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">BufferedStreamSourceWriter</span>(<span class="tok-kw">comptime</span> BufferSize: <span class="tok-type">usize</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L130"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L131"> buffered_writer: std.io.BufferedWriter(BufferSize, std.io.StreamSource.Writer),</span>
<span class="line" id="L132"></span>
<span class="line" id="L133"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> WriteError = std.io.StreamSource.WriteError;</span>
<span class="line" id="L134"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> SeekError = std.io.StreamSource.SeekError;</span>
<span class="line" id="L135"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> GetSeekPosError = std.io.StreamSource.GetSeekPosError;</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L138"></span>
<span class="line" id="L139"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Writer = std.io.Writer(*Self, WriteError, write);</span>
<span class="line" id="L140"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> SeekableStream = std.io.SeekableStream(</span>
<span class="line" id="L141"> *Self,</span>
<span class="line" id="L142"> SeekError,</span>
<span class="line" id="L143"> GetSeekPosError,</span>
<span class="line" id="L144"> seekTo,</span>
<span class="line" id="L145"> seekBy,</span>
<span class="line" id="L146"> getPos,</span>
<span class="line" id="L147"> getEndPos,</span>
<span class="line" id="L148"> );</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: *Self, bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) WriteError!<span class="tok-type">usize</span> {</span>
<span class="line" id="L151"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.buffered_writer.unbuffered_writer.context.*) {</span>
<span class="line" id="L152"> .buffer =&gt; |*actual_writer| actual_writer.write(bytes),</span>
<span class="line" id="L153"> .const_buffer =&gt; <span class="tok-kw">error</span>.AccessDenied,</span>
<span class="line" id="L154"> .file =&gt; self.buffered_writer.write(bytes),</span>
<span class="line" id="L155"> };</span>
<span class="line" id="L156"> }</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">seekTo</span>(self: *Self, pos: <span class="tok-type">u64</span>) SeekError!<span class="tok-type">void</span> {</span>
<span class="line" id="L159"> <span class="tok-kw">switch</span> (self.buffered_writer.unbuffered_writer.context.*) {</span>
<span class="line" id="L160"> .buffer =&gt; |*actual_writer| {</span>
<span class="line" id="L161"> <span class="tok-kw">return</span> actual_writer.seekTo(pos);</span>
<span class="line" id="L162"> },</span>
<span class="line" id="L163"> .const_buffer =&gt; |*actual_writer| {</span>
<span class="line" id="L164"> <span class="tok-kw">return</span> actual_writer.seekTo(pos);</span>
<span class="line" id="L165"> },</span>
<span class="line" id="L166"> .file =&gt; {</span>
<span class="line" id="L167"> <span class="tok-kw">try</span> self.buffered_writer.flush();</span>
<span class="line" id="L168"> <span class="tok-kw">try</span> self.buffered_writer.buffered_writer.context.seekTo(pos);</span>
<span class="line" id="L169"> },</span>
<span class="line" id="L170"> }</span>
<span class="line" id="L171"> }</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">seekBy</span>(self: *Self, amt: <span class="tok-type">i64</span>) SeekError!<span class="tok-type">void</span> {</span>
<span class="line" id="L174"> <span class="tok-kw">switch</span> (self.buffered_writer.unbuffered_writer.context.*) {</span>
<span class="line" id="L175"> .buffer =&gt; |*actual_writer| {</span>
<span class="line" id="L176"> <span class="tok-kw">return</span> actual_writer.seekBy(amt);</span>
<span class="line" id="L177"> },</span>
<span class="line" id="L178"> .const_buffer =&gt; |*actual_writer| {</span>
<span class="line" id="L179"> <span class="tok-kw">return</span> actual_writer.seekBy(amt);</span>
<span class="line" id="L180"> },</span>
<span class="line" id="L181"> .file =&gt; {</span>
<span class="line" id="L182"> <span class="tok-kw">if</span> (amt &lt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L183"> <span class="tok-kw">const</span> abs_amt = <span class="tok-builtin">@abs</span>(amt);</span>
<span class="line" id="L184"> <span class="tok-kw">if</span> (abs_amt &lt;= self.buffered_writer.end) {</span>
<span class="line" id="L185"> self.buffered_writer.end -= abs_amt;</span>
<span class="line" id="L186"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L187"> self.buffered_writer.flush() <span class="tok-kw">catch</span> {</span>
<span class="line" id="L188"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unseekable;</span>
<span class="line" id="L189"> };</span>
<span class="line" id="L190"> <span class="tok-kw">try</span> self.buffered_writer.unbuffered_writer.context.seekBy(amt);</span>
<span class="line" id="L191"> }</span>
<span class="line" id="L192"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L193"> <span class="tok-kw">const</span> amt_usize: <span class="tok-type">usize</span> = <span class="tok-builtin">@intCast</span>(amt);</span>
<span class="line" id="L194"></span>
<span class="line" id="L195"> <span class="tok-kw">if</span> (self.buffered_writer.end + amt_usize &lt; self.buffered_writer.buf.len) {</span>
<span class="line" id="L196"> self.buffered_writer.end += amt_usize;</span>
<span class="line" id="L197"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L198"> self.buffered_writer.flush() <span class="tok-kw">catch</span> {</span>
<span class="line" id="L199"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unseekable;</span>
<span class="line" id="L200"> };</span>
<span class="line" id="L201"> <span class="tok-kw">try</span> self.buffered_writer.unbuffered_writer.context.seekBy(amt);</span>
<span class="line" id="L202"> }</span>
<span class="line" id="L203"> }</span>
<span class="line" id="L204"> },</span>
<span class="line" id="L205"> }</span>
<span class="line" id="L206"> }</span>
<span class="line" id="L207"></span>
<span class="line" id="L208"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getEndPos</span>(self: *Self) GetSeekPosError!<span class="tok-type">u64</span> {</span>
<span class="line" id="L209"> <span class="tok-kw">return</span> self.buffered_writer.unbuffered_writer.context.getEndPos();</span>
<span class="line" id="L210"> }</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getPos</span>(self: *Self) GetSeekPosError!<span class="tok-type">u64</span> {</span>
<span class="line" id="L213"> <span class="tok-kw">switch</span> (self.buffered_writer.unbuffered_writer.context.*) {</span>
<span class="line" id="L214"> .buffer =&gt; |*actual_writer| {</span>
<span class="line" id="L215"> <span class="tok-kw">return</span> actual_writer.getPos();</span>
<span class="line" id="L216"> },</span>
<span class="line" id="L217"> .const_buffer =&gt; |*actual_writer| {</span>
<span class="line" id="L218"> <span class="tok-kw">return</span> actual_writer.getPos();</span>
<span class="line" id="L219"> },</span>
<span class="line" id="L220"> .file =&gt; {</span>
<span class="line" id="L221"> <span class="tok-kw">if</span> (self.buffered_writer.unbuffered_writer.context.getPos()) |position| {</span>
<span class="line" id="L222"> <span class="tok-kw">return</span> position + self.buffered_writer.end;</span>
<span class="line" id="L223"> } <span class="tok-kw">else</span> |err| {</span>
<span class="line" id="L224"> <span class="tok-kw">return</span> err;</span>
<span class="line" id="L225"> }</span>
<span class="line" id="L226"> },</span>
<span class="line" id="L227"> }</span>
<span class="line" id="L228"> }</span>
<span class="line" id="L229"></span>
<span class="line" id="L230"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writer</span>(self: *Self) Writer {</span>
<span class="line" id="L231"> <span class="tok-kw">return</span> .{ .context = self };</span>
<span class="line" id="L232"> }</span>
<span class="line" id="L233"></span>
<span class="line" id="L234"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">seekableStream</span>(self: *Self) SeekableStream {</span>
<span class="line" id="L235"> <span class="tok-kw">return</span> .{ .context = self };</span>
<span class="line" id="L236"> }</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">flush</span>(self: *Self) WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L239"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.buffered_writer.unbuffered_writer.context.*) {</span>
<span class="line" id="L240"> .file =&gt; self.buffered_writer.flush(),</span>
<span class="line" id="L241"> <span class="tok-kw">else</span> =&gt; {},</span>
<span class="line" id="L242"> };</span>
<span class="line" id="L243"> }</span>
<span class="line" id="L244"> };</span>
<span class="line" id="L245">}</span>
<span class="line" id="L246"></span>
<span class="line" id="L247"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">bufferedStreamSourceWriter</span>(stream: *std.io.StreamSource) BufferedStreamSourceWriter(DefaultBufferSize) {</span>
<span class="line" id="L248"> <span class="tok-kw">return</span> .{ .buffered_writer = .{ .unbuffered_writer = stream.writer() } };</span>
<span class="line" id="L249">}</span>
<span class="line" id="L250"></span>
<span class="line" id="L251"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">bufferedStreamSourceWriterWithSize</span>(<span class="tok-kw">comptime</span> buffer_size: <span class="tok-type">usize</span>, stream: *std.io.StreamSource) BufferedStreamSourceWriter(buffer_size) {</span>
<span class="line" id="L252"> <span class="tok-kw">return</span> .{ .buffered_writer = .{ .unbuffered_writer = stream.writer() } };</span>
<span class="line" id="L253">}</span>
<span class="line" id="L254"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-comment">// Implement a variable code size LZW decoder with support for clear code and end of information code required for GIF decoding</span>
</span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">Decoder</span>(<span class="tok-kw">comptime</span> endian: std.builtin.Endian) <span class="tok-type">type</span> {</span>
<span class="line" id="L6"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L7"> area_allocator: std.heap.ArenaAllocator,</span>
<span class="line" id="L8"> code_size: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L9"> clear_code: <span class="tok-type">u13</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L10"> initial_code_size: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L11"> end_information_code: <span class="tok-type">u13</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L12"> next_code: <span class="tok-type">u13</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L13"> previous_code: ?<span class="tok-type">u13</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L14"> dictionary: std.AutoArrayHashMap(<span class="tok-type">u13</span>, []<span class="tok-kw">const</span> <span class="tok-type">u8</span>),</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"> remaining_data: ?<span class="tok-type">u13</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L17"> remaining_bits: <span class="tok-type">u4</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"> <span class="tok-kw">const</span> MaxCodeSize = <span class="tok-number">12</span>;</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L22"></span>
<span class="line" id="L23"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: std.mem.Allocator, initial_code_size: <span class="tok-type">u8</span>) !Self {</span>
<span class="line" id="L24"> <span class="tok-kw">var</span> result = Self{</span>
<span class="line" id="L25"> .area_allocator = std.heap.ArenaAllocator.init(allocator),</span>
<span class="line" id="L26"> .code_size = initial_code_size,</span>
<span class="line" id="L27"> .dictionary = std.AutoArrayHashMap(<span class="tok-type">u13</span>, []<span class="tok-kw">const</span> <span class="tok-type">u8</span>).init(allocator),</span>
<span class="line" id="L28"> .initial_code_size = initial_code_size,</span>
<span class="line" id="L29"> .clear_code = <span class="tok-builtin">@as</span>(<span class="tok-type">u13</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(initial_code_size),</span>
<span class="line" id="L30"> .end_information_code = (<span class="tok-builtin">@as</span>(<span class="tok-type">u13</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(initial_code_size)) + <span class="tok-number">1</span>,</span>
<span class="line" id="L31"> .next_code = (<span class="tok-builtin">@as</span>(<span class="tok-type">u13</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(initial_code_size)) + <span class="tok-number">2</span>,</span>
<span class="line" id="L32"> };</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"> <span class="tok-comment">// Reset dictionary and code to its default state</span>
</span>
<span class="line" id="L35"> <span class="tok-kw">try</span> result.resetDictionary();</span>
<span class="line" id="L36"></span>
<span class="line" id="L37"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L38"> }</span>
<span class="line" id="L39"></span>
<span class="line" id="L40"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L41"> self.area_allocator.deinit();</span>
<span class="line" id="L42"> self.dictionary.deinit();</span>
<span class="line" id="L43"> }</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">decode</span>(self: *Self, reader: Image.Stream.Reader, writer: <span class="tok-kw">anytype</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L46"> <span class="tok-kw">var</span> bit_reader = std.io.bitReader(endian, reader);</span>
<span class="line" id="L47"></span>
<span class="line" id="L48"> <span class="tok-kw">var</span> bits_to_read = self.code_size + <span class="tok-number">1</span>;</span>
<span class="line" id="L49"></span>
<span class="line" id="L50"> <span class="tok-kw">var</span> read_size: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L51"> <span class="tok-kw">var</span> read_code: <span class="tok-type">u13</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"> <span class="tok-kw">if</span> (self.remaining_data) |remaining_data| {</span>
<span class="line" id="L54"> <span class="tok-kw">const</span> rest_of_data = <span class="tok-kw">try</span> bit_reader.readBits(<span class="tok-type">u13</span>, self.remaining_bits, &amp;read_size);</span>
<span class="line" id="L55"> <span class="tok-kw">if</span> (read_size &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L56"> <span class="tok-kw">switch</span> (endian) {</span>
<span class="line" id="L57"> .little =&gt; {</span>
<span class="line" id="L58"> read_code = remaining_data | (rest_of_data &lt;&lt; <span class="tok-builtin">@as</span>(<span class="tok-type">u4</span>, <span class="tok-builtin">@intCast</span>(bits_to_read - self.remaining_bits)));</span>
<span class="line" id="L59"> },</span>
<span class="line" id="L60"> .big =&gt; {</span>
<span class="line" id="L61"> read_code = (remaining_data &lt;&lt; self.remaining_bits) | rest_of_data;</span>
<span class="line" id="L62"> },</span>
<span class="line" id="L63"> }</span>
<span class="line" id="L64"> }</span>
<span class="line" id="L65"> self.remaining_data = <span class="tok-null">null</span>;</span>
<span class="line" id="L66"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L67"> read_code = <span class="tok-kw">try</span> bit_reader.readBits(<span class="tok-type">u13</span>, bits_to_read, &amp;read_size);</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">var</span> allocator = self.area_allocator.allocator();</span>
<span class="line" id="L71"></span>
<span class="line" id="L72"> <span class="tok-kw">while</span> (read_size &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L73"> <span class="tok-kw">if</span> (self.dictionary.get(read_code)) |value| {</span>
<span class="line" id="L74"> _ = <span class="tok-kw">try</span> writer.write(value);</span>
<span class="line" id="L75"></span>
<span class="line" id="L76"> <span class="tok-kw">if</span> (self.previous_code) |previous_code| {</span>
<span class="line" id="L77"> <span class="tok-kw">if</span> (self.dictionary.get(previous_code)) |previous_value| {</span>
<span class="line" id="L78"> <span class="tok-kw">var</span> new_value = <span class="tok-kw">try</span> allocator.alloc(<span class="tok-type">u8</span>, previous_value.len + <span class="tok-number">1</span>);</span>
<span class="line" id="L79"> std.mem.copyForwards(<span class="tok-type">u8</span>, new_value, previous_value);</span>
<span class="line" id="L80"> new_value[previous_value.len] = value[<span class="tok-number">0</span>];</span>
<span class="line" id="L81"> <span class="tok-kw">try</span> self.dictionary.put(self.next_code, new_value);</span>
<span class="line" id="L82"></span>
<span class="line" id="L83"> self.next_code += <span class="tok-number">1</span>;</span>
<span class="line" id="L84"></span>
<span class="line" id="L85"> <span class="tok-kw">const</span> max_code = <span class="tok-builtin">@as</span>(<span class="tok-type">u13</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(self.code_size + <span class="tok-number">1</span>);</span>
<span class="line" id="L86"> <span class="tok-kw">if</span> (self.next_code == max_code <span class="tok-kw">and</span> (self.code_size + <span class="tok-number">1</span>) &lt; MaxCodeSize) {</span>
<span class="line" id="L87"> self.code_size += <span class="tok-number">1</span>;</span>
<span class="line" id="L88"> bits_to_read += <span class="tok-number">1</span>;</span>
<span class="line" id="L89"> }</span>
<span class="line" id="L90"> }</span>
<span class="line" id="L91"> }</span>
<span class="line" id="L92"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L93"> <span class="tok-kw">if</span> (read_code == self.clear_code) {</span>
<span class="line" id="L94"> <span class="tok-kw">try</span> self.resetDictionary();</span>
<span class="line" id="L95"> bits_to_read = self.code_size + <span class="tok-number">1</span>;</span>
<span class="line" id="L96"> self.previous_code = read_code;</span>
<span class="line" id="L97"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (read_code == self.end_information_code) {</span>
<span class="line" id="L98"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L99"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L100"> <span class="tok-kw">if</span> (self.previous_code) |previous_code| {</span>
<span class="line" id="L101"> <span class="tok-kw">if</span> (self.dictionary.get(previous_code)) |previous_value| {</span>
<span class="line" id="L102"> <span class="tok-kw">var</span> new_value = <span class="tok-kw">try</span> allocator.alloc(<span class="tok-type">u8</span>, previous_value.len + <span class="tok-number">1</span>);</span>
<span class="line" id="L103"> std.mem.copyForwards(<span class="tok-type">u8</span>, new_value, previous_value);</span>
<span class="line" id="L104"> new_value[previous_value.len] = previous_value[<span class="tok-number">0</span>];</span>
<span class="line" id="L105"> <span class="tok-kw">try</span> self.dictionary.put(self.next_code, new_value);</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"> _ = <span class="tok-kw">try</span> writer.write(new_value);</span>
<span class="line" id="L108"></span>
<span class="line" id="L109"> self.next_code += <span class="tok-number">1</span>;</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"> <span class="tok-kw">const</span> max_code = <span class="tok-builtin">@as</span>(<span class="tok-type">u13</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(self.code_size + <span class="tok-number">1</span>);</span>
<span class="line" id="L112"> <span class="tok-kw">if</span> (self.next_code == max_code <span class="tok-kw">and</span> (self.code_size + <span class="tok-number">1</span>) &lt; MaxCodeSize) {</span>
<span class="line" id="L113"> self.code_size += <span class="tok-number">1</span>;</span>
<span class="line" id="L114"> bits_to_read += <span class="tok-number">1</span>;</span>
<span class="line" id="L115"> }</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"> }</span>
<span class="line" id="L118"> }</span>
<span class="line" id="L119"> }</span>
<span class="line" id="L120"></span>
<span class="line" id="L121"> self.previous_code = read_code;</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"> read_code = <span class="tok-kw">try</span> bit_reader.readBits(<span class="tok-type">u13</span>, bits_to_read, &amp;read_size);</span>
<span class="line" id="L124"> <span class="tok-kw">if</span> (read_size != bits_to_read) {</span>
<span class="line" id="L125"> self.remaining_data = read_code;</span>
<span class="line" id="L126"> self.remaining_bits = <span class="tok-builtin">@intCast</span>(bits_to_read - read_size);</span>
<span class="line" id="L127"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L128"> }</span>
<span class="line" id="L129"> }</span>
<span class="line" id="L130"> }</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"> <span class="tok-kw">fn</span> <span class="tok-fn">resetDictionary</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L133"> self.dictionary.clearRetainingCapacity();</span>
<span class="line" id="L134"> self.area_allocator.deinit();</span>
<span class="line" id="L135"></span>
<span class="line" id="L136"> self.code_size = self.initial_code_size;</span>
<span class="line" id="L137"> self.next_code = (<span class="tok-builtin">@as</span>(<span class="tok-type">u13</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(self.initial_code_size)) + <span class="tok-number">2</span>;</span>
<span class="line" id="L138"></span>
<span class="line" id="L139"> self.area_allocator = std.heap.ArenaAllocator.init(self.area_allocator.child_allocator);</span>
<span class="line" id="L140"> <span class="tok-kw">var</span> allocator = self.area_allocator.allocator();</span>
<span class="line" id="L141"></span>
<span class="line" id="L142"> <span class="tok-kw">const</span> roots_size = <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@intCast</span>(self.code_size);</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> <span class="tok-kw">var</span> index: <span class="tok-type">u13</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L145"></span>
<span class="line" id="L146"> <span class="tok-kw">while</span> (index &lt; roots_size) : (index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L147"> <span class="tok-kw">var</span> data = <span class="tok-kw">try</span> allocator.alloc(<span class="tok-type">u8</span>, <span class="tok-number">1</span>);</span>
<span class="line" id="L148"> data[<span class="tok-number">0</span>] = <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@truncate</span>(index));</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"> <span class="tok-kw">try</span> self.dictionary.put(index, data);</span>
<span class="line" id="L151"> }</span>
<span class="line" id="L152"> }</span>
<span class="line" id="L153"> };</span>
<span class="line" id="L154">}</span>
<span class="line" id="L155"></span>
<span class="line" id="L156"><span class="tok-kw">test</span> <span class="tok-str">&quot;Should decode a simple LZW little-endian stream&quot;</span> {</span>
<span class="line" id="L157"> <span class="tok-kw">const</span> initial_code_size = <span class="tok-number">2</span>;</span>
<span class="line" id="L158"> <span class="tok-kw">const</span> test_data = [_]<span class="tok-type">u8</span>{ <span class="tok-number">0x4c</span>, <span class="tok-number">0x01</span> };</span>
<span class="line" id="L159"></span>
<span class="line" id="L160"> <span class="tok-kw">var</span> reader = Image.Stream{</span>
<span class="line" id="L161"> .const_buffer = std.io.fixedBufferStream(&amp;test_data),</span>
<span class="line" id="L162"> };</span>
<span class="line" id="L163"></span>
<span class="line" id="L164"> <span class="tok-kw">var</span> out_data_storage: [<span class="tok-number">256</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L165"> <span class="tok-kw">var</span> out_data_buffer = Image.Stream{</span>
<span class="line" id="L166"> .buffer = std.io.fixedBufferStream(&amp;out_data_storage),</span>
<span class="line" id="L167"> };</span>
<span class="line" id="L168"></span>
<span class="line" id="L169"> <span class="tok-kw">var</span> lzw = <span class="tok-kw">try</span> Decoder(.little).init(std.testing.allocator, initial_code_size);</span>
<span class="line" id="L170"> <span class="tok-kw">defer</span> lzw.deinit();</span>
<span class="line" id="L171"></span>
<span class="line" id="L172"> <span class="tok-kw">try</span> lzw.decode(reader.reader(), out_data_buffer.writer());</span>
<span class="line" id="L173"></span>
<span class="line" id="L174"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), out_data_buffer.buffer.pos);</span>
<span class="line" id="L175"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-number">1</span>), out_data_storage[<span class="tok-number">0</span>]);</span>
<span class="line" id="L176">}</span>
<span class="line" id="L177"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BMP = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;bmp.zig&quot;</span>).BMP;</span>
<span class="line" id="L2"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> GIF = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;gif.zig&quot;</span>).GIF;</span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> JPEG = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;jpeg.zig&quot;</span>).JPEG;</span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PBM = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;netpbm.zig&quot;</span>).PBM;</span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PCX = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;pcx.zig&quot;</span>).PCX;</span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PGM = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;netpbm.zig&quot;</span>).PGM;</span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PNG = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;png.zig&quot;</span>).PNG;</span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PPM = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;netpbm.zig&quot;</span>).PPM;</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> QOI = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;qoi.zig&quot;</span>).QOI;</span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> TGA = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tga.zig&quot;</span>).TGA;</span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PAM = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;pam.zig&quot;</span>).PAM;</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ImageEncoderOptions = <span class="tok-kw">union</span>(<span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>).Format) {</span>
<span class="line" id="L14"> bmp: BMP.EncoderOptions,</span>
<span class="line" id="L15"> gif: <span class="tok-type">void</span>,</span>
<span class="line" id="L16"> jpg: <span class="tok-type">void</span>,</span>
<span class="line" id="L17"> pbm: PBM.EncoderOptions,</span>
<span class="line" id="L18"> pcx: PCX.EncoderOptions,</span>
<span class="line" id="L19"> pgm: PGM.EncoderOptions,</span>
<span class="line" id="L20"> png: PNG.EncoderOptions,</span>
<span class="line" id="L21"> ppm: PPM.EncoderOptions,</span>
<span class="line" id="L22"> qoi: QOI.EncoderOptions,</span>
<span class="line" id="L23"> tga: TGA.EncoderOptions,</span>
<span class="line" id="L24"> pam: PAM.EncoderOptions,</span>
<span class="line" id="L25">};</span>
<span class="line" id="L26"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../utils.zig&quot;</span>);</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">const</span> BitmapMagicHeader = [_]<span class="tok-type">u8</span>{ <span class="tok-str">'B'</span>, <span class="tok-str">'M'</span> };</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapFileHeader = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L12"> magic_header: [<span class="tok-number">2</span>]<span class="tok-type">u8</span> = BitmapMagicHeader,</span>
<span class="line" id="L13"> size: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L14"> reserved: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L15"> pixel_offset: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L16">};</span>
<span class="line" id="L17"></span>
<span class="line" id="L18"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CompressionMethod = <span class="tok-kw">enum</span>(<span class="tok-type">u32</span>) {</span>
<span class="line" id="L19"> none = <span class="tok-number">0</span>,</span>
<span class="line" id="L20"> rle8 = <span class="tok-number">1</span>,</span>
<span class="line" id="L21"> rle4 = <span class="tok-number">2</span>,</span>
<span class="line" id="L22"> bitfields = <span class="tok-number">3</span>,</span>
<span class="line" id="L23"> jpg = <span class="tok-number">4</span>,</span>
<span class="line" id="L24"> png = <span class="tok-number">5</span>,</span>
<span class="line" id="L25"> alpha_bit_fields = <span class="tok-number">6</span>,</span>
<span class="line" id="L26"> cmyk = <span class="tok-number">11</span>,</span>
<span class="line" id="L27"> cmyk_rle8 = <span class="tok-number">12</span>,</span>
<span class="line" id="L28"> cmyk_rle4 = <span class="tok-number">13</span>,</span>
<span class="line" id="L29">};</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapColorSpace = <span class="tok-kw">enum</span>(<span class="tok-type">u32</span>) {</span>
<span class="line" id="L32"> calibrated_rgb = <span class="tok-number">0</span>,</span>
<span class="line" id="L33"> srgb = utils.toMagicNumber(<span class="tok-str">&quot;sRGB&quot;</span>, .big),</span>
<span class="line" id="L34"> windows_color_space = utils.toMagicNumber(<span class="tok-str">&quot;Win &quot;</span>, .big),</span>
<span class="line" id="L35"> profile_linked = utils.toMagicNumber(<span class="tok-str">&quot;LINK&quot;</span>, .big),</span>
<span class="line" id="L36"> profile_embedded = utils.toMagicNumber(<span class="tok-str">&quot;MBED&quot;</span>, .big),</span>
<span class="line" id="L37">};</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapIntent = <span class="tok-kw">enum</span>(<span class="tok-type">u32</span>) {</span>
<span class="line" id="L40"> business = <span class="tok-number">1</span>,</span>
<span class="line" id="L41"> graphics = <span class="tok-number">2</span>,</span>
<span class="line" id="L42"> images = <span class="tok-number">4</span>,</span>
<span class="line" id="L43"> absolute_colorimetric = <span class="tok-number">8</span>,</span>
<span class="line" id="L44">};</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CieXyz = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L47"> x: <span class="tok-type">u32</span> = <span class="tok-number">0</span>, <span class="tok-comment">// TODO: Use FXPT2DOT30</span>
</span>
<span class="line" id="L48"> y: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L49"> z: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L50">};</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CieXyzTriple = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L53"> red: CieXyz = CieXyz{},</span>
<span class="line" id="L54"> green: CieXyz = CieXyz{},</span>
<span class="line" id="L55"> blue: CieXyz = CieXyz{},</span>
<span class="line" id="L56">};</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapInfoHeaderWindows31 = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L59"> header_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L60"> width: <span class="tok-type">i32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L61"> height: <span class="tok-type">i32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L62"> color_plane: <span class="tok-type">u16</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L63"> bit_count: <span class="tok-type">u16</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L64"> compression_method: CompressionMethod = .none,</span>
<span class="line" id="L65"> image_raw_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L66"> horizontal_resolution: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L67"> vertical_resolution: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L68"> palette_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L69"> important_colors: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L70"></span>
<span class="line" id="L71"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> HeaderSize = <span class="tok-builtin">@sizeOf</span>(BitmapInfoHeaderWindows31);</span>
<span class="line" id="L72">};</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapInfoHeaderV4 = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L75"> header_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L76"> width: <span class="tok-type">i32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L77"> height: <span class="tok-type">i32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L78"> color_plane: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L79"> bit_count: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L80"> compression_method: CompressionMethod = .none,</span>
<span class="line" id="L81"> image_raw_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L82"> horizontal_resolution: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L83"> vertical_resolution: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L84"> palette_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L85"> important_colors: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L86"> red_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L87"> green_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L88"> blue_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L89"> alpha_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L90"> color_space: BitmapColorSpace = .srgb,</span>
<span class="line" id="L91"> cie_end_points: CieXyzTriple = .{},</span>
<span class="line" id="L92"> gamma_red: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L93"> gamma_green: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L94"> gamma_blue: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L95"></span>
<span class="line" id="L96"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> HeaderSize = <span class="tok-builtin">@sizeOf</span>(BitmapInfoHeaderV4);</span>
<span class="line" id="L97">};</span>
<span class="line" id="L98"></span>
<span class="line" id="L99"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapInfoHeaderV5 = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L100"> header_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L101"> width: <span class="tok-type">i32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L102"> height: <span class="tok-type">i32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L103"> color_plane: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L104"> bit_count: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L105"> compression_method: CompressionMethod = .none,</span>
<span class="line" id="L106"> image_raw_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L107"> horizontal_resolution: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L108"> vertical_resolution: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L109"> palette_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L110"> important_colors: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L111"> red_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L112"> green_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L113"> blue_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L114"> alpha_mask: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L115"> color_space: BitmapColorSpace = .srgb,</span>
<span class="line" id="L116"> cie_end_points: CieXyzTriple = .{},</span>
<span class="line" id="L117"> gamma_red: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L118"> gamma_green: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L119"> gamma_blue: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L120"> intent: BitmapIntent = .graphics,</span>
<span class="line" id="L121"> profile_data: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L122"> profile_size: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L123"> reserved: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L124"></span>
<span class="line" id="L125"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> HeaderSize = <span class="tok-builtin">@sizeOf</span>(BitmapInfoHeaderV5);</span>
<span class="line" id="L126">};</span>
<span class="line" id="L127"></span>
<span class="line" id="L128"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BitmapInfoHeader = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L129"> windows31: BitmapInfoHeaderWindows31,</span>
<span class="line" id="L130"> v4: BitmapInfoHeaderV4,</span>
<span class="line" id="L131"> v5: BitmapInfoHeaderV5,</span>
<span class="line" id="L132">};</span>
<span class="line" id="L133"></span>
<span class="line" id="L134"><span class="tok-comment">// Print resolution of the image,</span>
</span>
<span class="line" id="L135"><span class="tok-comment">// 72 DPI × 39.3701 inches per metre yields 2834.6472</span>
</span>
<span class="line" id="L136"><span class="tok-kw">const</span> PixelsPerMeterResolution = <span class="tok-number">2835</span>;</span>
<span class="line" id="L137"></span>
<span class="line" id="L138"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> BMP = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L139"> file_header: BitmapFileHeader = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L140"> info_header: BitmapInfoHeader = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L141"></span>
<span class="line" id="L142"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = <span class="tok-kw">struct</span> {};</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L145"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L146"> .format = format,</span>
<span class="line" id="L147"> .formatDetect = formatDetect,</span>
<span class="line" id="L148"> .readImage = readImage,</span>
<span class="line" id="L149"> .writeImage = writeImage,</span>
<span class="line" id="L150"> };</span>
<span class="line" id="L151"> }</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L154"> <span class="tok-kw">return</span> Image.Format.bmp;</span>
<span class="line" id="L155"> }</span>
<span class="line" id="L156"></span>
<span class="line" id="L157"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) Image.Stream.ReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L158"> <span class="tok-kw">var</span> magic_number_buffer: [<span class="tok-number">2</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L159"> _ = <span class="tok-kw">try</span> stream.read(magic_number_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L160"> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, magic_number_buffer[<span class="tok-number">0</span>..], BitmapMagicHeader[<span class="tok-number">0</span>..])) {</span>
<span class="line" id="L161"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L162"> }</span>
<span class="line" id="L163"></span>
<span class="line" id="L164"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L165"> }</span>
<span class="line" id="L166"></span>
<span class="line" id="L167"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: std.mem.Allocator, stream: *Image.Stream) Image.ReadError!Image {</span>
<span class="line" id="L168"> <span class="tok-kw">var</span> result = Image.init(allocator);</span>
<span class="line" id="L169"> <span class="tok-kw">errdefer</span> result.deinit();</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> <span class="tok-kw">var</span> bmp = BMP{};</span>
<span class="line" id="L172"> <span class="tok-kw">const</span> pixels = <span class="tok-kw">try</span> bmp.read(allocator, stream);</span>
<span class="line" id="L173"></span>
<span class="line" id="L174"> result.width = <span class="tok-builtin">@intCast</span>(bmp.width());</span>
<span class="line" id="L175"> result.height = <span class="tok-builtin">@intCast</span>(bmp.height());</span>
<span class="line" id="L176"> result.pixels = pixels;</span>
<span class="line" id="L177"></span>
<span class="line" id="L178"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L179"> }</span>
<span class="line" id="L180"></span>
<span class="line" id="L181"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: std.mem.Allocator, stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L182"> <span class="tok-kw">var</span> bmp = BMP{};</span>
<span class="line" id="L183"></span>
<span class="line" id="L184"> <span class="tok-comment">// Fill header information based on pixel format</span>
</span>
<span class="line" id="L185"> <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L186"> .bgr24 =&gt; {</span>
<span class="line" id="L187"> bmp.file_header = .{</span>
<span class="line" id="L188"> .size = <span class="tok-builtin">@intCast</span>(image.width * image.height * <span class="tok-number">3</span> + <span class="tok-builtin">@sizeOf</span>(BitmapFileHeader) + BitmapInfoHeaderV4.HeaderSize),</span>
<span class="line" id="L189"> .pixel_offset = <span class="tok-builtin">@sizeOf</span>(BitmapFileHeader) + BitmapInfoHeaderV4.HeaderSize,</span>
<span class="line" id="L190"> };</span>
<span class="line" id="L191"></span>
<span class="line" id="L192"> bmp.info_header = .{</span>
<span class="line" id="L193"> .v4 = .{</span>
<span class="line" id="L194"> .header_size = BitmapInfoHeaderV4.HeaderSize,</span>
<span class="line" id="L195"> .width = <span class="tok-builtin">@intCast</span>(image.width),</span>
<span class="line" id="L196"> .height = <span class="tok-builtin">@intCast</span>(image.height),</span>
<span class="line" id="L197"> .color_plane = <span class="tok-number">1</span>,</span>
<span class="line" id="L198"> .bit_count = <span class="tok-number">24</span>,</span>
<span class="line" id="L199"> .compression_method = .none,</span>
<span class="line" id="L200"> .image_raw_size = <span class="tok-builtin">@intCast</span>(image.width * image.height * <span class="tok-number">3</span>),</span>
<span class="line" id="L201"> .horizontal_resolution = PixelsPerMeterResolution,</span>
<span class="line" id="L202"> .vertical_resolution = PixelsPerMeterResolution,</span>
<span class="line" id="L203"> .color_space = .srgb,</span>
<span class="line" id="L204"> },</span>
<span class="line" id="L205"> };</span>
<span class="line" id="L206"> },</span>
<span class="line" id="L207"> .bgra32 =&gt; {</span>
<span class="line" id="L208"> bmp.file_header = .{</span>
<span class="line" id="L209"> .size = <span class="tok-builtin">@intCast</span>(image.width * image.height * <span class="tok-number">4</span> + <span class="tok-builtin">@sizeOf</span>(BitmapFileHeader) + BitmapInfoHeaderV5.HeaderSize),</span>
<span class="line" id="L210"> .pixel_offset = <span class="tok-builtin">@sizeOf</span>(BitmapFileHeader) + BitmapInfoHeaderV5.HeaderSize,</span>
<span class="line" id="L211"> };</span>
<span class="line" id="L212"></span>
<span class="line" id="L213"> bmp.info_header = .{</span>
<span class="line" id="L214"> .v5 = .{</span>
<span class="line" id="L215"> .header_size = BitmapInfoHeaderV5.HeaderSize,</span>
<span class="line" id="L216"> .width = <span class="tok-builtin">@intCast</span>(image.width),</span>
<span class="line" id="L217"> .height = <span class="tok-builtin">@intCast</span>(image.height),</span>
<span class="line" id="L218"> .color_plane = <span class="tok-number">1</span>,</span>
<span class="line" id="L219"> .bit_count = <span class="tok-number">32</span>,</span>
<span class="line" id="L220"> .compression_method = .bitfields, <span class="tok-comment">// We must specify the color mask when using an 32-bpp bmp with V5</span>
</span>
<span class="line" id="L221"> .image_raw_size = <span class="tok-builtin">@intCast</span>(image.width * image.height * <span class="tok-number">4</span>),</span>
<span class="line" id="L222"> .horizontal_resolution = PixelsPerMeterResolution,</span>
<span class="line" id="L223"> .vertical_resolution = PixelsPerMeterResolution,</span>
<span class="line" id="L224"> .color_space = .srgb,</span>
<span class="line" id="L225"> .red_mask = <span class="tok-number">0x0000FF00</span>,</span>
<span class="line" id="L226"> .green_mask = <span class="tok-number">0x00FF0000</span>,</span>
<span class="line" id="L227"> .blue_mask = <span class="tok-number">0xFF000000</span>,</span>
<span class="line" id="L228"> .alpha_mask = <span class="tok-number">0x000000FF</span>,</span>
<span class="line" id="L229"> },</span>
<span class="line" id="L230"> };</span>
<span class="line" id="L231"> },</span>
<span class="line" id="L232"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L233"> <span class="tok-kw">return</span> Image.WriteError.InvalidData;</span>
<span class="line" id="L234"> },</span>
<span class="line" id="L235"> }</span>
<span class="line" id="L236"></span>
<span class="line" id="L237"> <span class="tok-kw">try</span> bmp.write(stream, image.pixels);</span>
<span class="line" id="L238"></span>
<span class="line" id="L239"> _ = allocator;</span>
<span class="line" id="L240"> _ = encoder_options;</span>
<span class="line" id="L241"> }</span>
<span class="line" id="L242"></span>
<span class="line" id="L243"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">width</span>(self: BMP) <span class="tok-type">i32</span> {</span>
<span class="line" id="L244"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.info_header) {</span>
<span class="line" id="L245"> .windows31 =&gt; |win31| {</span>
<span class="line" id="L246"> <span class="tok-kw">return</span> win31.width;</span>
<span class="line" id="L247"> },</span>
<span class="line" id="L248"> .v4 =&gt; |v4Header| {</span>
<span class="line" id="L249"> <span class="tok-kw">return</span> v4Header.width;</span>
<span class="line" id="L250"> },</span>
<span class="line" id="L251"> .v5 =&gt; |v5Header| {</span>
<span class="line" id="L252"> <span class="tok-kw">return</span> v5Header.width;</span>
<span class="line" id="L253"> },</span>
<span class="line" id="L254"> };</span>
<span class="line" id="L255"> }</span>
<span class="line" id="L256"></span>
<span class="line" id="L257"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">height</span>(self: BMP) <span class="tok-type">i32</span> {</span>
<span class="line" id="L258"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.info_header) {</span>
<span class="line" id="L259"> .windows31 =&gt; |win31| {</span>
<span class="line" id="L260"> <span class="tok-kw">return</span> win31.height;</span>
<span class="line" id="L261"> },</span>
<span class="line" id="L262"> .v4 =&gt; |v4Header| {</span>
<span class="line" id="L263"> <span class="tok-kw">return</span> v4Header.height;</span>
<span class="line" id="L264"> },</span>
<span class="line" id="L265"> .v5 =&gt; |v5Header| {</span>
<span class="line" id="L266"> <span class="tok-kw">return</span> v5Header.height;</span>
<span class="line" id="L267"> },</span>
<span class="line" id="L268"> };</span>
<span class="line" id="L269"> }</span>
<span class="line" id="L270"></span>
<span class="line" id="L271"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelFormat</span>(self: BMP) Image.ReadError!PixelFormat {</span>
<span class="line" id="L272"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.info_header) {</span>
<span class="line" id="L273"> .v4 =&gt; |v4Header| <span class="tok-kw">try</span> findPixelFormat(v4Header.bit_count, v4Header.compression_method),</span>
<span class="line" id="L274"> .v5 =&gt; |v5Header| <span class="tok-kw">try</span> findPixelFormat(v5Header.bit_count, v5Header.compression_method),</span>
<span class="line" id="L275"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> Image.Error.Unsupported,</span>
<span class="line" id="L276"> };</span>
<span class="line" id="L277"> }</span>
<span class="line" id="L278"></span>
<span class="line" id="L279"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(self: *BMP, allocator: std.mem.Allocator, stream: *Image.Stream) Image.ReadError!color.PixelStorage {</span>
<span class="line" id="L280"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L281"></span>
<span class="line" id="L282"> <span class="tok-comment">// Read file header</span>
</span>
<span class="line" id="L283"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L284"> self.file_header = <span class="tok-kw">try</span> utils.readStruct(reader, BitmapFileHeader, .little);</span>
<span class="line" id="L285"> <span class="tok-kw">if</span> (!std.mem.eql(<span class="tok-type">u8</span>, self.file_header.magic_header[<span class="tok-number">0</span>..], BitmapMagicHeader[<span class="tok-number">0</span>..])) {</span>
<span class="line" id="L286"> <span class="tok-kw">return</span> Image.ReadError.InvalidData;</span>
<span class="line" id="L287"> }</span>
<span class="line" id="L288"></span>
<span class="line" id="L289"> <span class="tok-kw">const</span> header_size = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u32</span>, .little);</span>
<span class="line" id="L290"> <span class="tok-kw">try</span> buffered_stream.seekBy(-<span class="tok-builtin">@sizeOf</span>(<span class="tok-type">u32</span>));</span>
<span class="line" id="L291"></span>
<span class="line" id="L292"> <span class="tok-comment">// Read info header</span>
</span>
<span class="line" id="L293"> self.info_header = <span class="tok-kw">switch</span> (header_size) {</span>
<span class="line" id="L294"> BitmapInfoHeaderWindows31.HeaderSize =&gt; BitmapInfoHeader{ .windows31 = <span class="tok-kw">try</span> utils.readStruct(reader, BitmapInfoHeaderWindows31, .little) },</span>
<span class="line" id="L295"> BitmapInfoHeaderV4.HeaderSize =&gt; BitmapInfoHeader{ .v4 = <span class="tok-kw">try</span> utils.readStruct(reader, BitmapInfoHeaderV4, .little) },</span>
<span class="line" id="L296"> BitmapInfoHeaderV5.HeaderSize =&gt; BitmapInfoHeader{ .v5 = <span class="tok-kw">try</span> utils.readStruct(reader, BitmapInfoHeaderV5, .little) },</span>
<span class="line" id="L297"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> Image.Error.Unsupported,</span>
<span class="line" id="L298"> };</span>
<span class="line" id="L299"></span>
<span class="line" id="L300"> <span class="tok-kw">var</span> pixels: color.PixelStorage = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L301"></span>
<span class="line" id="L302"> <span class="tok-comment">// Read pixel data</span>
</span>
<span class="line" id="L303"> _ = <span class="tok-kw">switch</span> (self.info_header) {</span>
<span class="line" id="L304"> .v4 =&gt; |v4Header| {</span>
<span class="line" id="L305"> <span class="tok-kw">const</span> pixel_width = v4Header.width;</span>
<span class="line" id="L306"> <span class="tok-kw">const</span> pixel_height = v4Header.height;</span>
<span class="line" id="L307"> <span class="tok-kw">const</span> pixel_format = <span class="tok-kw">try</span> findPixelFormat(v4Header.bit_count, v4Header.compression_method);</span>
<span class="line" id="L308"></span>
<span class="line" id="L309"> pixels = <span class="tok-kw">try</span> color.PixelStorage.init(allocator, pixel_format, <span class="tok-builtin">@intCast</span>(pixel_width * pixel_height));</span>
<span class="line" id="L310"> <span class="tok-kw">errdefer</span> pixels.deinit(allocator);</span>
<span class="line" id="L311"></span>
<span class="line" id="L312"> <span class="tok-kw">try</span> readPixels(reader, pixel_width, pixel_height, &amp;pixels);</span>
<span class="line" id="L313"> },</span>
<span class="line" id="L314"> .v5 =&gt; |v5Header| {</span>
<span class="line" id="L315"> <span class="tok-kw">const</span> pixel_width = v5Header.width;</span>
<span class="line" id="L316"> <span class="tok-kw">const</span> pixel_height = v5Header.height;</span>
<span class="line" id="L317"> <span class="tok-kw">const</span> pixel_format = <span class="tok-kw">try</span> findPixelFormat(v5Header.bit_count, v5Header.compression_method);</span>
<span class="line" id="L318"></span>
<span class="line" id="L319"> pixels = <span class="tok-kw">try</span> color.PixelStorage.init(allocator, pixel_format, <span class="tok-builtin">@intCast</span>(pixel_width * pixel_height));</span>
<span class="line" id="L320"> <span class="tok-kw">errdefer</span> pixels.deinit(allocator);</span>
<span class="line" id="L321"></span>
<span class="line" id="L322"> <span class="tok-kw">try</span> readPixels(reader, pixel_width, pixel_height, &amp;pixels);</span>
<span class="line" id="L323"> },</span>
<span class="line" id="L324"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> Image.Error.Unsupported,</span>
<span class="line" id="L325"> };</span>
<span class="line" id="L326"></span>
<span class="line" id="L327"> <span class="tok-kw">return</span> pixels;</span>
<span class="line" id="L328"> }</span>
<span class="line" id="L329"></span>
<span class="line" id="L330"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: BMP, stream: *Image.Stream, pixels: color.PixelStorage) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L331"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceWriter(stream);</span>
<span class="line" id="L332"></span>
<span class="line" id="L333"> <span class="tok-kw">const</span> writer = buffered_stream.writer();</span>
<span class="line" id="L334"></span>
<span class="line" id="L335"> <span class="tok-kw">try</span> utils.writeStruct(writer, self.file_header, .little);</span>
<span class="line" id="L336"></span>
<span class="line" id="L337"> <span class="tok-kw">switch</span> (self.info_header) {</span>
<span class="line" id="L338"> .v4 =&gt; |v4| {</span>
<span class="line" id="L339"> <span class="tok-kw">try</span> utils.writeStruct(writer, v4, .little);</span>
<span class="line" id="L340"> },</span>
<span class="line" id="L341"> .v5 =&gt; |v5| {</span>
<span class="line" id="L342"> <span class="tok-kw">try</span> utils.writeStruct(writer, v5, .little);</span>
<span class="line" id="L343"> },</span>
<span class="line" id="L344"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L345"> <span class="tok-kw">return</span> Image.WriteError.InvalidData;</span>
<span class="line" id="L346"> },</span>
<span class="line" id="L347"> }</span>
<span class="line" id="L348"></span>
<span class="line" id="L349"> <span class="tok-kw">try</span> writePixels(writer, pixels, self.width(), self.height());</span>
<span class="line" id="L350"></span>
<span class="line" id="L351"> <span class="tok-kw">try</span> buffered_stream.flush();</span>
<span class="line" id="L352"> }</span>
<span class="line" id="L353"></span>
<span class="line" id="L354"> <span class="tok-kw">fn</span> <span class="tok-fn">findPixelFormat</span>(bit_count: <span class="tok-type">u32</span>, compression: CompressionMethod) Image.Error!PixelFormat {</span>
<span class="line" id="L355"> <span class="tok-kw">if</span> (bit_count == <span class="tok-number">32</span> <span class="tok-kw">and</span> compression == CompressionMethod.bitfields) {</span>
<span class="line" id="L356"> <span class="tok-kw">return</span> PixelFormat.bgra32;</span>
<span class="line" id="L357"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (bit_count == <span class="tok-number">24</span> <span class="tok-kw">and</span> compression == CompressionMethod.none) {</span>
<span class="line" id="L358"> <span class="tok-kw">return</span> PixelFormat.bgr24;</span>
<span class="line" id="L359"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L360"> <span class="tok-kw">return</span> Image.Error.Unsupported;</span>
<span class="line" id="L361"> }</span>
<span class="line" id="L362"> }</span>
<span class="line" id="L363"></span>
<span class="line" id="L364"> <span class="tok-kw">fn</span> <span class="tok-fn">readPixels</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader, pixel_width: <span class="tok-type">i32</span>, pixel_height: <span class="tok-type">i32</span>, pixels: *color.PixelStorage) Image.ReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L365"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (pixels.*) {</span>
<span class="line" id="L366"> .bgr24 =&gt; {</span>
<span class="line" id="L367"> <span class="tok-kw">return</span> readPixelsInternal(pixels.bgr24, reader, pixel_width, pixel_height);</span>
<span class="line" id="L368"> },</span>
<span class="line" id="L369"> .bgra32 =&gt; {</span>
<span class="line" id="L370"> <span class="tok-kw">return</span> readPixelsInternal(pixels.bgra32, reader, pixel_width, pixel_height);</span>
<span class="line" id="L371"> },</span>
<span class="line" id="L372"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L373"> <span class="tok-kw">return</span> Image.Error.Unsupported;</span>
<span class="line" id="L374"> },</span>
<span class="line" id="L375"> };</span>
<span class="line" id="L376"> }</span>
<span class="line" id="L377"></span>
<span class="line" id="L378"> <span class="tok-kw">fn</span> <span class="tok-fn">readPixelsInternal</span>(pixels: <span class="tok-kw">anytype</span>, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader, pixel_width: <span class="tok-type">i32</span>, pixel_height: <span class="tok-type">i32</span>) Image.ReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L379"> <span class="tok-kw">const</span> ColorBufferType = <span class="tok-builtin">@typeInfo</span>(<span class="tok-builtin">@TypeOf</span>(pixels)).Pointer.child;</span>
<span class="line" id="L380"></span>
<span class="line" id="L381"> <span class="tok-kw">var</span> x: <span class="tok-type">i32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L382"> <span class="tok-kw">var</span> y: <span class="tok-type">i32</span> = pixel_height - <span class="tok-number">1</span>;</span>
<span class="line" id="L383"> <span class="tok-kw">while</span> (y &gt;= <span class="tok-number">0</span>) : (y -= <span class="tok-number">1</span>) {</span>
<span class="line" id="L384"> <span class="tok-kw">const</span> scanline = y * pixel_width;</span>
<span class="line" id="L385"></span>
<span class="line" id="L386"> x = <span class="tok-number">0</span>;</span>
<span class="line" id="L387"> <span class="tok-kw">while</span> (x &lt; pixel_width) : (x += <span class="tok-number">1</span>) {</span>
<span class="line" id="L388"> pixels[<span class="tok-builtin">@intCast</span>(scanline + x)] = <span class="tok-kw">try</span> utils.readStruct(reader, ColorBufferType, .little);</span>
<span class="line" id="L389"> }</span>
<span class="line" id="L390"> }</span>
<span class="line" id="L391"> }</span>
<span class="line" id="L392"></span>
<span class="line" id="L393"> <span class="tok-kw">fn</span> <span class="tok-fn">writePixels</span>(writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, pixels: color.PixelStorage, pixel_width: <span class="tok-type">i32</span>, pixel_height: <span class="tok-type">i32</span>) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L394"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L395"> .bgr24 =&gt; {</span>
<span class="line" id="L396"> <span class="tok-kw">return</span> writePixelsInternal(pixels.bgr24, writer, pixel_width, pixel_height);</span>
<span class="line" id="L397"> },</span>
<span class="line" id="L398"> .bgra32 =&gt; {</span>
<span class="line" id="L399"> <span class="tok-kw">return</span> writePixelsInternal(pixels.bgra32, writer, pixel_width, pixel_height);</span>
<span class="line" id="L400"> },</span>
<span class="line" id="L401"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L402"> <span class="tok-kw">return</span> Image.WriteError.InvalidData;</span>
<span class="line" id="L403"> },</span>
<span class="line" id="L404"> };</span>
<span class="line" id="L405"> }</span>
<span class="line" id="L406"></span>
<span class="line" id="L407"> <span class="tok-kw">fn</span> <span class="tok-fn">writePixelsInternal</span>(pixels: <span class="tok-kw">anytype</span>, writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, pixel_width: <span class="tok-type">i32</span>, pixel_height: <span class="tok-type">i32</span>) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L408"> <span class="tok-kw">var</span> x: <span class="tok-type">i32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L409"> <span class="tok-kw">var</span> y: <span class="tok-type">i32</span> = pixel_height - <span class="tok-number">1</span>;</span>
<span class="line" id="L410"> <span class="tok-kw">while</span> (y &gt;= <span class="tok-number">0</span>) : (y -= <span class="tok-number">1</span>) {</span>
<span class="line" id="L411"> <span class="tok-kw">const</span> scanline = y * pixel_width;</span>
<span class="line" id="L412"></span>
<span class="line" id="L413"> x = <span class="tok-number">0</span>;</span>
<span class="line" id="L414"> <span class="tok-kw">while</span> (x &lt; pixel_width) : (x += <span class="tok-number">1</span>) {</span>
<span class="line" id="L415"> <span class="tok-kw">try</span> utils.writeStruct(writer, pixels[<span class="tok-builtin">@intCast</span>(scanline + x)], .little);</span>
<span class="line" id="L416"> }</span>
<span class="line" id="L417"> }</span>
<span class="line" id="L418"> }</span>
<span class="line" id="L419">};</span>
<span class="line" id="L420"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> ImageError = Image.Error;</span>
<span class="line" id="L7"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L8"><span class="tok-kw">const</span> ImageWriteError = Image.WriteError;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L11"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L12"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> FrameHeader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/FrameHeader.zig&quot;</span>);</span>
<span class="line" id="L15"><span class="tok-kw">const</span> JFIFHeader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/JFIFHeader.zig&quot;</span>);</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"><span class="tok-kw">const</span> Markers = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/utils.zig&quot;</span>).Markers;</span>
<span class="line" id="L18"><span class="tok-kw">const</span> ZigzagOffsets = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/utils.zig&quot;</span>).ZigzagOffsets;</span>
<span class="line" id="L19"><span class="tok-kw">const</span> IDCTMultipliers = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/utils.zig&quot;</span>).IDCTMultipliers;</span>
<span class="line" id="L20"><span class="tok-kw">const</span> QuantizationTable = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/quantization.zig&quot;</span>).Table;</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"><span class="tok-kw">const</span> HuffmanReader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/huffman.zig&quot;</span>).Reader;</span>
<span class="line" id="L23"><span class="tok-kw">const</span> HuffmanTable = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/huffman.zig&quot;</span>).Table;</span>
<span class="line" id="L24"><span class="tok-kw">const</span> Frame = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/Frame.zig&quot;</span>);</span>
<span class="line" id="L25"><span class="tok-kw">const</span> Scan = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./jpeg/Scan.zig&quot;</span>);</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"><span class="tok-comment">// TODO: Chroma subsampling</span>
</span>
<span class="line" id="L28"><span class="tok-comment">// TODO: Progressive scans</span>
</span>
<span class="line" id="L29"><span class="tok-comment">// TODO: Non-baseline sequential DCT</span>
</span>
<span class="line" id="L30"><span class="tok-comment">// TODO: Precisions other than 8-bit</span>
</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"><span class="tok-comment">// TODO: Hierarchical mode of JPEG compression.</span>
</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"><span class="tok-kw">const</span> JPEG_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L35"></span>
<span class="line" id="L36"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> JPEG = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L37"> frame: ?Frame = <span class="tok-null">null</span>,</span>
<span class="line" id="L38"> allocator: Allocator,</span>
<span class="line" id="L39"> quantization_tables: [<span class="tok-number">4</span>]?QuantizationTable,</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: Allocator) JPEG {</span>
<span class="line" id="L42"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L43"> .allocator = allocator,</span>
<span class="line" id="L44"> .quantization_tables = [_]?QuantizationTable{<span class="tok-null">null</span>} ** <span class="tok-number">4</span>,</span>
<span class="line" id="L45"> };</span>
<span class="line" id="L46"> }</span>
<span class="line" id="L47"></span>
<span class="line" id="L48"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *JPEG) <span class="tok-type">void</span> {</span>
<span class="line" id="L49"> <span class="tok-kw">if</span> (self.frame) |*frame| {</span>
<span class="line" id="L50"> frame.deinit();</span>
<span class="line" id="L51"> }</span>
<span class="line" id="L52"> }</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-kw">fn</span> <span class="tok-fn">parseDefineQuantizationTables</span>(self: *JPEG, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L55"> <span class="tok-kw">var</span> segment_size = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L56"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;DefineQuantizationTables: segment size = 0x{X}\n&quot;</span>, .{segment_size});</span>
<span class="line" id="L57"> segment_size -= <span class="tok-number">2</span>;</span>
<span class="line" id="L58"></span>
<span class="line" id="L59"> <span class="tok-kw">while</span> (segment_size &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L60"> <span class="tok-kw">const</span> precision_and_destination = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L61"> <span class="tok-kw">const</span> table_precision = precision_and_destination &gt;&gt; <span class="tok-number">4</span>;</span>
<span class="line" id="L62"> <span class="tok-kw">const</span> table_destination = precision_and_destination &amp; <span class="tok-number">0b11</span>;</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> <span class="tok-kw">const</span> quantization_table = <span class="tok-kw">try</span> QuantizationTable.read(table_precision, reader);</span>
<span class="line" id="L65"> <span class="tok-kw">switch</span> (quantization_table) {</span>
<span class="line" id="L66"> .q8 =&gt; segment_size -= <span class="tok-number">64</span> + <span class="tok-number">1</span>,</span>
<span class="line" id="L67"> .q16 =&gt; segment_size -= <span class="tok-number">128</span> + <span class="tok-number">1</span>,</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> self.quantization_tables[table_destination] = quantization_table;</span>
<span class="line" id="L71"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot; Table with precision {} installed at {}\n&quot;</span>, .{ table_precision, table_destination });</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> <span class="tok-kw">fn</span> <span class="tok-fn">parseScan</span>(self: *JPEG, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader, pixels_opt: *?color.PixelStorage) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L76"> <span class="tok-kw">if</span> (self.frame) |frame| {</span>
<span class="line" id="L77"> <span class="tok-kw">try</span> Scan.performScan(&amp;frame, reader, pixels_opt);</span>
<span class="line" id="L78"> } <span class="tok-kw">else</span> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L79"> }</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"> <span class="tok-kw">fn</span> <span class="tok-fn">initializePixels</span>(self: *JPEG, pixels_opt: *?color.PixelStorage) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L82"> <span class="tok-kw">if</span> (self.frame) |frame| {</span>
<span class="line" id="L83"> <span class="tok-kw">var</span> pixel_format: PixelFormat = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L84"> <span class="tok-kw">switch</span> (frame.frame_header.components.len) {</span>
<span class="line" id="L85"> <span class="tok-number">1</span> =&gt; pixel_format = .grayscale8,</span>
<span class="line" id="L86"> <span class="tok-number">3</span> =&gt; pixel_format = .rgb24,</span>
<span class="line" id="L87"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L88"> }</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> <span class="tok-kw">const</span> pixel_count = <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-builtin">@intCast</span>(frame.frame_header.samples_per_row)) * <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-builtin">@intCast</span>(frame.frame_header.row_count));</span>
<span class="line" id="L91"> pixels_opt.* = <span class="tok-kw">try</span> color.PixelStorage.init(self.allocator, pixel_format, pixel_count);</span>
<span class="line" id="L92"> } <span class="tok-kw">else</span> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L93"> }</span>
<span class="line" id="L94"></span>
<span class="line" id="L95"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(self: *JPEG, stream: *Image.Stream, pixels_opt: *?color.PixelStorage) ImageReadError!Frame {</span>
<span class="line" id="L96"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L97"></span>
<span class="line" id="L98"> <span class="tok-kw">const</span> jfif_header = JFIFHeader.read(&amp;buffered_stream) <span class="tok-kw">catch</span> |err| <span class="tok-kw">switch</span> (err) {</span>
<span class="line" id="L99"> <span class="tok-kw">error</span>.App0MarkerDoesNotExist, <span class="tok-kw">error</span>.JfifIdentifierNotSet, <span class="tok-kw">error</span>.ThumbnailImagesUnsupported, <span class="tok-kw">error</span>.ExtraneousApplicationMarker =&gt; <span class="tok-kw">return</span> ImageReadError.InvalidData,</span>
<span class="line" id="L100"> <span class="tok-kw">else</span> =&gt; |e| <span class="tok-kw">return</span> e,</span>
<span class="line" id="L101"> };</span>
<span class="line" id="L102"> _ = jfif_header;</span>
<span class="line" id="L103"></span>
<span class="line" id="L104"> <span class="tok-kw">errdefer</span> {</span>
<span class="line" id="L105"> <span class="tok-kw">if</span> (pixels_opt.*) |pixels| {</span>
<span class="line" id="L106"> pixels.deinit(self.allocator);</span>
<span class="line" id="L107"> pixels_opt.* = <span class="tok-null">null</span>;</span>
<span class="line" id="L108"> }</span>
<span class="line" id="L109"> }</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L112"> <span class="tok-kw">var</span> marker = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L113"> <span class="tok-kw">while</span> (marker != <span class="tok-builtin">@intFromEnum</span>(Markers.end_of_image)) : (marker = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big)) {</span>
<span class="line" id="L114"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;Parsing marker value: 0x{X}\n&quot;</span>, .{marker});</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"> <span class="tok-kw">if</span> (marker &gt;= <span class="tok-builtin">@intFromEnum</span>(Markers.application0) <span class="tok-kw">and</span> marker &lt; <span class="tok-builtin">@intFromEnum</span>(Markers.application0) + <span class="tok-number">16</span>) {</span>
<span class="line" id="L117"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;Skipping application data segment\n&quot;</span>, .{});</span>
<span class="line" id="L118"> <span class="tok-kw">const</span> application_data_length = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L119"> <span class="tok-kw">try</span> buffered_stream.seekBy(application_data_length - <span class="tok-number">2</span>);</span>
<span class="line" id="L120"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L121"> }</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"> <span class="tok-kw">switch</span> (<span class="tok-builtin">@as</span>(Markers, <span class="tok-builtin">@enumFromInt</span>(marker))) {</span>
<span class="line" id="L124"> <span class="tok-comment">// TODO(angelo): this should be moved inside the frameheader, it's part of thet</span>
</span>
<span class="line" id="L125"> <span class="tok-comment">// and then the header just dispatches correctly what to do with it.</span>
</span>
<span class="line" id="L126"> <span class="tok-comment">// JPEG should be as clear as possible</span>
</span>
<span class="line" id="L127"> .sof0 =&gt; { <span class="tok-comment">// Baseline DCT</span>
</span>
<span class="line" id="L128"> <span class="tok-kw">if</span> (self.frame != <span class="tok-null">null</span>) {</span>
<span class="line" id="L129"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L130"> }</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"> self.frame = <span class="tok-kw">try</span> Frame.read(self.allocator, &amp;self.quantization_tables, &amp;buffered_stream);</span>
<span class="line" id="L133"> },</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"> .sof1 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported, <span class="tok-comment">// extended sequential DCT Huffman coding</span>
</span>
<span class="line" id="L136"> .sof2 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported, <span class="tok-comment">// progressive DCT Huffman coding</span>
</span>
<span class="line" id="L137"> .sof3 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported, <span class="tok-comment">// lossless (sequential) Huffman coding</span>
</span>
<span class="line" id="L138"> .sof5 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L139"> .sof6 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L140"> .sof7 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L141"> .sof9 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported, <span class="tok-comment">// extended sequential DCT arithmetic coding</span>
</span>
<span class="line" id="L142"> .sof10 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported, <span class="tok-comment">// progressive DCT arithmetic coding</span>
</span>
<span class="line" id="L143"> .sof11 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported, <span class="tok-comment">// lossless (sequential) arithmetic coding</span>
</span>
<span class="line" id="L144"> .sof13 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L145"> .sof14 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L146"> .sof15 =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L147"></span>
<span class="line" id="L148"> .start_of_scan =&gt; {</span>
<span class="line" id="L149"> <span class="tok-kw">try</span> self.initializePixels(pixels_opt);</span>
<span class="line" id="L150"> <span class="tok-kw">try</span> self.parseScan(reader, pixels_opt);</span>
<span class="line" id="L151"> },</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"> .define_quantization_tables =&gt; {</span>
<span class="line" id="L154"> <span class="tok-kw">try</span> self.parseDefineQuantizationTables(reader);</span>
<span class="line" id="L155"> },</span>
<span class="line" id="L156"></span>
<span class="line" id="L157"> .comment =&gt; {</span>
<span class="line" id="L158"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;Skipping comment segment\n&quot;</span>, .{});</span>
<span class="line" id="L159"></span>
<span class="line" id="L160"> <span class="tok-kw">const</span> comment_length = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L161"> <span class="tok-kw">try</span> buffered_stream.seekBy(comment_length - <span class="tok-number">2</span>);</span>
<span class="line" id="L162"> },</span>
<span class="line" id="L163"></span>
<span class="line" id="L164"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L165"> <span class="tok-comment">// TODO(angelo): raise invalid marker, more precise error.</span>
</span>
<span class="line" id="L166"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L167"> },</span>
<span class="line" id="L168"> }</span>
<span class="line" id="L169"> }</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (self.frame) |frame| frame <span class="tok-kw">else</span> ImageReadError.InvalidData;</span>
<span class="line" id="L172"> }</span>
<span class="line" id="L173"></span>
<span class="line" id="L174"> <span class="tok-comment">// Format interface</span>
</span>
<span class="line" id="L175"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L176"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L177"> .format = format,</span>
<span class="line" id="L178"> .formatDetect = formatDetect,</span>
<span class="line" id="L179"> .readImage = readImage,</span>
<span class="line" id="L180"> .writeImage = writeImage,</span>
<span class="line" id="L181"> };</span>
<span class="line" id="L182"> }</span>
<span class="line" id="L183"></span>
<span class="line" id="L184"> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L185"> <span class="tok-kw">return</span> Image.Format.jpg;</span>
<span class="line" id="L186"> }</span>
<span class="line" id="L187"></span>
<span class="line" id="L188"> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) ImageReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L189"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L190"></span>
<span class="line" id="L191"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L192"> <span class="tok-kw">const</span> maybe_start_of_image = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L193"> <span class="tok-kw">if</span> (maybe_start_of_image != <span class="tok-builtin">@intFromEnum</span>(Markers.start_of_image)) {</span>
<span class="line" id="L194"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L195"> }</span>
<span class="line" id="L196"></span>
<span class="line" id="L197"> <span class="tok-kw">try</span> buffered_stream.seekTo(<span class="tok-number">6</span>);</span>
<span class="line" id="L198"> <span class="tok-kw">var</span> identifier_buffer: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L199"> _ = <span class="tok-kw">try</span> buffered_stream.read(identifier_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L200"></span>
<span class="line" id="L201"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, identifier_buffer[<span class="tok-number">0</span>..], <span class="tok-str">&quot;JFIF&quot;</span>);</span>
<span class="line" id="L202"> }</span>
<span class="line" id="L203"></span>
<span class="line" id="L204"> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: Allocator, stream: *Image.Stream) ImageReadError!Image {</span>
<span class="line" id="L205"> <span class="tok-kw">var</span> result = Image.init(allocator);</span>
<span class="line" id="L206"> <span class="tok-kw">errdefer</span> result.deinit();</span>
<span class="line" id="L207"> <span class="tok-kw">var</span> jpeg = JPEG.init(allocator);</span>
<span class="line" id="L208"> <span class="tok-kw">defer</span> jpeg.deinit();</span>
<span class="line" id="L209"></span>
<span class="line" id="L210"> <span class="tok-kw">var</span> pixels_opt: ?color.PixelStorage = <span class="tok-null">null</span>;</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> <span class="tok-kw">const</span> frame = <span class="tok-kw">try</span> jpeg.read(stream, &amp;pixels_opt);</span>
<span class="line" id="L213"></span>
<span class="line" id="L214"> result.width = frame.frame_header.samples_per_row;</span>
<span class="line" id="L215"> result.height = frame.frame_header.row_count;</span>
<span class="line" id="L216"></span>
<span class="line" id="L217"> <span class="tok-kw">if</span> (pixels_opt) |pixels| {</span>
<span class="line" id="L218"> result.pixels = pixels;</span>
<span class="line" id="L219"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L220"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L221"> }</span>
<span class="line" id="L222"></span>
<span class="line" id="L223"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L224"> }</span>
<span class="line" id="L225"></span>
<span class="line" id="L226"> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: Allocator, write_stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L227"> _ = allocator;</span>
<span class="line" id="L228"> _ = write_stream;</span>
<span class="line" id="L229"> _ = image;</span>
<span class="line" id="L230"> _ = encoder_options;</span>
<span class="line" id="L231"> }</span>
<span class="line" id="L232">};</span>
<span class="line" id="L233"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">const</span> Markers = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).Markers;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> FrameHeader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;FrameHeader.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> QuantizationTable = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;quantization.zig&quot;</span>).Table;</span>
<span class="line" id="L11"><span class="tok-kw">const</span> HuffmanTable = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;huffman.zig&quot;</span>).Table;</span>
<span class="line" id="L12"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../color.zig&quot;</span>);</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> IDCTMultipliers = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).IDCTMultipliers;</span>
<span class="line" id="L15"><span class="tok-kw">const</span> MAX_COMPONENTS = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).MAX_COMPONENTS;</span>
<span class="line" id="L16"><span class="tok-kw">const</span> MAX_BLOCKS = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).MAX_BLOCKS;</span>
<span class="line" id="L17"><span class="tok-kw">const</span> MCU = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).MCU;</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L20">allocator: Allocator,</span>
<span class="line" id="L21">frame_header: FrameHeader,</span>
<span class="line" id="L22">quantization_tables: *[<span class="tok-number">4</span>]?QuantizationTable,</span>
<span class="line" id="L23">dc_huffman_tables: [<span class="tok-number">2</span>]?HuffmanTable,</span>
<span class="line" id="L24">ac_huffman_tables: [<span class="tok-number">2</span>]?HuffmanTable,</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"><span class="tok-kw">const</span> JPEG_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L27"></span>
<span class="line" id="L28"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(allocator: Allocator, quantization_tables: *[<span class="tok-number">4</span>]?QuantizationTable, buffered_stream: *buffered_stream_source.DefaultBufferedStreamSourceReader) ImageReadError!Self {</span>
<span class="line" id="L29"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L30"> <span class="tok-kw">const</span> frame_header = <span class="tok-kw">try</span> FrameHeader.read(allocator, reader);</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"> <span class="tok-kw">var</span> self = Self{</span>
<span class="line" id="L33"> .allocator = allocator,</span>
<span class="line" id="L34"> .frame_header = frame_header,</span>
<span class="line" id="L35"> .quantization_tables = quantization_tables,</span>
<span class="line" id="L36"> .dc_huffman_tables = [_]?HuffmanTable{<span class="tok-null">null</span>} ** <span class="tok-number">2</span>,</span>
<span class="line" id="L37"> .ac_huffman_tables = [_]?HuffmanTable{<span class="tok-null">null</span>} ** <span class="tok-number">2</span>,</span>
<span class="line" id="L38"> };</span>
<span class="line" id="L39"> <span class="tok-kw">errdefer</span> self.deinit();</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"> <span class="tok-kw">var</span> marker = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L42"> <span class="tok-kw">while</span> (marker != <span class="tok-builtin">@intFromEnum</span>(Markers.start_of_scan)) : (marker = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big)) {</span>
<span class="line" id="L43"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;Frame: Parsing marker value: 0x{X}\n&quot;</span>, .{marker});</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"> <span class="tok-kw">switch</span> (<span class="tok-builtin">@as</span>(Markers, <span class="tok-builtin">@enumFromInt</span>(marker))) {</span>
<span class="line" id="L46"> .define_huffman_tables =&gt; {</span>
<span class="line" id="L47"> <span class="tok-kw">try</span> self.parseDefineHuffmanTables(reader);</span>
<span class="line" id="L48"> },</span>
<span class="line" id="L49"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L50"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L51"> },</span>
<span class="line" id="L52"> }</span>
<span class="line" id="L53"> }</span>
<span class="line" id="L54"></span>
<span class="line" id="L55"> <span class="tok-comment">// Undo the last marker read</span>
</span>
<span class="line" id="L56"> <span class="tok-kw">try</span> buffered_stream.seekBy(-<span class="tok-number">2</span>);</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L59">}</span>
<span class="line" id="L60"></span>
<span class="line" id="L61"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L62"> <span class="tok-kw">for</span> (&amp;self.dc_huffman_tables) |*maybe_huffman_table| {</span>
<span class="line" id="L63"> <span class="tok-kw">if</span> (maybe_huffman_table.*) |*huffman_table| {</span>
<span class="line" id="L64"> huffman_table.deinit();</span>
<span class="line" id="L65"> }</span>
<span class="line" id="L66"> }</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> <span class="tok-kw">for</span> (&amp;self.ac_huffman_tables) |*maybe_huffman_table| {</span>
<span class="line" id="L69"> <span class="tok-kw">if</span> (maybe_huffman_table.*) |*huffman_table| {</span>
<span class="line" id="L70"> huffman_table.deinit();</span>
<span class="line" id="L71"> }</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"> self.frame_header.deinit();</span>
<span class="line" id="L75">}</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"><span class="tok-kw">fn</span> <span class="tok-fn">parseDefineHuffmanTables</span>(self: *Self, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L78"> <span class="tok-kw">var</span> segment_size = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L79"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;DefineHuffmanTables: segment size = 0x{X}\n&quot;</span>, .{segment_size});</span>
<span class="line" id="L80"> segment_size -= <span class="tok-number">2</span>;</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"> <span class="tok-kw">while</span> (segment_size &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L83"> <span class="tok-kw">const</span> class_and_destination = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L84"> <span class="tok-kw">const</span> table_class = class_and_destination &gt;&gt; <span class="tok-number">4</span>;</span>
<span class="line" id="L85"> <span class="tok-kw">const</span> table_destination = class_and_destination &amp; <span class="tok-number">0b1</span>;</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> <span class="tok-kw">const</span> huffman_table = <span class="tok-kw">try</span> HuffmanTable.read(self.allocator, table_class, reader);</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"> <span class="tok-kw">if</span> (table_class == <span class="tok-number">0</span>) {</span>
<span class="line" id="L90"> <span class="tok-kw">if</span> (self.dc_huffman_tables[table_destination]) |*old_huffman_table| {</span>
<span class="line" id="L91"> old_huffman_table.deinit();</span>
<span class="line" id="L92"> }</span>
<span class="line" id="L93"> self.dc_huffman_tables[table_destination] = huffman_table;</span>
<span class="line" id="L94"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L95"> <span class="tok-kw">if</span> (self.ac_huffman_tables[table_destination]) |*old_huffman_table| {</span>
<span class="line" id="L96"> old_huffman_table.deinit();</span>
<span class="line" id="L97"> }</span>
<span class="line" id="L98"> self.ac_huffman_tables[table_destination] = huffman_table;</span>
<span class="line" id="L99"> }</span>
<span class="line" id="L100"></span>
<span class="line" id="L101"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot; Table with class {} installed at {}\n&quot;</span>, .{ table_class, table_destination });</span>
<span class="line" id="L102"></span>
<span class="line" id="L103"> <span class="tok-comment">// Class+Destination + code counts + code table</span>
</span>
<span class="line" id="L104"> segment_size -= <span class="tok-number">1</span> + <span class="tok-number">16</span> + <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>(huffman_table.code_map.count()));</span>
<span class="line" id="L105"> }</span>
<span class="line" id="L106">}</span>
<span class="line" id="L107"></span>
<span class="line" id="L108"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">renderToPixels</span>(self: *<span class="tok-kw">const</span> Self, mcu_storage: *[MAX_COMPONENTS][MAX_BLOCKS]MCU, mcu_id: <span class="tok-type">usize</span>, pixels: *color.PixelStorage) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L109"> <span class="tok-kw">switch</span> (self.frame_header.components.len) {</span>
<span class="line" id="L110"> <span class="tok-number">1</span> =&gt; <span class="tok-kw">try</span> self.renderToPixelsGrayscale(&amp;mcu_storage[<span class="tok-number">0</span>][<span class="tok-number">0</span>], mcu_id, pixels.grayscale8), <span class="tok-comment">// Grayscale images is non-interleaved</span>
</span>
<span class="line" id="L111"> <span class="tok-number">3</span> =&gt; <span class="tok-kw">try</span> self.renderToPixelsRgb(mcu_storage, mcu_id, pixels.rgb24),</span>
<span class="line" id="L112"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L113"> }</span>
<span class="line" id="L114">}</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"><span class="tok-kw">fn</span> <span class="tok-fn">renderToPixelsGrayscale</span>(self: *<span class="tok-kw">const</span> Self, mcu_storage: *MCU, mcu_id: <span class="tok-type">usize</span>, pixels: []color.Grayscale8) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L117"> <span class="tok-kw">const</span> mcu_width = <span class="tok-number">8</span>;</span>
<span class="line" id="L118"> <span class="tok-kw">const</span> mcu_height = <span class="tok-number">8</span>;</span>
<span class="line" id="L119"> <span class="tok-kw">const</span> width = self.frame_header.samples_per_row;</span>
<span class="line" id="L120"> <span class="tok-kw">const</span> height = pixels.len / width;</span>
<span class="line" id="L121"> <span class="tok-kw">const</span> mcus_per_row = (width + mcu_width - <span class="tok-number">1</span>) / mcu_width;</span>
<span class="line" id="L122"> <span class="tok-kw">const</span> mcu_origin_x = (mcu_id % mcus_per_row) * mcu_width;</span>
<span class="line" id="L123"> <span class="tok-kw">const</span> mcu_origin_y = (mcu_id / mcus_per_row) * mcu_height;</span>
<span class="line" id="L124"></span>
<span class="line" id="L125"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..mcu_height) |mcu_y| {</span>
<span class="line" id="L126"> <span class="tok-kw">const</span> y = mcu_origin_y + mcu_y;</span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (y &gt;= height) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L128"></span>
<span class="line" id="L129"> <span class="tok-comment">// y coordinates in the block</span>
</span>
<span class="line" id="L130"> <span class="tok-kw">const</span> block_y = mcu_y % <span class="tok-number">8</span>;</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"> <span class="tok-kw">const</span> stride = y * width;</span>
<span class="line" id="L133"></span>
<span class="line" id="L134"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..mcu_width) |mcu_x| {</span>
<span class="line" id="L135"> <span class="tok-kw">const</span> x = mcu_origin_x + mcu_x;</span>
<span class="line" id="L136"> <span class="tok-kw">if</span> (x &gt;= width) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L137"></span>
<span class="line" id="L138"> <span class="tok-comment">// x coordinates in the block</span>
</span>
<span class="line" id="L139"> <span class="tok-kw">const</span> block_x = mcu_x % <span class="tok-number">8</span>;</span>
<span class="line" id="L140"></span>
<span class="line" id="L141"> <span class="tok-kw">const</span> reconstructed_Y = idct(mcu_storage, <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(block_x)), <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(block_y)), mcu_id, <span class="tok-number">0</span>);</span>
<span class="line" id="L142"> <span class="tok-kw">const</span> Y: <span class="tok-type">f32</span> = <span class="tok-builtin">@floatFromInt</span>(reconstructed_Y);</span>
<span class="line" id="L143"> pixels[stride + x] = .{</span>
<span class="line" id="L144"> .value = <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intFromFloat</span>(std.math.clamp(Y + <span class="tok-number">128.0</span>, <span class="tok-number">0.0</span>, <span class="tok-number">255.0</span>))),</span>
<span class="line" id="L145"> };</span>
<span class="line" id="L146"> }</span>
<span class="line" id="L147"> }</span>
<span class="line" id="L148">}</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"><span class="tok-kw">fn</span> <span class="tok-fn">renderToPixelsRgb</span>(self: *<span class="tok-kw">const</span> Self, mcu_storage: *[MAX_COMPONENTS][MAX_BLOCKS]MCU, mcu_id: <span class="tok-type">usize</span>, pixels: []color.Rgb24) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L151"> <span class="tok-kw">const</span> max_horizontal_sampling_factor = self.frame_header.getMaxHorizontalSamplingFactor();</span>
<span class="line" id="L152"> <span class="tok-kw">const</span> max_vertical_sampling_factor = self.frame_header.getMaxVerticalSamplingFactor();</span>
<span class="line" id="L153"> <span class="tok-kw">const</span> mcu_width = <span class="tok-number">8</span> * max_horizontal_sampling_factor;</span>
<span class="line" id="L154"> <span class="tok-kw">const</span> mcu_height = <span class="tok-number">8</span> * max_vertical_sampling_factor;</span>
<span class="line" id="L155"> <span class="tok-kw">const</span> width = self.frame_header.samples_per_row;</span>
<span class="line" id="L156"> <span class="tok-kw">const</span> height = pixels.len / width;</span>
<span class="line" id="L157"> <span class="tok-kw">const</span> mcus_per_row = (width + mcu_width - <span class="tok-number">1</span>) / mcu_width;</span>
<span class="line" id="L158"></span>
<span class="line" id="L159"> <span class="tok-kw">const</span> mcu_origin_x = (mcu_id % mcus_per_row) * mcu_width;</span>
<span class="line" id="L160"> <span class="tok-kw">const</span> mcu_origin_y = (mcu_id / mcus_per_row) * mcu_height;</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..mcu_height) |mcu_y| {</span>
<span class="line" id="L163"> <span class="tok-kw">const</span> y = mcu_origin_y + mcu_y;</span>
<span class="line" id="L164"> <span class="tok-kw">if</span> (y &gt;= height) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L165"></span>
<span class="line" id="L166"> <span class="tok-comment">// y coordinates of each component applied to the sampling factor</span>
</span>
<span class="line" id="L167"> <span class="tok-kw">const</span> y_sampled_y = (mcu_y * self.frame_header.components[<span class="tok-number">0</span>].vertical_sampling_factor) / max_vertical_sampling_factor;</span>
<span class="line" id="L168"> <span class="tok-kw">const</span> cb_sampled_y = (mcu_y * self.frame_header.components[<span class="tok-number">1</span>].vertical_sampling_factor) / max_vertical_sampling_factor;</span>
<span class="line" id="L169"> <span class="tok-kw">const</span> cr_sampled_y = (mcu_y * self.frame_header.components[<span class="tok-number">2</span>].vertical_sampling_factor) / max_vertical_sampling_factor;</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> <span class="tok-comment">// y coordinates of each component in the block</span>
</span>
<span class="line" id="L172"> <span class="tok-kw">const</span> y_block_y = y_sampled_y % <span class="tok-number">8</span>;</span>
<span class="line" id="L173"> <span class="tok-kw">const</span> cb_block_y = cb_sampled_y % <span class="tok-number">8</span>;</span>
<span class="line" id="L174"> <span class="tok-kw">const</span> cr_block_y = cr_sampled_y % <span class="tok-number">8</span>;</span>
<span class="line" id="L175"></span>
<span class="line" id="L176"> <span class="tok-kw">const</span> stride = y * width;</span>
<span class="line" id="L177"></span>
<span class="line" id="L178"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..mcu_width) |mcu_x| {</span>
<span class="line" id="L179"> <span class="tok-kw">const</span> x = mcu_origin_x + mcu_x;</span>
<span class="line" id="L180"> <span class="tok-kw">if</span> (x &gt;= width) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L181"></span>
<span class="line" id="L182"> <span class="tok-comment">// x coordinates of each component applied to the sampling factor</span>
</span>
<span class="line" id="L183"> <span class="tok-kw">const</span> y_sampled_x = (mcu_x * self.frame_header.components[<span class="tok-number">0</span>].horizontal_sampling_factor) / max_horizontal_sampling_factor;</span>
<span class="line" id="L184"> <span class="tok-kw">const</span> cb_sampled_x = (mcu_x * self.frame_header.components[<span class="tok-number">1</span>].horizontal_sampling_factor) / max_horizontal_sampling_factor;</span>
<span class="line" id="L185"> <span class="tok-kw">const</span> cr_sampled_x = (mcu_x * self.frame_header.components[<span class="tok-number">2</span>].horizontal_sampling_factor) / max_horizontal_sampling_factor;</span>
<span class="line" id="L186"></span>
<span class="line" id="L187"> <span class="tok-comment">// x coordinates of each component in the block</span>
</span>
<span class="line" id="L188"> <span class="tok-kw">const</span> y_block_x = y_sampled_x % <span class="tok-number">8</span>;</span>
<span class="line" id="L189"> <span class="tok-kw">const</span> cb_block_x = cb_sampled_x % <span class="tok-number">8</span>;</span>
<span class="line" id="L190"> <span class="tok-kw">const</span> cr_block_x = cr_sampled_x % <span class="tok-number">8</span>;</span>
<span class="line" id="L191"></span>
<span class="line" id="L192"> <span class="tok-kw">const</span> y_block_ind = (y_sampled_y / <span class="tok-number">8</span>) * self.frame_header.components[<span class="tok-number">0</span>].horizontal_sampling_factor + (y_sampled_x / <span class="tok-number">8</span>);</span>
<span class="line" id="L193"> <span class="tok-kw">const</span> cb_block_ind = (cb_sampled_y / <span class="tok-number">8</span>) * self.frame_header.components[<span class="tok-number">1</span>].horizontal_sampling_factor + (cb_sampled_x / <span class="tok-number">8</span>);</span>
<span class="line" id="L194"> <span class="tok-kw">const</span> cr_block_ind = (cr_sampled_y / <span class="tok-number">8</span>) * self.frame_header.components[<span class="tok-number">2</span>].horizontal_sampling_factor + (cr_sampled_x / <span class="tok-number">8</span>);</span>
<span class="line" id="L195"></span>
<span class="line" id="L196"> <span class="tok-kw">const</span> mcu_Y = &amp;mcu_storage[<span class="tok-number">0</span>][y_block_ind];</span>
<span class="line" id="L197"> <span class="tok-kw">const</span> mcu_Cb = &amp;mcu_storage[<span class="tok-number">1</span>][cb_block_ind];</span>
<span class="line" id="L198"> <span class="tok-kw">const</span> mcu_Cr = &amp;mcu_storage[<span class="tok-number">2</span>][cr_block_ind];</span>
<span class="line" id="L199"></span>
<span class="line" id="L200"> <span class="tok-kw">const</span> reconstructed_Y = idct(mcu_Y, <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(y_block_x)), <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(y_block_y)), mcu_id, <span class="tok-number">0</span>);</span>
<span class="line" id="L201"> <span class="tok-kw">const</span> reconstructed_Cb = idct(mcu_Cb, <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(cb_block_x)), <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(cb_block_y)), mcu_id, <span class="tok-number">1</span>);</span>
<span class="line" id="L202"> <span class="tok-kw">const</span> reconstructed_Cr = idct(mcu_Cr, <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(cr_block_x)), <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(cr_block_y)), mcu_id, <span class="tok-number">2</span>);</span>
<span class="line" id="L203"></span>
<span class="line" id="L204"> <span class="tok-kw">const</span> Y: <span class="tok-type">f32</span> = <span class="tok-builtin">@floatFromInt</span>(reconstructed_Y);</span>
<span class="line" id="L205"> <span class="tok-kw">const</span> Cb: <span class="tok-type">f32</span> = <span class="tok-builtin">@floatFromInt</span>(reconstructed_Cb);</span>
<span class="line" id="L206"> <span class="tok-kw">const</span> Cr: <span class="tok-type">f32</span> = <span class="tok-builtin">@floatFromInt</span>(reconstructed_Cr);</span>
<span class="line" id="L207"></span>
<span class="line" id="L208"> <span class="tok-kw">const</span> Co_red = <span class="tok-number">0.299</span>;</span>
<span class="line" id="L209"> <span class="tok-kw">const</span> Co_green = <span class="tok-number">0.587</span>;</span>
<span class="line" id="L210"> <span class="tok-kw">const</span> Co_blue = <span class="tok-number">0.114</span>;</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> <span class="tok-kw">const</span> r = Cr * (<span class="tok-number">2</span> - <span class="tok-number">2</span> * Co_red) + Y;</span>
<span class="line" id="L213"> <span class="tok-kw">const</span> b = Cb * (<span class="tok-number">2</span> - <span class="tok-number">2</span> * Co_blue) + Y;</span>
<span class="line" id="L214"> <span class="tok-kw">const</span> g = (Y - Co_blue * b - Co_red * r) / Co_green;</span>
<span class="line" id="L215"></span>
<span class="line" id="L216"> pixels[stride + x] = .{</span>
<span class="line" id="L217"> .r = <span class="tok-builtin">@intFromFloat</span>(std.math.clamp(r + <span class="tok-number">128.0</span>, <span class="tok-number">0.0</span>, <span class="tok-number">255.0</span>)),</span>
<span class="line" id="L218"> .g = <span class="tok-builtin">@intFromFloat</span>(std.math.clamp(g + <span class="tok-number">128.0</span>, <span class="tok-number">0.0</span>, <span class="tok-number">255.0</span>)),</span>
<span class="line" id="L219"> .b = <span class="tok-builtin">@intFromFloat</span>(std.math.clamp(b + <span class="tok-number">128.0</span>, <span class="tok-number">0.0</span>, <span class="tok-number">255.0</span>)),</span>
<span class="line" id="L220"> };</span>
<span class="line" id="L221"> }</span>
<span class="line" id="L222"> }</span>
<span class="line" id="L223">}</span>
<span class="line" id="L224"></span>
<span class="line" id="L225"><span class="tok-kw">fn</span> <span class="tok-fn">idct</span>(mcu: *<span class="tok-kw">const</span> MCU, x: <span class="tok-type">u3</span>, y: <span class="tok-type">u3</span>, mcu_id: <span class="tok-type">usize</span>, component_id: <span class="tok-type">usize</span>) <span class="tok-type">i8</span> {</span>
<span class="line" id="L226"> <span class="tok-comment">// TODO(angelo): if Ns &gt; 1 it is not interleaved, so the order this should be fixed...</span>
</span>
<span class="line" id="L227"> <span class="tok-comment">// FIXME is wrong for Ns &gt; 1</span>
</span>
<span class="line" id="L228"> <span class="tok-kw">var</span> reconstructed_pixel: <span class="tok-type">f32</span> = <span class="tok-number">0.0</span>;</span>
<span class="line" id="L229"></span>
<span class="line" id="L230"> <span class="tok-kw">var</span> u: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L231"> <span class="tok-kw">while</span> (u &lt; <span class="tok-number">8</span>) : (u += <span class="tok-number">1</span>) {</span>
<span class="line" id="L232"> <span class="tok-kw">var</span> v: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L233"> <span class="tok-kw">while</span> (v &lt; <span class="tok-number">8</span>) : (v += <span class="tok-number">1</span>) {</span>
<span class="line" id="L234"> <span class="tok-kw">const</span> mcu_value = mcu[v * <span class="tok-number">8</span> + u];</span>
<span class="line" id="L235"> reconstructed_pixel += IDCTMultipliers[y][x][u][v] * <span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(mcu_value));</span>
<span class="line" id="L236"> }</span>
<span class="line" id="L237"> }</span>
<span class="line" id="L238"></span>
<span class="line" id="L239"> <span class="tok-kw">const</span> scaled_pixel = <span class="tok-builtin">@round</span>(reconstructed_pixel / <span class="tok-number">4.0</span>);</span>
<span class="line" id="L240"> <span class="tok-kw">if</span> (JPEG_DEBUG) {</span>
<span class="line" id="L241"> <span class="tok-kw">if</span> (scaled_pixel &lt; -<span class="tok-number">128.0</span> <span class="tok-kw">or</span> scaled_pixel &gt; <span class="tok-number">127.0</span>) {</span>
<span class="line" id="L242"> std.debug.print(<span class="tok-str">&quot;Pixel at mcu={} x={} y={} component_id={} is out of bounds with DCT: {d}!\n&quot;</span>, .{ mcu_id, x, y, component_id, scaled_pixel });</span>
<span class="line" id="L243"> }</span>
<span class="line" id="L244"> }</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"> <span class="tok-kw">return</span> <span class="tok-builtin">@intFromFloat</span>(std.math.clamp(scaled_pixel, -<span class="tok-number">128.0</span>, <span class="tok-number">127.0</span>));</span>
<span class="line" id="L247">}</span>
<span class="line" id="L248"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! this module implements the frame header followint the t-81 specs,</span></span>
<span class="line" id="L2"><span class="tok-comment">//! section b.2.2 Frame Header Syntax</span></span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L9"></span>
<span class="line" id="L10"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-kw">const</span> JPEG_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> Component = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L15"> id: <span class="tok-type">u8</span>,</span>
<span class="line" id="L16"> horizontal_sampling_factor: <span class="tok-type">u4</span>,</span>
<span class="line" id="L17"> vertical_sampling_factor: <span class="tok-type">u4</span>,</span>
<span class="line" id="L18"> quantization_table_id: <span class="tok-type">u8</span>,</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Component {</span>
<span class="line" id="L21"> <span class="tok-kw">const</span> component_id = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L22"> <span class="tok-kw">const</span> sampling_factors = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L23"> <span class="tok-kw">const</span> quantization_table_id = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"> <span class="tok-kw">const</span> horizontal_sampling_factor: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(sampling_factors &gt;&gt; <span class="tok-number">4</span>);</span>
<span class="line" id="L26"> <span class="tok-kw">const</span> vertical_sampling_factor: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(sampling_factors &amp; <span class="tok-number">0xF</span>);</span>
<span class="line" id="L27"></span>
<span class="line" id="L28"> <span class="tok-kw">if</span> (horizontal_sampling_factor &lt; <span class="tok-number">1</span> <span class="tok-kw">or</span> horizontal_sampling_factor &gt; <span class="tok-number">4</span>) {</span>
<span class="line" id="L29"> <span class="tok-comment">// TODO(angelo): error, create cusotm error</span>
</span>
<span class="line" id="L30"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L31"> }</span>
<span class="line" id="L32"></span>
<span class="line" id="L33"> <span class="tok-kw">if</span> (vertical_sampling_factor &lt; <span class="tok-number">1</span> <span class="tok-kw">or</span> vertical_sampling_factor &gt; <span class="tok-number">4</span>) {</span>
<span class="line" id="L34"> <span class="tok-comment">// TODO(angelo): error, create custom error</span>
</span>
<span class="line" id="L35"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L36"> }</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"> <span class="tok-kw">if</span> (quantization_table_id &gt; <span class="tok-number">3</span>) {</span>
<span class="line" id="L39"> <span class="tok-comment">// TODO(angelo): error, create custom error</span>
</span>
<span class="line" id="L40"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L41"> }</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"> <span class="tok-kw">return</span> Component{</span>
<span class="line" id="L44"> .id = component_id,</span>
<span class="line" id="L45"> .horizontal_sampling_factor = horizontal_sampling_factor,</span>
<span class="line" id="L46"> .vertical_sampling_factor = vertical_sampling_factor,</span>
<span class="line" id="L47"> .quantization_table_id = quantization_table_id,</span>
<span class="line" id="L48"> };</span>
<span class="line" id="L49"> }</span>
<span class="line" id="L50">};</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"><span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L53"></span>
<span class="line" id="L54">allocator: Allocator,</span>
<span class="line" id="L55">sample_precision: <span class="tok-type">u8</span>,</span>
<span class="line" id="L56">row_count: <span class="tok-type">u16</span>,</span>
<span class="line" id="L57">samples_per_row: <span class="tok-type">u16</span>,</span>
<span class="line" id="L58">components: []Component,</span>
<span class="line" id="L59"></span>
<span class="line" id="L60"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(allocator: Allocator, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Self {</span>
<span class="line" id="L61"> <span class="tok-kw">const</span> segment_size = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L62"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;StartOfFrame: frame size = 0x{X}\n&quot;</span>, .{segment_size});</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> <span class="tok-kw">const</span> sample_precision = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L65"> <span class="tok-kw">const</span> row_count = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L66"> <span class="tok-kw">const</span> samples_per_row = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> <span class="tok-kw">const</span> component_count = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">if</span> (component_count != <span class="tok-number">1</span> <span class="tok-kw">and</span> component_count != <span class="tok-number">3</span>) {</span>
<span class="line" id="L71"> <span class="tok-comment">// TODO(angelo): use jpeg error here, for components</span>
</span>
<span class="line" id="L72"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot; {}x{}, precision={}, {} components\n&quot;</span>, .{ samples_per_row, row_count, sample_precision, component_count });</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-kw">var</span> components = <span class="tok-kw">try</span> allocator.alloc(Component, component_count);</span>
<span class="line" id="L78"> <span class="tok-kw">errdefer</span> allocator.free(components);</span>
<span class="line" id="L79"></span>
<span class="line" id="L80"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L81"> <span class="tok-kw">while</span> (i &lt; component_count) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L82"> components[i] = <span class="tok-kw">try</span> Component.read(reader);</span>
<span class="line" id="L83"> <span class="tok-comment">// TODO(angelo): remove this</span>
</span>
<span class="line" id="L84"> <span class="tok-comment">// if (JPEG_VERY_DEBUG) {</span>
</span>
<span class="line" id="L85"> <span class="tok-comment">// std.debug.print(&quot; ID={}, Vfactor={}, Hfactor={} QtableID={}\n&quot;, .{</span>
</span>
<span class="line" id="L86"> <span class="tok-comment">// components[i].id, components[i].vertical_sampling_factor, components[i].horizontal_sampling_factor, components[i].quantization_table_id,</span>
</span>
<span class="line" id="L87"> <span class="tok-comment">// });</span>
</span>
<span class="line" id="L88"> <span class="tok-comment">// }</span>
</span>
<span class="line" id="L89"> }</span>
<span class="line" id="L90"></span>
<span class="line" id="L91"> <span class="tok-comment">// see B 8.2 table for the meaning of this check.</span>
</span>
<span class="line" id="L92"> std.debug.assert(segment_size == <span class="tok-number">8</span> + <span class="tok-number">3</span> * component_count);</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"> <span class="tok-kw">return</span> Self{</span>
<span class="line" id="L95"> .allocator = allocator,</span>
<span class="line" id="L96"> .sample_precision = sample_precision,</span>
<span class="line" id="L97"> .row_count = row_count,</span>
<span class="line" id="L98"> .samples_per_row = samples_per_row,</span>
<span class="line" id="L99"> .components = components,</span>
<span class="line" id="L100"> };</span>
<span class="line" id="L101">}</span>
<span class="line" id="L102"></span>
<span class="line" id="L103"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L104"> self.allocator.free(self.components);</span>
<span class="line" id="L105">}</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getMaxHorizontalSamplingFactor</span>(self: Self) <span class="tok-type">usize</span> {</span>
<span class="line" id="L108"> <span class="tok-kw">var</span> ret: <span class="tok-type">u4</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L109"> <span class="tok-kw">for</span> (self.components) |component| {</span>
<span class="line" id="L110"> <span class="tok-kw">if</span> (ret &lt; component.horizontal_sampling_factor) {</span>
<span class="line" id="L111"> ret = component.horizontal_sampling_factor;</span>
<span class="line" id="L112"> }</span>
<span class="line" id="L113"> }</span>
<span class="line" id="L114"></span>
<span class="line" id="L115"> <span class="tok-kw">return</span> ret;</span>
<span class="line" id="L116">}</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getMaxVerticalSamplingFactor</span>(self: Self) <span class="tok-type">usize</span> {</span>
<span class="line" id="L119"> <span class="tok-kw">var</span> ret: <span class="tok-type">u4</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L120"> <span class="tok-kw">for</span> (self.components) |component| {</span>
<span class="line" id="L121"> <span class="tok-kw">if</span> (ret &lt; component.vertical_sampling_factor) {</span>
<span class="line" id="L122"> ret = component.vertical_sampling_factor;</span>
<span class="line" id="L123"> }</span>
<span class="line" id="L124"> }</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"> <span class="tok-kw">return</span> ret;</span>
<span class="line" id="L127">}</span>
<span class="line" id="L128"></span>
<span class="line" id="L129"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getBlockCount</span>(self: Self, component_id: <span class="tok-type">usize</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L130"> <span class="tok-comment">// MCU of non-interleaved is just one block.</span>
</span>
<span class="line" id="L131"> <span class="tok-kw">if</span> (self.components.len == <span class="tok-number">1</span>) {</span>
<span class="line" id="L132"> <span class="tok-kw">return</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L133"> }</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"> <span class="tok-kw">const</span> horizontal_block_count = self.components[component_id].horizontal_sampling_factor;</span>
<span class="line" id="L136"> <span class="tok-kw">const</span> vertical_block_count = self.components[component_id].vertical_sampling_factor;</span>
<span class="line" id="L137"> <span class="tok-kw">return</span> horizontal_block_count * vertical_block_count;</span>
<span class="line" id="L138">}</span>
<span class="line" id="L139"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! this module implements the JFIF header</span></span>
<span class="line" id="L2"><span class="tok-comment">//! specified in https://www.w3.org/Graphics/JPEG/itu-t81.pdf</span></span>
<span class="line" id="L3"><span class="tok-comment">//! section B.2.1 and assumes that there will be an application0 segment.</span></span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> Markers = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./utils.zig&quot;</span>).Markers;</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-comment">/// see https://www.ecma-international.org/wp-content/uploads/ECMA_TR-98_1st_edition_june_2009.pdf</span></span>
<span class="line" id="L14"><span class="tok-comment">/// chapt 10.</span></span>
<span class="line" id="L15"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> DensityUnit = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L16"> pixels = <span class="tok-number">0</span>,</span>
<span class="line" id="L17"> dots_per_inch = <span class="tok-number">1</span>,</span>
<span class="line" id="L18"> dots_per_cm = <span class="tok-number">2</span>,</span>
<span class="line" id="L19">};</span>
<span class="line" id="L20"></span>
<span class="line" id="L21">jfif_revision: <span class="tok-type">u16</span>,</span>
<span class="line" id="L22">density_unit: DensityUnit,</span>
<span class="line" id="L23">x_density: <span class="tok-type">u16</span>,</span>
<span class="line" id="L24">y_density: <span class="tok-type">u16</span>,</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(buffered_stream: *buffered_stream_source.DefaultBufferedStreamSourceReader) !Self {</span>
<span class="line" id="L27"> <span class="tok-comment">// Read the first APP0 header.</span>
</span>
<span class="line" id="L28"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L29"> <span class="tok-kw">try</span> buffered_stream.seekTo(<span class="tok-number">2</span>);</span>
<span class="line" id="L30"> <span class="tok-kw">const</span> maybe_app0_marker = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L31"> <span class="tok-kw">if</span> (maybe_app0_marker != <span class="tok-builtin">@intFromEnum</span>(Markers.application0)) {</span>
<span class="line" id="L32"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.App0MarkerDoesNotExist;</span>
<span class="line" id="L33"> }</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"> <span class="tok-comment">// Header length</span>
</span>
<span class="line" id="L36"> _ = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"> <span class="tok-kw">var</span> identifier_buffer: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L39"> _ = <span class="tok-kw">try</span> reader.read(identifier_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"> <span class="tok-kw">if</span> (!std.mem.eql(<span class="tok-type">u8</span>, identifier_buffer[<span class="tok-number">0</span>..], <span class="tok-str">&quot;JFIF&quot;</span>)) {</span>
<span class="line" id="L42"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.JfifIdentifierNotSet;</span>
<span class="line" id="L43"> }</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"> <span class="tok-comment">// NUL byte after JFIF</span>
</span>
<span class="line" id="L46"> _ = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L47"></span>
<span class="line" id="L48"> <span class="tok-kw">const</span> jfif_revision = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L49"> <span class="tok-kw">const</span> density_unit: DensityUnit = <span class="tok-builtin">@enumFromInt</span>(<span class="tok-kw">try</span> reader.readByte());</span>
<span class="line" id="L50"> <span class="tok-kw">const</span> x_density = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L51"> <span class="tok-kw">const</span> y_density = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"> <span class="tok-kw">const</span> thumbnailWidth = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L54"> <span class="tok-kw">const</span> thumbnailHeight = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"> <span class="tok-kw">if</span> (thumbnailWidth != <span class="tok-number">0</span> <span class="tok-kw">or</span> thumbnailHeight != <span class="tok-number">0</span>) {</span>
<span class="line" id="L57"> <span class="tok-comment">// TODO: Support thumbnails (not important)</span>
</span>
<span class="line" id="L58"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.ThumbnailImagesUnsupported;</span>
<span class="line" id="L59"> }</span>
<span class="line" id="L60"></span>
<span class="line" id="L61"> <span class="tok-comment">// Make sure there are no application markers after us.</span>
</span>
<span class="line" id="L62"> <span class="tok-comment">// TODO: Support application markers, present in versions 1.02 and above.</span>
</span>
<span class="line" id="L63"> <span class="tok-comment">// see https://www.ecma-international.org/wp-content/uploads/ECMA_TR-98_1st_edition_june_2009.pdf</span>
</span>
<span class="line" id="L64"> <span class="tok-comment">// chapt 10.1</span>
</span>
<span class="line" id="L65"> <span class="tok-kw">if</span> (((<span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big)) &amp; <span class="tok-number">0xFFF0</span>) == <span class="tok-builtin">@intFromEnum</span>(Markers.application0)) {</span>
<span class="line" id="L66"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.ExtraneousApplicationMarker;</span>
<span class="line" id="L67"> }</span>
<span class="line" id="L68"></span>
<span class="line" id="L69"> <span class="tok-kw">try</span> buffered_stream.seekBy(-<span class="tok-number">2</span>);</span>
<span class="line" id="L70"></span>
<span class="line" id="L71"> <span class="tok-kw">return</span> Self{</span>
<span class="line" id="L72"> .jfif_revision = jfif_revision,</span>
<span class="line" id="L73"> .density_unit = density_unit,</span>
<span class="line" id="L74"> .x_density = x_density,</span>
<span class="line" id="L75"> .y_density = y_density,</span>
<span class="line" id="L76"> };</span>
<span class="line" id="L77">}</span>
<span class="line" id="L78"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../color.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">const</span> FrameHeader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;FrameHeader.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> Frame = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;Frame.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> HuffmanReader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;huffman.zig&quot;</span>).Reader;</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-kw">const</span> MAX_COMPONENTS = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).MAX_COMPONENTS;</span>
<span class="line" id="L13"><span class="tok-kw">const</span> MAX_BLOCKS = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).MAX_BLOCKS;</span>
<span class="line" id="L14"><span class="tok-kw">const</span> MCU = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).MCU;</span>
<span class="line" id="L15"><span class="tok-kw">const</span> ZigzagOffsets = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;utils.zig&quot;</span>).ZigzagOffsets;</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"><span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-kw">const</span> JPEG_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L20"><span class="tok-kw">const</span> JPEG_VERY_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L21"></span>
<span class="line" id="L22">frame: *<span class="tok-kw">const</span> Frame,</span>
<span class="line" id="L23">reader: HuffmanReader,</span>
<span class="line" id="L24">scan_header: ScanHeader,</span>
<span class="line" id="L25">mcu_storage: [MAX_COMPONENTS][MAX_BLOCKS]MCU,</span>
<span class="line" id="L26">prediction_values: [<span class="tok-number">3</span>]<span class="tok-type">i12</span>,</span>
<span class="line" id="L27"></span>
<span class="line" id="L28"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(frame: *<span class="tok-kw">const</span> Frame, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Self {</span>
<span class="line" id="L29"> <span class="tok-kw">const</span> scan_header = <span class="tok-kw">try</span> ScanHeader.read(reader);</span>
<span class="line" id="L30"> <span class="tok-kw">return</span> Self{</span>
<span class="line" id="L31"> .frame = frame,</span>
<span class="line" id="L32"> .reader = HuffmanReader.init(reader),</span>
<span class="line" id="L33"> .scan_header = scan_header,</span>
<span class="line" id="L34"> .mcu_storage = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L35"> .prediction_values = [<span class="tok-number">3</span>]<span class="tok-type">i12</span>{ <span class="tok-number">0</span>, <span class="tok-number">0</span>, <span class="tok-number">0</span> },</span>
<span class="line" id="L36"> };</span>
<span class="line" id="L37">}</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"><span class="tok-comment">/// Perform the scan operation.</span></span>
<span class="line" id="L40"><span class="tok-comment">/// We assume the AC and DC huffman tables are already set up, and ready to decode.</span></span>
<span class="line" id="L41"><span class="tok-comment">/// This should implement section E.2.3 of t-81 1992.</span></span>
<span class="line" id="L42"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">performScan</span>(frame: *<span class="tok-kw">const</span> Frame, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader, pixels_opt: *?color.PixelStorage) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L43"> <span class="tok-kw">var</span> self = <span class="tok-kw">try</span> Self.init(frame, reader);</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"> <span class="tok-kw">const</span> mcu_count = Self.calculateMCUCountInFrame(&amp;frame.frame_header);</span>
<span class="line" id="L46"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..mcu_count) |mcu_id| {</span>
<span class="line" id="L47"> <span class="tok-kw">try</span> self.decodeMCU();</span>
<span class="line" id="L48"> <span class="tok-kw">try</span> self.dequantize();</span>
<span class="line" id="L49"> <span class="tok-kw">try</span> frame.renderToPixels(&amp;self.mcu_storage, mcu_id, &amp;pixels_opt.*.?);</span>
<span class="line" id="L50"> }</span>
<span class="line" id="L51">}</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"><span class="tok-kw">fn</span> <span class="tok-fn">dequantize</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L54"> <span class="tok-kw">for</span> (self.frame.frame_header.components, <span class="tok-number">0</span>..) |component, component_id| {</span>
<span class="line" id="L55"> <span class="tok-kw">const</span> block_count = self.frame.frame_header.getBlockCount(component_id);</span>
<span class="line" id="L56"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..block_count) |i| {</span>
<span class="line" id="L57"> <span class="tok-kw">const</span> block = &amp;self.mcu_storage[component_id][i];</span>
<span class="line" id="L58"></span>
<span class="line" id="L59"> <span class="tok-kw">if</span> (self.frame.quantization_tables[component.quantization_table_id]) |quantization_table| {</span>
<span class="line" id="L60"> <span class="tok-kw">var</span> sample_id: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L61"> <span class="tok-kw">while</span> (sample_id &lt; <span class="tok-number">64</span>) : (sample_id += <span class="tok-number">1</span>) {</span>
<span class="line" id="L62"> block[sample_id] = block[sample_id] * quantization_table.q8[sample_id];</span>
<span class="line" id="L63"> }</span>
<span class="line" id="L64"> } <span class="tok-kw">else</span> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L65"> }</span>
<span class="line" id="L66"> }</span>
<span class="line" id="L67">}</span>
<span class="line" id="L68"></span>
<span class="line" id="L69"><span class="tok-kw">fn</span> <span class="tok-fn">calculateMCUCountInFrame</span>(frame_header: *<span class="tok-kw">const</span> FrameHeader) <span class="tok-type">usize</span> {</span>
<span class="line" id="L70"> <span class="tok-comment">// FIXME: This is very naive and probably only works for Baseline DCT.</span>
</span>
<span class="line" id="L71"> <span class="tok-comment">// MCU of non-interleaved is just one block.</span>
</span>
<span class="line" id="L72"> <span class="tok-kw">const</span> horizontal_block_count = <span class="tok-kw">if</span> (<span class="tok-number">1</span> &lt; frame_header.components.len) frame_header.getMaxHorizontalSamplingFactor() <span class="tok-kw">else</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L73"> <span class="tok-kw">const</span> vertical_block_count = <span class="tok-kw">if</span> (<span class="tok-number">1</span> &lt; frame_header.components.len) frame_header.getMaxVerticalSamplingFactor() <span class="tok-kw">else</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L74"> <span class="tok-kw">const</span> mcu_width = <span class="tok-number">8</span> * horizontal_block_count;</span>
<span class="line" id="L75"> <span class="tok-kw">const</span> mcu_height = <span class="tok-number">8</span> * vertical_block_count;</span>
<span class="line" id="L76"> <span class="tok-kw">const</span> mcu_count_per_row = (frame_header.samples_per_row + mcu_width - <span class="tok-number">1</span>) / mcu_width;</span>
<span class="line" id="L77"> <span class="tok-kw">const</span> mcu_count_per_column = (frame_header.row_count + mcu_height - <span class="tok-number">1</span>) / mcu_height;</span>
<span class="line" id="L78"> <span class="tok-kw">return</span> mcu_count_per_row * mcu_count_per_column;</span>
<span class="line" id="L79">}</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"><span class="tok-kw">fn</span> <span class="tok-fn">decodeMCU</span>(self: *Self) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L82"> <span class="tok-kw">for</span> (self.scan_header.components, <span class="tok-number">0</span>..) |maybe_component, component_id| {</span>
<span class="line" id="L83"> _ = component_id;</span>
<span class="line" id="L84"> <span class="tok-kw">if</span> (maybe_component == <span class="tok-null">null</span>)</span>
<span class="line" id="L85"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> <span class="tok-kw">try</span> self.decodeMCUComponent(maybe_component.?);</span>
<span class="line" id="L88"> }</span>
<span class="line" id="L89">}</span>
<span class="line" id="L90"></span>
<span class="line" id="L91"><span class="tok-kw">fn</span> <span class="tok-fn">decodeMCUComponent</span>(self: *Self, component: ScanComponentSpec) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L92"> <span class="tok-comment">// The encoder might reorder components or omit one if it decides that the</span>
</span>
<span class="line" id="L93"> <span class="tok-comment">// file size can be reduced that way. Therefore we need to select the correct</span>
</span>
<span class="line" id="L94"> <span class="tok-comment">// destination for this component.</span>
</span>
<span class="line" id="L95"> <span class="tok-kw">const</span> component_destination: <span class="tok-type">usize</span> = blk: {</span>
<span class="line" id="L96"> <span class="tok-kw">for</span> (self.frame.frame_header.components, <span class="tok-number">0</span>..) |frame_component, i| {</span>
<span class="line" id="L97"> <span class="tok-kw">if</span> (frame_component.id == component.component_selector) {</span>
<span class="line" id="L98"> <span class="tok-kw">break</span> :blk i;</span>
<span class="line" id="L99"> }</span>
<span class="line" id="L100"> }</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L103"> };</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> <span class="tok-kw">const</span> block_count = self.frame.frame_header.getBlockCount(component_destination);</span>
<span class="line" id="L106"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..block_count) |i| {</span>
<span class="line" id="L107"> <span class="tok-kw">const</span> mcu = &amp;self.mcu_storage[component_destination][i];</span>
<span class="line" id="L108"></span>
<span class="line" id="L109"> <span class="tok-comment">// Decode the DC coefficient</span>
</span>
<span class="line" id="L110"> <span class="tok-kw">if</span> (self.frame.dc_huffman_tables[component.dc_table_selector] == <span class="tok-null">null</span>) <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L111"></span>
<span class="line" id="L112"> self.reader.setHuffmanTable(&amp;self.frame.dc_huffman_tables[component.dc_table_selector].?);</span>
<span class="line" id="L113"></span>
<span class="line" id="L114"> <span class="tok-kw">const</span> dc_coefficient = <span class="tok-kw">try</span> self.decodeDCCoefficient(component_destination);</span>
<span class="line" id="L115"> mcu[<span class="tok-number">0</span>] = dc_coefficient;</span>
<span class="line" id="L116"></span>
<span class="line" id="L117"> <span class="tok-comment">// Decode the AC coefficients</span>
</span>
<span class="line" id="L118"> <span class="tok-kw">if</span> (self.frame.ac_huffman_tables[component.ac_table_selector] == <span class="tok-null">null</span>)</span>
<span class="line" id="L119"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L120"></span>
<span class="line" id="L121"> self.reader.setHuffmanTable(&amp;self.frame.ac_huffman_tables[component.ac_table_selector].?);</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"> <span class="tok-kw">try</span> self.decodeACCoefficients(mcu);</span>
<span class="line" id="L124"> }</span>
<span class="line" id="L125">}</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"><span class="tok-kw">fn</span> <span class="tok-fn">decodeDCCoefficient</span>(self: *Self, component_destination: <span class="tok-type">usize</span>) ImageReadError!<span class="tok-type">i12</span> {</span>
<span class="line" id="L128"> <span class="tok-kw">const</span> maybe_magnitude = <span class="tok-kw">try</span> self.reader.readCode();</span>
<span class="line" id="L129"> <span class="tok-kw">if</span> (maybe_magnitude &gt; <span class="tok-number">11</span>) <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L130"> <span class="tok-kw">const</span> magnitude: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(maybe_magnitude);</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"> <span class="tok-kw">const</span> diff: <span class="tok-type">i12</span> = <span class="tok-builtin">@intCast</span>(<span class="tok-kw">try</span> self.reader.readMagnitudeCoded(magnitude));</span>
<span class="line" id="L133"> <span class="tok-comment">// TODO: check correctess after refactor</span>
</span>
<span class="line" id="L134"> <span class="tok-kw">const</span> dc_coefficient = diff + self.prediction_values[component_destination];</span>
<span class="line" id="L135"> self.prediction_values[component_destination] = dc_coefficient;</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"> <span class="tok-kw">return</span> dc_coefficient;</span>
<span class="line" id="L138">}</span>
<span class="line" id="L139"></span>
<span class="line" id="L140"><span class="tok-kw">fn</span> <span class="tok-fn">decodeACCoefficients</span>(self: *Self, mcu: *MCU) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L141"> <span class="tok-kw">var</span> ac: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L142"> <span class="tok-kw">var</span> did_see_eob = <span class="tok-null">false</span>;</span>
<span class="line" id="L143"> <span class="tok-kw">while</span> (ac &lt; <span class="tok-number">64</span>) : (ac += <span class="tok-number">1</span>) {</span>
<span class="line" id="L144"> <span class="tok-kw">if</span> (did_see_eob) {</span>
<span class="line" id="L145"> mcu[ZigzagOffsets[ac]] = <span class="tok-number">0</span>;</span>
<span class="line" id="L146"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L147"> }</span>
<span class="line" id="L148"></span>
<span class="line" id="L149"> <span class="tok-kw">const</span> zero_run_length_and_magnitude = <span class="tok-kw">try</span> self.reader.readCode();</span>
<span class="line" id="L150"> <span class="tok-comment">// 00 == EOB</span>
</span>
<span class="line" id="L151"> <span class="tok-kw">if</span> (zero_run_length_and_magnitude == <span class="tok-number">0x00</span>) {</span>
<span class="line" id="L152"> did_see_eob = <span class="tok-null">true</span>;</span>
<span class="line" id="L153"> mcu[ZigzagOffsets[ac]] = <span class="tok-number">0</span>;</span>
<span class="line" id="L154"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L155"> }</span>
<span class="line" id="L156"></span>
<span class="line" id="L157"> <span class="tok-kw">const</span> zero_run_length = zero_run_length_and_magnitude &gt;&gt; <span class="tok-number">4</span>;</span>
<span class="line" id="L158"></span>
<span class="line" id="L159"> <span class="tok-kw">const</span> maybe_magnitude = zero_run_length_and_magnitude &amp; <span class="tok-number">0xF</span>;</span>
<span class="line" id="L160"> <span class="tok-kw">if</span> (maybe_magnitude &gt; <span class="tok-number">10</span>) <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L161"> <span class="tok-kw">const</span> magnitude: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(maybe_magnitude);</span>
<span class="line" id="L162"></span>
<span class="line" id="L163"> <span class="tok-kw">const</span> ac_coefficient: <span class="tok-type">i11</span> = <span class="tok-builtin">@intCast</span>(<span class="tok-kw">try</span> self.reader.readMagnitudeCoded(magnitude));</span>
<span class="line" id="L164"></span>
<span class="line" id="L165"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L166"> <span class="tok-kw">while</span> (i &lt; zero_run_length) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L167"> mcu[ZigzagOffsets[ac]] = <span class="tok-number">0</span>;</span>
<span class="line" id="L168"> ac += <span class="tok-number">1</span>;</span>
<span class="line" id="L169"> }</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> mcu[ZigzagOffsets[ac]] = ac_coefficient;</span>
<span class="line" id="L172"> }</span>
<span class="line" id="L173">}</span>
<span class="line" id="L174"></span>
<span class="line" id="L175"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ScanComponentSpec = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L176"> component_selector: <span class="tok-type">u8</span>,</span>
<span class="line" id="L177"> dc_table_selector: <span class="tok-type">u4</span>,</span>
<span class="line" id="L178"> ac_table_selector: <span class="tok-type">u4</span>,</span>
<span class="line" id="L179"></span>
<span class="line" id="L180"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!ScanComponentSpec {</span>
<span class="line" id="L181"> <span class="tok-kw">const</span> component_selector = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L182"> <span class="tok-kw">const</span> entropy_coding_selectors = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L183"></span>
<span class="line" id="L184"> <span class="tok-kw">const</span> dc_table_selector: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(entropy_coding_selectors &gt;&gt; <span class="tok-number">4</span>);</span>
<span class="line" id="L185"> <span class="tok-kw">const</span> ac_table_selector: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(entropy_coding_selectors &amp; <span class="tok-number">0b11</span>);</span>
<span class="line" id="L186"></span>
<span class="line" id="L187"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) {</span>
<span class="line" id="L188"> std.debug.print(<span class="tok-str">&quot; Component spec: selector={}, DC table ID={}, AC table ID={}\n&quot;</span>, .{ component_selector, dc_table_selector, ac_table_selector });</span>
<span class="line" id="L189"> }</span>
<span class="line" id="L190"></span>
<span class="line" id="L191"> <span class="tok-kw">return</span> ScanComponentSpec{</span>
<span class="line" id="L192"> .component_selector = component_selector,</span>
<span class="line" id="L193"> .dc_table_selector = dc_table_selector,</span>
<span class="line" id="L194"> .ac_table_selector = ac_table_selector,</span>
<span class="line" id="L195"> };</span>
<span class="line" id="L196"> }</span>
<span class="line" id="L197">};</span>
<span class="line" id="L198"></span>
<span class="line" id="L199"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Header = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L200"> components: [<span class="tok-number">4</span>]?ScanComponentSpec,</span>
<span class="line" id="L201"></span>
<span class="line" id="L202"> <span class="tok-comment">/// first DCT coefficient in each block in zig-zag order</span></span>
<span class="line" id="L203"> start_of_spectral_selection: <span class="tok-type">u8</span>,</span>
<span class="line" id="L204"></span>
<span class="line" id="L205"> <span class="tok-comment">/// last DCT coefficient in each block in zig-zag order</span></span>
<span class="line" id="L206"> <span class="tok-comment">/// 63 for sequential DCT, 0 for lossless</span></span>
<span class="line" id="L207"> <span class="tok-comment">/// TODO(angelo) add check for this.</span></span>
<span class="line" id="L208"> end_of_spectral_selection: <span class="tok-type">u8</span>,</span>
<span class="line" id="L209"> approximation_high: <span class="tok-type">u4</span>,</span>
<span class="line" id="L210"> approximation_low: <span class="tok-type">u4</span>,</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Header {</span>
<span class="line" id="L213"> <span class="tok-kw">const</span> segment_size = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L214"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;StartOfScan: segment size = 0x{X}\n&quot;</span>, .{segment_size});</span>
<span class="line" id="L215"></span>
<span class="line" id="L216"> <span class="tok-kw">const</span> component_count = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L217"> <span class="tok-kw">if</span> (component_count &lt; <span class="tok-number">1</span> <span class="tok-kw">or</span> component_count &gt; <span class="tok-number">4</span>) {</span>
<span class="line" id="L218"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L219"> }</span>
<span class="line" id="L220"></span>
<span class="line" id="L221"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot; Component count: {}\n&quot;</span>, .{component_count});</span>
<span class="line" id="L222"></span>
<span class="line" id="L223"> <span class="tok-kw">var</span> components = [_]?ScanComponentSpec{<span class="tok-null">null</span>} ** <span class="tok-number">4</span>;</span>
<span class="line" id="L224"></span>
<span class="line" id="L225"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) std.debug.print(<span class="tok-str">&quot; Components:\n&quot;</span>, .{});</span>
<span class="line" id="L226"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L227"> <span class="tok-kw">while</span> (i &lt; component_count) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L228"> components[i] = <span class="tok-kw">try</span> ScanComponentSpec.read(reader);</span>
<span class="line" id="L229"> }</span>
<span class="line" id="L230"></span>
<span class="line" id="L231"> <span class="tok-kw">const</span> start_of_spectral_selection = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L232"> <span class="tok-kw">const</span> end_of_spectral_selection = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L233"></span>
<span class="line" id="L234"> <span class="tok-kw">if</span> (start_of_spectral_selection &gt; <span class="tok-number">63</span>) {</span>
<span class="line" id="L235"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L236"> }</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"> <span class="tok-kw">if</span> (end_of_spectral_selection &lt; start_of_spectral_selection <span class="tok-kw">or</span> end_of_spectral_selection &gt; <span class="tok-number">63</span>) {</span>
<span class="line" id="L239"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L240"> }</span>
<span class="line" id="L241"></span>
<span class="line" id="L242"> <span class="tok-comment">// If Ss = 0, then Se = 63.</span>
</span>
<span class="line" id="L243"> <span class="tok-kw">if</span> (start_of_spectral_selection == <span class="tok-number">0</span> <span class="tok-kw">and</span> end_of_spectral_selection != <span class="tok-number">63</span>) {</span>
<span class="line" id="L244"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L245"> }</span>
<span class="line" id="L246"></span>
<span class="line" id="L247"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) std.debug.print(<span class="tok-str">&quot; Spectral selection: {}-{}\n&quot;</span>, .{ start_of_spectral_selection, end_of_spectral_selection });</span>
<span class="line" id="L248"></span>
<span class="line" id="L249"> <span class="tok-kw">const</span> approximation_bits = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L250"> <span class="tok-kw">const</span> approximation_high: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(approximation_bits &gt;&gt; <span class="tok-number">4</span>);</span>
<span class="line" id="L251"> <span class="tok-kw">const</span> approximation_low: <span class="tok-type">u4</span> = <span class="tok-builtin">@intCast</span>(approximation_bits &amp; <span class="tok-number">0b1111</span>);</span>
<span class="line" id="L252"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) std.debug.print(<span class="tok-str">&quot; Approximation bit position: high={} low={}\n&quot;</span>, .{ approximation_high, approximation_low });</span>
<span class="line" id="L253"></span>
<span class="line" id="L254"> std.debug.assert(segment_size == <span class="tok-number">2</span> * component_count + <span class="tok-number">1</span> + <span class="tok-number">2</span> + <span class="tok-number">1</span> + <span class="tok-number">2</span>);</span>
<span class="line" id="L255"></span>
<span class="line" id="L256"> <span class="tok-kw">return</span> Header{</span>
<span class="line" id="L257"> .components = components,</span>
<span class="line" id="L258"> .start_of_spectral_selection = start_of_spectral_selection,</span>
<span class="line" id="L259"> .end_of_spectral_selection = end_of_spectral_selection,</span>
<span class="line" id="L260"> .approximation_high = approximation_high,</span>
<span class="line" id="L261"> .approximation_low = approximation_low,</span>
<span class="line" id="L262"> };</span>
<span class="line" id="L263"> }</span>
<span class="line" id="L264">};</span>
<span class="line" id="L265"></span>
<span class="line" id="L266"><span class="tok-kw">const</span> ScanHeader = Header;</span>
<span class="line" id="L267"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! This module contains implementation of huffman table encodings</span></span>
<span class="line" id="L2"><span class="tok-comment">//! as specified by section 2.4.2 in t-81 1992</span></span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">const</span> HuffmanCode = <span class="tok-kw">struct</span> { length_minus_one: <span class="tok-type">u4</span>, code: <span class="tok-type">u16</span> };</span>
<span class="line" id="L12"><span class="tok-kw">const</span> HuffmanCodeMap = std.AutoArrayHashMap(HuffmanCode, <span class="tok-type">u8</span>);</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> JPEG_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L15"><span class="tok-kw">const</span> JPEG_VERY_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Table = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L18"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"> allocator: Allocator,</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"> code_counts: [<span class="tok-number">16</span>]<span class="tok-type">u8</span>,</span>
<span class="line" id="L23"> code_map: HuffmanCodeMap,</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"> table_class: <span class="tok-type">u8</span>,</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(allocator: Allocator, table_class: <span class="tok-type">u8</span>, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Self {</span>
<span class="line" id="L28"> <span class="tok-kw">if</span> (table_class &amp; <span class="tok-number">1</span> != table_class)</span>
<span class="line" id="L29"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"> <span class="tok-kw">var</span> code_counts: [<span class="tok-number">16</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L32"> <span class="tok-kw">if</span> ((<span class="tok-kw">try</span> reader.read(code_counts[<span class="tok-number">0</span>..])) &lt; <span class="tok-number">16</span>) {</span>
<span class="line" id="L33"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L34"> }</span>
<span class="line" id="L35"></span>
<span class="line" id="L36"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot; Code counts: {any}\n&quot;</span>, .{code_counts});</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"> <span class="tok-kw">var</span> total_huffman_codes: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L39"> <span class="tok-kw">for</span> (code_counts) |count| total_huffman_codes += count;</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"> <span class="tok-kw">var</span> huffman_code_map = HuffmanCodeMap.init(allocator);</span>
<span class="line" id="L42"> <span class="tok-kw">errdefer</span> huffman_code_map.deinit();</span>
<span class="line" id="L43"></span>
<span class="line" id="L44"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) std.debug.print(<span class="tok-str">&quot; Decoded huffman codes map:\n&quot;</span>, .{});</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> <span class="tok-kw">var</span> code: <span class="tok-type">u16</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L47"> <span class="tok-kw">for</span> (code_counts, <span class="tok-number">0</span>..) |count, i| {</span>
<span class="line" id="L48"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) {</span>
<span class="line" id="L49"> std.debug.print(<span class="tok-str">&quot; Length {}: &quot;</span>, .{i + <span class="tok-number">1</span>});</span>
<span class="line" id="L50"> <span class="tok-kw">if</span> (count == <span class="tok-number">0</span>) {</span>
<span class="line" id="L51"> std.debug.print(<span class="tok-str">&quot;(none)\n&quot;</span>, .{});</span>
<span class="line" id="L52"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L53"> std.debug.print(<span class="tok-str">&quot;\n&quot;</span>, .{});</span>
<span class="line" id="L54"> }</span>
<span class="line" id="L55"> }</span>
<span class="line" id="L56"></span>
<span class="line" id="L57"> <span class="tok-kw">var</span> j: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L58"> <span class="tok-kw">while</span> (j &lt; count) : (j += <span class="tok-number">1</span>) {</span>
<span class="line" id="L59"> <span class="tok-comment">// Check if we hit all 1s, i.e. 111111 for i == 6, which is an invalid value</span>
</span>
<span class="line" id="L60"> <span class="tok-kw">if</span> (code == (<span class="tok-builtin">@as</span>(<span class="tok-type">u17</span>, <span class="tok-builtin">@intCast</span>(<span class="tok-number">1</span>)) &lt;&lt; (<span class="tok-builtin">@as</span>(<span class="tok-type">u5</span>, <span class="tok-builtin">@intCast</span>(i)) + <span class="tok-number">1</span>)) - <span class="tok-number">1</span>) {</span>
<span class="line" id="L61"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L62"> }</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> <span class="tok-kw">const</span> byte = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L65"> <span class="tok-kw">try</span> huffman_code_map.put(.{ .length_minus_one = <span class="tok-builtin">@as</span>(<span class="tok-type">u4</span>, <span class="tok-builtin">@intCast</span>(i)), .code = code }, byte);</span>
<span class="line" id="L66"></span>
<span class="line" id="L67"> <span class="tok-kw">if</span> (JPEG_VERY_DEBUG) std.debug.print(<span class="tok-str">&quot; {b} =&gt; 0x{X}\n&quot;</span>, .{ code, byte });</span>
<span class="line" id="L68"> code += <span class="tok-number">1</span>;</span>
<span class="line" id="L69"> }</span>
<span class="line" id="L70"></span>
<span class="line" id="L71"> code &lt;&lt;= <span class="tok-number">1</span>;</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"> <span class="tok-kw">return</span> Self{</span>
<span class="line" id="L75"> .allocator = allocator,</span>
<span class="line" id="L76"> .code_counts = code_counts,</span>
<span class="line" id="L77"> .code_map = huffman_code_map,</span>
<span class="line" id="L78"> .table_class = table_class,</span>
<span class="line" id="L79"> };</span>
<span class="line" id="L80"> }</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L83"> self.code_map.deinit();</span>
<span class="line" id="L84"> }</span>
<span class="line" id="L85">};</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Reader = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L88"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> table: ?*<span class="tok-kw">const</span> Table = <span class="tok-null">null</span>,</span>
<span class="line" id="L91"> reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader,</span>
<span class="line" id="L92"> byte_buffer: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L93"> bits_left: <span class="tok-type">u4</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L94"> last_byte_was_ff: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L95"></span>
<span class="line" id="L96"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) Self {</span>
<span class="line" id="L97"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L98"> .reader = reader,</span>
<span class="line" id="L99"> };</span>
<span class="line" id="L100"> }</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">setHuffmanTable</span>(self: *Self, table: *<span class="tok-kw">const</span> Table) <span class="tok-type">void</span> {</span>
<span class="line" id="L103"> self.table = table;</span>
<span class="line" id="L104"> }</span>
<span class="line" id="L105"></span>
<span class="line" id="L106"> <span class="tok-kw">fn</span> <span class="tok-fn">readBit</span>(self: *Self) ImageReadError!<span class="tok-type">u1</span> {</span>
<span class="line" id="L107"> <span class="tok-kw">if</span> (self.bits_left == <span class="tok-number">0</span>) {</span>
<span class="line" id="L108"> self.byte_buffer = <span class="tok-kw">try</span> self.reader.readByte();</span>
<span class="line" id="L109"></span>
<span class="line" id="L110"> <span class="tok-kw">if</span> (self.byte_buffer == <span class="tok-number">0</span> <span class="tok-kw">and</span> self.last_byte_was_ff) {</span>
<span class="line" id="L111"> <span class="tok-comment">// This was a stuffed byte, read one more.</span>
</span>
<span class="line" id="L112"> self.byte_buffer = <span class="tok-kw">try</span> self.reader.readByte();</span>
<span class="line" id="L113"> }</span>
<span class="line" id="L114"> self.last_byte_was_ff = self.byte_buffer == <span class="tok-number">0xFF</span>;</span>
<span class="line" id="L115"> self.bits_left = <span class="tok-number">8</span>;</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"> <span class="tok-kw">const</span> bit: <span class="tok-type">u1</span> = <span class="tok-builtin">@intCast</span>(self.byte_buffer &gt;&gt; <span class="tok-number">7</span>);</span>
<span class="line" id="L119"> self.byte_buffer &lt;&lt;= <span class="tok-number">1</span>;</span>
<span class="line" id="L120"> self.bits_left -= <span class="tok-number">1</span>;</span>
<span class="line" id="L121"></span>
<span class="line" id="L122"> <span class="tok-kw">return</span> bit;</span>
<span class="line" id="L123"> }</span>
<span class="line" id="L124"></span>
<span class="line" id="L125"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readCode</span>(self: *Self) ImageReadError!<span class="tok-type">u8</span> {</span>
<span class="line" id="L126"> <span class="tok-kw">var</span> code: <span class="tok-type">u16</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L127"></span>
<span class="line" id="L128"> <span class="tok-kw">var</span> i: <span class="tok-type">u5</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L129"> <span class="tok-kw">while</span> (i &lt; <span class="tok-number">16</span>) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L130"> <span class="tok-comment">// NOTE: if the table is stored as a tree, this is O(1) to update the new node,</span>
</span>
<span class="line" id="L131"> <span class="tok-comment">// instead of O(log n), so should be faster.</span>
</span>
<span class="line" id="L132"> code = (code &lt;&lt; <span class="tok-number">1</span>) | (<span class="tok-kw">try</span> self.readBit());</span>
<span class="line" id="L133"> <span class="tok-kw">if</span> (self.table.?.code_map.get(.{ .length_minus_one = <span class="tok-builtin">@intCast</span>(i), .code = code })) |value| {</span>
<span class="line" id="L134"> <span class="tok-kw">return</span> value;</span>
<span class="line" id="L135"> }</span>
<span class="line" id="L136"> }</span>
<span class="line" id="L137"></span>
<span class="line" id="L138"> <span class="tok-kw">if</span> (JPEG_DEBUG) std.debug.print(<span class="tok-str">&quot;found unknown code: {x}\n&quot;</span>, .{code});</span>
<span class="line" id="L139"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L140"> }</span>
<span class="line" id="L141"></span>
<span class="line" id="L142"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readLiteralBits</span>(self: *Self, bitsNeeded: <span class="tok-type">u8</span>) ImageReadError!<span class="tok-type">u32</span> {</span>
<span class="line" id="L143"> <span class="tok-kw">var</span> bits: <span class="tok-type">u32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L144"></span>
<span class="line" id="L145"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L146"> <span class="tok-kw">while</span> (i &lt; bitsNeeded) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L147"> bits = (bits &lt;&lt; <span class="tok-number">1</span>) | (<span class="tok-kw">try</span> self.readBit());</span>
<span class="line" id="L148"> }</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"> <span class="tok-kw">return</span> bits;</span>
<span class="line" id="L151"> }</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"> <span class="tok-comment">/// This function implements T.81 section F1.2.1, Huffman encoding of DC coefficients.</span></span>
<span class="line" id="L154"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readMagnitudeCoded</span>(self: *Self, magnitude: <span class="tok-type">u5</span>) ImageReadError!<span class="tok-type">i32</span> {</span>
<span class="line" id="L155"> <span class="tok-kw">if</span> (magnitude == <span class="tok-number">0</span>)</span>
<span class="line" id="L156"> <span class="tok-kw">return</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"> <span class="tok-kw">const</span> bits = <span class="tok-kw">try</span> self.readLiteralBits(magnitude);</span>
<span class="line" id="L159"></span>
<span class="line" id="L160"> <span class="tok-comment">// The sign of the read bits value.</span>
</span>
<span class="line" id="L161"> <span class="tok-kw">const</span> bits_sign = (bits &gt;&gt; (magnitude - <span class="tok-number">1</span>)) &amp; <span class="tok-number">1</span>;</span>
<span class="line" id="L162"> <span class="tok-comment">// The mask for clearing the sign bit.</span>
</span>
<span class="line" id="L163"> <span class="tok-kw">const</span> bits_mask = (<span class="tok-builtin">@as</span>(<span class="tok-type">u32</span>, <span class="tok-number">1</span>) &lt;&lt; (magnitude - <span class="tok-number">1</span>)) - <span class="tok-number">1</span>;</span>
<span class="line" id="L164"> <span class="tok-comment">// The bits without the sign bit.</span>
</span>
<span class="line" id="L165"> <span class="tok-kw">const</span> unsigned_bits = bits &amp; bits_mask;</span>
<span class="line" id="L166"></span>
<span class="line" id="L167"> <span class="tok-comment">// The magnitude base value. This is -2^n+1 when bits_sign == 0, and</span>
</span>
<span class="line" id="L168"> <span class="tok-comment">// 2^(n-1) when bits_sign == 1.</span>
</span>
<span class="line" id="L169"> <span class="tok-kw">const</span> base = <span class="tok-kw">if</span> (bits_sign == <span class="tok-number">0</span>)</span>
<span class="line" id="L170"> -(<span class="tok-builtin">@as</span>(<span class="tok-type">i32</span>, <span class="tok-number">1</span>) &lt;&lt; magnitude) + <span class="tok-number">1</span></span>
<span class="line" id="L171"> <span class="tok-kw">else</span></span>
<span class="line" id="L172"> (<span class="tok-builtin">@as</span>(<span class="tok-type">i32</span>, <span class="tok-number">1</span>) &lt;&lt; (magnitude - <span class="tok-number">1</span>));</span>
<span class="line" id="L173"></span>
<span class="line" id="L174"> <span class="tok-kw">return</span> base + <span class="tok-builtin">@as</span>(<span class="tok-type">i32</span>, <span class="tok-builtin">@bitCast</span>(unsigned_bits));</span>
<span class="line" id="L175"> }</span>
<span class="line" id="L176">};</span>
<span class="line" id="L177"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! see section 2.4.1 of the spec t-81 1992</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">const</span> ZigzagOffsets = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;./utils.zig&quot;</span>).ZigzagOffsets;</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">const</span> JPEG_DEBUG = <span class="tok-null">false</span>;</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Header = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L14"> <span class="tok-comment">// TODO(angelo): ! substitute this implementation to `parseDefineQuantizationTables` in jpeg.zig</span>
</span>
<span class="line" id="L15"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"> <span class="tok-comment">//// Specifies the precision of the quantization table entries.</span>
</span>
<span class="line" id="L18"> <span class="tok-comment">/// - 0 = 8 bits</span></span>
<span class="line" id="L19"> <span class="tok-comment">/// - 1 = 16 bits</span></span>
<span class="line" id="L20"> table_precision: <span class="tok-type">u4</span>,</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"> <span class="tok-comment">/// Specifies one of four possible destinations at the decoder into</span></span>
<span class="line" id="L23"> <span class="tok-comment">/// which the quantization table shall be installed.</span></span>
<span class="line" id="L24"> table_destination: <span class="tok-type">u4</span>,</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"> table: Table,</span>
<span class="line" id="L27"></span>
<span class="line" id="L28"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Self {</span>
<span class="line" id="L29"> _ = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big); <span class="tok-comment">// read the size, but we don't need it</span>
</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"> <span class="tok-kw">const</span> precision_and_destination = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L32"> <span class="tok-kw">const</span> table_precision = precision_and_destination &gt;&gt; <span class="tok-number">4</span>;</span>
<span class="line" id="L33"> <span class="tok-kw">const</span> table_destination = precision_and_destination &amp; <span class="tok-number">0b11</span>;</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"> <span class="tok-kw">const</span> table = <span class="tok-kw">try</span> Table.read(table_precision, reader);</span>
<span class="line" id="L36"></span>
<span class="line" id="L37"> <span class="tok-comment">// TODO: add check for: &quot;An 8-bit DCT-based process shall not use a 16-bit precision quantization table.&quot;</span>
</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"> <span class="tok-kw">return</span> Self{</span>
<span class="line" id="L40"> .table_precision = table_precision,</span>
<span class="line" id="L41"> .table_destination = table_destination,</span>
<span class="line" id="L42"> .table = table,</span>
<span class="line" id="L43"> };</span>
<span class="line" id="L44"> }</span>
<span class="line" id="L45">};</span>
<span class="line" id="L46"></span>
<span class="line" id="L47"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Table = <span class="tok-kw">union</span>(<span class="tok-kw">enum</span>) {</span>
<span class="line" id="L48"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L49"> q8: [<span class="tok-number">64</span>]<span class="tok-type">u8</span>,</span>
<span class="line" id="L50"> q16: [<span class="tok-number">64</span>]<span class="tok-type">u16</span>,</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(precision: <span class="tok-type">u8</span>, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Self {</span>
<span class="line" id="L53"> <span class="tok-comment">// 0 = 8 bits, 1 = 16 bits</span>
</span>
<span class="line" id="L54"> <span class="tok-kw">switch</span> (precision) {</span>
<span class="line" id="L55"> <span class="tok-number">0</span> =&gt; {</span>
<span class="line" id="L56"> <span class="tok-kw">var</span> table = Self{ .q8 = <span class="tok-null">undefined</span> };</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"> <span class="tok-kw">var</span> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L59"> <span class="tok-kw">while</span> (offset &lt; <span class="tok-number">64</span>) : (offset += <span class="tok-number">1</span>) {</span>
<span class="line" id="L60"> <span class="tok-kw">const</span> value = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L61"> table.q8[ZigzagOffsets[offset]] = value;</span>
<span class="line" id="L62"> }</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> <span class="tok-kw">if</span> (JPEG_DEBUG) {</span>
<span class="line" id="L65"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L66"> <span class="tok-kw">while</span> (i &lt; <span class="tok-number">8</span>) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L67"> <span class="tok-kw">var</span> j: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L68"> <span class="tok-kw">while</span> (j &lt; <span class="tok-number">8</span>) : (j += <span class="tok-number">1</span>) {</span>
<span class="line" id="L69"> std.debug.print(<span class="tok-str">&quot;{d:4} &quot;</span>, .{table.q8[i * <span class="tok-number">8</span> + j]});</span>
<span class="line" id="L70"> }</span>
<span class="line" id="L71"> std.debug.print(<span class="tok-str">&quot;\n&quot;</span>, .{});</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> <span class="tok-kw">return</span> table;</span>
<span class="line" id="L76"> },</span>
<span class="line" id="L77"> <span class="tok-number">1</span> =&gt; {</span>
<span class="line" id="L78"> <span class="tok-kw">var</span> table = Self{ .q16 = <span class="tok-null">undefined</span> };</span>
<span class="line" id="L79"></span>
<span class="line" id="L80"> <span class="tok-kw">var</span> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L81"> <span class="tok-kw">while</span> (offset &lt; <span class="tok-number">64</span>) : (offset += <span class="tok-number">1</span>) {</span>
<span class="line" id="L82"> <span class="tok-kw">const</span> value = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big);</span>
<span class="line" id="L83"> table.q16[ZigzagOffsets[offset]] = value;</span>
<span class="line" id="L84"> }</span>
<span class="line" id="L85"></span>
<span class="line" id="L86"> <span class="tok-kw">return</span> table;</span>
<span class="line" id="L87"> },</span>
<span class="line" id="L88"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> ImageReadError.InvalidData,</span>
<span class="line" id="L89"> }</span>
<span class="line" id="L90"> }</span>
<span class="line" id="L91">};</span>
<span class="line" id="L92"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! general utilizies and constants</span></span>
<span class="line" id="L2"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-comment">// See figure A.6 in T.81.</span>
</span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ZigzagOffsets = blk: {</span>
<span class="line" id="L6"> <span class="tok-kw">var</span> offsets: [<span class="tok-number">64</span>]<span class="tok-type">usize</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L7"> offsets[<span class="tok-number">0</span>] = <span class="tok-number">0</span>;</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"> <span class="tok-kw">var</span> current_offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L10"> <span class="tok-kw">var</span> direction: <span class="tok-kw">enum</span> { north_east, south_west } = .north_east;</span>
<span class="line" id="L11"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L12"> <span class="tok-kw">while</span> (i &lt; <span class="tok-number">64</span>) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L13"> <span class="tok-kw">switch</span> (direction) {</span>
<span class="line" id="L14"> .north_east =&gt; {</span>
<span class="line" id="L15"> <span class="tok-kw">if</span> (current_offset &lt; <span class="tok-number">8</span>) {</span>
<span class="line" id="L16"> <span class="tok-comment">// Hit top edge</span>
</span>
<span class="line" id="L17"> current_offset += <span class="tok-number">1</span>;</span>
<span class="line" id="L18"> direction = .south_west;</span>
<span class="line" id="L19"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (current_offset % <span class="tok-number">8</span> == <span class="tok-number">7</span>) {</span>
<span class="line" id="L20"> <span class="tok-comment">// Hit right edge</span>
</span>
<span class="line" id="L21"> current_offset += <span class="tok-number">8</span>;</span>
<span class="line" id="L22"> direction = .south_west;</span>
<span class="line" id="L23"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L24"> current_offset -= <span class="tok-number">7</span>;</span>
<span class="line" id="L25"> }</span>
<span class="line" id="L26"> },</span>
<span class="line" id="L27"> .south_west =&gt; {</span>
<span class="line" id="L28"> <span class="tok-kw">if</span> (current_offset &gt;= <span class="tok-number">56</span>) {</span>
<span class="line" id="L29"> <span class="tok-comment">// Hit bottom edge</span>
</span>
<span class="line" id="L30"> current_offset += <span class="tok-number">1</span>;</span>
<span class="line" id="L31"> direction = .north_east;</span>
<span class="line" id="L32"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (current_offset % <span class="tok-number">8</span> == <span class="tok-number">0</span>) {</span>
<span class="line" id="L33"> <span class="tok-comment">// Hit left edge</span>
</span>
<span class="line" id="L34"> current_offset += <span class="tok-number">8</span>;</span>
<span class="line" id="L35"> direction = .north_east;</span>
<span class="line" id="L36"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L37"> current_offset += <span class="tok-number">7</span>;</span>
<span class="line" id="L38"> }</span>
<span class="line" id="L39"> },</span>
<span class="line" id="L40"> }</span>
<span class="line" id="L41"></span>
<span class="line" id="L42"> <span class="tok-kw">if</span> (current_offset &gt;= <span class="tok-number">64</span>) {</span>
<span class="line" id="L43"> <span class="tok-builtin">@compileError</span>(std.fmt.comptimePrint(<span class="tok-str">&quot;ZigzagOffsets: Hit offset {} (&gt;= 64) at index {}!\n&quot;</span>, .{ current_offset, i }));</span>
<span class="line" id="L44"> }</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> offsets[i] = current_offset;</span>
<span class="line" id="L47"> }</span>
<span class="line" id="L48"></span>
<span class="line" id="L49"> <span class="tok-kw">break</span> :blk offsets;</span>
<span class="line" id="L50">};</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"><span class="tok-comment">/// The precalculated IDCT multipliers. This is possible because the only part of</span></span>
<span class="line" id="L53"><span class="tok-comment">/// the IDCT calculation that changes between runs is the coefficients.</span></span>
<span class="line" id="L54"><span class="tok-comment">/// see A.3.3 of t.81 1992</span></span>
<span class="line" id="L55"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> IDCTMultipliers = blk: {</span>
<span class="line" id="L56"> <span class="tok-kw">var</span> multipliers: [<span class="tok-number">8</span>][<span class="tok-number">8</span>][<span class="tok-number">8</span>][<span class="tok-number">8</span>]<span class="tok-type">f32</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L57"> <span class="tok-builtin">@setEvalBranchQuota</span>(<span class="tok-number">4700</span>);</span>
<span class="line" id="L58"></span>
<span class="line" id="L59"> <span class="tok-kw">var</span> y: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L60"> <span class="tok-kw">while</span> (y &lt; <span class="tok-number">8</span>) : (y += <span class="tok-number">1</span>) {</span>
<span class="line" id="L61"> <span class="tok-kw">var</span> x: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L62"> <span class="tok-kw">while</span> (x &lt; <span class="tok-number">8</span>) : (x += <span class="tok-number">1</span>) {</span>
<span class="line" id="L63"> <span class="tok-kw">var</span> u: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L64"> <span class="tok-kw">while</span> (u &lt; <span class="tok-number">8</span>) : (u += <span class="tok-number">1</span>) {</span>
<span class="line" id="L65"> <span class="tok-kw">var</span> v: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L66"> <span class="tok-kw">while</span> (v &lt; <span class="tok-number">8</span>) : (v += <span class="tok-number">1</span>) {</span>
<span class="line" id="L67"> <span class="tok-kw">const</span> C_u: <span class="tok-type">f32</span> = <span class="tok-kw">if</span> (u == <span class="tok-number">0</span>) <span class="tok-number">1.0</span> / <span class="tok-builtin">@sqrt</span>(<span class="tok-number">2.0</span>) <span class="tok-kw">else</span> <span class="tok-number">1.0</span>;</span>
<span class="line" id="L68"> <span class="tok-kw">const</span> C_v: <span class="tok-type">f32</span> = <span class="tok-kw">if</span> (v == <span class="tok-number">0</span>) <span class="tok-number">1.0</span> / <span class="tok-builtin">@sqrt</span>(<span class="tok-number">2.0</span>) <span class="tok-kw">else</span> <span class="tok-number">1.0</span>;</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">const</span> x_cosine = <span class="tok-builtin">@cos</span>(((<span class="tok-number">2</span> * <span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(x)) + <span class="tok-number">1</span>) * <span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(u)) * std.math.pi) / <span class="tok-number">16.0</span>);</span>
<span class="line" id="L71"> <span class="tok-kw">const</span> y_cosine = <span class="tok-builtin">@cos</span>(((<span class="tok-number">2</span> * <span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(y)) + <span class="tok-number">1</span>) * <span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(v)) * std.math.pi) / <span class="tok-number">16.0</span>);</span>
<span class="line" id="L72"> <span class="tok-kw">const</span> uv_value = C_u * C_v * x_cosine * y_cosine;</span>
<span class="line" id="L73"> multipliers[y][x][u][v] = uv_value;</span>
<span class="line" id="L74"> }</span>
<span class="line" id="L75"> }</span>
<span class="line" id="L76"> }</span>
<span class="line" id="L77"> }</span>
<span class="line" id="L78"></span>
<span class="line" id="L79"> <span class="tok-kw">break</span> :blk multipliers;</span>
<span class="line" id="L80">};</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"><span class="tok-comment">/// Marker codes, see t-81 section B.1.1.3</span></span>
<span class="line" id="L83"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Markers = <span class="tok-kw">enum</span>(<span class="tok-type">u16</span>) {</span>
<span class="line" id="L84"> <span class="tok-comment">// Start of Frame markers, non-differential, Huffman coding</span>
</span>
<span class="line" id="L85"> sof0 = <span class="tok-number">0xFFC0</span>, <span class="tok-comment">// Baseline DCT</span>
</span>
<span class="line" id="L86"> sof1 = <span class="tok-number">0xFFC1</span>, <span class="tok-comment">// Extended sequential DCT</span>
</span>
<span class="line" id="L87"> sof2 = <span class="tok-number">0xFFC2</span>, <span class="tok-comment">// Progressive DCT</span>
</span>
<span class="line" id="L88"> sof3 = <span class="tok-number">0xFFC3</span>, <span class="tok-comment">// Lossless sequential</span>
</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> <span class="tok-comment">// Start of Frame markers, differential, Huffman coding</span>
</span>
<span class="line" id="L91"> sof5 = <span class="tok-number">0xFFC5</span>, <span class="tok-comment">// Differential sequential DCT</span>
</span>
<span class="line" id="L92"> sof6 = <span class="tok-number">0xFFC6</span>, <span class="tok-comment">// Differential progressive DCT</span>
</span>
<span class="line" id="L93"> sof7 = <span class="tok-number">0xFFC7</span>, <span class="tok-comment">// Differential lossless sequential</span>
</span>
<span class="line" id="L94"></span>
<span class="line" id="L95"> <span class="tok-comment">// Start of Frame markers, non-differential, arithmetic coding</span>
</span>
<span class="line" id="L96"> sof9 = <span class="tok-number">0xFFC9</span>, <span class="tok-comment">// Extended sequential DCT</span>
</span>
<span class="line" id="L97"> sof10 = <span class="tok-number">0xFFCA</span>, <span class="tok-comment">// Progressive DCT</span>
</span>
<span class="line" id="L98"> sof11 = <span class="tok-number">0xFFCB</span>, <span class="tok-comment">// Lossless sequential</span>
</span>
<span class="line" id="L99"></span>
<span class="line" id="L100"> <span class="tok-comment">// Start of Frame markers, differential, arithmetic coding</span>
</span>
<span class="line" id="L101"> sof13 = <span class="tok-number">0xFFCD</span>, <span class="tok-comment">// Differential sequential DCT</span>
</span>
<span class="line" id="L102"> sof14 = <span class="tok-number">0xFFCE</span>, <span class="tok-comment">// Differential progressive DCT</span>
</span>
<span class="line" id="L103"> sof15 = <span class="tok-number">0xFFCF</span>, <span class="tok-comment">// Differential lossless sequential</span>
</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> define_huffman_tables = <span class="tok-number">0xFFC4</span>,</span>
<span class="line" id="L106"> define_arithmetic_coding = <span class="tok-number">0xFFCC</span>,</span>
<span class="line" id="L107"></span>
<span class="line" id="L108"> <span class="tok-comment">// 0xFFD0-0xFFD7: Restart markers</span>
</span>
<span class="line" id="L109"> restart0 = <span class="tok-number">0xFFD0</span>,</span>
<span class="line" id="L110"> restart1 = <span class="tok-number">0xFFD1</span>,</span>
<span class="line" id="L111"> restart2 = <span class="tok-number">0xFFD2</span>,</span>
<span class="line" id="L112"> restart3 = <span class="tok-number">0xFFD3</span>,</span>
<span class="line" id="L113"> restart4 = <span class="tok-number">0xFFD4</span>,</span>
<span class="line" id="L114"> restart5 = <span class="tok-number">0xFFD5</span>,</span>
<span class="line" id="L115"> restart6 = <span class="tok-number">0xFFD6</span>,</span>
<span class="line" id="L116"> restart7 = <span class="tok-number">0xFFD7</span>,</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"> start_of_image = <span class="tok-number">0xFFD8</span>,</span>
<span class="line" id="L119"> end_of_image = <span class="tok-number">0xFFD9</span>,</span>
<span class="line" id="L120"> start_of_scan = <span class="tok-number">0xFFDA</span>,</span>
<span class="line" id="L121"> define_quantization_tables = <span class="tok-number">0xFFDB</span>,</span>
<span class="line" id="L122"> define_number_of_lines = <span class="tok-number">0xFFDC</span>,</span>
<span class="line" id="L123"> define_restart_interval = <span class="tok-number">0xFFDD</span>,</span>
<span class="line" id="L124"> define_hierarchical_progression = <span class="tok-number">0xFFDE</span>,</span>
<span class="line" id="L125"> expand_reference_components = <span class="tok-number">0xFFDF</span>,</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"> <span class="tok-comment">// 0xFFE0-0xFFEF application segments markers add 0-15 as needed.</span>
</span>
<span class="line" id="L128"> application0 = <span class="tok-number">0xFFE0</span>,</span>
<span class="line" id="L129"></span>
<span class="line" id="L130"> <span class="tok-comment">// 0xFFF0-0xFFFD jpeg extension markers add 0-13 as needed.</span>
</span>
<span class="line" id="L131"> jpeg_extension0 = <span class="tok-number">0xFFF0</span>,</span>
<span class="line" id="L132"> comment = <span class="tok-number">0xFFFE</span>,</span>
<span class="line" id="L133"></span>
<span class="line" id="L134"> <span class="tok-comment">// reserved markers from 0xFF01-0xFFBF, add as needed</span>
</span>
<span class="line" id="L135">};</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> MAX_COMPONENTS = <span class="tok-number">3</span>;</span>
<span class="line" id="L138"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> MAX_BLOCKS = <span class="tok-number">8</span>;</span>
<span class="line" id="L139"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> MCU = [<span class="tok-number">64</span>]<span class="tok-type">i32</span>;</span>
<span class="line" id="L140"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Adapted from https://github.com/MasterQ32/zig-gamedev-lib/blob/master/src/netbpm.zig</span>
</span>
<span class="line" id="L2"><span class="tok-comment">// with permission from Felix Queißner</span>
</span>
<span class="line" id="L3"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> ImageError = Image.Error;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L10"><span class="tok-kw">const</span> ImageWriteError = Image.WriteError;</span>
<span class="line" id="L11"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L12"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L13"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../utils.zig&quot;</span>);</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-comment">// this file implements the Portable Anymap specification provided by</span>
</span>
<span class="line" id="L16"><span class="tok-comment">// http://netpbm.sourceforge.net/doc/pbm.html // P1, P4 =&gt; bitmap</span>
</span>
<span class="line" id="L17"><span class="tok-comment">// http://netpbm.sourceforge.net/doc/pgm.html // P2, P5 =&gt; graymap</span>
</span>
<span class="line" id="L18"><span class="tok-comment">// http://netpbm.sourceforge.net/doc/ppm.html // P3, P6 =&gt; pixmap</span>
</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-comment">/// one of the three types a netbpm graphic could be stored in.</span></span>
<span class="line" id="L21"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Format = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L22"> <span class="tok-comment">/// the image contains black-and-white pixels.</span></span>
<span class="line" id="L23"> bitmap,</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"> <span class="tok-comment">/// the image contains grayscale pixels.</span></span>
<span class="line" id="L26"> grayscale,</span>
<span class="line" id="L27"></span>
<span class="line" id="L28"> <span class="tok-comment">/// the image contains RGB pixels.</span></span>
<span class="line" id="L29"> rgb,</span>
<span class="line" id="L30">};</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Header = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L33"> format: Format,</span>
<span class="line" id="L34"> binary: <span class="tok-type">bool</span>,</span>
<span class="line" id="L35"> width: <span class="tok-type">usize</span>,</span>
<span class="line" id="L36"> height: <span class="tok-type">usize</span>,</span>
<span class="line" id="L37"> max_value: <span class="tok-type">usize</span>,</span>
<span class="line" id="L38">};</span>
<span class="line" id="L39"></span>
<span class="line" id="L40"><span class="tok-kw">fn</span> <span class="tok-fn">parseHeader</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!Header {</span>
<span class="line" id="L41"> <span class="tok-kw">var</span> header: Header = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"> <span class="tok-kw">var</span> magic: [<span class="tok-number">2</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L44"> _ = <span class="tok-kw">try</span> reader.read(magic[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P1&quot;</span>)) {</span>
<span class="line" id="L47"> header.binary = <span class="tok-null">false</span>;</span>
<span class="line" id="L48"> header.format = .bitmap;</span>
<span class="line" id="L49"> header.max_value = <span class="tok-number">1</span>;</span>
<span class="line" id="L50"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P2&quot;</span>)) {</span>
<span class="line" id="L51"> header.binary = <span class="tok-null">false</span>;</span>
<span class="line" id="L52"> header.format = .grayscale;</span>
<span class="line" id="L53"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P3&quot;</span>)) {</span>
<span class="line" id="L54"> header.binary = <span class="tok-null">false</span>;</span>
<span class="line" id="L55"> header.format = .rgb;</span>
<span class="line" id="L56"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P4&quot;</span>)) {</span>
<span class="line" id="L57"> header.binary = <span class="tok-null">true</span>;</span>
<span class="line" id="L58"> header.format = .bitmap;</span>
<span class="line" id="L59"> header.max_value = <span class="tok-number">1</span>;</span>
<span class="line" id="L60"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P5&quot;</span>)) {</span>
<span class="line" id="L61"> header.binary = <span class="tok-null">true</span>;</span>
<span class="line" id="L62"> header.format = .grayscale;</span>
<span class="line" id="L63"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P6&quot;</span>)) {</span>
<span class="line" id="L64"> header.binary = <span class="tok-null">true</span>;</span>
<span class="line" id="L65"> header.format = .rgb;</span>
<span class="line" id="L66"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L67"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">var</span> read_buffer: [<span class="tok-number">16</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L71"></span>
<span class="line" id="L72"> header.width = <span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L73"> header.height = <span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L74"> <span class="tok-kw">if</span> (header.format != .bitmap) {</span>
<span class="line" id="L75"> header.max_value = <span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L76"> }</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"> <span class="tok-kw">return</span> header;</span>
<span class="line" id="L79">}</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"><span class="tok-kw">fn</span> <span class="tok-fn">isWhitespace</span>(b: <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L82"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (b) {</span>
<span class="line" id="L83"> <span class="tok-comment">// Whitespace (blanks, TABs, CRs, LFs).</span>
</span>
<span class="line" id="L84"> <span class="tok-str">'\n'</span>, <span class="tok-str">'\r'</span>, <span class="tok-str">' '</span>, <span class="tok-str">'\t'</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L85"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L86"> };</span>
<span class="line" id="L87">}</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"><span class="tok-kw">fn</span> <span class="tok-fn">readNextByte</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">u8</span> {</span>
<span class="line" id="L90"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L91"> <span class="tok-kw">const</span> b = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L92"> <span class="tok-kw">switch</span> (b) {</span>
<span class="line" id="L93"> <span class="tok-comment">// Before the whitespace character that delimits the raster, any characters</span>
</span>
<span class="line" id="L94"> <span class="tok-comment">// from a &quot;#&quot; through the next carriage return or newline character, is a</span>
</span>
<span class="line" id="L95"> <span class="tok-comment">// comment and is ignored. Note that this is rather unconventional, because</span>
</span>
<span class="line" id="L96"> <span class="tok-comment">// a comment can actually be in the middle of what you might consider a token.</span>
</span>
<span class="line" id="L97"> <span class="tok-comment">// Note also that this means if you have a comment right before the raster,</span>
</span>
<span class="line" id="L98"> <span class="tok-comment">// the newline at the end of the comment is not sufficient to delimit the raster.</span>
</span>
<span class="line" id="L99"> <span class="tok-str">'#'</span> =&gt; {</span>
<span class="line" id="L100"> <span class="tok-comment">// eat up comment</span>
</span>
<span class="line" id="L101"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L102"> <span class="tok-kw">const</span> c = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L103"> <span class="tok-kw">switch</span> (c) {</span>
<span class="line" id="L104"> <span class="tok-str">'\r'</span>, <span class="tok-str">'\n'</span> =&gt; <span class="tok-kw">break</span>,</span>
<span class="line" id="L105"> <span class="tok-kw">else</span> =&gt; {},</span>
<span class="line" id="L106"> }</span>
<span class="line" id="L107"> }</span>
<span class="line" id="L108"> },</span>
<span class="line" id="L109"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> b,</span>
<span class="line" id="L110"> }</span>
<span class="line" id="L111"> }</span>
<span class="line" id="L112">}</span>
<span class="line" id="L113"></span>
<span class="line" id="L114"><span class="tok-comment">/// skips whitespace and comments, then reads a number from the stream.</span></span>
<span class="line" id="L115"><span class="tok-comment">/// this function reads one whitespace behind the number as a terminator.</span></span>
<span class="line" id="L116"><span class="tok-kw">fn</span> <span class="tok-fn">parseNumber</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader, buffer: []<span class="tok-type">u8</span>) ImageReadError!<span class="tok-type">usize</span> {</span>
<span class="line" id="L117"> <span class="tok-kw">var</span> input_length: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L118"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L119"> <span class="tok-kw">const</span> b = <span class="tok-kw">try</span> readNextByte(reader);</span>
<span class="line" id="L120"> <span class="tok-kw">if</span> (isWhitespace(b)) {</span>
<span class="line" id="L121"> <span class="tok-kw">if</span> (input_length &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L122"> <span class="tok-kw">return</span> std.fmt.parseInt(<span class="tok-type">usize</span>, buffer[<span class="tok-number">0</span>..input_length], <span class="tok-number">10</span>) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L123"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L124"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L125"> }</span>
<span class="line" id="L126"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (input_length &gt;= buffer.len)</span>
<span class="line" id="L128"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.OutOfMemory;</span>
<span class="line" id="L129"> buffer[input_length] = b;</span>
<span class="line" id="L130"> input_length += <span class="tok-number">1</span>;</span>
<span class="line" id="L131"> }</span>
<span class="line" id="L132"> }</span>
<span class="line" id="L133">}</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"><span class="tok-kw">fn</span> <span class="tok-fn">loadBinaryBitmap</span>(header: Header, data: []color.Grayscale1, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L136"> <span class="tok-kw">var</span> bit_reader = std.io.bitReader(.big, reader);</span>
<span class="line" id="L137"></span>
<span class="line" id="L138"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..header.height) |row_index| {</span>
<span class="line" id="L139"> <span class="tok-kw">for</span> (data[row_index * header.width ..][<span class="tok-number">0</span>..header.width]) |*sample| {</span>
<span class="line" id="L140"> sample.value = ~(<span class="tok-kw">try</span> bit_reader.readBitsNoEof(<span class="tok-type">u1</span>, <span class="tok-number">1</span>));</span>
<span class="line" id="L141"> }</span>
<span class="line" id="L142"> bit_reader.alignToByte();</span>
<span class="line" id="L143"> }</span>
<span class="line" id="L144">}</span>
<span class="line" id="L145"></span>
<span class="line" id="L146"><span class="tok-kw">fn</span> <span class="tok-fn">loadAsciiBitmap</span>(header: Header, data: []color.Grayscale1, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L147"> <span class="tok-kw">var</span> data_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L148"> <span class="tok-kw">const</span> data_end = header.width * header.height;</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"> <span class="tok-kw">while</span> (data_index &lt; data_end) {</span>
<span class="line" id="L151"> <span class="tok-kw">const</span> b = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L152"> <span class="tok-kw">if</span> (isWhitespace(b)) {</span>
<span class="line" id="L153"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L154"> }</span>
<span class="line" id="L155"></span>
<span class="line" id="L156"> <span class="tok-comment">// 1 is black, 0 is white in PBM spec.</span>
</span>
<span class="line" id="L157"> <span class="tok-comment">// we use 1=white, 0=black in u1 format</span>
</span>
<span class="line" id="L158"> <span class="tok-kw">const</span> pixel = <span class="tok-kw">if</span> (b == <span class="tok-str">'0'</span>) <span class="tok-builtin">@as</span>(<span class="tok-type">u1</span>, <span class="tok-number">1</span>) <span class="tok-kw">else</span> <span class="tok-builtin">@as</span>(<span class="tok-type">u1</span>, <span class="tok-number">0</span>);</span>
<span class="line" id="L159"> data[data_index] = color.Grayscale1{ .value = pixel };</span>
<span class="line" id="L160"></span>
<span class="line" id="L161"> data_index += <span class="tok-number">1</span>;</span>
<span class="line" id="L162"> }</span>
<span class="line" id="L163">}</span>
<span class="line" id="L164"></span>
<span class="line" id="L165"><span class="tok-kw">fn</span> <span class="tok-fn">readLinearizedValue</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader, max_value: <span class="tok-type">usize</span>) ImageReadError!<span class="tok-type">u8</span> {</span>
<span class="line" id="L166"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (max_value &gt; <span class="tok-number">255</span>)</span>
<span class="line" id="L167"> <span class="tok-builtin">@truncate</span>(<span class="tok-number">255</span> * <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big)) / max_value)</span>
<span class="line" id="L168"> <span class="tok-kw">else</span></span>
<span class="line" id="L169"> <span class="tok-builtin">@truncate</span>(<span class="tok-number">255</span> * <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-kw">try</span> reader.readByte()) / max_value);</span>
<span class="line" id="L170">}</span>
<span class="line" id="L171"></span>
<span class="line" id="L172"><span class="tok-kw">fn</span> <span class="tok-fn">loadBinaryGraymap</span>(header: Header, pixels: *color.PixelStorage, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L173"> <span class="tok-kw">var</span> data_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L174"> <span class="tok-kw">const</span> data_end = header.width * header.height;</span>
<span class="line" id="L175"> <span class="tok-kw">if</span> (header.max_value &lt;= <span class="tok-number">255</span>) {</span>
<span class="line" id="L176"> <span class="tok-kw">while</span> (data_index &lt; data_end) : (data_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L177"> pixels.grayscale8[data_index] = color.Grayscale8{ .value = <span class="tok-kw">try</span> readLinearizedValue(reader, header.max_value) };</span>
<span class="line" id="L178"> }</span>
<span class="line" id="L179"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L180"> <span class="tok-kw">while</span> (data_index &lt; data_end) : (data_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L181"> pixels.grayscale16[data_index] = color.Grayscale16{ .value = <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .big) };</span>
<span class="line" id="L182"> }</span>
<span class="line" id="L183"> }</span>
<span class="line" id="L184">}</span>
<span class="line" id="L185"></span>
<span class="line" id="L186"><span class="tok-kw">fn</span> <span class="tok-fn">loadAsciiGraymap</span>(header: Header, pixels: *color.PixelStorage, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L187"> <span class="tok-kw">var</span> read_buffer: [<span class="tok-number">16</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"> <span class="tok-kw">var</span> data_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L190"> <span class="tok-kw">const</span> data_end = header.width * header.height;</span>
<span class="line" id="L191"></span>
<span class="line" id="L192"> <span class="tok-kw">if</span> (header.max_value &lt;= <span class="tok-number">255</span>) {</span>
<span class="line" id="L193"> <span class="tok-kw">while</span> (data_index &lt; data_end) : (data_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L194"> pixels.grayscale8[data_index] = color.Grayscale8{ .value = <span class="tok-builtin">@truncate</span>(<span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..])) };</span>
<span class="line" id="L195"> }</span>
<span class="line" id="L196"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L197"> <span class="tok-kw">while</span> (data_index &lt; data_end) : (data_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L198"> pixels.grayscale16[data_index] = color.Grayscale16{ .value = <span class="tok-builtin">@truncate</span>(<span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..])) };</span>
<span class="line" id="L199"> }</span>
<span class="line" id="L200"> }</span>
<span class="line" id="L201">}</span>
<span class="line" id="L202"></span>
<span class="line" id="L203"><span class="tok-kw">fn</span> <span class="tok-fn">loadBinaryRgbmap</span>(header: Header, data: []color.Rgb24, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L204"> <span class="tok-kw">var</span> data_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L205"> <span class="tok-kw">const</span> data_end = header.width * header.height;</span>
<span class="line" id="L206"></span>
<span class="line" id="L207"> <span class="tok-kw">while</span> (data_index &lt; data_end) : (data_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L208"> data[data_index] = color.Rgb24{</span>
<span class="line" id="L209"> .r = <span class="tok-kw">try</span> readLinearizedValue(reader, header.max_value),</span>
<span class="line" id="L210"> .g = <span class="tok-kw">try</span> readLinearizedValue(reader, header.max_value),</span>
<span class="line" id="L211"> .b = <span class="tok-kw">try</span> readLinearizedValue(reader, header.max_value),</span>
<span class="line" id="L212"> };</span>
<span class="line" id="L213"> }</span>
<span class="line" id="L214">}</span>
<span class="line" id="L215"></span>
<span class="line" id="L216"><span class="tok-kw">fn</span> <span class="tok-fn">loadAsciiRgbmap</span>(header: Header, data: []color.Rgb24, reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L217"> <span class="tok-kw">var</span> read_buffer: [<span class="tok-number">16</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L218"></span>
<span class="line" id="L219"> <span class="tok-kw">var</span> data_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L220"> <span class="tok-kw">const</span> data_end = header.width * header.height;</span>
<span class="line" id="L221"></span>
<span class="line" id="L222"> <span class="tok-kw">while</span> (data_index &lt; data_end) : (data_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L223"> <span class="tok-kw">const</span> r = <span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L224"> <span class="tok-kw">const</span> g = <span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L225"> <span class="tok-kw">const</span> b = <span class="tok-kw">try</span> parseNumber(reader, read_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L226"></span>
<span class="line" id="L227"> data[data_index] = color.Rgb24{</span>
<span class="line" id="L228"> .r = <span class="tok-builtin">@truncate</span>(<span class="tok-number">255</span> * r / header.max_value),</span>
<span class="line" id="L229"> .g = <span class="tok-builtin">@truncate</span>(<span class="tok-number">255</span> * g / header.max_value),</span>
<span class="line" id="L230"> .b = <span class="tok-builtin">@truncate</span>(<span class="tok-number">255</span> * b / header.max_value),</span>
<span class="line" id="L231"> };</span>
<span class="line" id="L232"> }</span>
<span class="line" id="L233">}</span>
<span class="line" id="L234"></span>
<span class="line" id="L235"><span class="tok-kw">fn</span> <span class="tok-fn">Netpbm</span>(<span class="tok-kw">comptime</span> image_format: Image.Format, <span class="tok-kw">comptime</span> header_numbers: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L236"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L237"> header: Header = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L238"></span>
<span class="line" id="L239"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L240"></span>
<span class="line" id="L241"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L242"> binary: <span class="tok-type">bool</span> = <span class="tok-null">true</span>,</span>
<span class="line" id="L243"> };</span>
<span class="line" id="L244"></span>
<span class="line" id="L245"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L246"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L247"> .format = format,</span>
<span class="line" id="L248"> .formatDetect = formatDetect,</span>
<span class="line" id="L249"> .readImage = readImage,</span>
<span class="line" id="L250"> .writeImage = writeImage,</span>
<span class="line" id="L251"> };</span>
<span class="line" id="L252"> }</span>
<span class="line" id="L253"></span>
<span class="line" id="L254"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L255"> <span class="tok-kw">return</span> image_format;</span>
<span class="line" id="L256"> }</span>
<span class="line" id="L257"></span>
<span class="line" id="L258"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) ImageReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L259"> <span class="tok-kw">var</span> magic_number_buffer: [<span class="tok-number">2</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L260"> _ = <span class="tok-kw">try</span> stream.read(magic_number_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L261"></span>
<span class="line" id="L262"> <span class="tok-kw">if</span> (magic_number_buffer[<span class="tok-number">0</span>] != <span class="tok-str">'P'</span>) {</span>
<span class="line" id="L263"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L264"> }</span>
<span class="line" id="L265"></span>
<span class="line" id="L266"> <span class="tok-kw">var</span> found = <span class="tok-null">false</span>;</span>
<span class="line" id="L267"></span>
<span class="line" id="L268"> <span class="tok-kw">for</span> (header_numbers) |number| {</span>
<span class="line" id="L269"> <span class="tok-kw">if</span> (magic_number_buffer[<span class="tok-number">1</span>] == number) {</span>
<span class="line" id="L270"> found = <span class="tok-null">true</span>;</span>
<span class="line" id="L271"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L272"> }</span>
<span class="line" id="L273"> }</span>
<span class="line" id="L274"></span>
<span class="line" id="L275"> <span class="tok-kw">return</span> found;</span>
<span class="line" id="L276"> }</span>
<span class="line" id="L277"></span>
<span class="line" id="L278"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: Allocator, stream: *Image.Stream) ImageReadError!Image {</span>
<span class="line" id="L279"> <span class="tok-kw">var</span> result = Image.init(allocator);</span>
<span class="line" id="L280"> <span class="tok-kw">errdefer</span> result.deinit();</span>
<span class="line" id="L281"> <span class="tok-kw">var</span> netpbm_file = Self{};</span>
<span class="line" id="L282"></span>
<span class="line" id="L283"> <span class="tok-kw">const</span> pixels = <span class="tok-kw">try</span> netpbm_file.read(allocator, stream);</span>
<span class="line" id="L284"></span>
<span class="line" id="L285"> result.width = netpbm_file.header.width;</span>
<span class="line" id="L286"> result.height = netpbm_file.header.height;</span>
<span class="line" id="L287"> result.pixels = pixels;</span>
<span class="line" id="L288"></span>
<span class="line" id="L289"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L290"> }</span>
<span class="line" id="L291"></span>
<span class="line" id="L292"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: Allocator, write_stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L293"> _ = allocator;</span>
<span class="line" id="L294"></span>
<span class="line" id="L295"> <span class="tok-kw">var</span> netpbm_file = Self{};</span>
<span class="line" id="L296"> netpbm_file.header.binary = <span class="tok-kw">switch</span> (encoder_options) {</span>
<span class="line" id="L297"> .pbm =&gt; |options| options.binary,</span>
<span class="line" id="L298"> .pgm =&gt; |options| options.binary,</span>
<span class="line" id="L299"> .ppm =&gt; |options| options.binary,</span>
<span class="line" id="L300"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L301"> };</span>
<span class="line" id="L302"></span>
<span class="line" id="L303"> netpbm_file.header.width = image.width;</span>
<span class="line" id="L304"> netpbm_file.header.height = image.height;</span>
<span class="line" id="L305"> netpbm_file.header.format = <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L306"> .grayscale1 =&gt; Format.bitmap,</span>
<span class="line" id="L307"> .grayscale8, .grayscale16 =&gt; Format.grayscale,</span>
<span class="line" id="L308"> .rgb24 =&gt; Format.rgb,</span>
<span class="line" id="L309"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L310"> };</span>
<span class="line" id="L311"></span>
<span class="line" id="L312"> netpbm_file.header.max_value = <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L313"> .grayscale16 =&gt; std.math.maxInt(<span class="tok-type">u16</span>),</span>
<span class="line" id="L314"> .grayscale1 =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L315"> <span class="tok-kw">else</span> =&gt; std.math.maxInt(<span class="tok-type">u8</span>),</span>
<span class="line" id="L316"> };</span>
<span class="line" id="L317"></span>
<span class="line" id="L318"> <span class="tok-kw">try</span> netpbm_file.write(write_stream, image.pixels);</span>
<span class="line" id="L319"> }</span>
<span class="line" id="L320"></span>
<span class="line" id="L321"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelFormat</span>(self: Self) ImageReadError!PixelFormat {</span>
<span class="line" id="L322"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.header.format) {</span>
<span class="line" id="L323"> .bitmap =&gt; PixelFormat.grayscale1,</span>
<span class="line" id="L324"> .grayscale =&gt; <span class="tok-kw">switch</span> (self.header.max_value) {</span>
<span class="line" id="L325"> <span class="tok-number">0</span>...<span class="tok-number">255</span> =&gt; PixelFormat.grayscale8,</span>
<span class="line" id="L326"> <span class="tok-kw">else</span> =&gt; PixelFormat.grayscale16,</span>
<span class="line" id="L327"> },</span>
<span class="line" id="L328"> .rgb =&gt; PixelFormat.rgb24,</span>
<span class="line" id="L329"> };</span>
<span class="line" id="L330"> }</span>
<span class="line" id="L331"></span>
<span class="line" id="L332"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(self: *Self, allocator: Allocator, stream: *Image.Stream) ImageReadError!color.PixelStorage {</span>
<span class="line" id="L333"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L334"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L335"> self.header = <span class="tok-kw">try</span> parseHeader(reader);</span>
<span class="line" id="L336"></span>
<span class="line" id="L337"> <span class="tok-kw">const</span> pixel_format = <span class="tok-kw">try</span> self.pixelFormat();</span>
<span class="line" id="L338"></span>
<span class="line" id="L339"> <span class="tok-kw">var</span> pixels = <span class="tok-kw">try</span> color.PixelStorage.init(allocator, pixel_format, self.header.width * self.header.height);</span>
<span class="line" id="L340"> <span class="tok-kw">errdefer</span> pixels.deinit(allocator);</span>
<span class="line" id="L341"></span>
<span class="line" id="L342"> <span class="tok-kw">switch</span> (self.header.format) {</span>
<span class="line" id="L343"> .bitmap =&gt; {</span>
<span class="line" id="L344"> <span class="tok-kw">if</span> (self.header.binary) {</span>
<span class="line" id="L345"> <span class="tok-kw">try</span> loadBinaryBitmap(self.header, pixels.grayscale1, reader);</span>
<span class="line" id="L346"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L347"> <span class="tok-kw">try</span> loadAsciiBitmap(self.header, pixels.grayscale1, reader);</span>
<span class="line" id="L348"> }</span>
<span class="line" id="L349"> },</span>
<span class="line" id="L350"> .grayscale =&gt; {</span>
<span class="line" id="L351"> <span class="tok-kw">if</span> (self.header.binary) {</span>
<span class="line" id="L352"> <span class="tok-kw">try</span> loadBinaryGraymap(self.header, &amp;pixels, reader);</span>
<span class="line" id="L353"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L354"> <span class="tok-kw">try</span> loadAsciiGraymap(self.header, &amp;pixels, reader);</span>
<span class="line" id="L355"> }</span>
<span class="line" id="L356"> },</span>
<span class="line" id="L357"> .rgb =&gt; {</span>
<span class="line" id="L358"> <span class="tok-kw">if</span> (self.header.binary) {</span>
<span class="line" id="L359"> <span class="tok-kw">try</span> loadBinaryRgbmap(self.header, pixels.rgb24, reader);</span>
<span class="line" id="L360"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L361"> <span class="tok-kw">try</span> loadAsciiRgbmap(self.header, pixels.rgb24, reader);</span>
<span class="line" id="L362"> }</span>
<span class="line" id="L363"> },</span>
<span class="line" id="L364"> }</span>
<span class="line" id="L365"></span>
<span class="line" id="L366"> <span class="tok-kw">return</span> pixels;</span>
<span class="line" id="L367"> }</span>
<span class="line" id="L368"></span>
<span class="line" id="L369"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: *Self, write_stream: *Image.Stream, pixels: color.PixelStorage) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L370"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceWriter(write_stream);</span>
<span class="line" id="L371"></span>
<span class="line" id="L372"> <span class="tok-kw">const</span> image_type = <span class="tok-kw">if</span> (self.header.binary) header_numbers[<span class="tok-number">1</span>] <span class="tok-kw">else</span> header_numbers[<span class="tok-number">0</span>];</span>
<span class="line" id="L373"> <span class="tok-kw">const</span> writer = buffered_stream.writer();</span>
<span class="line" id="L374"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;P{c}\n&quot;</span>, .{image_type});</span>
<span class="line" id="L375"> _ = <span class="tok-kw">try</span> writer.write(<span class="tok-str">&quot;# Created by zigimg\n&quot;</span>);</span>
<span class="line" id="L376"></span>
<span class="line" id="L377"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;{} {}\n&quot;</span>, .{ self.header.width, self.header.height });</span>
<span class="line" id="L378"></span>
<span class="line" id="L379"> <span class="tok-kw">if</span> (self.header.format != .bitmap) {</span>
<span class="line" id="L380"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;{}\n&quot;</span>, .{self.header.max_value});</span>
<span class="line" id="L381"> }</span>
<span class="line" id="L382"></span>
<span class="line" id="L383"> <span class="tok-kw">if</span> (self.header.binary) {</span>
<span class="line" id="L384"> <span class="tok-kw">switch</span> (self.header.format) {</span>
<span class="line" id="L385"> .bitmap =&gt; {</span>
<span class="line" id="L386"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L387"> .grayscale1 =&gt; |samples| {</span>
<span class="line" id="L388"> <span class="tok-kw">var</span> bit_writer = std.io.bitWriter(.big, writer);</span>
<span class="line" id="L389"></span>
<span class="line" id="L390"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..self.header.height) |row_index| {</span>
<span class="line" id="L391"> <span class="tok-kw">for</span> (samples[row_index * self.header.width ..][<span class="tok-number">0</span>..self.header.width]) |sample| {</span>
<span class="line" id="L392"> <span class="tok-kw">try</span> bit_writer.writeBits(~sample.value, <span class="tok-number">1</span>);</span>
<span class="line" id="L393"> }</span>
<span class="line" id="L394"> <span class="tok-kw">try</span> bit_writer.flushBits();</span>
<span class="line" id="L395"> }</span>
<span class="line" id="L396"> },</span>
<span class="line" id="L397"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L398"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L399"> },</span>
<span class="line" id="L400"> }</span>
<span class="line" id="L401"> },</span>
<span class="line" id="L402"> .grayscale =&gt; {</span>
<span class="line" id="L403"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L404"> .grayscale16 =&gt; {</span>
<span class="line" id="L405"> <span class="tok-kw">for</span> (pixels.grayscale16) |entry| {</span>
<span class="line" id="L406"> <span class="tok-comment">// Big due to 16-bit PGM being semi standardized as big-endian</span>
</span>
<span class="line" id="L407"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, entry.value, .big);</span>
<span class="line" id="L408"> }</span>
<span class="line" id="L409"> },</span>
<span class="line" id="L410"> .grayscale8 =&gt; {</span>
<span class="line" id="L411"> <span class="tok-kw">for</span> (pixels.grayscale8) |entry| {</span>
<span class="line" id="L412"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u8</span>, entry.value, .little);</span>
<span class="line" id="L413"> }</span>
<span class="line" id="L414"> },</span>
<span class="line" id="L415"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L416"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L417"> },</span>
<span class="line" id="L418"> }</span>
<span class="line" id="L419"> },</span>
<span class="line" id="L420"> .rgb =&gt; {</span>
<span class="line" id="L421"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L422"> .rgb24 =&gt; {</span>
<span class="line" id="L423"> <span class="tok-kw">for</span> (pixels.rgb24) |entry| {</span>
<span class="line" id="L424"> <span class="tok-kw">try</span> writer.writeByte(entry.r);</span>
<span class="line" id="L425"> <span class="tok-kw">try</span> writer.writeByte(entry.g);</span>
<span class="line" id="L426"> <span class="tok-kw">try</span> writer.writeByte(entry.b);</span>
<span class="line" id="L427"> }</span>
<span class="line" id="L428"> },</span>
<span class="line" id="L429"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L430"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L431"> },</span>
<span class="line" id="L432"> }</span>
<span class="line" id="L433"> },</span>
<span class="line" id="L434"> }</span>
<span class="line" id="L435"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L436"> <span class="tok-kw">switch</span> (self.header.format) {</span>
<span class="line" id="L437"> .bitmap =&gt; {</span>
<span class="line" id="L438"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L439"> .grayscale1 =&gt; {</span>
<span class="line" id="L440"> <span class="tok-kw">for</span> (pixels.grayscale1) |entry| {</span>
<span class="line" id="L441"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;{}&quot;</span>, .{~entry.value});</span>
<span class="line" id="L442"> }</span>
<span class="line" id="L443"> _ = <span class="tok-kw">try</span> writer.write(<span class="tok-str">&quot;\n&quot;</span>);</span>
<span class="line" id="L444"> },</span>
<span class="line" id="L445"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L446"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L447"> },</span>
<span class="line" id="L448"> }</span>
<span class="line" id="L449"> },</span>
<span class="line" id="L450"> .grayscale =&gt; {</span>
<span class="line" id="L451"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L452"> .grayscale16 =&gt; {</span>
<span class="line" id="L453"> <span class="tok-kw">const</span> pixels_len = pixels.len();</span>
<span class="line" id="L454"> <span class="tok-kw">for</span> (pixels.grayscale16, <span class="tok-number">0</span>..) |entry, index| {</span>
<span class="line" id="L455"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;{}&quot;</span>, .{entry.value});</span>
<span class="line" id="L456"></span>
<span class="line" id="L457"> <span class="tok-kw">if</span> (index != (pixels_len - <span class="tok-number">1</span>)) {</span>
<span class="line" id="L458"> _ = <span class="tok-kw">try</span> writer.write(<span class="tok-str">&quot; &quot;</span>);</span>
<span class="line" id="L459"> }</span>
<span class="line" id="L460"> }</span>
<span class="line" id="L461"> _ = <span class="tok-kw">try</span> writer.write(<span class="tok-str">&quot;\n&quot;</span>);</span>
<span class="line" id="L462"> },</span>
<span class="line" id="L463"> .grayscale8 =&gt; {</span>
<span class="line" id="L464"> <span class="tok-kw">const</span> pixels_len = pixels.len();</span>
<span class="line" id="L465"> <span class="tok-kw">for</span> (pixels.grayscale8, <span class="tok-number">0</span>..) |entry, index| {</span>
<span class="line" id="L466"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;{}&quot;</span>, .{entry.value});</span>
<span class="line" id="L467"></span>
<span class="line" id="L468"> <span class="tok-kw">if</span> (index != (pixels_len - <span class="tok-number">1</span>)) {</span>
<span class="line" id="L469"> _ = <span class="tok-kw">try</span> writer.write(<span class="tok-str">&quot; &quot;</span>);</span>
<span class="line" id="L470"> }</span>
<span class="line" id="L471"> }</span>
<span class="line" id="L472"> _ = <span class="tok-kw">try</span> writer.write(<span class="tok-str">&quot;\n&quot;</span>);</span>
<span class="line" id="L473"> },</span>
<span class="line" id="L474"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L475"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L476"> },</span>
<span class="line" id="L477"> }</span>
<span class="line" id="L478"> },</span>
<span class="line" id="L479"> .rgb =&gt; {</span>
<span class="line" id="L480"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L481"> .rgb24 =&gt; {</span>
<span class="line" id="L482"> <span class="tok-kw">for</span> (pixels.rgb24) |entry| {</span>
<span class="line" id="L483"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;{} {} {}\n&quot;</span>, .{ entry.r, entry.g, entry.b });</span>
<span class="line" id="L484"> }</span>
<span class="line" id="L485"> },</span>
<span class="line" id="L486"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L487"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L488"> },</span>
<span class="line" id="L489"> }</span>
<span class="line" id="L490"> },</span>
<span class="line" id="L491"> }</span>
<span class="line" id="L492"> }</span>
<span class="line" id="L493"></span>
<span class="line" id="L494"> <span class="tok-kw">try</span> buffered_stream.flush();</span>
<span class="line" id="L495"> }</span>
<span class="line" id="L496"> };</span>
<span class="line" id="L497">}</span>
<span class="line" id="L498"></span>
<span class="line" id="L499"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PBM = Netpbm(Image.Format.pbm, &amp;[_]<span class="tok-type">u8</span>{ <span class="tok-str">'1'</span>, <span class="tok-str">'4'</span> });</span>
<span class="line" id="L500"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PGM = Netpbm(Image.Format.pgm, &amp;[_]<span class="tok-type">u8</span>{ <span class="tok-str">'2'</span>, <span class="tok-str">'5'</span> });</span>
<span class="line" id="L501"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PPM = Netpbm(Image.Format.ppm, &amp;[_]<span class="tok-type">u8</span>{ <span class="tok-str">'3'</span>, <span class="tok-str">'6'</span> });</span>
<span class="line" id="L502"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> io = std.io;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> mem = std.mem;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> math = std.math;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> ascii = std.ascii;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> fmt = std.fmt;</span>
<span class="line" id="L7"><span class="tok-kw">const</span> meta = std.meta;</span>
<span class="line" id="L8"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L11"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L12"><span class="tok-kw">const</span> PixelStorage = color.PixelStorage;</span>
<span class="line" id="L13"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L14"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L15"><span class="tok-kw">const</span> ImageError = Image.Error;</span>
<span class="line" id="L16"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L17"><span class="tok-kw">const</span> ImageWriteError = Image.WriteError;</span>
<span class="line" id="L18"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../utils.zig&quot;</span>);</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-comment">/// Represents all supported values for `TUPLTYPE`.</span></span>
<span class="line" id="L21"><span class="tok-kw">const</span> TupleType = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L22"> mono,</span>
<span class="line" id="L23"> mono_a,</span>
<span class="line" id="L24"> gray,</span>
<span class="line" id="L25"> gray_a,</span>
<span class="line" id="L26"> rgb,</span>
<span class="line" id="L27"> rgb_a,</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"> <span class="tok-comment">/// Returns the `TupleType` corresponding to `string`, or</span></span>
<span class="line" id="L30"> <span class="tok-comment">/// `error.Unsupported` if it is unknown.</span></span>
<span class="line" id="L31"> <span class="tok-kw">fn</span> <span class="tok-fn">fromString</span>(string: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-kw">error</span>{Unsupported}!TupleType {</span>
<span class="line" id="L32"> <span class="tok-comment">// zig fmt: off</span>
</span>
<span class="line" id="L33"> <span class="tok-kw">return</span> <span class="tok-kw">if</span>(mem.eql(<span class="tok-type">u8</span>, string, <span class="tok-str">&quot;BLACKANDWHITE&quot;</span>)) .mono</span>
<span class="line" id="L34"> <span class="tok-kw">else</span> <span class="tok-kw">if</span>(mem.eql(<span class="tok-type">u8</span>, string, <span class="tok-str">&quot;BLACKANDWHITE_ALPHA&quot;</span>)) .mono_a</span>
<span class="line" id="L35"> <span class="tok-kw">else</span> <span class="tok-kw">if</span>(mem.eql(<span class="tok-type">u8</span>, string, <span class="tok-str">&quot;GRAYSCALE&quot;</span>)) .gray</span>
<span class="line" id="L36"> <span class="tok-kw">else</span> <span class="tok-kw">if</span>(mem.eql(<span class="tok-type">u8</span>, string, <span class="tok-str">&quot;GRAYSCALE_ALPHA&quot;</span>)) .gray_a</span>
<span class="line" id="L37"> <span class="tok-kw">else</span> <span class="tok-kw">if</span>(mem.eql(<span class="tok-type">u8</span>, string, <span class="tok-str">&quot;RGB&quot;</span>)) .rgb</span>
<span class="line" id="L38"> <span class="tok-kw">else</span> <span class="tok-kw">if</span>(mem.eql(<span class="tok-type">u8</span>, string, <span class="tok-str">&quot;RGB_ALPHA&quot;</span>)) .rgb_a</span>
<span class="line" id="L39"> <span class="tok-kw">else</span> <span class="tok-kw">error</span>.Unsupported; <span class="tok-comment">// Unknown tuple type</span>
</span>
<span class="line" id="L40"> <span class="tok-comment">// zig fmt: on</span>
</span>
<span class="line" id="L41"> }</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"> <span class="tok-comment">/// Returns the `TUPLTYPE` string representation of `tuple_type`.</span></span>
<span class="line" id="L44"> <span class="tok-kw">fn</span> <span class="tok-fn">toString</span>(tuple_type: TupleType) []<span class="tok-kw">const</span> <span class="tok-type">u8</span> {</span>
<span class="line" id="L45"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (tuple_type) {</span>
<span class="line" id="L46"> .mono =&gt; <span class="tok-str">&quot;BLACKANDWHITE&quot;</span>,</span>
<span class="line" id="L47"> .mono_a =&gt; <span class="tok-str">&quot;BLACKANDWHITE_ALPHA&quot;</span>,</span>
<span class="line" id="L48"> .gray =&gt; <span class="tok-str">&quot;GRAYSCALE&quot;</span>,</span>
<span class="line" id="L49"> .gray_a =&gt; <span class="tok-str">&quot;GRAYSCALE_ALPHA&quot;</span>,</span>
<span class="line" id="L50"> .rgb =&gt; <span class="tok-str">&quot;RGB&quot;</span>,</span>
<span class="line" id="L51"> .rgb_a =&gt; <span class="tok-str">&quot;RGB_ALPHA&quot;</span>,</span>
<span class="line" id="L52"> };</span>
<span class="line" id="L53"> }</span>
<span class="line" id="L54">};</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"><span class="tok-comment">/// Represents a PAM header.</span></span>
<span class="line" id="L57"><span class="tok-kw">const</span> Header = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L58"> <span class="tok-comment">/// Number of pixels in a row.</span></span>
<span class="line" id="L59"> width: <span class="tok-type">usize</span>,</span>
<span class="line" id="L60"> <span class="tok-comment">/// Number of rows.</span></span>
<span class="line" id="L61"> height: <span class="tok-type">usize</span>,</span>
<span class="line" id="L62"> <span class="tok-comment">/// Number of components per pixels.</span></span>
<span class="line" id="L63"> depth: <span class="tok-type">usize</span>,</span>
<span class="line" id="L64"> <span class="tok-comment">/// Maximum value of a component.</span></span>
<span class="line" id="L65"> maxval: <span class="tok-type">u16</span>,</span>
<span class="line" id="L66"> <span class="tok-comment">/// Tuple type of the image.</span></span>
<span class="line" id="L67"> tuple_type: TupleType,</span>
<span class="line" id="L68"> <span class="tok-comment">/// Arbitrary text comments. Note that comment position inside the</span></span>
<span class="line" id="L69"> <span class="tok-comment">/// header is not preserved.</span></span>
<span class="line" id="L70"> comments: []<span class="tok-kw">const</span> []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L71"></span>
<span class="line" id="L72"> <span class="tok-comment">/// Reads a header from `reader`, using `allocator` to allocate</span></span>
<span class="line" id="L73"> <span class="tok-comment">/// memory. Returns that header, `error.Unsupported` if the tuple</span></span>
<span class="line" id="L74"> <span class="tok-comment">/// type is not known to us, `error.OutOfMemory` if allocation</span></span>
<span class="line" id="L75"> <span class="tok-comment">/// fails, `error.InvalidData` if the header does not conform to</span></span>
<span class="line" id="L76"> <span class="tok-comment">/// the PAM specification, or another error specific to `reader`</span></span>
<span class="line" id="L77"> <span class="tok-comment">/// if reading fails.</span></span>
<span class="line" id="L78"> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(allocator: Allocator, reader: <span class="tok-kw">anytype</span>) (<span class="tok-kw">error</span>{ InvalidData, Unsupported, OutOfMemory, EndOfStream, StreamTooLong } || <span class="tok-builtin">@TypeOf</span>(reader).Error)!Header {</span>
<span class="line" id="L79"> <span class="tok-kw">var</span> maybe_width: ?<span class="tok-type">usize</span> = <span class="tok-null">null</span>;</span>
<span class="line" id="L80"> <span class="tok-kw">var</span> maybe_height: ?<span class="tok-type">usize</span> = <span class="tok-null">null</span>;</span>
<span class="line" id="L81"> <span class="tok-kw">var</span> maybe_depth: ?<span class="tok-type">usize</span> = <span class="tok-null">null</span>;</span>
<span class="line" id="L82"> <span class="tok-kw">var</span> maybe_maxval: ?<span class="tok-type">u16</span> = <span class="tok-null">null</span>;</span>
<span class="line" id="L83"> <span class="tok-kw">var</span> maybe_tuple_type: ?TupleType = <span class="tok-null">null</span>;</span>
<span class="line" id="L84"> <span class="tok-kw">var</span> comments = std.ArrayListUnmanaged([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>){};</span>
<span class="line" id="L85"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L86"> <span class="tok-kw">for</span> (comments.items) |comment| allocator.free(comment);</span>
<span class="line" id="L87"> comments.deinit(allocator);</span>
<span class="line" id="L88"> }</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> {</span>
<span class="line" id="L91"> <span class="tok-kw">var</span> buf = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u8</span>).initCapacity(allocator, <span class="tok-number">32</span>);</span>
<span class="line" id="L92"> <span class="tok-kw">defer</span> buf.deinit();</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L95"> <span class="tok-comment">// we fail on EOS here because a valid pam header must end with ENDHDR</span>
</span>
<span class="line" id="L96"> <span class="tok-kw">try</span> reader.readUntilDelimiterArrayList(&amp;buf, <span class="tok-str">'\n'</span>, math.maxInt(<span class="tok-type">usize</span>));</span>
<span class="line" id="L97"> <span class="tok-kw">const</span> line = buf.items; <span class="tok-comment">// empty lines are meaningless</span>
</span>
<span class="line" id="L98"> <span class="tok-kw">if</span> (line.len == <span class="tok-number">0</span>) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L99"> <span class="tok-kw">if</span> (line[<span class="tok-number">0</span>] == <span class="tok-str">'#'</span>) { <span class="tok-comment">// comment</span>
</span>
<span class="line" id="L100"> <span class="tok-kw">try</span> comments.append(allocator, <span class="tok-kw">try</span> allocator.dupe(<span class="tok-type">u8</span>, line[<span class="tok-number">1</span>..]));</span>
<span class="line" id="L101"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103"></span>
<span class="line" id="L104"> <span class="tok-kw">var</span> tok_iter = mem.tokenize(<span class="tok-type">u8</span>, line, &amp;ascii.whitespace);</span>
<span class="line" id="L105"> <span class="tok-kw">const</span> first_token = tok_iter.next() <span class="tok-kw">orelse</span> <span class="tok-kw">continue</span>; <span class="tok-comment">// lines with 0 tokens are meaningless</span>
</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"> <span class="tok-kw">if</span> (first_token.len &gt; <span class="tok-number">8</span>) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// the first token must be at most 8 bytes</span>
</span>
<span class="line" id="L108"></span>
<span class="line" id="L109"> <span class="tok-kw">if</span> (mem.eql(<span class="tok-type">u8</span>, first_token, <span class="tok-str">&quot;ENDHDR&quot;</span>)) <span class="tok-kw">break</span>;</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"> <span class="tok-kw">if</span> (mem.eql(<span class="tok-type">u8</span>, first_token, <span class="tok-str">&quot;TUPLTYPE&quot;</span>)) {</span>
<span class="line" id="L112"> maybe_tuple_type = <span class="tok-kw">try</span> TupleType.fromString(tok_iter.rest());</span>
<span class="line" id="L113"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L114"> }</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"> <span class="tok-kw">const</span> second_token = tok_iter.next() <span class="tok-kw">orelse</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// bad token</span>
</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"> <span class="tok-kw">if</span> (mem.eql(<span class="tok-type">u8</span>, first_token, <span class="tok-str">&quot;WIDTH&quot;</span>)) {</span>
<span class="line" id="L119"> maybe_width = fmt.parseUnsigned(<span class="tok-type">usize</span>, second_token, <span class="tok-number">10</span>) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// bad width</span>
</span>
<span class="line" id="L120"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (mem.eql(<span class="tok-type">u8</span>, first_token, <span class="tok-str">&quot;HEIGHT&quot;</span>)) {</span>
<span class="line" id="L121"> maybe_height = fmt.parseUnsigned(<span class="tok-type">usize</span>, second_token, <span class="tok-number">10</span>) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// bad height</span>
</span>
<span class="line" id="L122"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (mem.eql(<span class="tok-type">u8</span>, first_token, <span class="tok-str">&quot;DEPTH&quot;</span>)) {</span>
<span class="line" id="L123"> maybe_depth = fmt.parseUnsigned(<span class="tok-type">usize</span>, second_token, <span class="tok-number">10</span>) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// bad depth</span>
</span>
<span class="line" id="L124"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (mem.eql(<span class="tok-type">u8</span>, first_token, <span class="tok-str">&quot;MAXVAL&quot;</span>)) {</span>
<span class="line" id="L125"> maybe_maxval = fmt.parseUnsigned(<span class="tok-type">u16</span>, second_token, <span class="tok-number">10</span>) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// bad maxval</span>
</span>
<span class="line" id="L126"> } <span class="tok-kw">else</span> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// invalid first token</span>
</span>
<span class="line" id="L127"> }</span>
<span class="line" id="L128"> }</span>
<span class="line" id="L129"></span>
<span class="line" id="L130"> <span class="tok-kw">if</span> (maybe_height == <span class="tok-null">null</span> <span class="tok-kw">or</span> maybe_width == <span class="tok-null">null</span> <span class="tok-kw">or</span> maybe_maxval == <span class="tok-null">null</span> <span class="tok-kw">or</span> maybe_depth == <span class="tok-null">null</span>) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// missing values</span>
</span>
<span class="line" id="L131"> <span class="tok-kw">if</span> (maybe_height.? &lt; <span class="tok-number">1</span> <span class="tok-kw">or</span> maybe_width.? &lt; <span class="tok-number">1</span> <span class="tok-kw">or</span> maybe_maxval.? &lt; <span class="tok-number">1</span>) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// bad width, height, or maxval</span>
</span>
<span class="line" id="L132"> <span class="tok-kw">if</span> (maybe_tuple_type == <span class="tok-null">null</span>) { <span class="tok-comment">// guess tuple type</span>
</span>
<span class="line" id="L133"> <span class="tok-kw">const</span> depth = maybe_depth.?;</span>
<span class="line" id="L134"> <span class="tok-kw">const</span> maxval = maybe_maxval.?;</span>
<span class="line" id="L135"> maybe_tuple_type = <span class="tok-kw">switch</span> (depth) {</span>
<span class="line" id="L136"> <span class="tok-number">1</span> =&gt; <span class="tok-kw">if</span> (maxval == <span class="tok-number">1</span>) TupleType.mono <span class="tok-kw">else</span> TupleType.gray,</span>
<span class="line" id="L137"> <span class="tok-number">2</span> =&gt; <span class="tok-kw">if</span> (maxval == <span class="tok-number">1</span>) TupleType.mono_a <span class="tok-kw">else</span> TupleType.gray_a,</span>
<span class="line" id="L138"> <span class="tok-number">3</span> =&gt; TupleType.rgb,</span>
<span class="line" id="L139"> <span class="tok-number">4</span> =&gt; TupleType.rgb_a,</span>
<span class="line" id="L140"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported, <span class="tok-comment">// can't guess tuple type</span>
</span>
<span class="line" id="L141"> };</span>
<span class="line" id="L142"> }</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> <span class="tok-kw">const</span> tuple_type_matches = <span class="tok-kw">if</span> (maybe_depth) |depth| <span class="tok-kw">if</span> (maybe_maxval) |maxval| <span class="tok-kw">switch</span> (maybe_tuple_type.?) {</span>
<span class="line" id="L145"> .mono =&gt; depth == <span class="tok-number">1</span> <span class="tok-kw">and</span> maxval == <span class="tok-number">1</span>,</span>
<span class="line" id="L146"> .mono_a =&gt; depth == <span class="tok-number">2</span> <span class="tok-kw">and</span> maxval == <span class="tok-number">1</span>,</span>
<span class="line" id="L147"> .gray =&gt; depth == <span class="tok-number">1</span>,</span>
<span class="line" id="L148"> .gray_a =&gt; depth == <span class="tok-number">2</span>,</span>
<span class="line" id="L149"> .rgb =&gt; depth == <span class="tok-number">3</span>,</span>
<span class="line" id="L150"> .rgb_a =&gt; depth == <span class="tok-number">4</span>,</span>
<span class="line" id="L151"> } <span class="tok-kw">else</span> <span class="tok-kw">unreachable</span> <span class="tok-kw">else</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"> <span class="tok-kw">if</span> (!tuple_type_matches) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// tuple type does not match</span>
</span>
<span class="line" id="L154"></span>
<span class="line" id="L155"> <span class="tok-kw">return</span> Header{</span>
<span class="line" id="L156"> .width = maybe_width.?,</span>
<span class="line" id="L157"> .height = maybe_height.?,</span>
<span class="line" id="L158"> .maxval = maybe_maxval.?,</span>
<span class="line" id="L159"> .depth = maybe_depth.?,</span>
<span class="line" id="L160"> .tuple_type = maybe_tuple_type.?,</span>
<span class="line" id="L161"> .comments = <span class="tok-kw">try</span> comments.toOwnedSlice(allocator),</span>
<span class="line" id="L162"> };</span>
<span class="line" id="L163"> }</span>
<span class="line" id="L164"></span>
<span class="line" id="L165"> <span class="tok-comment">/// Writes the PAM representation of `header` to `writer`. If</span></span>
<span class="line" id="L166"> <span class="tok-comment">/// writing fails, returns an error specific to `writer`.</span></span>
<span class="line" id="L167"> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(header: Header, writer: <span class="tok-kw">anytype</span>) <span class="tok-builtin">@TypeOf</span>(writer).Error!<span class="tok-type">void</span> {</span>
<span class="line" id="L168"> <span class="tok-kw">try</span> writer.writeAll(<span class="tok-str">&quot;P7\n&quot;</span>);</span>
<span class="line" id="L169"></span>
<span class="line" id="L170"> <span class="tok-kw">for</span> (header.comments) |comment|</span>
<span class="line" id="L171"> <span class="tok-kw">try</span> writer.print(<span class="tok-str">&quot;#{s}\n&quot;</span>, .{comment});</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"> <span class="tok-kw">const</span> fmtstr =</span>
<span class="line" id="L174"> <span class="tok-str">\\WIDTH {d}</span></span>
<span class="line" id="L175"> <span class="tok-str">\\HEIGHT {d}</span></span>
<span class="line" id="L176"> <span class="tok-str">\\DEPTH {d}</span></span>
<span class="line" id="L177"> <span class="tok-str">\\MAXVAL {d}</span></span>
<span class="line" id="L178"> <span class="tok-str">\\TUPLTYPE {s}</span></span>
<span class="line" id="L179"> <span class="tok-str">\\ENDHDR</span></span>
<span class="line" id="L180"> <span class="tok-str">\\</span></span>
<span class="line" id="L181"> ;</span>
<span class="line" id="L182"> <span class="tok-kw">try</span> writer.print(fmtstr, .{ header.width, header.height, header.depth, header.maxval, header.tuple_type.toString() });</span>
<span class="line" id="L183"> }</span>
<span class="line" id="L184"></span>
<span class="line" id="L185"> <span class="tok-comment">/// Invalidates `header` and frees all comments with `allocator`.</span></span>
<span class="line" id="L186"> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(header: *Header, allocator: Allocator) <span class="tok-type">void</span> {</span>
<span class="line" id="L187"> <span class="tok-kw">for</span> (header.comments) |comment| {</span>
<span class="line" id="L188"> allocator.free(comment);</span>
<span class="line" id="L189"> }</span>
<span class="line" id="L190"> allocator.free(header.comments);</span>
<span class="line" id="L191"> header.* = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L192"> }</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"> <span class="tok-kw">fn</span> <span class="tok-fn">hasTwoBytesPerComponent</span>(header: Header) <span class="tok-type">bool</span> {</span>
<span class="line" id="L195"> <span class="tok-kw">return</span> header.maxval &gt; math.maxInt(<span class="tok-type">u8</span>);</span>
<span class="line" id="L196"> }</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">fn</span> <span class="tok-fn">getPixelFormat</span>(header: Header) PixelFormat {</span>
<span class="line" id="L199"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (header.tuple_type) {</span>
<span class="line" id="L200"> .mono =&gt; .grayscale1,</span>
<span class="line" id="L201"> <span class="tok-comment">// TODO: is this conversion acceptable?</span>
</span>
<span class="line" id="L202"> .mono_a =&gt; .grayscale1,</span>
<span class="line" id="L203"> .gray =&gt; <span class="tok-kw">if</span> (header.hasTwoBytesPerComponent()) .grayscale16 <span class="tok-kw">else</span> .grayscale8,</span>
<span class="line" id="L204"> .gray_a =&gt; <span class="tok-kw">if</span> (header.hasTwoBytesPerComponent()) .grayscale16Alpha <span class="tok-kw">else</span> .grayscale8Alpha,</span>
<span class="line" id="L205"> .rgb =&gt; <span class="tok-kw">if</span> (header.hasTwoBytesPerComponent()) .rgb48 <span class="tok-kw">else</span> .rgb24,</span>
<span class="line" id="L206"> .rgb_a =&gt; <span class="tok-kw">if</span> (header.hasTwoBytesPerComponent()) .rgba64 <span class="tok-kw">else</span> .rgba32,</span>
<span class="line" id="L207"> };</span>
<span class="line" id="L208"> }</span>
<span class="line" id="L209"></span>
<span class="line" id="L210"> <span class="tok-comment">/// Initializes an `Image` with the values that `header`</span></span>
<span class="line" id="L211"> <span class="tok-comment">/// contains. Returns `error.OutOfMemory` if allocation fails.</span></span>
<span class="line" id="L212"> <span class="tok-kw">fn</span> <span class="tok-fn">initImage</span>(header: Header, allocator: Allocator) <span class="tok-kw">error</span>{OutOfMemory}!Image {</span>
<span class="line" id="L213"> <span class="tok-kw">var</span> image = Image.init(allocator);</span>
<span class="line" id="L214"> image.width = header.width;</span>
<span class="line" id="L215"> image.height = header.height;</span>
<span class="line" id="L216"> image.pixels = <span class="tok-kw">try</span> PixelStorage.init(allocator, header.getPixelFormat(), header.width * header.height);</span>
<span class="line" id="L217"> <span class="tok-kw">return</span> image;</span>
<span class="line" id="L218"> }</span>
<span class="line" id="L219"></span>
<span class="line" id="L220"> <span class="tok-comment">/// Initializes a `Header` from `image`. Returns</span></span>
<span class="line" id="L221"> <span class="tok-comment">/// `error.Unsupported` if the pixel format of `image` cannot be</span></span>
<span class="line" id="L222"> <span class="tok-comment">/// easily represented in PAM.</span></span>
<span class="line" id="L223"> <span class="tok-kw">fn</span> <span class="tok-fn">fromImage</span>(image: Image) <span class="tok-kw">error</span>{Unsupported}!Header {</span>
<span class="line" id="L224"> <span class="tok-kw">var</span> header: Header = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L225"> <span class="tok-kw">switch</span> (image.pixelFormat()) {</span>
<span class="line" id="L226"> .invalid,</span>
<span class="line" id="L227"> .indexed1,</span>
<span class="line" id="L228"> .indexed2,</span>
<span class="line" id="L229"> .indexed4,</span>
<span class="line" id="L230"> .indexed8,</span>
<span class="line" id="L231"> .indexed16,</span>
<span class="line" id="L232"> .float32,</span>
<span class="line" id="L233"> .rgb565,</span>
<span class="line" id="L234"> =&gt; <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported, <span class="tok-comment">// unsupported pixel format</span>
</span>
<span class="line" id="L235"></span>
<span class="line" id="L236"> .grayscale1 =&gt; {</span>
<span class="line" id="L237"> header.depth = <span class="tok-number">1</span>;</span>
<span class="line" id="L238"> header.maxval = <span class="tok-number">1</span>;</span>
<span class="line" id="L239"> header.tuple_type = .mono;</span>
<span class="line" id="L240"> },</span>
<span class="line" id="L241"> .grayscale2 =&gt; {</span>
<span class="line" id="L242"> header.depth = <span class="tok-number">1</span>;</span>
<span class="line" id="L243"> header.maxval = math.maxInt(<span class="tok-type">u2</span>);</span>
<span class="line" id="L244"> header.tuple_type = .gray;</span>
<span class="line" id="L245"> },</span>
<span class="line" id="L246"> .grayscale4 =&gt; {</span>
<span class="line" id="L247"> header.depth = <span class="tok-number">1</span>;</span>
<span class="line" id="L248"> header.maxval = math.maxInt(<span class="tok-type">u4</span>);</span>
<span class="line" id="L249"> header.tuple_type = .gray;</span>
<span class="line" id="L250"> },</span>
<span class="line" id="L251"> .grayscale8 =&gt; {</span>
<span class="line" id="L252"> header.depth = <span class="tok-number">1</span>;</span>
<span class="line" id="L253"> header.maxval = math.maxInt(<span class="tok-type">u8</span>);</span>
<span class="line" id="L254"> header.tuple_type = .gray;</span>
<span class="line" id="L255"> },</span>
<span class="line" id="L256"> .grayscale8Alpha =&gt; {</span>
<span class="line" id="L257"> header.depth = <span class="tok-number">2</span>;</span>
<span class="line" id="L258"> header.maxval = math.maxInt(<span class="tok-type">u8</span>);</span>
<span class="line" id="L259"> header.tuple_type = .gray_a;</span>
<span class="line" id="L260"> },</span>
<span class="line" id="L261"> .grayscale16 =&gt; {</span>
<span class="line" id="L262"> header.depth = <span class="tok-number">1</span>;</span>
<span class="line" id="L263"> header.maxval = math.maxInt(<span class="tok-type">u16</span>);</span>
<span class="line" id="L264"> header.tuple_type = .gray;</span>
<span class="line" id="L265"> },</span>
<span class="line" id="L266"> .grayscale16Alpha =&gt; {</span>
<span class="line" id="L267"> header.depth = <span class="tok-number">2</span>;</span>
<span class="line" id="L268"> header.maxval = math.maxInt(<span class="tok-type">u16</span>);</span>
<span class="line" id="L269"> header.tuple_type = .gray_a;</span>
<span class="line" id="L270"> },</span>
<span class="line" id="L271"> .rgb555, .bgr555 =&gt; {</span>
<span class="line" id="L272"> header.depth = <span class="tok-number">3</span>;</span>
<span class="line" id="L273"> header.maxval = math.maxInt(<span class="tok-type">u5</span>);</span>
<span class="line" id="L274"> header.tuple_type = .rgb;</span>
<span class="line" id="L275"> },</span>
<span class="line" id="L276"> .rgb24, .bgr24 =&gt; {</span>
<span class="line" id="L277"> header.depth = <span class="tok-number">3</span>;</span>
<span class="line" id="L278"> header.maxval = math.maxInt(<span class="tok-type">u8</span>);</span>
<span class="line" id="L279"> header.tuple_type = .rgb;</span>
<span class="line" id="L280"> },</span>
<span class="line" id="L281"> .rgba32, .bgra32 =&gt; {</span>
<span class="line" id="L282"> header.depth = <span class="tok-number">4</span>;</span>
<span class="line" id="L283"> header.maxval = math.maxInt(<span class="tok-type">u8</span>);</span>
<span class="line" id="L284"> header.tuple_type = .rgb_a;</span>
<span class="line" id="L285"> },</span>
<span class="line" id="L286"> .rgb48 =&gt; {</span>
<span class="line" id="L287"> header.depth = <span class="tok-number">3</span>;</span>
<span class="line" id="L288"> header.maxval = math.maxInt(<span class="tok-type">u16</span>);</span>
<span class="line" id="L289"> header.tuple_type = .rgb;</span>
<span class="line" id="L290"> },</span>
<span class="line" id="L291"> .rgba64 =&gt; {</span>
<span class="line" id="L292"> header.depth = <span class="tok-number">4</span>;</span>
<span class="line" id="L293"> header.maxval = math.maxInt(<span class="tok-type">u16</span>);</span>
<span class="line" id="L294"> header.tuple_type = .rgb_a;</span>
<span class="line" id="L295"> },</span>
<span class="line" id="L296"> }</span>
<span class="line" id="L297"> header.comments = &amp;.{};</span>
<span class="line" id="L298"> header.width = image.width;</span>
<span class="line" id="L299"> header.height = image.height;</span>
<span class="line" id="L300"> <span class="tok-kw">return</span> header;</span>
<span class="line" id="L301"> }</span>
<span class="line" id="L302">};</span>
<span class="line" id="L303"></span>
<span class="line" id="L304"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PAM = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L305"> <span class="tok-comment">//! Portable AnyMap</span></span>
<span class="line" id="L306"> <span class="tok-comment">//! currently, this only supports a subset of PAMs where:</span></span>
<span class="line" id="L307"> <span class="tok-comment">//! - the tuple type is official (see `man 5 pam`) or easily inferred (and</span></span>
<span class="line" id="L308"> <span class="tok-comment">//! by extension, depth is 4 or less)</span></span>
<span class="line" id="L309"> <span class="tok-comment">//! - all images in a sequence have the same dimensions and maxval (it is</span></span>
<span class="line" id="L310"> <span class="tok-comment">//! technically possible to support animations with different maxvals and</span></span>
<span class="line" id="L311"> <span class="tok-comment">//! tuple types as each `AnimationFrame` has its own `PixelStorage`, however,</span></span>
<span class="line" id="L312"> <span class="tok-comment">//! this is likely not expected by users of the library.</span></span>
<span class="line" id="L313"> <span class="tok-comment">//! supported input pixel formats: `grayscale{1, 8, 16}, `grayscale{1, 8, 16}Alpha`, `rgb555`, `{rgb, bgr}{24, 48}`, `{bgr, rgb}a{32, 64}`</span></span>
<span class="line" id="L314"></span>
<span class="line" id="L315"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L316"> <span class="tok-comment">/// Free-form comments to be added to the header.</span></span>
<span class="line" id="L317"> comments: []<span class="tok-kw">const</span> []<span class="tok-kw">const</span> <span class="tok-type">u8</span> = &amp;.{},</span>
<span class="line" id="L318"> <span class="tok-comment">/// Whether to add the duration of each `Image.AnimationFrame`</span></span>
<span class="line" id="L319"> <span class="tok-comment">/// and the `loop_count` of `Image.Animation` to the written file as a comment.</span></span>
<span class="line" id="L320"> add_duration_as_comment: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L321"> };</span>
<span class="line" id="L322"></span>
<span class="line" id="L323"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L324"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L325"> .format = format,</span>
<span class="line" id="L326"> .formatDetect = formatDetect,</span>
<span class="line" id="L327"> .readImage = readImage,</span>
<span class="line" id="L328"> .writeImage = writeImage,</span>
<span class="line" id="L329"> };</span>
<span class="line" id="L330"> }</span>
<span class="line" id="L331"></span>
<span class="line" id="L332"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L333"> <span class="tok-kw">return</span> Image.Format.pam;</span>
<span class="line" id="L334"> }</span>
<span class="line" id="L335"></span>
<span class="line" id="L336"> <span class="tok-comment">/// Returns `true` if the image will be able to be decoded, or a</span></span>
<span class="line" id="L337"> <span class="tok-comment">/// `stream`-specific error if reading fails.</span></span>
<span class="line" id="L338"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) ImageReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L339"> <span class="tok-kw">const</span> magic = <span class="tok-kw">try</span> stream.reader().readBytesNoEof(<span class="tok-number">3</span>);</span>
<span class="line" id="L340"> <span class="tok-kw">return</span> mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P7\n&quot;</span>); <span class="tok-comment">// no possibility of misdetecting xv thumbnails (magic &quot;P7 332&quot;)</span>
</span>
<span class="line" id="L341"> }</span>
<span class="line" id="L342"></span>
<span class="line" id="L343"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: Allocator, stream: *Image.Stream) ImageReadError!Image {</span>
<span class="line" id="L344"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L345"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L346"> <span class="tok-kw">var</span> image: Image = <span class="tok-kw">try</span> readFrame(allocator, reader) <span class="tok-kw">orelse</span> <span class="tok-kw">return</span> ImageReadError.InvalidData; <span class="tok-comment">// empty stream</span>
</span>
<span class="line" id="L347"> <span class="tok-kw">errdefer</span> image.deinit();</span>
<span class="line" id="L348"></span>
<span class="line" id="L349"> <span class="tok-kw">while</span> (<span class="tok-kw">try</span> readFrame(allocator, reader)) |frame| {</span>
<span class="line" id="L350"> <span class="tok-kw">if</span> (frame.width != image.width <span class="tok-kw">or</span> frame.height != image.height <span class="tok-kw">or</span> meta.activeTag(frame.pixels) != meta.activeTag(image.pixels)) {</span>
<span class="line" id="L351"> <span class="tok-kw">return</span> ImageReadError.Unsupported; <span class="tok-comment">// no obvious way to have multiple frames with different dimensions</span>
</span>
<span class="line" id="L352"> }</span>
<span class="line" id="L353"> <span class="tok-kw">try</span> image.animation.frames.append(allocator, Image.AnimationFrame{ .pixels = frame.pixels, .duration = <span class="tok-number">0</span> });</span>
<span class="line" id="L354"> }</span>
<span class="line" id="L355"> <span class="tok-kw">return</span> image;</span>
<span class="line" id="L356"> }</span>
<span class="line" id="L357"></span>
<span class="line" id="L358"> <span class="tok-comment">/// Linearly maps `val` from [0..`src_maxval`] to</span></span>
<span class="line" id="L359"> <span class="tok-comment">/// [0..`dst_maxval`]. If `val` is greater than `src_maxval`,</span></span>
<span class="line" id="L360"> <span class="tok-comment">/// `error.OutOfBounds` is returned. If `val == src_maxval`,</span></span>
<span class="line" id="L361"> <span class="tok-comment">/// `dst_maxval` is returned.</span></span>
<span class="line" id="L362"> <span class="tok-kw">fn</span> <span class="tok-fn">mapValue</span>(<span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>, val: T, src_maxval: T, dst_maxval: T) <span class="tok-kw">error</span>{InvalidData}!T {</span>
<span class="line" id="L363"> <span class="tok-kw">if</span> (val &gt; src_maxval) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidData; <span class="tok-comment">// component value exceeded maxval</span>
</span>
<span class="line" id="L364"></span>
<span class="line" id="L365"> <span class="tok-kw">if</span> (src_maxval == dst_maxval) <span class="tok-kw">return</span> val;</span>
<span class="line" id="L366"></span>
<span class="line" id="L367"> <span class="tok-kw">const</span> W = meta.Int(.unsigned, <span class="tok-builtin">@bitSizeOf</span>(T) * <span class="tok-number">2</span>);</span>
<span class="line" id="L368"> <span class="tok-kw">return</span> <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@min</span>(math.maxInt(T), <span class="tok-builtin">@as</span>(W, dst_maxval) * <span class="tok-builtin">@as</span>(W, val) / <span class="tok-builtin">@as</span>(W, src_maxval)));</span>
<span class="line" id="L369"> }</span>
<span class="line" id="L370"></span>
<span class="line" id="L371"> <span class="tok-kw">fn</span> <span class="tok-fn">readFrame</span>(allocator: Allocator, reader: <span class="tok-kw">anytype</span>) ImageReadError!?Image {</span>
<span class="line" id="L372"> <span class="tok-comment">// we don't use catch switch here because error.EndOfStream</span>
</span>
<span class="line" id="L373"> <span class="tok-comment">// might be the only possible error (and would thus trigger a</span>
</span>
<span class="line" id="L374"> <span class="tok-comment">// compile error because of an unreachable else prong)</span>
</span>
<span class="line" id="L375"> <span class="tok-kw">const</span> magic = reader.readBytesNoEof(<span class="tok-number">3</span>) <span class="tok-kw">catch</span> |e| <span class="tok-kw">return</span> <span class="tok-kw">if</span> (e == <span class="tok-kw">error</span>.EndOfStream) <span class="tok-null">null</span> <span class="tok-kw">else</span> e;</span>
<span class="line" id="L376"> <span class="tok-kw">const</span> is_pam = mem.eql(<span class="tok-type">u8</span>, &amp;magic, <span class="tok-str">&quot;P7\n&quot;</span>);</span>
<span class="line" id="L377"> <span class="tok-kw">if</span> (!is_pam) <span class="tok-kw">return</span> ImageReadError.InvalidData; <span class="tok-comment">// invalid magic number or extraneous data at eof</span>
</span>
<span class="line" id="L378"></span>
<span class="line" id="L379"> <span class="tok-kw">var</span> header = <span class="tok-kw">try</span> Header.read(allocator, reader);</span>
<span class="line" id="L380"> <span class="tok-kw">defer</span> header.deinit(allocator);</span>
<span class="line" id="L381"></span>
<span class="line" id="L382"> <span class="tok-kw">var</span> image: Image = <span class="tok-kw">try</span> header.initImage(allocator);</span>
<span class="line" id="L383"> <span class="tok-kw">errdefer</span> image.deinit();</span>
<span class="line" id="L384"></span>
<span class="line" id="L385"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image.height) |row| {</span>
<span class="line" id="L386"> <span class="tok-kw">const</span> offset = row * image.width;</span>
<span class="line" id="L387"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image.width) |column| {</span>
<span class="line" id="L388"> <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L389"> .grayscale1 =&gt; |g| g[offset + column].value = <span class="tok-builtin">@intCast</span>(<span class="tok-kw">if</span> (header.tuple_type == .mono) <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-number">1</span>, <span class="tok-number">1</span>) <span class="tok-kw">else</span> <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-number">1</span>, <span class="tok-number">1</span>) &amp; <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-number">1</span>, <span class="tok-number">1</span>)),</span>
<span class="line" id="L390"> .grayscale8 =&gt; |g| g[offset + column].value = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L391"> .grayscale8Alpha =&gt; |g| g[offset + column] = .{</span>
<span class="line" id="L392"> .value = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L393"> .alpha = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L394"> },</span>
<span class="line" id="L395"> .grayscale16 =&gt; |g| g[offset + column].value = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L396"> .grayscale16Alpha =&gt; |g| g[offset + column] = .{</span>
<span class="line" id="L397"> .value = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L398"> .alpha = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L399"> },</span>
<span class="line" id="L400"> .rgb24 =&gt; |x| x[offset + column] = .{</span>
<span class="line" id="L401"> .r = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L402"> .g = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L403"> .b = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L404"> },</span>
<span class="line" id="L405"> .rgba32 =&gt; |x| x[offset + column] = .{</span>
<span class="line" id="L406"> .r = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L407"> .g = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L408"> .b = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L409"> .a = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u8</span>, <span class="tok-kw">try</span> reader.readByte(), <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@intCast</span>(header.maxval)), math.maxInt(<span class="tok-type">u8</span>)),</span>
<span class="line" id="L410"> },</span>
<span class="line" id="L411"> .rgb48 =&gt; |x| x[offset + column] = .{</span>
<span class="line" id="L412"> .r = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L413"> .g = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L414"> .b = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L415"> },</span>
<span class="line" id="L416"> .rgba64 =&gt; |x| x[offset + column] = .{</span>
<span class="line" id="L417"> .r = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L418"> .g = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L419"> .b = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L420"> .a = <span class="tok-kw">try</span> mapValue(<span class="tok-type">u16</span>, <span class="tok-kw">try</span> reader.readInt(<span class="tok-type">u16</span>, .little), header.maxval, math.maxInt(<span class="tok-type">u16</span>)),</span>
<span class="line" id="L421"> },</span>
<span class="line" id="L422"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L423"> }</span>
<span class="line" id="L424"> }</span>
<span class="line" id="L425"> }</span>
<span class="line" id="L426"> <span class="tok-kw">return</span> image;</span>
<span class="line" id="L427"> }</span>
<span class="line" id="L428"></span>
<span class="line" id="L429"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: Allocator, stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L430"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceWriter(stream);</span>
<span class="line" id="L431"> <span class="tok-kw">const</span> writer = buffered_stream.writer();</span>
<span class="line" id="L432"></span>
<span class="line" id="L433"> <span class="tok-kw">var</span> comments = std.ArrayList([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>).init(allocator);</span>
<span class="line" id="L434"> <span class="tok-kw">defer</span> comments.deinit();</span>
<span class="line" id="L435"> <span class="tok-kw">try</span> comments.appendSlice(<span class="tok-kw">switch</span> (encoder_options) {</span>
<span class="line" id="L436"> .pam =&gt; |p| p.comments,</span>
<span class="line" id="L437"> <span class="tok-kw">else</span> =&gt; &amp;.{},</span>
<span class="line" id="L438"> });</span>
<span class="line" id="L439"></span>
<span class="line" id="L440"> <span class="tok-kw">var</span> duration_buffer: [<span class="tok-number">128</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L441"> <span class="tok-kw">const</span> add_duration_as_comment = <span class="tok-kw">switch</span> (encoder_options) {</span>
<span class="line" id="L442"> .pam =&gt; |p| p.add_duration_as_comment,</span>
<span class="line" id="L443"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L444"> };</span>
<span class="line" id="L445"></span>
<span class="line" id="L446"> {</span>
<span class="line" id="L447"> <span class="tok-kw">if</span> (add_duration_as_comment <span class="tok-kw">and</span> image.isAnimation()) {</span>
<span class="line" id="L448"> <span class="tok-kw">try</span> comments.append(<span class="tok-kw">try</span> fmt.bufPrint(&amp;duration_buffer, <span class="tok-str">&quot;loop count: {d}&quot;</span>, .{image.animation.loop_count}));</span>
<span class="line" id="L449"> }</span>
<span class="line" id="L450"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L451"> <span class="tok-kw">if</span> (add_duration_as_comment <span class="tok-kw">and</span> image.isAnimation()) _ = comments.pop();</span>
<span class="line" id="L452"> }</span>
<span class="line" id="L453"></span>
<span class="line" id="L454"> <span class="tok-kw">try</span> writeFrame(writer, image, .{ .pam = .{ .comments = comments.items } });</span>
<span class="line" id="L455"> }</span>
<span class="line" id="L456"></span>
<span class="line" id="L457"> <span class="tok-kw">for</span> (image.animation.frames.items) |frame| {</span>
<span class="line" id="L458"> <span class="tok-kw">if</span> (add_duration_as_comment)</span>
<span class="line" id="L459"> <span class="tok-kw">try</span> comments.append(<span class="tok-kw">try</span> fmt.bufPrint(&amp;duration_buffer, <span class="tok-str">&quot;duration: {d}&quot;</span>, .{frame.duration}));</span>
<span class="line" id="L460"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L461"> <span class="tok-kw">if</span> (add_duration_as_comment) _ = comments.pop();</span>
<span class="line" id="L462"> }</span>
<span class="line" id="L463"></span>
<span class="line" id="L464"> <span class="tok-kw">const</span> frame_img = Image{ .pixels = frame.pixels, .width = image.width, .height = image.height, .allocator = image.allocator };</span>
<span class="line" id="L465"></span>
<span class="line" id="L466"> <span class="tok-kw">try</span> writeFrame(writer, frame_img, .{ .pam = .{ .comments = comments.items } });</span>
<span class="line" id="L467"> }</span>
<span class="line" id="L468"></span>
<span class="line" id="L469"> <span class="tok-kw">try</span> buffered_stream.flush();</span>
<span class="line" id="L470"> }</span>
<span class="line" id="L471"></span>
<span class="line" id="L472"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeFrame</span>(writer: <span class="tok-kw">anytype</span>, frame: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L473"> <span class="tok-kw">var</span> header = <span class="tok-kw">try</span> Header.fromImage(frame);</span>
<span class="line" id="L474"> header.comments = encoder_options.pam.comments;</span>
<span class="line" id="L475"> <span class="tok-kw">try</span> header.write(writer);</span>
<span class="line" id="L476"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..frame.height) |row| {</span>
<span class="line" id="L477"> <span class="tok-kw">const</span> offset = row * frame.width;</span>
<span class="line" id="L478"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..frame.width) |column| {</span>
<span class="line" id="L479"> <span class="tok-kw">switch</span> (frame.pixels) {</span>
<span class="line" id="L480"> .grayscale1 =&gt; |x| <span class="tok-kw">try</span> writer.writeByte(x[offset + column].value),</span>
<span class="line" id="L481"> .grayscale4 =&gt; |x| <span class="tok-kw">try</span> writer.writeByte(x[offset + column].value),</span>
<span class="line" id="L482"> .grayscale8 =&gt; |x| <span class="tok-kw">try</span> writer.writeByte(x[offset + column].value),</span>
<span class="line" id="L483"> .grayscale16 =&gt; |x| <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].value, .little),</span>
<span class="line" id="L484"> .grayscale8Alpha =&gt; |x| {</span>
<span class="line" id="L485"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].value);</span>
<span class="line" id="L486"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].alpha);</span>
<span class="line" id="L487"> },</span>
<span class="line" id="L488"> .grayscale16Alpha =&gt; |x| {</span>
<span class="line" id="L489"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].value, .little);</span>
<span class="line" id="L490"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].alpha, .little);</span>
<span class="line" id="L491"> },</span>
<span class="line" id="L492"> .bgr555 =&gt; |x| {</span>
<span class="line" id="L493"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].r);</span>
<span class="line" id="L494"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].g);</span>
<span class="line" id="L495"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].b);</span>
<span class="line" id="L496"> },</span>
<span class="line" id="L497"> .rgb555 =&gt; |x| {</span>
<span class="line" id="L498"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].r);</span>
<span class="line" id="L499"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].g);</span>
<span class="line" id="L500"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].b);</span>
<span class="line" id="L501"> },</span>
<span class="line" id="L502"> .rgb24 =&gt; |x| {</span>
<span class="line" id="L503"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].r);</span>
<span class="line" id="L504"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].g);</span>
<span class="line" id="L505"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].b);</span>
<span class="line" id="L506"> },</span>
<span class="line" id="L507"> .rgba32 =&gt; |x| {</span>
<span class="line" id="L508"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].r);</span>
<span class="line" id="L509"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].g);</span>
<span class="line" id="L510"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].b);</span>
<span class="line" id="L511"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].a);</span>
<span class="line" id="L512"> },</span>
<span class="line" id="L513"> .bgr24 =&gt; |x| {</span>
<span class="line" id="L514"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].r);</span>
<span class="line" id="L515"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].g);</span>
<span class="line" id="L516"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].b);</span>
<span class="line" id="L517"> },</span>
<span class="line" id="L518"> .bgra32 =&gt; |x| {</span>
<span class="line" id="L519"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].r);</span>
<span class="line" id="L520"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].g);</span>
<span class="line" id="L521"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].b);</span>
<span class="line" id="L522"> <span class="tok-kw">try</span> writer.writeByte(x[offset + column].a);</span>
<span class="line" id="L523"> },</span>
<span class="line" id="L524"> .rgb48 =&gt; |x| {</span>
<span class="line" id="L525"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].r, .little);</span>
<span class="line" id="L526"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].g, .little);</span>
<span class="line" id="L527"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].b, .little);</span>
<span class="line" id="L528"> },</span>
<span class="line" id="L529"> .rgba64 =&gt; |x| {</span>
<span class="line" id="L530"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].r, .little);</span>
<span class="line" id="L531"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].g, .little);</span>
<span class="line" id="L532"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].b, .little);</span>
<span class="line" id="L533"> <span class="tok-kw">try</span> writer.writeInt(<span class="tok-type">u16</span>, x[offset + column].a, .little);</span>
<span class="line" id="L534"> },</span>
<span class="line" id="L535"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>, <span class="tok-comment">// can't happen, already handled in fromImage</span>
</span>
<span class="line" id="L536"> }</span>
<span class="line" id="L537"> }</span>
<span class="line" id="L538"> }</span>
<span class="line" id="L539"> }</span>
<span class="line" id="L540">};</span>
<span class="line" id="L541"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Adapted from https://github.com/MasterQ32/zig-gamedev-lib/blob/master/src/pcx.zig</span>
</span>
<span class="line" id="L2"><span class="tok-comment">// with permission from Felix Queißner</span>
</span>
<span class="line" id="L3"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> ImageError = Image.Error;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L10"><span class="tok-kw">const</span> ImageWriteError = Image.WriteError;</span>
<span class="line" id="L11"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L12"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L13"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../utils.zig&quot;</span>);</span>
<span class="line" id="L14"><span class="tok-kw">const</span> simd = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../simd.zig&quot;</span>);</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-kw">const</span> MagicHeader: <span class="tok-type">u8</span> = <span class="tok-number">0x0A</span>;</span>
<span class="line" id="L17"><span class="tok-kw">const</span> Version: <span class="tok-type">u8</span> = <span class="tok-number">5</span>;</span>
<span class="line" id="L18"><span class="tok-kw">const</span> VGAPaletteIdentifier: <span class="tok-type">u8</span> = <span class="tok-number">0x0C</span>;</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Compression = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L21"> none,</span>
<span class="line" id="L22"> rle,</span>
<span class="line" id="L23">};</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PaletteInfo = <span class="tok-kw">enum</span>(<span class="tok-type">u16</span>) {</span>
<span class="line" id="L26"> color = <span class="tok-number">1</span>,</span>
<span class="line" id="L27"> grayscale = <span class="tok-number">2</span>,</span>
<span class="line" id="L28"> _,</span>
<span class="line" id="L29">};</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PCXHeader = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L32"> id: <span class="tok-type">u8</span> = MagicHeader,</span>
<span class="line" id="L33"> version: <span class="tok-type">u8</span> = Version,</span>
<span class="line" id="L34"> compression: Compression = .rle,</span>
<span class="line" id="L35"> bpp: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L36"> xmin: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L37"> ymin: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L38"> xmax: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L39"> ymax: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L40"> horizontal_dpi: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">320</span>, <span class="tok-comment">// Default values found in the PCX image in the test suite</span>
</span>
<span class="line" id="L41"> vertical_dpi: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">200</span>, <span class="tok-comment">// Default values found in the PCX image in the test suite</span>
</span>
<span class="line" id="L42"> builtin_palette: [<span class="tok-number">16</span>]color.Rgb24 = [_]color.Rgb24{.{ .r = <span class="tok-number">0</span>, .g = <span class="tok-number">0</span>, .b = <span class="tok-number">0</span> }} ** <span class="tok-number">16</span>,</span>
<span class="line" id="L43"> _reserved0: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L44"> planes: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L45"> stride: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L46"> palette_information: PaletteInfo <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = .color,</span>
<span class="line" id="L47"> screen_width: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L48"> screen_height: <span class="tok-type">u16</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0</span>,</span>
<span class="line" id="L49"> padding: [<span class="tok-number">54</span>]<span class="tok-type">u8</span> = [_]<span class="tok-type">u8</span>{<span class="tok-number">0</span>} ** <span class="tok-number">54</span>,</span>
<span class="line" id="L50"></span>
<span class="line" id="L51"> <span class="tok-kw">comptime</span> {</span>
<span class="line" id="L52"> std.debug.assert(<span class="tok-builtin">@sizeOf</span>(PCXHeader) == <span class="tok-number">128</span>);</span>
<span class="line" id="L53"> }</span>
<span class="line" id="L54">};</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"><span class="tok-kw">const</span> RLEPairMask = <span class="tok-number">0xC0</span>;</span>
<span class="line" id="L57"><span class="tok-kw">const</span> RLELengthMask = <span class="tok-number">0xFF</span> - RLEPairMask;</span>
<span class="line" id="L58"></span>
<span class="line" id="L59"><span class="tok-kw">const</span> RLEDecoder = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L60"> <span class="tok-kw">const</span> Run = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L61"> value: <span class="tok-type">u8</span>,</span>
<span class="line" id="L62"> remaining: <span class="tok-type">usize</span>,</span>
<span class="line" id="L63"> };</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader,</span>
<span class="line" id="L66"> current_run: ?Run,</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(reader: buffered_stream_source.DefaultBufferedStreamSourceReader.Reader) RLEDecoder {</span>
<span class="line" id="L69"> <span class="tok-kw">return</span> RLEDecoder{</span>
<span class="line" id="L70"> .reader = reader,</span>
<span class="line" id="L71"> .current_run = <span class="tok-null">null</span>,</span>
<span class="line" id="L72"> };</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> <span class="tok-kw">fn</span> <span class="tok-fn">readByte</span>(self: *RLEDecoder) ImageReadError!<span class="tok-type">u8</span> {</span>
<span class="line" id="L76"> <span class="tok-kw">if</span> (self.current_run) |*run| {</span>
<span class="line" id="L77"> <span class="tok-kw">const</span> result = run.value;</span>
<span class="line" id="L78"> run.remaining -= <span class="tok-number">1</span>;</span>
<span class="line" id="L79"> <span class="tok-kw">if</span> (run.remaining == <span class="tok-number">0</span>) {</span>
<span class="line" id="L80"> self.current_run = <span class="tok-null">null</span>;</span>
<span class="line" id="L81"> }</span>
<span class="line" id="L82"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L83"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L84"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L85"> <span class="tok-kw">const</span> byte = <span class="tok-kw">try</span> self.reader.readByte();</span>
<span class="line" id="L86"> <span class="tok-kw">if</span> (byte == RLEPairMask) <span class="tok-comment">// skip over &quot;zero length runs&quot;</span>
</span>
<span class="line" id="L87"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L88"> <span class="tok-kw">if</span> ((byte &amp; RLEPairMask) == RLEPairMask) {</span>
<span class="line" id="L89"> <span class="tok-kw">const</span> len = byte &amp; RLELengthMask;</span>
<span class="line" id="L90"> std.debug.assert(len &gt; <span class="tok-number">0</span>);</span>
<span class="line" id="L91"> <span class="tok-kw">const</span> result = <span class="tok-kw">try</span> self.reader.readByte();</span>
<span class="line" id="L92"> <span class="tok-kw">if</span> (len &gt; <span class="tok-number">1</span>) {</span>
<span class="line" id="L93"> <span class="tok-comment">// we only need to store a run in the decoder if it is longer than 1</span>
</span>
<span class="line" id="L94"> self.current_run = .{</span>
<span class="line" id="L95"> .value = result,</span>
<span class="line" id="L96"> .remaining = len - <span class="tok-number">1</span>,</span>
<span class="line" id="L97"> };</span>
<span class="line" id="L98"> }</span>
<span class="line" id="L99"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L100"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L101"> <span class="tok-kw">return</span> byte;</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103"> }</span>
<span class="line" id="L104"> }</span>
<span class="line" id="L105"> }</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"> <span class="tok-kw">fn</span> <span class="tok-fn">finish</span>(decoder: RLEDecoder) ImageReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L108"> <span class="tok-kw">if</span> (decoder.current_run != <span class="tok-null">null</span>) {</span>
<span class="line" id="L109"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L110"> }</span>
<span class="line" id="L111"> }</span>
<span class="line" id="L112">};</span>
<span class="line" id="L113"></span>
<span class="line" id="L114"><span class="tok-kw">const</span> RLEPair = <span class="tok-kw">packed</span> <span class="tok-kw">struct</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L115"> length: <span class="tok-type">u6</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L116"> identifier: <span class="tok-type">u2</span> = (<span class="tok-number">1</span> &lt;&lt; <span class="tok-number">2</span>) - <span class="tok-number">1</span>,</span>
<span class="line" id="L117">};</span>
<span class="line" id="L118"></span>
<span class="line" id="L119"><span class="tok-kw">const</span> RLEMinLength = <span class="tok-number">2</span>;</span>
<span class="line" id="L120"><span class="tok-kw">const</span> RLEMaxLength = (<span class="tok-number">1</span> &lt;&lt; <span class="tok-number">6</span>) - <span class="tok-number">1</span>;</span>
<span class="line" id="L121"></span>
<span class="line" id="L122"><span class="tok-kw">fn</span> <span class="tok-fn">flushRLE</span>(writer: <span class="tok-kw">anytype</span>, value: <span class="tok-type">u8</span>, count: <span class="tok-type">usize</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L123"> <span class="tok-kw">var</span> current_count = count;</span>
<span class="line" id="L124"> <span class="tok-kw">while</span> (current_count &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L125"> <span class="tok-kw">const</span> length_to_write = <span class="tok-builtin">@min</span>(current_count, RLEMaxLength);</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (length_to_write &gt;= RLEMinLength) {</span>
<span class="line" id="L128"> <span class="tok-kw">try</span> flushRlePair(writer, value, length_to_write);</span>
<span class="line" id="L129"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L130"> <span class="tok-kw">try</span> flushRawBytes(writer, value, length_to_write);</span>
<span class="line" id="L131"> }</span>
<span class="line" id="L132"></span>
<span class="line" id="L133"> current_count -= length_to_write;</span>
<span class="line" id="L134"> }</span>
<span class="line" id="L135">}</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"><span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">flushRlePair</span>(writer: <span class="tok-kw">anytype</span>, value: <span class="tok-type">u8</span>, count: <span class="tok-type">usize</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L138"> <span class="tok-kw">const</span> rle_pair = RLEPair{</span>
<span class="line" id="L139"> .length = <span class="tok-builtin">@truncate</span>(count),</span>
<span class="line" id="L140"> };</span>
<span class="line" id="L141"> <span class="tok-kw">try</span> writer.writeByte(<span class="tok-builtin">@bitCast</span>(rle_pair));</span>
<span class="line" id="L142"> <span class="tok-kw">try</span> writer.writeByte(value);</span>
<span class="line" id="L143">}</span>
<span class="line" id="L144"></span>
<span class="line" id="L145"><span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">flushRawBytes</span>(writer: <span class="tok-kw">anytype</span>, value: <span class="tok-type">u8</span>, count: <span class="tok-type">usize</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L146"> <span class="tok-comment">// Must flush byte greater than 192 (0xC0) as a RLE pair</span>
</span>
<span class="line" id="L147"> <span class="tok-kw">if</span> ((value &amp; RLEPairMask) == RLEPairMask) {</span>
<span class="line" id="L148"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..count) |_| {</span>
<span class="line" id="L149"> <span class="tok-kw">try</span> flushRlePair(writer, value, <span class="tok-number">1</span>);</span>
<span class="line" id="L150"> }</span>
<span class="line" id="L151"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L152"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..count) |_| {</span>
<span class="line" id="L153"> <span class="tok-kw">try</span> writer.writeByte(value);</span>
<span class="line" id="L154"> }</span>
<span class="line" id="L155"> }</span>
<span class="line" id="L156">}</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"><span class="tok-kw">const</span> RLEFastEncoder = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L159"> <span class="tok-kw">const</span> LengthToCheck = <span class="tok-number">16</span>;</span>
<span class="line" id="L160"> <span class="tok-kw">const</span> VectorType = <span class="tok-builtin">@Vector</span>(LengthToCheck, <span class="tok-type">u8</span>);</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">encode</span>(source_data: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, writer: <span class="tok-kw">anytype</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L163"> <span class="tok-kw">if</span> (source_data.len == <span class="tok-number">0</span>) {</span>
<span class="line" id="L164"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L165"> }</span>
<span class="line" id="L166"></span>
<span class="line" id="L167"> <span class="tok-kw">var</span> index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L168"></span>
<span class="line" id="L169"> <span class="tok-kw">var</span> total_similar_count: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> <span class="tok-kw">var</span> current_byte: <span class="tok-type">u8</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"> <span class="tok-kw">while</span> (index &lt; source_data.len <span class="tok-kw">and</span> (index + LengthToCheck) &lt;= source_data.len) {</span>
<span class="line" id="L174"> <span class="tok-comment">// Read current byte</span>
</span>
<span class="line" id="L175"> current_byte = source_data[index];</span>
<span class="line" id="L176"></span>
<span class="line" id="L177"> <span class="tok-kw">const</span> current_byte_splatted: VectorType = <span class="tok-builtin">@splat</span>(current_byte);</span>
<span class="line" id="L178"> <span class="tok-kw">const</span> compare_chunk = simd.load(source_data[index..], VectorType, <span class="tok-number">0</span>);</span>
<span class="line" id="L179"></span>
<span class="line" id="L180"> <span class="tok-kw">const</span> compare_mask = (current_byte_splatted == compare_chunk);</span>
<span class="line" id="L181"> <span class="tok-kw">const</span> inverted_mask = ~<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@bitCast</span>(compare_mask));</span>
<span class="line" id="L182"> <span class="tok-kw">const</span> current_similar_count = <span class="tok-builtin">@ctz</span>(inverted_mask);</span>
<span class="line" id="L183"></span>
<span class="line" id="L184"> <span class="tok-kw">if</span> (current_similar_count == LengthToCheck) {</span>
<span class="line" id="L185"> total_similar_count += current_similar_count;</span>
<span class="line" id="L186"> index += current_similar_count;</span>
<span class="line" id="L187"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L188"> total_similar_count += current_similar_count;</span>
<span class="line" id="L189"></span>
<span class="line" id="L190"> <span class="tok-kw">try</span> flushRLE(writer, current_byte, total_similar_count);</span>
<span class="line" id="L191"></span>
<span class="line" id="L192"> total_similar_count = <span class="tok-number">0</span>;</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"> index += current_similar_count;</span>
<span class="line" id="L195"> }</span>
<span class="line" id="L196"> }</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">try</span> flushRLE(writer, current_byte, total_similar_count);</span>
<span class="line" id="L199"></span>
<span class="line" id="L200"> <span class="tok-comment">// Process the rest sequentially</span>
</span>
<span class="line" id="L201"> total_similar_count = <span class="tok-number">0</span>;</span>
<span class="line" id="L202"> <span class="tok-kw">if</span> (index &lt; source_data.len) {</span>
<span class="line" id="L203"> current_byte = source_data[index];</span>
<span class="line" id="L204"></span>
<span class="line" id="L205"> <span class="tok-kw">while</span> (index &lt; source_data.len) {</span>
<span class="line" id="L206"> <span class="tok-kw">const</span> read_byte = source_data[index];</span>
<span class="line" id="L207"> <span class="tok-kw">if</span> (read_byte == current_byte) {</span>
<span class="line" id="L208"> total_similar_count += <span class="tok-number">1</span>;</span>
<span class="line" id="L209"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L210"> <span class="tok-kw">try</span> flushRLE(writer, current_byte, total_similar_count);</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> current_byte = read_byte;</span>
<span class="line" id="L213"> total_similar_count = <span class="tok-number">1</span>;</span>
<span class="line" id="L214"> }</span>
<span class="line" id="L215"></span>
<span class="line" id="L216"> index += <span class="tok-number">1</span>;</span>
<span class="line" id="L217"> }</span>
<span class="line" id="L218"></span>
<span class="line" id="L219"> <span class="tok-kw">try</span> flushRLE(writer, current_byte, total_similar_count);</span>
<span class="line" id="L220"> }</span>
<span class="line" id="L221"> }</span>
<span class="line" id="L222">};</span>
<span class="line" id="L223"></span>
<span class="line" id="L224"><span class="tok-kw">test</span> <span class="tok-str">&quot;PCX RLE Fast encoder&quot;</span> {</span>
<span class="line" id="L225"> <span class="tok-kw">const</span> uncompressed_data = [_]<span class="tok-type">u8</span>{ <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">1</span>, <span class="tok-number">64</span>, <span class="tok-number">64</span>, <span class="tok-number">2</span>, <span class="tok-number">2</span>, <span class="tok-number">2</span>, <span class="tok-number">2</span>, <span class="tok-number">2</span>, <span class="tok-number">215</span>, <span class="tok-number">215</span>, <span class="tok-number">215</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">3</span>, <span class="tok-number">200</span>, <span class="tok-number">200</span>, <span class="tok-number">200</span>, <span class="tok-number">200</span>, <span class="tok-number">210</span>, <span class="tok-number">210</span> };</span>
<span class="line" id="L226"> <span class="tok-kw">const</span> compressed_data = [_]<span class="tok-type">u8</span>{ <span class="tok-number">0xC9</span>, <span class="tok-number">0x01</span>, <span class="tok-number">0xC2</span>, <span class="tok-number">0x40</span>, <span class="tok-number">0xC5</span>, <span class="tok-number">0x02</span>, <span class="tok-number">0xC3</span>, <span class="tok-number">0xD7</span>, <span class="tok-number">0xCA</span>, <span class="tok-number">0x03</span>, <span class="tok-number">0xC4</span>, <span class="tok-number">0xC8</span>, <span class="tok-number">0xC2</span>, <span class="tok-number">0xD2</span> };</span>
<span class="line" id="L227"></span>
<span class="line" id="L228"> <span class="tok-kw">var</span> result_list = std.ArrayList(<span class="tok-type">u8</span>).init(std.testing.allocator);</span>
<span class="line" id="L229"> <span class="tok-kw">defer</span> result_list.deinit();</span>
<span class="line" id="L230"></span>
<span class="line" id="L231"> <span class="tok-kw">const</span> writer = result_list.writer();</span>
<span class="line" id="L232"></span>
<span class="line" id="L233"> <span class="tok-kw">try</span> RLEFastEncoder.encode(uncompressed_data[<span class="tok-number">0</span>..], writer);</span>
<span class="line" id="L234"></span>
<span class="line" id="L235"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, compressed_data[<span class="tok-number">0</span>..], result_list.items);</span>
<span class="line" id="L236">}</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"><span class="tok-kw">test</span> <span class="tok-str">&quot;PCX RLE Fast encoder should encore more than 63 bytes similar&quot;</span> {</span>
<span class="line" id="L239"> <span class="tok-kw">const</span> first_uncompressed_part = [_]<span class="tok-type">u8</span>{<span class="tok-number">0x45</span>} ** <span class="tok-number">65</span>;</span>
<span class="line" id="L240"> <span class="tok-kw">const</span> second_uncompresse_part = [_]<span class="tok-type">u8</span>{ <span class="tok-number">0x1</span>, <span class="tok-number">0x1</span>, <span class="tok-number">0x1</span>, <span class="tok-number">0x1</span> };</span>
<span class="line" id="L241"> <span class="tok-kw">const</span> uncompressed_data = first_uncompressed_part ++ second_uncompresse_part;</span>
<span class="line" id="L242"></span>
<span class="line" id="L243"> <span class="tok-kw">const</span> compressed_data = [_]<span class="tok-type">u8</span>{ <span class="tok-number">0xFF</span>, <span class="tok-number">0x45</span>, <span class="tok-number">0x45</span>, <span class="tok-number">0x45</span>, <span class="tok-number">0xC4</span>, <span class="tok-number">0x1</span> };</span>
<span class="line" id="L244"></span>
<span class="line" id="L245"> <span class="tok-kw">var</span> result_list = std.ArrayList(<span class="tok-type">u8</span>).init(std.testing.allocator);</span>
<span class="line" id="L246"> <span class="tok-kw">defer</span> result_list.deinit();</span>
<span class="line" id="L247"></span>
<span class="line" id="L248"> <span class="tok-kw">const</span> writer = result_list.writer();</span>
<span class="line" id="L249"></span>
<span class="line" id="L250"> <span class="tok-kw">try</span> RLEFastEncoder.encode(uncompressed_data[<span class="tok-number">0</span>..], writer);</span>
<span class="line" id="L251"></span>
<span class="line" id="L252"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, compressed_data[<span class="tok-number">0</span>..], result_list.items);</span>
<span class="line" id="L253">}</span>
<span class="line" id="L254"></span>
<span class="line" id="L255"><span class="tok-kw">const</span> RLEStreamEncoder = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L256"> rle_byte: ?<span class="tok-type">u8</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L257"> length: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L258"></span>
<span class="line" id="L259"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">encode</span>(self: *RLEStreamEncoder, writer: <span class="tok-kw">anytype</span>, bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L260"> <span class="tok-kw">for</span> (bytes) |byte| {</span>
<span class="line" id="L261"> <span class="tok-kw">try</span> self.encodeByte(writer, byte);</span>
<span class="line" id="L262"> }</span>
<span class="line" id="L263"> }</span>
<span class="line" id="L264"></span>
<span class="line" id="L265"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">encodeByte</span>(self: *RLEStreamEncoder, writer: <span class="tok-kw">anytype</span>, byte: <span class="tok-type">u8</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L266"> <span class="tok-kw">if</span> (self.rle_byte == <span class="tok-null">null</span>) {</span>
<span class="line" id="L267"> self.rle_byte = byte;</span>
<span class="line" id="L268"> self.length = <span class="tok-number">1</span>;</span>
<span class="line" id="L269"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L270"> }</span>
<span class="line" id="L271"></span>
<span class="line" id="L272"> <span class="tok-kw">if</span> (self.rle_byte) |rle_byte| {</span>
<span class="line" id="L273"> <span class="tok-kw">if</span> (rle_byte == byte) {</span>
<span class="line" id="L274"> self.length += <span class="tok-number">1</span>;</span>
<span class="line" id="L275"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L276"> <span class="tok-kw">try</span> flushRLE(writer, rle_byte, self.length);</span>
<span class="line" id="L277"></span>
<span class="line" id="L278"> self.length = <span class="tok-number">1</span>;</span>
<span class="line" id="L279"> self.rle_byte = byte;</span>
<span class="line" id="L280"> }</span>
<span class="line" id="L281"> }</span>
<span class="line" id="L282"> }</span>
<span class="line" id="L283"></span>
<span class="line" id="L284"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">flush</span>(self: *RLEStreamEncoder, writer: <span class="tok-kw">anytype</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L285"> <span class="tok-kw">if</span> (self.length == <span class="tok-number">0</span>) {</span>
<span class="line" id="L286"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L287"> }</span>
<span class="line" id="L288"></span>
<span class="line" id="L289"> <span class="tok-kw">if</span> (self.rle_byte) |check_byte| {</span>
<span class="line" id="L290"> <span class="tok-kw">try</span> flushRLE(writer, check_byte, self.length);</span>
<span class="line" id="L291"> }</span>
<span class="line" id="L292"> }</span>
<span class="line" id="L293">};</span>
<span class="line" id="L294"></span>
<span class="line" id="L295"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PCX = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L296"> header: PCXHeader = .{},</span>
<span class="line" id="L297"></span>
<span class="line" id="L298"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = <span class="tok-kw">struct</span> {};</span>
<span class="line" id="L299"></span>
<span class="line" id="L300"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L301"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L302"> .format = format,</span>
<span class="line" id="L303"> .formatDetect = formatDetect,</span>
<span class="line" id="L304"> .readImage = readImage,</span>
<span class="line" id="L305"> .writeImage = writeImage,</span>
<span class="line" id="L306"> };</span>
<span class="line" id="L307"> }</span>
<span class="line" id="L308"></span>
<span class="line" id="L309"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L310"> <span class="tok-kw">return</span> Image.Format.pcx;</span>
<span class="line" id="L311"> }</span>
<span class="line" id="L312"></span>
<span class="line" id="L313"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) ImageReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L314"> <span class="tok-kw">var</span> magic_number_bufffer: [<span class="tok-number">2</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L315"> _ = <span class="tok-kw">try</span> stream.read(magic_number_bufffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L316"></span>
<span class="line" id="L317"> <span class="tok-kw">if</span> (magic_number_bufffer[<span class="tok-number">0</span>] != MagicHeader) {</span>
<span class="line" id="L318"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L319"> }</span>
<span class="line" id="L320"></span>
<span class="line" id="L321"> <span class="tok-kw">if</span> (magic_number_bufffer[<span class="tok-number">1</span>] &gt; Version) {</span>
<span class="line" id="L322"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L323"> }</span>
<span class="line" id="L324"></span>
<span class="line" id="L325"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L326"> }</span>
<span class="line" id="L327"></span>
<span class="line" id="L328"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: Allocator, stream: *Image.Stream) ImageReadError!Image {</span>
<span class="line" id="L329"> <span class="tok-kw">var</span> result = Image.init(allocator);</span>
<span class="line" id="L330"> <span class="tok-kw">errdefer</span> result.deinit();</span>
<span class="line" id="L331"> <span class="tok-kw">var</span> pcx = PCX{};</span>
<span class="line" id="L332"></span>
<span class="line" id="L333"> <span class="tok-kw">const</span> pixels = <span class="tok-kw">try</span> pcx.read(allocator, stream);</span>
<span class="line" id="L334"></span>
<span class="line" id="L335"> result.width = pcx.width();</span>
<span class="line" id="L336"> result.height = pcx.height();</span>
<span class="line" id="L337"> result.pixels = pixels;</span>
<span class="line" id="L338"></span>
<span class="line" id="L339"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L340"> }</span>
<span class="line" id="L341"></span>
<span class="line" id="L342"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: Allocator, stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L343"> _ = allocator;</span>
<span class="line" id="L344"> _ = encoder_options;</span>
<span class="line" id="L345"></span>
<span class="line" id="L346"> <span class="tok-kw">var</span> pcx = PCX{};</span>
<span class="line" id="L347"></span>
<span class="line" id="L348"> <span class="tok-kw">if</span> (image.width &gt; std.math.maxInt(<span class="tok-type">u16</span>) <span class="tok-kw">or</span> image.height &gt; std.math.maxInt(<span class="tok-type">u16</span>)) {</span>
<span class="line" id="L349"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L350"> }</span>
<span class="line" id="L351"></span>
<span class="line" id="L352"> pcx.header.xmax = <span class="tok-builtin">@truncate</span>(image.width - <span class="tok-number">1</span>);</span>
<span class="line" id="L353"> pcx.header.ymax = <span class="tok-builtin">@truncate</span>(image.height - <span class="tok-number">1</span>);</span>
<span class="line" id="L354"></span>
<span class="line" id="L355"> <span class="tok-comment">// Fill header info based on image</span>
</span>
<span class="line" id="L356"> <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L357"> .indexed1 =&gt; |pixels| {</span>
<span class="line" id="L358"> pcx.header.bpp = <span class="tok-number">1</span>;</span>
<span class="line" id="L359"> pcx.header.planes = <span class="tok-number">1</span>;</span>
<span class="line" id="L360"></span>
<span class="line" id="L361"> pcx.fillPalette(pixels.palette);</span>
<span class="line" id="L362"> },</span>
<span class="line" id="L363"> .indexed4 =&gt; |pixels| {</span>
<span class="line" id="L364"> pcx.header.bpp = <span class="tok-number">4</span>;</span>
<span class="line" id="L365"> pcx.header.planes = <span class="tok-number">1</span>;</span>
<span class="line" id="L366"></span>
<span class="line" id="L367"> pcx.fillPalette(pixels.palette);</span>
<span class="line" id="L368"> },</span>
<span class="line" id="L369"> .indexed8 =&gt; {</span>
<span class="line" id="L370"> pcx.header.bpp = <span class="tok-number">8</span>;</span>
<span class="line" id="L371"> pcx.header.planes = <span class="tok-number">1</span>;</span>
<span class="line" id="L372"> },</span>
<span class="line" id="L373"> .rgb24 =&gt; {</span>
<span class="line" id="L374"> pcx.header.bpp = <span class="tok-number">8</span>;</span>
<span class="line" id="L375"> pcx.header.planes = <span class="tok-number">3</span>;</span>
<span class="line" id="L376"> },</span>
<span class="line" id="L377"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L378"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L379"> },</span>
<span class="line" id="L380"> }</span>
<span class="line" id="L381"></span>
<span class="line" id="L382"> pcx.header.stride = <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intFromFloat</span>((<span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(image.width)) / <span class="tok-number">8.0</span>) * <span class="tok-builtin">@as</span>(<span class="tok-type">f32</span>, <span class="tok-builtin">@floatFromInt</span>(pcx.header.bpp))));</span>
<span class="line" id="L383"> <span class="tok-comment">// Add one if the result is a odd number</span>
</span>
<span class="line" id="L384"> pcx.header.stride += (pcx.header.stride &amp; <span class="tok-number">0x1</span>);</span>
<span class="line" id="L385"></span>
<span class="line" id="L386"> <span class="tok-kw">try</span> pcx.write(stream, image.pixels);</span>
<span class="line" id="L387"> }</span>
<span class="line" id="L388"></span>
<span class="line" id="L389"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelFormat</span>(self: PCX) ImageReadError!PixelFormat {</span>
<span class="line" id="L390"> <span class="tok-kw">if</span> (self.header.planes == <span class="tok-number">1</span>) {</span>
<span class="line" id="L391"> <span class="tok-kw">switch</span> (self.header.bpp) {</span>
<span class="line" id="L392"> <span class="tok-number">1</span> =&gt; <span class="tok-kw">return</span> PixelFormat.indexed1,</span>
<span class="line" id="L393"> <span class="tok-number">4</span> =&gt; <span class="tok-kw">return</span> PixelFormat.indexed4,</span>
<span class="line" id="L394"> <span class="tok-number">8</span> =&gt; <span class="tok-kw">return</span> PixelFormat.indexed8,</span>
<span class="line" id="L395"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L396"> }</span>
<span class="line" id="L397"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (self.header.planes == <span class="tok-number">3</span>) {</span>
<span class="line" id="L398"> <span class="tok-kw">switch</span> (self.header.bpp) {</span>
<span class="line" id="L399"> <span class="tok-number">8</span> =&gt; <span class="tok-kw">return</span> PixelFormat.rgb24,</span>
<span class="line" id="L400"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L401"> }</span>
<span class="line" id="L402"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L403"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L404"> }</span>
<span class="line" id="L405"> }</span>
<span class="line" id="L406"></span>
<span class="line" id="L407"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">width</span>(self: PCX) <span class="tok-type">usize</span> {</span>
<span class="line" id="L408"> <span class="tok-kw">return</span> self.header.xmax - self.header.xmin + <span class="tok-number">1</span>;</span>
<span class="line" id="L409"> }</span>
<span class="line" id="L410"></span>
<span class="line" id="L411"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">height</span>(self: PCX) <span class="tok-type">usize</span> {</span>
<span class="line" id="L412"> <span class="tok-kw">return</span> self.header.ymax - self.header.ymin + <span class="tok-number">1</span>;</span>
<span class="line" id="L413"> }</span>
<span class="line" id="L414"></span>
<span class="line" id="L415"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(self: *PCX, allocator: Allocator, stream: *Image.Stream) ImageReadError!color.PixelStorage {</span>
<span class="line" id="L416"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L417"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L418"> self.header = <span class="tok-kw">try</span> utils.readStruct(reader, PCXHeader, .little);</span>
<span class="line" id="L419"></span>
<span class="line" id="L420"> <span class="tok-kw">if</span> (self.header.id != <span class="tok-number">0x0A</span>) {</span>
<span class="line" id="L421"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L422"> }</span>
<span class="line" id="L423"></span>
<span class="line" id="L424"> <span class="tok-kw">if</span> (self.header.version &gt; <span class="tok-number">0x05</span>) {</span>
<span class="line" id="L425"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L426"> }</span>
<span class="line" id="L427"></span>
<span class="line" id="L428"> <span class="tok-kw">if</span> (self.header.planes &gt; <span class="tok-number">3</span>) {</span>
<span class="line" id="L429"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L430"> }</span>
<span class="line" id="L431"></span>
<span class="line" id="L432"> <span class="tok-kw">const</span> pixel_format = <span class="tok-kw">try</span> self.pixelFormat();</span>
<span class="line" id="L433"></span>
<span class="line" id="L434"> <span class="tok-kw">const</span> image_width = self.width();</span>
<span class="line" id="L435"> <span class="tok-kw">const</span> image_height = self.height();</span>
<span class="line" id="L436"></span>
<span class="line" id="L437"> <span class="tok-kw">const</span> has_dummy_byte = (<span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, <span class="tok-builtin">@bitCast</span>(self.header.stride)) - <span class="tok-builtin">@as</span>(<span class="tok-type">isize</span>, <span class="tok-builtin">@bitCast</span>(image_width))) == <span class="tok-number">1</span>;</span>
<span class="line" id="L438"> <span class="tok-kw">const</span> actual_width = <span class="tok-kw">if</span> (has_dummy_byte) image_width + <span class="tok-number">1</span> <span class="tok-kw">else</span> image_width;</span>
<span class="line" id="L439"></span>
<span class="line" id="L440"> <span class="tok-kw">var</span> pixels = <span class="tok-kw">try</span> color.PixelStorage.init(allocator, pixel_format, image_width * image_height);</span>
<span class="line" id="L441"> <span class="tok-kw">errdefer</span> pixels.deinit(allocator);</span>
<span class="line" id="L442"></span>
<span class="line" id="L443"> <span class="tok-kw">var</span> decoder = RLEDecoder.init(reader);</span>
<span class="line" id="L444"></span>
<span class="line" id="L445"> <span class="tok-kw">const</span> scanline_length = (self.header.stride * self.header.planes);</span>
<span class="line" id="L446"></span>
<span class="line" id="L447"> <span class="tok-kw">var</span> y: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L448"> <span class="tok-kw">while</span> (y &lt; image_height) : (y += <span class="tok-number">1</span>) {</span>
<span class="line" id="L449"> <span class="tok-kw">var</span> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L450"> <span class="tok-kw">var</span> x: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L451"></span>
<span class="line" id="L452"> <span class="tok-kw">const</span> y_stride = y * image_width;</span>
<span class="line" id="L453"></span>
<span class="line" id="L454"> <span class="tok-comment">// read all pixels from the current row</span>
</span>
<span class="line" id="L455"> <span class="tok-kw">while</span> (offset &lt; scanline_length <span class="tok-kw">and</span> x &lt; image_width) : (offset += <span class="tok-number">1</span>) {</span>
<span class="line" id="L456"> <span class="tok-kw">const</span> byte = <span class="tok-kw">try</span> decoder.readByte();</span>
<span class="line" id="L457"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L458"> .indexed1 =&gt; |storage| {</span>
<span class="line" id="L459"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L460"> <span class="tok-kw">while</span> (i &lt; <span class="tok-number">8</span>) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L461"> <span class="tok-kw">if</span> (x &lt; image_width) {</span>
<span class="line" id="L462"> storage.indices[y_stride + x] = <span class="tok-builtin">@intCast</span>((byte &gt;&gt; (<span class="tok-number">7</span> - <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(i)))) &amp; <span class="tok-number">0x01</span>);</span>
<span class="line" id="L463"> x += <span class="tok-number">1</span>;</span>
<span class="line" id="L464"> }</span>
<span class="line" id="L465"> }</span>
<span class="line" id="L466"> },</span>
<span class="line" id="L467"> .indexed4 =&gt; |storage| {</span>
<span class="line" id="L468"> storage.indices[y_stride + x] = <span class="tok-builtin">@truncate</span>(byte &gt;&gt; <span class="tok-number">4</span>);</span>
<span class="line" id="L469"> x += <span class="tok-number">1</span>;</span>
<span class="line" id="L470"> <span class="tok-kw">if</span> (x &lt; image_width) {</span>
<span class="line" id="L471"> storage.indices[y_stride + x] = <span class="tok-builtin">@truncate</span>(byte);</span>
<span class="line" id="L472"> x += <span class="tok-number">1</span>;</span>
<span class="line" id="L473"> }</span>
<span class="line" id="L474"> },</span>
<span class="line" id="L475"> .indexed8 =&gt; |storage| {</span>
<span class="line" id="L476"> storage.indices[y_stride + x] = byte;</span>
<span class="line" id="L477"> x += <span class="tok-number">1</span>;</span>
<span class="line" id="L478"> },</span>
<span class="line" id="L479"> .rgb24 =&gt; |storage| {</span>
<span class="line" id="L480"> <span class="tok-kw">if</span> (has_dummy_byte <span class="tok-kw">and</span> byte == <span class="tok-number">0x00</span>) {</span>
<span class="line" id="L481"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L482"> }</span>
<span class="line" id="L483"> <span class="tok-kw">const</span> pixel_x = offset % (actual_width);</span>
<span class="line" id="L484"> <span class="tok-kw">const</span> current_color = offset / (actual_width);</span>
<span class="line" id="L485"> <span class="tok-kw">switch</span> (current_color) {</span>
<span class="line" id="L486"> <span class="tok-number">0</span> =&gt; {</span>
<span class="line" id="L487"> storage[y_stride + pixel_x].r = byte;</span>
<span class="line" id="L488"> },</span>
<span class="line" id="L489"> <span class="tok-number">1</span> =&gt; {</span>
<span class="line" id="L490"> storage[y_stride + pixel_x].g = byte;</span>
<span class="line" id="L491"> },</span>
<span class="line" id="L492"> <span class="tok-number">2</span> =&gt; {</span>
<span class="line" id="L493"> storage[y_stride + pixel_x].b = byte;</span>
<span class="line" id="L494"> },</span>
<span class="line" id="L495"> <span class="tok-kw">else</span> =&gt; {},</span>
<span class="line" id="L496"> }</span>
<span class="line" id="L497"></span>
<span class="line" id="L498"> <span class="tok-kw">if</span> (pixel_x &gt; <span class="tok-number">0</span> <span class="tok-kw">and</span> (pixel_x % self.header.planes) == <span class="tok-number">0</span>) {</span>
<span class="line" id="L499"> x += <span class="tok-number">1</span>;</span>
<span class="line" id="L500"> }</span>
<span class="line" id="L501"> },</span>
<span class="line" id="L502"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L503"> }</span>
<span class="line" id="L504"> }</span>
<span class="line" id="L505"></span>
<span class="line" id="L506"> <span class="tok-comment">// discard the rest of the bytes in the current row</span>
</span>
<span class="line" id="L507"> <span class="tok-kw">while</span> (offset &lt; self.header.stride) : (offset += <span class="tok-number">1</span>) {</span>
<span class="line" id="L508"> _ = <span class="tok-kw">try</span> decoder.readByte();</span>
<span class="line" id="L509"> }</span>
<span class="line" id="L510"> }</span>
<span class="line" id="L511"></span>
<span class="line" id="L512"> <span class="tok-kw">try</span> decoder.finish();</span>
<span class="line" id="L513"></span>
<span class="line" id="L514"> <span class="tok-kw">if</span> (pixel_format == .indexed1 <span class="tok-kw">or</span> pixel_format == .indexed4 <span class="tok-kw">or</span> pixel_format == .indexed8) {</span>
<span class="line" id="L515"> <span class="tok-kw">var</span> palette = <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L516"> .indexed1 =&gt; |*storage| storage.palette[<span class="tok-number">0</span>..],</span>
<span class="line" id="L517"> .indexed4 =&gt; |*storage| storage.palette[<span class="tok-number">0</span>..],</span>
<span class="line" id="L518"> .indexed8 =&gt; |*storage| storage.palette[<span class="tok-number">0</span>..],</span>
<span class="line" id="L519"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">undefined</span>,</span>
<span class="line" id="L520"> };</span>
<span class="line" id="L521"></span>
<span class="line" id="L522"> <span class="tok-kw">const</span> effective_len = <span class="tok-builtin">@min</span>(palette.len, self.header.builtin_palette.len);</span>
<span class="line" id="L523"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..effective_len) |index| {</span>
<span class="line" id="L524"> palette[index].r = self.header.builtin_palette[index].r;</span>
<span class="line" id="L525"> palette[index].g = self.header.builtin_palette[index].g;</span>
<span class="line" id="L526"> palette[index].b = self.header.builtin_palette[index].b;</span>
<span class="line" id="L527"> palette[index].a = <span class="tok-number">255</span>;</span>
<span class="line" id="L528"> }</span>
<span class="line" id="L529"></span>
<span class="line" id="L530"> <span class="tok-kw">if</span> (pixels == .indexed8) {</span>
<span class="line" id="L531"> <span class="tok-kw">const</span> end_pos = <span class="tok-kw">try</span> buffered_stream.getEndPos();</span>
<span class="line" id="L532"> <span class="tok-kw">try</span> buffered_stream.seekTo(end_pos - <span class="tok-number">769</span>);</span>
<span class="line" id="L533"></span>
<span class="line" id="L534"> <span class="tok-kw">if</span> ((<span class="tok-kw">try</span> reader.readByte()) != VGAPaletteIdentifier) {</span>
<span class="line" id="L535"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L536"> }</span>
<span class="line" id="L537"></span>
<span class="line" id="L538"> <span class="tok-kw">for</span> (palette) |*current_entry| {</span>
<span class="line" id="L539"> current_entry.r = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L540"> current_entry.g = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L541"> current_entry.b = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L542"> current_entry.a = <span class="tok-number">255</span>;</span>
<span class="line" id="L543"> }</span>
<span class="line" id="L544"> }</span>
<span class="line" id="L545"> }</span>
<span class="line" id="L546"></span>
<span class="line" id="L547"> <span class="tok-kw">return</span> pixels;</span>
<span class="line" id="L548"> }</span>
<span class="line" id="L549"></span>
<span class="line" id="L550"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: PCX, stream: *Image.Stream, pixels: color.PixelStorage) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L551"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L552"> .indexed1,</span>
<span class="line" id="L553"> .indexed4,</span>
<span class="line" id="L554"> .indexed8,</span>
<span class="line" id="L555"> .rgb24,</span>
<span class="line" id="L556"> =&gt; {</span>
<span class="line" id="L557"> <span class="tok-comment">// Do nothing</span>
</span>
<span class="line" id="L558"> },</span>
<span class="line" id="L559"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L560"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L561"> },</span>
<span class="line" id="L562"> }</span>
<span class="line" id="L563"></span>
<span class="line" id="L564"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceWriter(stream);</span>
<span class="line" id="L565"></span>
<span class="line" id="L566"> <span class="tok-kw">const</span> writer = buffered_stream.writer();</span>
<span class="line" id="L567"></span>
<span class="line" id="L568"> <span class="tok-kw">try</span> utils.writeStruct(writer, self.header, .little);</span>
<span class="line" id="L569"></span>
<span class="line" id="L570"> <span class="tok-kw">const</span> actual_width = self.width();</span>
<span class="line" id="L571"> <span class="tok-kw">const</span> is_even = ((actual_width &amp; <span class="tok-number">0x1</span>) == <span class="tok-number">0</span>);</span>
<span class="line" id="L572"></span>
<span class="line" id="L573"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L574"> .indexed1 =&gt; |indexed| {</span>
<span class="line" id="L575"> <span class="tok-kw">try</span> self.writeIndexed1(writer, indexed);</span>
<span class="line" id="L576"> },</span>
<span class="line" id="L577"> .indexed4 =&gt; |indexed| {</span>
<span class="line" id="L578"> <span class="tok-kw">try</span> self.writeIndexed4(writer, indexed);</span>
<span class="line" id="L579"> },</span>
<span class="line" id="L580"> .indexed8 =&gt; |indexed| {</span>
<span class="line" id="L581"> <span class="tok-kw">if</span> (is_even) {</span>
<span class="line" id="L582"> <span class="tok-kw">try</span> writeIndexed8Even(writer, indexed);</span>
<span class="line" id="L583"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L584"> <span class="tok-kw">try</span> self.writeIndexed8Odd(writer, indexed);</span>
<span class="line" id="L585"> }</span>
<span class="line" id="L586"></span>
<span class="line" id="L587"> <span class="tok-comment">// Write VGA palette</span>
</span>
<span class="line" id="L588"> <span class="tok-kw">try</span> writer.writeByte(VGAPaletteIdentifier);</span>
<span class="line" id="L589"> <span class="tok-kw">for</span> (pixels.indexed8.palette) |current_entry| {</span>
<span class="line" id="L590"> <span class="tok-kw">const</span> rgb24_color = color.Rgb24.fromU32Rgba(current_entry.toU32Rgba());</span>
<span class="line" id="L591"> <span class="tok-kw">try</span> utils.writeStruct(writer, rgb24_color, .little);</span>
<span class="line" id="L592"> }</span>
<span class="line" id="L593"> },</span>
<span class="line" id="L594"> .rgb24 =&gt; |data| {</span>
<span class="line" id="L595"> <span class="tok-kw">try</span> self.writeRgb24(writer, data);</span>
<span class="line" id="L596"> },</span>
<span class="line" id="L597"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L598"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L599"> },</span>
<span class="line" id="L600"> }</span>
<span class="line" id="L601"></span>
<span class="line" id="L602"> <span class="tok-kw">try</span> buffered_stream.flush();</span>
<span class="line" id="L603"> }</span>
<span class="line" id="L604"></span>
<span class="line" id="L605"> <span class="tok-kw">fn</span> <span class="tok-fn">fillPalette</span>(self: *PCX, palette: []<span class="tok-kw">const</span> color.Rgba32) <span class="tok-type">void</span> {</span>
<span class="line" id="L606"> <span class="tok-kw">const</span> effective_len = <span class="tok-builtin">@min</span>(palette.len, self.header.builtin_palette.len);</span>
<span class="line" id="L607"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..effective_len) |index| {</span>
<span class="line" id="L608"> self.header.builtin_palette[index].r = palette[index].r;</span>
<span class="line" id="L609"> self.header.builtin_palette[index].g = palette[index].g;</span>
<span class="line" id="L610"> self.header.builtin_palette[index].b = palette[index].b;</span>
<span class="line" id="L611"> }</span>
<span class="line" id="L612"> }</span>
<span class="line" id="L613"></span>
<span class="line" id="L614"> <span class="tok-kw">fn</span> <span class="tok-fn">writeIndexed1</span>(self: *<span class="tok-kw">const</span> PCX, writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, indexed: color.IndexedStorage1) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L615"> <span class="tok-kw">var</span> rle_encoder = RLEStreamEncoder{};</span>
<span class="line" id="L616"></span>
<span class="line" id="L617"> <span class="tok-kw">const</span> image_width = self.width();</span>
<span class="line" id="L618"> <span class="tok-kw">const</span> image_height = self.height();</span>
<span class="line" id="L619"></span>
<span class="line" id="L620"> <span class="tok-kw">const</span> is_even = ((image_width &amp; <span class="tok-number">0x1</span>) == <span class="tok-number">0</span>);</span>
<span class="line" id="L621"></span>
<span class="line" id="L622"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_height) |y| {</span>
<span class="line" id="L623"> <span class="tok-kw">const</span> stride = y * image_width;</span>
<span class="line" id="L624"></span>
<span class="line" id="L625"> <span class="tok-kw">var</span> current_byte: <span class="tok-type">u8</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L626"></span>
<span class="line" id="L627"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_width) |x| {</span>
<span class="line" id="L628"> <span class="tok-kw">const</span> pixel = indexed.indices[stride + x];</span>
<span class="line" id="L629"></span>
<span class="line" id="L630"> <span class="tok-kw">const</span> bit = <span class="tok-builtin">@as</span>(<span class="tok-type">u3</span>, <span class="tok-builtin">@intCast</span>(<span class="tok-number">7</span> - (x % <span class="tok-number">8</span>)));</span>
<span class="line" id="L631"></span>
<span class="line" id="L632"> current_byte |= <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, pixel) &lt;&lt; bit;</span>
<span class="line" id="L633"> <span class="tok-kw">if</span> (bit == <span class="tok-number">0</span>) {</span>
<span class="line" id="L634"> <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_byte);</span>
<span class="line" id="L635"> current_byte = <span class="tok-number">0</span>;</span>
<span class="line" id="L636"> }</span>
<span class="line" id="L637"> }</span>
<span class="line" id="L638"></span>
<span class="line" id="L639"> <span class="tok-kw">if</span> (!is_even) {</span>
<span class="line" id="L640"> <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_byte);</span>
<span class="line" id="L641"> }</span>
<span class="line" id="L642"> }</span>
<span class="line" id="L643"></span>
<span class="line" id="L644"> <span class="tok-kw">try</span> rle_encoder.flush(writer);</span>
<span class="line" id="L645"> }</span>
<span class="line" id="L646"></span>
<span class="line" id="L647"> <span class="tok-kw">fn</span> <span class="tok-fn">writeIndexed4</span>(self: *<span class="tok-kw">const</span> PCX, writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, indexed: color.IndexedStorage4) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L648"> <span class="tok-kw">var</span> rle_encoder = RLEStreamEncoder{};</span>
<span class="line" id="L649"></span>
<span class="line" id="L650"> <span class="tok-kw">const</span> image_width = self.width();</span>
<span class="line" id="L651"> <span class="tok-kw">const</span> image_height = self.height();</span>
<span class="line" id="L652"></span>
<span class="line" id="L653"> <span class="tok-kw">const</span> is_even = ((image_width &amp; <span class="tok-number">0x1</span>) == <span class="tok-number">0</span>);</span>
<span class="line" id="L654"></span>
<span class="line" id="L655"> <span class="tok-kw">var</span> current_byte: <span class="tok-type">u8</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L656"></span>
<span class="line" id="L657"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_height) |y| {</span>
<span class="line" id="L658"> <span class="tok-kw">const</span> stride = y * image_width;</span>
<span class="line" id="L659"></span>
<span class="line" id="L660"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_width) |x| {</span>
<span class="line" id="L661"> <span class="tok-kw">const</span> pixel = indexed.indices[stride + x];</span>
<span class="line" id="L662"></span>
<span class="line" id="L663"> <span class="tok-kw">if</span> ((x &amp; <span class="tok-number">0x1</span>) == <span class="tok-number">0x1</span>) {</span>
<span class="line" id="L664"> current_byte |= pixel;</span>
<span class="line" id="L665"> <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_byte);</span>
<span class="line" id="L666"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L667"> current_byte = <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, pixel) &lt;&lt; <span class="tok-number">4</span>;</span>
<span class="line" id="L668"> }</span>
<span class="line" id="L669"> }</span>
<span class="line" id="L670"></span>
<span class="line" id="L671"> <span class="tok-kw">if</span> (!is_even) {</span>
<span class="line" id="L672"> <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_byte);</span>
<span class="line" id="L673"> }</span>
<span class="line" id="L674"> }</span>
<span class="line" id="L675"></span>
<span class="line" id="L676"> <span class="tok-kw">try</span> rle_encoder.flush(writer);</span>
<span class="line" id="L677"> }</span>
<span class="line" id="L678"></span>
<span class="line" id="L679"> <span class="tok-kw">fn</span> <span class="tok-fn">writeIndexed8Even</span>(writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, indexed: color.IndexedStorage8) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L680"> <span class="tok-kw">try</span> RLEFastEncoder.encode(indexed.indices, writer);</span>
<span class="line" id="L681"> }</span>
<span class="line" id="L682"></span>
<span class="line" id="L683"> <span class="tok-kw">fn</span> <span class="tok-fn">writeIndexed8Odd</span>(self: *<span class="tok-kw">const</span> PCX, writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, indexed: color.IndexedStorage8) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L684"> <span class="tok-kw">var</span> rle_encoder = RLEStreamEncoder{};</span>
<span class="line" id="L685"></span>
<span class="line" id="L686"> <span class="tok-kw">const</span> image_width = self.width();</span>
<span class="line" id="L687"> <span class="tok-kw">const</span> image_height = self.height();</span>
<span class="line" id="L688"></span>
<span class="line" id="L689"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_height) |y| {</span>
<span class="line" id="L690"> <span class="tok-kw">const</span> y_stride = y * image_width;</span>
<span class="line" id="L691"></span>
<span class="line" id="L692"> <span class="tok-kw">const</span> pixel_stride = indexed.indices[y_stride..(y_stride + image_width)];</span>
<span class="line" id="L693"> <span class="tok-kw">try</span> rle_encoder.encode(writer, pixel_stride);</span>
<span class="line" id="L694"> <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, <span class="tok-number">0x00</span>);</span>
<span class="line" id="L695"> }</span>
<span class="line" id="L696"></span>
<span class="line" id="L697"> <span class="tok-kw">try</span> rle_encoder.flush(writer);</span>
<span class="line" id="L698"> }</span>
<span class="line" id="L699"></span>
<span class="line" id="L700"> <span class="tok-kw">fn</span> <span class="tok-fn">writeRgb24</span>(self: *<span class="tok-kw">const</span> PCX, writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, pixels: []<span class="tok-kw">const</span> color.Rgb24) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L701"> <span class="tok-kw">var</span> rle_encoder = RLEStreamEncoder{};</span>
<span class="line" id="L702"></span>
<span class="line" id="L703"> <span class="tok-kw">const</span> image_width = self.width();</span>
<span class="line" id="L704"> <span class="tok-kw">const</span> image_height = self.height();</span>
<span class="line" id="L705"></span>
<span class="line" id="L706"> <span class="tok-kw">const</span> is_even = ((image_width &amp; <span class="tok-number">0x1</span>) == <span class="tok-number">0</span>);</span>
<span class="line" id="L707"></span>
<span class="line" id="L708"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_height) |y| {</span>
<span class="line" id="L709"> <span class="tok-kw">const</span> stride = y * image_width;</span>
<span class="line" id="L710"></span>
<span class="line" id="L711"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..<span class="tok-number">3</span>) |plane| {</span>
<span class="line" id="L712"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..image_width) |x| {</span>
<span class="line" id="L713"> <span class="tok-kw">const</span> current_color = pixels[stride + x];</span>
<span class="line" id="L714"> <span class="tok-kw">switch</span> (plane) {</span>
<span class="line" id="L715"> <span class="tok-number">0</span> =&gt; <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_color.r),</span>
<span class="line" id="L716"> <span class="tok-number">1</span> =&gt; <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_color.g),</span>
<span class="line" id="L717"> <span class="tok-number">2</span> =&gt; <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, current_color.b),</span>
<span class="line" id="L718"> <span class="tok-kw">else</span> =&gt; {},</span>
<span class="line" id="L719"> }</span>
<span class="line" id="L720"> }</span>
<span class="line" id="L721"></span>
<span class="line" id="L722"> <span class="tok-kw">if</span> (!is_even) {</span>
<span class="line" id="L723"> <span class="tok-kw">try</span> rle_encoder.encodeByte(writer, <span class="tok-number">0x00</span>);</span>
<span class="line" id="L724"> }</span>
<span class="line" id="L725"> }</span>
<span class="line" id="L726"> }</span>
<span class="line" id="L727"></span>
<span class="line" id="L728"> <span class="tok-kw">try</span> rle_encoder.flush(writer);</span>
<span class="line" id="L729"> }</span>
<span class="line" id="L730">};</span>
<span class="line" id="L731"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Implement PNG image format according to W3C Portable Network Graphics (PNG) specification second edition (ISO/IEC 15948:2003 (E))</span>
</span>
<span class="line" id="L2"><span class="tok-comment">// Last version: https://www.w3.org/TR/PNG/</span>
</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> chunk_writer = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;png/chunk_writer.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> filter = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;png/filtering.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L11"><span class="tok-kw">const</span> ImageWriteError = Image.WriteError;</span>
<span class="line" id="L12"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L13"><span class="tok-kw">const</span> reader = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;png/reader.zig&quot;</span>);</span>
<span class="line" id="L14"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L15"><span class="tok-kw">const</span> types = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;png/types.zig&quot;</span>);</span>
<span class="line" id="L16"><span class="tok-kw">const</span> ZlibCompressor = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;png/zlib_compressor.zig&quot;</span>).ZlibCompressor;</span>
<span class="line" id="L17"></span>
<span class="line" id="L18"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> HeaderData = types.HeaderData;</span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ColorType = types.ColorType;</span>
<span class="line" id="L20"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CompressionMethod = types.CompressionMethod;</span>
<span class="line" id="L21"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterMethod = types.FilterMethod;</span>
<span class="line" id="L22"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterType = types.FilterType;</span>
<span class="line" id="L23"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> InterlaceMethod = types.InterlaceMethod;</span>
<span class="line" id="L24"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Chunks = types.Chunks;</span>
<span class="line" id="L25"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> isChunkCritical = reader.isChunkCritical;</span>
<span class="line" id="L26"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> load = reader.load;</span>
<span class="line" id="L27"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> loadHeader = reader.loadHeader;</span>
<span class="line" id="L28"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> loadWithHeader = reader.loadWithHeader;</span>
<span class="line" id="L29"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ChunkProcessData = reader.ChunkProcessData;</span>
<span class="line" id="L30"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PaletteProcessData = reader.PaletteProcessData;</span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> RowProcessData = reader.RowProcessData;</span>
<span class="line" id="L32"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ReaderProcessor = reader.ReaderProcessor;</span>
<span class="line" id="L33"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> TrnsProcessor = reader.TrnsProcessor;</span>
<span class="line" id="L34"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PlteProcessor = reader.PlteProcessor;</span>
<span class="line" id="L35"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ReaderOptions = reader.ReaderOptions;</span>
<span class="line" id="L36"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> DefaultProcessors = reader.DefaultProcessors;</span>
<span class="line" id="L37"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> DefaultOptions = reader.DefaultOptions;</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PNG = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L40"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L41"></span>
<span class="line" id="L42"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L43"> <span class="tok-comment">// For progressive rendering of big images</span>
</span>
<span class="line" id="L44"> interlaced: <span class="tok-type">bool</span> = <span class="tok-null">false</span>,</span>
<span class="line" id="L45"> <span class="tok-comment">// Changing this can affect performance positively or negatively</span>
</span>
<span class="line" id="L46"> filter_choice: filter.FilterChoice = .heuristic,</span>
<span class="line" id="L47"> };</span>
<span class="line" id="L48"></span>
<span class="line" id="L49"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L50"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L51"> .format = format,</span>
<span class="line" id="L52"> .formatDetect = formatDetect,</span>
<span class="line" id="L53"> .readImage = readImage,</span>
<span class="line" id="L54"> .writeImage = writeImage,</span>
<span class="line" id="L55"> };</span>
<span class="line" id="L56"> }</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L59"> <span class="tok-kw">return</span> Image.Format.png;</span>
<span class="line" id="L60"> }</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) ImageReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L63"> <span class="tok-kw">var</span> magic_buffer: [types.magic_header.len]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> _ = <span class="tok-kw">try</span> stream.reader().readAll(magic_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L66"></span>
<span class="line" id="L67"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, magic_buffer[<span class="tok-number">0</span>..], types.magic_header[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: Allocator, stream: *Image.Stream) ImageReadError!Image {</span>
<span class="line" id="L71"> <span class="tok-kw">var</span> default_options = DefaultOptions{};</span>
<span class="line" id="L72"> <span class="tok-kw">return</span> load(stream, allocator, default_options.get());</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: Allocator, write_stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L76"> <span class="tok-kw">const</span> options = encoder_options.png;</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"> <span class="tok-kw">try</span> ensureWritable(image);</span>
<span class="line" id="L79"></span>
<span class="line" id="L80"> <span class="tok-kw">const</span> header = HeaderData{</span>
<span class="line" id="L81"> .width = <span class="tok-builtin">@truncate</span>(image.width),</span>
<span class="line" id="L82"> .height = <span class="tok-builtin">@truncate</span>(image.height),</span>
<span class="line" id="L83"> .bit_depth = image.pixelFormat().bitsPerChannel(),</span>
<span class="line" id="L84"> .color_type = <span class="tok-kw">try</span> types.ColorType.fromPixelFormat(image.pixelFormat()),</span>
<span class="line" id="L85"> .compression_method = .deflate,</span>
<span class="line" id="L86"> .filter_method = .adaptive,</span>
<span class="line" id="L87"> .interlace_method = <span class="tok-kw">if</span> (options.interlaced) .adam7 <span class="tok-kw">else</span> .none,</span>
<span class="line" id="L88"> };</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> std.debug.assert(header.isValid());</span>
<span class="line" id="L91"></span>
<span class="line" id="L92"> <span class="tok-kw">try</span> write(allocator, write_stream, image.pixels, header, options.filter_choice);</span>
<span class="line" id="L93"> }</span>
<span class="line" id="L94"></span>
<span class="line" id="L95"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(allocator: Allocator, write_stream: *Image.Stream, pixels: color.PixelStorage, header: HeaderData, filter_choice: filter.FilterChoice) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L96"> <span class="tok-kw">if</span> (header.interlace_method != .none)</span>
<span class="line" id="L97"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L98"> <span class="tok-kw">if</span> (header.compression_method != .deflate)</span>
<span class="line" id="L99"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L100"> <span class="tok-kw">if</span> (header.filter_method != .adaptive)</span>
<span class="line" id="L101"> <span class="tok-kw">return</span> ImageWriteError.Unsupported;</span>
<span class="line" id="L102"></span>
<span class="line" id="L103"> <span class="tok-kw">const</span> writer = write_stream.writer();</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> <span class="tok-kw">try</span> writeSignature(writer);</span>
<span class="line" id="L106"> <span class="tok-kw">try</span> writeHeader(writer, header);</span>
<span class="line" id="L107"> <span class="tok-kw">if</span> (PixelFormat.isIndexed(pixels)) {</span>
<span class="line" id="L108"> <span class="tok-kw">try</span> writePalette(writer, pixels);</span>
<span class="line" id="L109"> <span class="tok-kw">try</span> writeTransparencyInfo(writer, pixels); <span class="tok-comment">// TODO: pixel format where there is no transparency</span>
</span>
<span class="line" id="L110"> }</span>
<span class="line" id="L111"> <span class="tok-kw">try</span> writeData(allocator, writer, pixels, header, filter_choice);</span>
<span class="line" id="L112"> <span class="tok-kw">try</span> writeTrailer(writer);</span>
<span class="line" id="L113"> }</span>
<span class="line" id="L114"></span>
<span class="line" id="L115"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ensureWritable</span>(image: Image) !<span class="tok-type">void</span> {</span>
<span class="line" id="L116"> <span class="tok-kw">if</span> (image.width &gt; std.math.maxInt(<span class="tok-type">u31</span>))</span>
<span class="line" id="L117"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported;</span>
<span class="line" id="L118"> <span class="tok-kw">if</span> (image.height &gt; std.math.maxInt(<span class="tok-type">u31</span>))</span>
<span class="line" id="L119"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported;</span>
<span class="line" id="L120"></span>
<span class="line" id="L121"> <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L122"> .rgb24, .rgb48, .rgba32, .rgba64, .grayscale8, .grayscale16, .grayscale8Alpha, .grayscale16Alpha, .indexed8 =&gt; {},</span>
<span class="line" id="L123"></span>
<span class="line" id="L124"> .grayscale1, .grayscale2, .grayscale4, .indexed1, .indexed2, .indexed4 =&gt; <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported, <span class="tok-comment">// TODO</span>
</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"> <span class="tok-comment">// Should bgr be supported with swapping operations during the filtering?</span>
</span>
<span class="line" id="L127"></span>
<span class="line" id="L128"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported,</span>
<span class="line" id="L129"> }</span>
<span class="line" id="L130"> }</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"> <span class="tok-kw">fn</span> <span class="tok-fn">writeSignature</span>(writer: <span class="tok-kw">anytype</span>) !<span class="tok-type">void</span> {</span>
<span class="line" id="L133"> <span class="tok-kw">try</span> writer.writeAll(types.magic_header);</span>
<span class="line" id="L134"> }</span>
<span class="line" id="L135"></span>
<span class="line" id="L136"> <span class="tok-comment">// IHDR</span>
</span>
<span class="line" id="L137"> <span class="tok-kw">fn</span> <span class="tok-fn">writeHeader</span>(writer: <span class="tok-kw">anytype</span>, header: HeaderData) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L138"> <span class="tok-kw">var</span> chunk = chunk_writer.chunkWriter(writer, <span class="tok-str">&quot;IHDR&quot;</span>);</span>
<span class="line" id="L139"> <span class="tok-kw">var</span> chunk_wr = chunk.writer();</span>
<span class="line" id="L140"></span>
<span class="line" id="L141"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u32</span>, header.width, .big);</span>
<span class="line" id="L142"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u32</span>, header.height, .big);</span>
<span class="line" id="L143"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u8</span>, header.bit_depth, .big);</span>
<span class="line" id="L144"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u8</span>, <span class="tok-builtin">@intFromEnum</span>(header.color_type), .big);</span>
<span class="line" id="L145"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u8</span>, <span class="tok-builtin">@intFromEnum</span>(header.compression_method), .big);</span>
<span class="line" id="L146"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u8</span>, <span class="tok-builtin">@intFromEnum</span>(header.filter_method), .big);</span>
<span class="line" id="L147"> <span class="tok-kw">try</span> chunk_wr.writeInt(<span class="tok-type">u8</span>, <span class="tok-builtin">@intFromEnum</span>(header.interlace_method), .big);</span>
<span class="line" id="L148"></span>
<span class="line" id="L149"> <span class="tok-kw">try</span> chunk.flush();</span>
<span class="line" id="L150"> }</span>
<span class="line" id="L151"></span>
<span class="line" id="L152"> <span class="tok-comment">// IDAT (multiple maybe)</span>
</span>
<span class="line" id="L153"> <span class="tok-kw">fn</span> <span class="tok-fn">writeData</span>(allocator: Allocator, writer: <span class="tok-kw">anytype</span>, pixels: color.PixelStorage, header: HeaderData, filter_choice: filter.FilterChoice) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L154"> <span class="tok-comment">// Note: there may be more than 1 chunk</span>
</span>
<span class="line" id="L155"> <span class="tok-comment">// TODO: provide choice of how much it buffers (how much data per idat chunk)</span>
</span>
<span class="line" id="L156"> <span class="tok-kw">var</span> chunks = chunk_writer.chunkWriter(writer, <span class="tok-str">&quot;IDAT&quot;</span>);</span>
<span class="line" id="L157"> <span class="tok-kw">const</span> chunk_wr = chunks.writer();</span>
<span class="line" id="L158"></span>
<span class="line" id="L159"> <span class="tok-kw">var</span> zlib: ZlibCompressor(<span class="tok-builtin">@TypeOf</span>(chunk_wr)) = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L160"> <span class="tok-kw">try</span> zlib.init(allocator, chunk_wr);</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"> <span class="tok-kw">try</span> zlib.begin();</span>
<span class="line" id="L163"> <span class="tok-kw">try</span> filter.filter(zlib.writer(), pixels, filter_choice, header);</span>
<span class="line" id="L164"> <span class="tok-kw">try</span> zlib.end();</span>
<span class="line" id="L165"></span>
<span class="line" id="L166"> <span class="tok-kw">try</span> chunks.flush();</span>
<span class="line" id="L167"> }</span>
<span class="line" id="L168"></span>
<span class="line" id="L169"> <span class="tok-comment">// IEND chunk</span>
</span>
<span class="line" id="L170"> <span class="tok-kw">fn</span> <span class="tok-fn">writeTrailer</span>(writer: <span class="tok-kw">anytype</span>) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L171"> <span class="tok-kw">var</span> chunk = chunk_writer.chunkWriter(writer, <span class="tok-str">&quot;IEND&quot;</span>);</span>
<span class="line" id="L172"> <span class="tok-kw">try</span> chunk.flush();</span>
<span class="line" id="L173"> }</span>
<span class="line" id="L174"></span>
<span class="line" id="L175"> <span class="tok-comment">// PLTE (if indexed storage)</span>
</span>
<span class="line" id="L176"> <span class="tok-kw">fn</span> <span class="tok-fn">writePalette</span>(writer: <span class="tok-kw">anytype</span>, pixels: color.PixelStorage) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L177"> <span class="tok-kw">var</span> chunk = chunk_writer.chunkWriter(writer, <span class="tok-str">&quot;PLTE&quot;</span>);</span>
<span class="line" id="L178"> <span class="tok-kw">var</span> chunk_wr = chunk.writer();</span>
<span class="line" id="L179"></span>
<span class="line" id="L180"> <span class="tok-kw">const</span> palette = <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L181"> .indexed1 =&gt; |d| d.palette,</span>
<span class="line" id="L182"> .indexed2 =&gt; |d| d.palette,</span>
<span class="line" id="L183"> .indexed4 =&gt; |d| d.palette,</span>
<span class="line" id="L184"> .indexed8 =&gt; |d| d.palette,</span>
<span class="line" id="L185"> .indexed16 =&gt; <span class="tok-kw">return</span> ImageWriteError.Unsupported,</span>
<span class="line" id="L186"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L187"> };</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"> <span class="tok-kw">for</span> (palette) |col| {</span>
<span class="line" id="L190"> <span class="tok-kw">try</span> chunk_wr.writeByte(col.r);</span>
<span class="line" id="L191"> <span class="tok-kw">try</span> chunk_wr.writeByte(col.g);</span>
<span class="line" id="L192"> <span class="tok-kw">try</span> chunk_wr.writeByte(col.b);</span>
<span class="line" id="L193"> }</span>
<span class="line" id="L194"></span>
<span class="line" id="L195"> <span class="tok-kw">try</span> chunk.flush();</span>
<span class="line" id="L196"> }</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-comment">// tRNS (if indexed storage with transparency (there may be other uses later))</span>
</span>
<span class="line" id="L199"> <span class="tok-kw">fn</span> <span class="tok-fn">writeTransparencyInfo</span>(writer: <span class="tok-kw">anytype</span>, pixels: color.PixelStorage) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L200"> <span class="tok-kw">var</span> chunk = chunk_writer.chunkWriter(writer, <span class="tok-str">&quot;tRNS&quot;</span>);</span>
<span class="line" id="L201"> <span class="tok-kw">var</span> chunk_wr = chunk.writer();</span>
<span class="line" id="L202"></span>
<span class="line" id="L203"> <span class="tok-kw">const</span> palette = <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L204"> .indexed1 =&gt; |d| d.palette,</span>
<span class="line" id="L205"> .indexed2 =&gt; |d| d.palette,</span>
<span class="line" id="L206"> .indexed4 =&gt; |d| d.palette,</span>
<span class="line" id="L207"> .indexed8 =&gt; |d| d.palette,</span>
<span class="line" id="L208"> .indexed16 =&gt; <span class="tok-kw">return</span> ImageWriteError.Unsupported,</span>
<span class="line" id="L209"> <span class="tok-comment">// TODO: png support transparency info for other formats?</span>
</span>
<span class="line" id="L210"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L211"> };</span>
<span class="line" id="L212"></span>
<span class="line" id="L213"> <span class="tok-kw">for</span> (palette) |col| {</span>
<span class="line" id="L214"> <span class="tok-kw">try</span> chunk_wr.writeByte(col.a);</span>
<span class="line" id="L215"> }</span>
<span class="line" id="L216"></span>
<span class="line" id="L217"> <span class="tok-kw">try</span> chunk.flush();</span>
<span class="line" id="L218"> }</span>
<span class="line" id="L219">};</span>
<span class="line" id="L220"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> io = std.io;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> mem = std.mem;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> Crc = std.hash.crc.Crc32WithPoly(.IEEE);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-comment">/// Writer based on buffered writer that will write whole chunks of data of [buffer size]</span></span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ChunkWriter</span>(<span class="tok-kw">comptime</span> buffer_size: <span class="tok-type">usize</span>, <span class="tok-kw">comptime</span> WriterType: <span class="tok-type">type</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L10"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L11"> unbuffered_writer: WriterType,</span>
<span class="line" id="L12"> buf: [buffer_size]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L13"> end: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L14"> section_id: [<span class="tok-number">4</span>]<span class="tok-type">u8</span>,</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Error = WriterType.Error;</span>
<span class="line" id="L17"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Writer = io.Writer(*Self, Error, write);</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">flush</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L22"> <span class="tok-kw">try</span> self.unbuffered_writer.writeInt(<span class="tok-type">u32</span>, <span class="tok-builtin">@as</span>(<span class="tok-type">u32</span>, <span class="tok-builtin">@truncate</span>(self.end)), .big);</span>
<span class="line" id="L23"></span>
<span class="line" id="L24"> <span class="tok-kw">var</span> crc = Crc.init();</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"> crc.update(&amp;self.section_id);</span>
<span class="line" id="L27"> <span class="tok-kw">try</span> self.unbuffered_writer.writeAll(&amp;self.section_id);</span>
<span class="line" id="L28"> crc.update(self.buf[<span class="tok-number">0</span>..self.end]);</span>
<span class="line" id="L29"> <span class="tok-kw">try</span> self.unbuffered_writer.writeAll(self.buf[<span class="tok-number">0</span>..self.end]);</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"> <span class="tok-kw">try</span> self.unbuffered_writer.writeInt(<span class="tok-type">u32</span>, crc.final(), .big);</span>
<span class="line" id="L32"></span>
<span class="line" id="L33"> self.end = <span class="tok-number">0</span>;</span>
<span class="line" id="L34"> }</span>
<span class="line" id="L35"></span>
<span class="line" id="L36"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writer</span>(self: *Self) Writer {</span>
<span class="line" id="L37"> <span class="tok-kw">return</span> .{ .context = self };</span>
<span class="line" id="L38"> }</span>
<span class="line" id="L39"></span>
<span class="line" id="L40"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: *Self, bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) Error!<span class="tok-type">usize</span> {</span>
<span class="line" id="L41"> <span class="tok-kw">if</span> (self.end + bytes.len &gt; self.buf.len) {</span>
<span class="line" id="L42"> <span class="tok-kw">try</span> self.flush();</span>
<span class="line" id="L43"> <span class="tok-kw">if</span> (bytes.len &gt; self.buf.len)</span>
<span class="line" id="L44"> <span class="tok-kw">return</span> self.unbuffered_writer.write(bytes);</span>
<span class="line" id="L45"> }</span>
<span class="line" id="L46"></span>
<span class="line" id="L47"> <span class="tok-builtin">@memcpy</span>(self.buf[self.end..][<span class="tok-number">0</span>..bytes.len], bytes);</span>
<span class="line" id="L48"> self.end += bytes.len;</span>
<span class="line" id="L49"> <span class="tok-kw">return</span> bytes.len;</span>
<span class="line" id="L50"> }</span>
<span class="line" id="L51"> };</span>
<span class="line" id="L52">}</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"><span class="tok-kw">const</span> ChunkBufferSize = <span class="tok-number">1</span> &lt;&lt; <span class="tok-number">14</span>; <span class="tok-comment">// 16 kb</span>
</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">chunkWriter</span>(underlying_stream: <span class="tok-kw">anytype</span>, <span class="tok-kw">comptime</span> id: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ChunkWriter(ChunkBufferSize, <span class="tok-builtin">@TypeOf</span>(underlying_stream)) {</span>
<span class="line" id="L57"> <span class="tok-kw">if</span> (id.len != <span class="tok-number">4</span>)</span>
<span class="line" id="L58"> <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;PNG chunk id must be 4 characters&quot;</span>);</span>
<span class="line" id="L59"></span>
<span class="line" id="L60"> <span class="tok-kw">return</span> .{ .unbuffered_writer = underlying_stream, .section_id = std.mem.bytesToValue([<span class="tok-number">4</span>]<span class="tok-type">u8</span>, id[<span class="tok-number">0</span>..<span class="tok-number">4</span>]) };</span>
<span class="line" id="L61">}</span>
<span class="line" id="L62"></span>
<span class="line" id="L63"><span class="tok-comment">// TODO: test idat writer</span>
</span>
<span class="line" id="L64"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../color.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../Image.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> HeaderData = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;types.zig&quot;</span>).HeaderData;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> builtin = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;builtin&quot;</span>);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterType = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L9"> none = <span class="tok-number">0</span>,</span>
<span class="line" id="L10"> sub = <span class="tok-number">1</span>,</span>
<span class="line" id="L11"> up = <span class="tok-number">2</span>,</span>
<span class="line" id="L12"> average = <span class="tok-number">3</span>,</span>
<span class="line" id="L13"> paeth = <span class="tok-number">4</span>,</span>
<span class="line" id="L14">};</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterChoiceStrategies = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L17"> try_all,</span>
<span class="line" id="L18"> heuristic,</span>
<span class="line" id="L19"> specified,</span>
<span class="line" id="L20">};</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterChoice = <span class="tok-kw">union</span>(FilterChoiceStrategies) {</span>
<span class="line" id="L23"> try_all,</span>
<span class="line" id="L24"> heuristic,</span>
<span class="line" id="L25"> specified: FilterType,</span>
<span class="line" id="L26">};</span>
<span class="line" id="L27"></span>
<span class="line" id="L28"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">filter</span>(writer: <span class="tok-kw">anytype</span>, pixels: color.PixelStorage, filter_choice: FilterChoice, header: HeaderData) Image.WriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L29"> <span class="tok-kw">var</span> scanline: color.PixelStorage = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L30"> <span class="tok-kw">var</span> previous_scanline: ?color.PixelStorage = <span class="tok-null">null</span>;</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"> <span class="tok-kw">const</span> format: PixelFormat = pixels;</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"> <span class="tok-kw">if</span> (format.bitsPerChannel() &lt; <span class="tok-number">8</span>)</span>
<span class="line" id="L35"> <span class="tok-kw">return</span> Image.WriteError.Unsupported;</span>
<span class="line" id="L36"></span>
<span class="line" id="L37"> <span class="tok-kw">const</span> pixel_len = format.pixelStride();</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"> <span class="tok-kw">var</span> y: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L40"> <span class="tok-kw">while</span> (y &lt; header.height) : (y += <span class="tok-number">1</span>) {</span>
<span class="line" id="L41"> scanline = pixels.slice(y * header.width, (y + <span class="tok-number">1</span>) * header.width);</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"> <span class="tok-kw">const</span> filter_type: FilterType = <span class="tok-kw">switch</span> (filter_choice) {</span>
<span class="line" id="L44"> .try_all =&gt; <span class="tok-builtin">@panic</span>(<span class="tok-str">&quot;Unimplemented&quot;</span>),</span>
<span class="line" id="L45"> .heuristic =&gt; filterChoiceHeuristic(scanline, previous_scanline),</span>
<span class="line" id="L46"> .specified =&gt; |f| f,</span>
<span class="line" id="L47"> };</span>
<span class="line" id="L48"></span>
<span class="line" id="L49"> <span class="tok-kw">try</span> writer.writeByte(<span class="tok-builtin">@intFromEnum</span>(filter_type));</span>
<span class="line" id="L50"></span>
<span class="line" id="L51"> <span class="tok-kw">for</span> (<span class="tok-number">0</span>..scanline.asBytes().len) |byte_index| {</span>
<span class="line" id="L52"> <span class="tok-kw">const</span> i = <span class="tok-kw">if</span> (builtin.target.cpu.arch.endian() == .little) pixelByteSwappedIndex(scanline, byte_index) <span class="tok-kw">else</span> byte_index;</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-kw">const</span> sample = scanline.asBytes()[i];</span>
<span class="line" id="L55"> <span class="tok-kw">const</span> previous: <span class="tok-type">u8</span> = <span class="tok-kw">if</span> (byte_index &gt;= pixel_len) scanline.asBytes()[i - pixel_len] <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L56"> <span class="tok-kw">const</span> above: <span class="tok-type">u8</span> = <span class="tok-kw">if</span> (previous_scanline) |b| b.asBytes()[i] <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L57"> <span class="tok-kw">const</span> above_previous = <span class="tok-kw">if</span> (previous_scanline) |b| (<span class="tok-kw">if</span> (byte_index &gt;= pixel_len) b.asBytes()[i - pixel_len] <span class="tok-kw">else</span> <span class="tok-number">0</span>) <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L58"></span>
<span class="line" id="L59"> <span class="tok-kw">const</span> byte: <span class="tok-type">u8</span> = <span class="tok-kw">switch</span> (filter_type) {</span>
<span class="line" id="L60"> .none =&gt; sample,</span>
<span class="line" id="L61"> .sub =&gt; sample -% previous,</span>
<span class="line" id="L62"> .up =&gt; sample -% above,</span>
<span class="line" id="L63"> .average =&gt; sample -% average(previous, above),</span>
<span class="line" id="L64"> .paeth =&gt; sample -% paeth(previous, above, above_previous),</span>
<span class="line" id="L65"> };</span>
<span class="line" id="L66"></span>
<span class="line" id="L67"> <span class="tok-kw">try</span> writer.writeByte(byte);</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"> previous_scanline = scanline;</span>
<span class="line" id="L70"> }</span>
<span class="line" id="L71">}</span>
<span class="line" id="L72"></span>
<span class="line" id="L73"><span class="tok-comment">// Map the index of a byte to what it would be if each struct element was byte swapped</span>
</span>
<span class="line" id="L74"><span class="tok-kw">fn</span> <span class="tok-fn">pixelByteSwappedIndex</span>(storage: color.PixelStorage, index: <span class="tok-type">usize</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L75"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (storage) {</span>
<span class="line" id="L76"> .invalid =&gt; index,</span>
<span class="line" id="L77"> <span class="tok-kw">inline</span> .indexed1, .indexed2, .indexed4, .indexed8, .indexed16 =&gt; |data| byteSwappedIndex(<span class="tok-builtin">@typeInfo</span>(<span class="tok-builtin">@TypeOf</span>(data.indices)).Pointer.child, index),</span>
<span class="line" id="L78"> <span class="tok-kw">inline</span> <span class="tok-kw">else</span> =&gt; |data| byteSwappedIndex(<span class="tok-builtin">@typeInfo</span>(<span class="tok-builtin">@TypeOf</span>(data)).Pointer.child, index),</span>
<span class="line" id="L79"> };</span>
<span class="line" id="L80">}</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"><span class="tok-comment">// Map the index of a byte to what it would be if each struct element was byte swapped</span>
</span>
<span class="line" id="L83"><span class="tok-kw">fn</span> <span class="tok-fn">byteSwappedIndex</span>(<span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>, byte_index: <span class="tok-type">usize</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L84"> <span class="tok-kw">const</span> element_index = byte_index / <span class="tok-builtin">@sizeOf</span>(T);</span>
<span class="line" id="L85"> <span class="tok-kw">const</span> element_offset = element_index * <span class="tok-builtin">@sizeOf</span>(T);</span>
<span class="line" id="L86"> <span class="tok-kw">const</span> index = byte_index % <span class="tok-builtin">@sizeOf</span>(T);</span>
<span class="line" id="L87"> <span class="tok-kw">switch</span> (<span class="tok-builtin">@typeInfo</span>(T)) {</span>
<span class="line" id="L88"> .Int =&gt; {</span>
<span class="line" id="L89"> <span class="tok-kw">if</span> (<span class="tok-builtin">@sizeOf</span>(T) == <span class="tok-number">1</span>) <span class="tok-kw">return</span> byte_index;</span>
<span class="line" id="L90"> <span class="tok-kw">return</span> element_offset + <span class="tok-builtin">@sizeOf</span>(T) - <span class="tok-number">1</span> - index;</span>
<span class="line" id="L91"> },</span>
<span class="line" id="L92"> .Struct =&gt; |info| {</span>
<span class="line" id="L93"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (info.fields) |field| {</span>
<span class="line" id="L94"> <span class="tok-kw">if</span> (index &gt;= <span class="tok-builtin">@offsetOf</span>(T, field.name) <span class="tok-kw">or</span> index &lt;= <span class="tok-builtin">@offsetOf</span>(T, field.name) + <span class="tok-builtin">@sizeOf</span>(field.<span class="tok-type">type</span>)) {</span>
<span class="line" id="L95"> <span class="tok-kw">if</span> (<span class="tok-builtin">@sizeOf</span>(field.<span class="tok-type">type</span>) == <span class="tok-number">1</span>) <span class="tok-kw">return</span> byte_index;</span>
<span class="line" id="L96"> <span class="tok-kw">return</span> element_offset + <span class="tok-builtin">@sizeOf</span>(field.<span class="tok-type">type</span>) - <span class="tok-number">1</span> - index;</span>
<span class="line" id="L97"> }</span>
<span class="line" id="L98"> }</span>
<span class="line" id="L99"> },</span>
<span class="line" id="L100"> <span class="tok-kw">else</span> =&gt; <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;type &quot;</span> ++ <span class="tok-builtin">@typeName</span>(T) ++ <span class="tok-str">&quot; not supported&quot;</span>),</span>
<span class="line" id="L101"> }</span>
<span class="line" id="L102">}</span>
<span class="line" id="L103"></span>
<span class="line" id="L104"><span class="tok-kw">fn</span> <span class="tok-fn">filterChoiceHeuristic</span>(scanline: color.PixelStorage, previous_scanline: ?color.PixelStorage) FilterType {</span>
<span class="line" id="L105"> <span class="tok-kw">const</span> pixel_len = <span class="tok-builtin">@as</span>(PixelFormat, scanline).pixelStride();</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"> <span class="tok-kw">const</span> filter_types = [_]FilterType{ .none, .sub, .up, .average, .paeth };</span>
<span class="line" id="L108"></span>
<span class="line" id="L109"> <span class="tok-kw">var</span> previous_bytes: [filter_types.len]<span class="tok-type">u8</span> = [_]<span class="tok-type">u8</span>{<span class="tok-number">0</span>} ** filter_types.len;</span>
<span class="line" id="L110"> <span class="tok-kw">var</span> combos: [filter_types.len]<span class="tok-type">usize</span> = [_]<span class="tok-type">usize</span>{<span class="tok-number">0</span>} ** filter_types.len;</span>
<span class="line" id="L111"> <span class="tok-kw">var</span> scores: [filter_types.len]<span class="tok-type">usize</span> = [_]<span class="tok-type">usize</span>{<span class="tok-number">0</span>} ** filter_types.len;</span>
<span class="line" id="L112"></span>
<span class="line" id="L113"> <span class="tok-kw">for</span> (scanline.asBytes(), <span class="tok-number">0</span>..) |sample, i| {</span>
<span class="line" id="L114"> <span class="tok-kw">const</span> previous: <span class="tok-type">u8</span> = <span class="tok-kw">if</span> (i &gt;= pixel_len) scanline.asBytes()[i - pixel_len] <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L115"> <span class="tok-kw">const</span> above: <span class="tok-type">u8</span> = <span class="tok-kw">if</span> (previous_scanline) |b| b.asBytes()[i] <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L116"> <span class="tok-kw">const</span> above_previous = <span class="tok-kw">if</span> (previous_scanline) |b| (<span class="tok-kw">if</span> (i &gt;= pixel_len) b.asBytes()[i - pixel_len] <span class="tok-kw">else</span> <span class="tok-number">0</span>) <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (filter_types, &amp;previous_bytes, &amp;combos, &amp;scores) |filter_type, *previous_byte, *combo, *score| {</span>
<span class="line" id="L119"> <span class="tok-kw">const</span> byte: <span class="tok-type">u8</span> = <span class="tok-kw">switch</span> (filter_type) {</span>
<span class="line" id="L120"> .none =&gt; sample,</span>
<span class="line" id="L121"> .sub =&gt; sample -% previous,</span>
<span class="line" id="L122"> .up =&gt; sample -% above,</span>
<span class="line" id="L123"> .average =&gt; sample -% average(previous, above),</span>
<span class="line" id="L124"> .paeth =&gt; sample -% paeth(previous, above, above_previous),</span>
<span class="line" id="L125"> };</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (byte == previous_byte.*) {</span>
<span class="line" id="L128"> combo.* += <span class="tok-number">1</span>;</span>
<span class="line" id="L129"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L130"> score.* += combo.* * combo.*;</span>
<span class="line" id="L131"> combo.* = <span class="tok-number">0</span>;</span>
<span class="line" id="L132"> previous_byte.* = byte;</span>
<span class="line" id="L133"> }</span>
<span class="line" id="L134"> }</span>
<span class="line" id="L135"> }</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"> <span class="tok-kw">var</span> best: FilterType = .none;</span>
<span class="line" id="L138"> <span class="tok-kw">var</span> max_score: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L139"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (filter_types, scores) |filter_type, score| {</span>
<span class="line" id="L140"> <span class="tok-kw">if</span> (score &gt; max_score) {</span>
<span class="line" id="L141"> max_score = score;</span>
<span class="line" id="L142"> best = filter_type;</span>
<span class="line" id="L143"> }</span>
<span class="line" id="L144"> }</span>
<span class="line" id="L145"> <span class="tok-kw">return</span> best;</span>
<span class="line" id="L146">}</span>
<span class="line" id="L147"></span>
<span class="line" id="L148"><span class="tok-kw">fn</span> <span class="tok-fn">average</span>(a: <span class="tok-type">u9</span>, b: <span class="tok-type">u9</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L149"> <span class="tok-kw">return</span> <span class="tok-builtin">@truncate</span>((a + b) / <span class="tok-number">2</span>);</span>
<span class="line" id="L150">}</span>
<span class="line" id="L151"></span>
<span class="line" id="L152"><span class="tok-kw">fn</span> <span class="tok-fn">paeth</span>(b4: <span class="tok-type">u8</span>, up: <span class="tok-type">u8</span>, b4_up: <span class="tok-type">u8</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L153"> <span class="tok-kw">const</span> p: <span class="tok-type">i16</span> = <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, <span class="tok-builtin">@intCast</span>(b4)) + up - b4_up;</span>
<span class="line" id="L154"> <span class="tok-kw">const</span> pa = <span class="tok-builtin">@abs</span>(p - b4);</span>
<span class="line" id="L155"> <span class="tok-kw">const</span> pb = <span class="tok-builtin">@abs</span>(p - up);</span>
<span class="line" id="L156"> <span class="tok-kw">const</span> pc = <span class="tok-builtin">@abs</span>(p - b4_up);</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"> <span class="tok-kw">if</span> (pa &lt;= pb <span class="tok-kw">and</span> pa &lt;= pc) {</span>
<span class="line" id="L159"> <span class="tok-kw">return</span> b4;</span>
<span class="line" id="L160"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (pb &lt;= pc) {</span>
<span class="line" id="L161"> <span class="tok-kw">return</span> up;</span>
<span class="line" id="L162"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L163"> <span class="tok-kw">return</span> b4_up;</span>
<span class="line" id="L164"> }</span>
<span class="line" id="L165">}</span>
<span class="line" id="L166"></span>
<span class="line" id="L167"><span class="tok-kw">test</span> <span class="tok-str">&quot;filtering 16-bit grayscale pixels uses correct endianess&quot;</span> {</span>
<span class="line" id="L168"> <span class="tok-kw">var</span> output_bytes = std.ArrayList(<span class="tok-type">u8</span>).init(std.testing.allocator);</span>
<span class="line" id="L169"> <span class="tok-kw">defer</span> output_bytes.deinit();</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> <span class="tok-kw">const</span> pixels = <span class="tok-kw">try</span> std.testing.allocator.dupe(color.Grayscale16, &amp;.{</span>
<span class="line" id="L172"> .{ .value = <span class="tok-number">0xF</span> },</span>
<span class="line" id="L173"> .{ .value = <span class="tok-number">0xFF</span> },</span>
<span class="line" id="L174"> .{ .value = <span class="tok-number">0xFFF</span> },</span>
<span class="line" id="L175"> .{ .value = <span class="tok-number">0xFFFF</span> },</span>
<span class="line" id="L176"> .{ .value = <span class="tok-number">0xF</span> },</span>
<span class="line" id="L177"> .{ .value = <span class="tok-number">0xFF</span> },</span>
<span class="line" id="L178"> .{ .value = <span class="tok-number">0xFFF</span> },</span>
<span class="line" id="L179"> .{ .value = <span class="tok-number">0xFFFF</span> },</span>
<span class="line" id="L180"> });</span>
<span class="line" id="L181"> <span class="tok-kw">defer</span> std.testing.allocator.free(pixels);</span>
<span class="line" id="L182"></span>
<span class="line" id="L183"> <span class="tok-comment">// We specify the endianess as none to simplify the test</span>
</span>
<span class="line" id="L184"> <span class="tok-kw">try</span> filter(output_bytes.writer(), .{ .grayscale16 = pixels }, .{ .specified = .none }, .{</span>
<span class="line" id="L185"> .width = <span class="tok-number">4</span>,</span>
<span class="line" id="L186"> .height = <span class="tok-number">2</span>,</span>
<span class="line" id="L187"> .bit_depth = <span class="tok-number">16</span>,</span>
<span class="line" id="L188"> .color_type = .grayscale,</span>
<span class="line" id="L189"> .compression_method = .deflate,</span>
<span class="line" id="L190"> .filter_method = .adaptive,</span>
<span class="line" id="L191"> .interlace_method = .none,</span>
<span class="line" id="L192"> });</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, &amp;.{</span>
<span class="line" id="L195"> <span class="tok-number">0x00</span>, <span class="tok-number">0x00</span>, <span class="tok-number">0x0F</span>, <span class="tok-number">0x00</span>, <span class="tok-number">0xFF</span>, <span class="tok-number">0x0F</span>, <span class="tok-number">0xFF</span>, <span class="tok-number">0xFF</span>, <span class="tok-number">0xFF</span>, <span class="tok-comment">//</span>
</span>
<span class="line" id="L196"> <span class="tok-number">0x00</span>, <span class="tok-number">0x00</span>, <span class="tok-number">0x0F</span>, <span class="tok-number">0x00</span>, <span class="tok-number">0xFF</span>, <span class="tok-number">0x0F</span>, <span class="tok-number">0xFF</span>, <span class="tok-number">0xFF</span>, <span class="tok-number">0xFF</span>, <span class="tok-comment">//</span>
</span>
<span class="line" id="L197"> }, output_bytes.items);</span>
<span class="line" id="L198">}</span>
<span class="line" id="L199"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../utils.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../color.zig&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L6"><span class="tok-kw">const</span> Colorf32 = color.Colorf32;</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> magic_header = <span class="tok-str">&quot;\x89PNG\x0D\x0A\x1A\x0A&quot;</span>;</span>
<span class="line" id="L9"></span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Chunk = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L11"> id: <span class="tok-type">u32</span>,</span>
<span class="line" id="L12"> name: *<span class="tok-kw">const</span> [<span class="tok-number">4</span>:<span class="tok-number">0</span>]<span class="tok-type">u8</span>,</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(name: *<span class="tok-kw">const</span> [<span class="tok-number">4</span>:<span class="tok-number">0</span>]<span class="tok-type">u8</span>) Chunk {</span>
<span class="line" id="L15"> <span class="tok-kw">return</span> .{ .name = name, .id = std.mem.bigToNative(<span class="tok-type">u32</span>, std.mem.bytesToValue(<span class="tok-type">u32</span>, name)) };</span>
<span class="line" id="L16"> }</span>
<span class="line" id="L17">};</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Chunks = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L20"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> IHDR = Chunk.init(<span class="tok-str">&quot;IHDR&quot;</span>);</span>
<span class="line" id="L21"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> PLTE = Chunk.init(<span class="tok-str">&quot;PLTE&quot;</span>);</span>
<span class="line" id="L22"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> IDAT = Chunk.init(<span class="tok-str">&quot;IDAT&quot;</span>);</span>
<span class="line" id="L23"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> IEND = Chunk.init(<span class="tok-str">&quot;IEND&quot;</span>);</span>
<span class="line" id="L24"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> gAMA = Chunk.init(<span class="tok-str">&quot;gAMA&quot;</span>);</span>
<span class="line" id="L25"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> sBIT = Chunk.init(<span class="tok-str">&quot;sBIT&quot;</span>);</span>
<span class="line" id="L26"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> tEXt = Chunk.init(<span class="tok-str">&quot;tEXt&quot;</span>);</span>
<span class="line" id="L27"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> zTXt = Chunk.init(<span class="tok-str">&quot;zTXt&quot;</span>);</span>
<span class="line" id="L28"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> iTXt = Chunk.init(<span class="tok-str">&quot;iTXt&quot;</span>);</span>
<span class="line" id="L29"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> cHRM = Chunk.init(<span class="tok-str">&quot;cHRM&quot;</span>);</span>
<span class="line" id="L30"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> pHYs = Chunk.init(<span class="tok-str">&quot;pHYs&quot;</span>);</span>
<span class="line" id="L31"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> tRNS = Chunk.init(<span class="tok-str">&quot;tRNS&quot;</span>);</span>
<span class="line" id="L32"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> bKGD = Chunk.init(<span class="tok-str">&quot;bKGD&quot;</span>);</span>
<span class="line" id="L33"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> tIME = Chunk.init(<span class="tok-str">&quot;tIME&quot;</span>);</span>
<span class="line" id="L34"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> iCCP = Chunk.init(<span class="tok-str">&quot;iCCP&quot;</span>);</span>
<span class="line" id="L35"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> sRGB = Chunk.init(<span class="tok-str">&quot;sRGB&quot;</span>);</span>
<span class="line" id="L36"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Any = Chunk.init(<span class="tok-str">&quot;_ANY&quot;</span>);</span>
<span class="line" id="L37">};</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ColorType = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L40"> grayscale = <span class="tok-number">0</span>,</span>
<span class="line" id="L41"> rgb_color = <span class="tok-number">2</span>,</span>
<span class="line" id="L42"> indexed = <span class="tok-number">3</span>,</span>
<span class="line" id="L43"> grayscale_alpha = <span class="tok-number">4</span>,</span>
<span class="line" id="L44"> rgba_color = <span class="tok-number">6</span>,</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L47"></span>
<span class="line" id="L48"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">channelCount</span>(self: Self) <span class="tok-type">u8</span> {</span>
<span class="line" id="L49"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self) {</span>
<span class="line" id="L50"> .grayscale =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L51"> .rgb_color =&gt; <span class="tok-number">3</span>,</span>
<span class="line" id="L52"> .indexed =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L53"> .grayscale_alpha =&gt; <span class="tok-number">2</span>,</span>
<span class="line" id="L54"> .rgba_color =&gt; <span class="tok-number">4</span>,</span>
<span class="line" id="L55"> };</span>
<span class="line" id="L56"> }</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">fromPixelFormat</span>(pixel_format: PixelFormat) !Self {</span>
<span class="line" id="L59"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (pixel_format) {</span>
<span class="line" id="L60"> .rgb24, .rgb48 =&gt; .rgb_color,</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"> .rgba32, .rgba64 =&gt; .rgba_color,</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> .grayscale1, .grayscale2, .grayscale4, .grayscale8, .grayscale16 =&gt; .grayscale,</span>
<span class="line" id="L65"></span>
<span class="line" id="L66"> .grayscale8Alpha, .grayscale16Alpha =&gt; .grayscale_alpha,</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> .indexed1, .indexed2, .indexed4, .indexed8 =&gt; .indexed,</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> <span class="tok-kw">error</span>.Unsupported,</span>
<span class="line" id="L71"> };</span>
<span class="line" id="L72"> }</span>
<span class="line" id="L73">};</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterType = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L76"> none = <span class="tok-number">0</span>,</span>
<span class="line" id="L77"> sub = <span class="tok-number">1</span>,</span>
<span class="line" id="L78"> up = <span class="tok-number">2</span>,</span>
<span class="line" id="L79"> average = <span class="tok-number">3</span>,</span>
<span class="line" id="L80"> paeth = <span class="tok-number">4</span>,</span>
<span class="line" id="L81">};</span>
<span class="line" id="L82"></span>
<span class="line" id="L83"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> InterlaceMethod = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L84"> none = <span class="tok-number">0</span>,</span>
<span class="line" id="L85"> adam7 = <span class="tok-number">1</span>,</span>
<span class="line" id="L86">};</span>
<span class="line" id="L87"></span>
<span class="line" id="L88"><span class="tok-comment">/// The compression methods supported by PNG</span></span>
<span class="line" id="L89"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CompressionMethod = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) { deflate = <span class="tok-number">0</span>, _ };</span>
<span class="line" id="L90"></span>
<span class="line" id="L91"><span class="tok-comment">/// The filter methods supported by PNG</span></span>
<span class="line" id="L92"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FilterMethod = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) { adaptive = <span class="tok-number">0</span>, _ };</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ChunkHeader = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L95"> length: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L96"> <span class="tok-type">type</span>: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L97"></span>
<span class="line" id="L98"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L99"></span>
<span class="line" id="L100"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">name</span>(self: *Self) []<span class="tok-kw">const</span> <span class="tok-type">u8</span> {</span>
<span class="line" id="L101"> <span class="tok-kw">return</span> std.mem.asBytes(&amp;self.<span class="tok-type">type</span>);</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103">};</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> HeaderData = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L106"> width: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L107"> height: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L108"> bit_depth: <span class="tok-type">u8</span>,</span>
<span class="line" id="L109"> color_type: ColorType,</span>
<span class="line" id="L110"> compression_method: CompressionMethod,</span>
<span class="line" id="L111"> filter_method: FilterMethod,</span>
<span class="line" id="L112"> interlace_method: InterlaceMethod,</span>
<span class="line" id="L113"></span>
<span class="line" id="L114"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isValid</span>(self: *<span class="tok-kw">const</span> Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L117"> <span class="tok-kw">const</span> max_dim = std.math.maxInt(<span class="tok-type">u32</span>) &gt;&gt; <span class="tok-number">1</span>;</span>
<span class="line" id="L118"> <span class="tok-kw">const</span> w = self.width;</span>
<span class="line" id="L119"> <span class="tok-kw">const</span> h = self.height;</span>
<span class="line" id="L120"> <span class="tok-kw">if</span> (w == <span class="tok-number">0</span> <span class="tok-kw">or</span> w &gt; max_dim) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L121"> <span class="tok-kw">if</span> (h == <span class="tok-number">0</span> <span class="tok-kw">or</span> h &gt; max_dim) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"> <span class="tok-kw">const</span> bd = self.bit_depth;</span>
<span class="line" id="L124"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.color_type) {</span>
<span class="line" id="L125"> .grayscale =&gt; bd == <span class="tok-number">1</span> <span class="tok-kw">or</span> bd == <span class="tok-number">2</span> <span class="tok-kw">or</span> bd == <span class="tok-number">4</span> <span class="tok-kw">or</span> bd == <span class="tok-number">8</span> <span class="tok-kw">or</span> bd == <span class="tok-number">16</span>,</span>
<span class="line" id="L126"> .indexed =&gt; bd == <span class="tok-number">1</span> <span class="tok-kw">or</span> bd == <span class="tok-number">2</span> <span class="tok-kw">or</span> bd == <span class="tok-number">4</span> <span class="tok-kw">or</span> bd == <span class="tok-number">8</span>,</span>
<span class="line" id="L127"> <span class="tok-kw">else</span> =&gt; bd == <span class="tok-number">8</span> <span class="tok-kw">or</span> bd == <span class="tok-number">16</span>,</span>
<span class="line" id="L128"> };</span>
<span class="line" id="L129"> }</span>
<span class="line" id="L130"></span>
<span class="line" id="L131"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">allowsPalette</span>(self: *<span class="tok-kw">const</span> Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L132"> <span class="tok-kw">return</span> self.color_type == .indexed <span class="tok-kw">or</span></span>
<span class="line" id="L133"> self.color_type == .rgb_color <span class="tok-kw">or</span></span>
<span class="line" id="L134"> self.color_type == .rgba_color;</span>
<span class="line" id="L135"> }</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">maxPaletteSize</span>(self: *<span class="tok-kw">const</span> Self) <span class="tok-type">u16</span> {</span>
<span class="line" id="L138"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (self.bit_depth &gt; <span class="tok-number">8</span>) <span class="tok-number">256</span> <span class="tok-kw">else</span> <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">1</span>) &lt;&lt; <span class="tok-builtin">@truncate</span>(self.bit_depth);</span>
<span class="line" id="L139"> }</span>
<span class="line" id="L140"></span>
<span class="line" id="L141"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">channelCount</span>(self: *<span class="tok-kw">const</span> Self) <span class="tok-type">u8</span> {</span>
<span class="line" id="L142"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.color_type) {</span>
<span class="line" id="L143"> .grayscale =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L144"> .rgb_color =&gt; <span class="tok-number">3</span>,</span>
<span class="line" id="L145"> .indexed =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L146"> .grayscale_alpha =&gt; <span class="tok-number">2</span>,</span>
<span class="line" id="L147"> .rgba_color =&gt; <span class="tok-number">4</span>,</span>
<span class="line" id="L148"> };</span>
<span class="line" id="L149"> }</span>
<span class="line" id="L150"></span>
<span class="line" id="L151"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelBits</span>(self: *<span class="tok-kw">const</span> Self) <span class="tok-type">u8</span> {</span>
<span class="line" id="L152"> <span class="tok-kw">return</span> self.bit_depth * self.channelCount();</span>
<span class="line" id="L153"> }</span>
<span class="line" id="L154"></span>
<span class="line" id="L155"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">lineBytes</span>(self: *<span class="tok-kw">const</span> Self) <span class="tok-type">u32</span> {</span>
<span class="line" id="L156"> <span class="tok-kw">return</span> (self.pixelBits() * self.width + <span class="tok-number">7</span>) / <span class="tok-number">8</span>;</span>
<span class="line" id="L157"> }</span>
<span class="line" id="L158"></span>
<span class="line" id="L159"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getPixelFormat</span>(self: *<span class="tok-kw">const</span> Self) PixelFormat {</span>
<span class="line" id="L160"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.color_type) {</span>
<span class="line" id="L161"> .grayscale =&gt; <span class="tok-kw">switch</span> (self.bit_depth) {</span>
<span class="line" id="L162"> <span class="tok-number">1</span> =&gt; PixelFormat.grayscale1,</span>
<span class="line" id="L163"> <span class="tok-number">2</span> =&gt; PixelFormat.grayscale2,</span>
<span class="line" id="L164"> <span class="tok-number">4</span> =&gt; PixelFormat.grayscale4,</span>
<span class="line" id="L165"> <span class="tok-number">8</span> =&gt; PixelFormat.grayscale8,</span>
<span class="line" id="L166"> <span class="tok-number">16</span> =&gt; PixelFormat.grayscale16,</span>
<span class="line" id="L167"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L168"> },</span>
<span class="line" id="L169"> .rgb_color =&gt; <span class="tok-kw">switch</span> (self.bit_depth) {</span>
<span class="line" id="L170"> <span class="tok-number">8</span> =&gt; PixelFormat.rgb24,</span>
<span class="line" id="L171"> <span class="tok-number">16</span> =&gt; PixelFormat.rgb48,</span>
<span class="line" id="L172"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L173"> },</span>
<span class="line" id="L174"> .indexed =&gt; <span class="tok-kw">switch</span> (self.bit_depth) {</span>
<span class="line" id="L175"> <span class="tok-number">1</span> =&gt; PixelFormat.indexed1,</span>
<span class="line" id="L176"> <span class="tok-number">2</span> =&gt; PixelFormat.indexed2,</span>
<span class="line" id="L177"> <span class="tok-number">4</span> =&gt; PixelFormat.indexed4,</span>
<span class="line" id="L178"> <span class="tok-number">8</span> =&gt; PixelFormat.indexed8,</span>
<span class="line" id="L179"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L180"> },</span>
<span class="line" id="L181"> .grayscale_alpha =&gt; <span class="tok-kw">switch</span> (self.bit_depth) {</span>
<span class="line" id="L182"> <span class="tok-number">8</span> =&gt; PixelFormat.grayscale8Alpha,</span>
<span class="line" id="L183"> <span class="tok-number">16</span> =&gt; PixelFormat.grayscale16Alpha,</span>
<span class="line" id="L184"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L185"> },</span>
<span class="line" id="L186"> .rgba_color =&gt; <span class="tok-kw">switch</span> (self.bit_depth) {</span>
<span class="line" id="L187"> <span class="tok-number">8</span> =&gt; PixelFormat.rgba32,</span>
<span class="line" id="L188"> <span class="tok-number">16</span> =&gt; PixelFormat.rgba64,</span>
<span class="line" id="L189"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L190"> },</span>
<span class="line" id="L191"> };</span>
<span class="line" id="L192"> }</span>
<span class="line" id="L193">};</span>
<span class="line" id="L194"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> io = std.io;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> deflate = std.compress.deflate;</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-comment">/// Zlib Compressor (Deflate) with a writer interface</span></span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ZlibCompressor</span>(<span class="tok-kw">comptime</span> WriterType: <span class="tok-type">type</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L7"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L8"> raw_writer: WriterType,</span>
<span class="line" id="L9"> compressor: deflate.Compressor(WriterType),</span>
<span class="line" id="L10"> adler: std.hash.Adler32,</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"> <span class="tok-comment">// TODO: find why doing it an other way segfaults</span>
</span>
<span class="line" id="L15"> <span class="tok-comment">/// Inits a zlibcompressor</span></span>
<span class="line" id="L16"> <span class="tok-comment">/// This is made this way because not doing it in place segfaults for a reason</span></span>
<span class="line" id="L17"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(self: *Self, alloc: std.mem.Allocator, stream: WriterType) !<span class="tok-type">void</span> {</span>
<span class="line" id="L18"> self.raw_writer = stream;</span>
<span class="line" id="L19"> self.compressor = <span class="tok-kw">try</span> deflate.compressor(alloc, self.raw_writer, .{});</span>
<span class="line" id="L20"> self.adler = std.hash.Adler32.init();</span>
<span class="line" id="L21"> }</span>
<span class="line" id="L22"></span>
<span class="line" id="L23"> <span class="tok-comment">/// Begins a zlib block with the header</span></span>
<span class="line" id="L24"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">begin</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L25"> <span class="tok-comment">// TODO: customize</span>
</span>
<span class="line" id="L26"> <span class="tok-kw">const</span> compression_method = <span class="tok-number">0x78</span>; <span class="tok-comment">// 8 = deflate, 7 = log(window size (see std.compress.deflate)) - 8</span>
</span>
<span class="line" id="L27"> <span class="tok-kw">const</span> compression_flags = blk: {</span>
<span class="line" id="L28"> <span class="tok-kw">var</span> ret: <span class="tok-type">u8</span> = <span class="tok-number">0b10000000</span>; <span class="tok-comment">// 11 = max compression</span>
</span>
<span class="line" id="L29"> <span class="tok-kw">const</span> rem: <span class="tok-type">u8</span> = <span class="tok-builtin">@truncate</span>(((<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-builtin">@intCast</span>(compression_method)) &lt;&lt; <span class="tok-number">8</span>) + ret) % <span class="tok-number">31</span>);</span>
<span class="line" id="L30"> ret += <span class="tok-number">31</span> - <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@truncate</span>(rem));</span>
<span class="line" id="L31"> <span class="tok-kw">break</span> :blk ret;</span>
<span class="line" id="L32"> };</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"> <span class="tok-comment">//std.debug.assert(((@intCast(usize, cmf) &lt;&lt; 8) + flg) % 31 == 0);</span>
</span>
<span class="line" id="L35"> <span class="tok-comment">// write the header</span>
</span>
<span class="line" id="L36"> <span class="tok-kw">var</span> wr = self.raw_writer;</span>
<span class="line" id="L37"> <span class="tok-kw">try</span> wr.writeByte(compression_method);</span>
<span class="line" id="L38"> <span class="tok-kw">try</span> wr.writeByte(compression_flags);</span>
<span class="line" id="L39"> }</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Error = WriterType.Error;</span>
<span class="line" id="L42"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> Writer = std.io.Writer(*Self, Error, write);</span>
<span class="line" id="L43"></span>
<span class="line" id="L44"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writer</span>(self: *Self) Writer {</span>
<span class="line" id="L45"> <span class="tok-kw">return</span> .{ .context = self };</span>
<span class="line" id="L46"> }</span>
<span class="line" id="L47"></span>
<span class="line" id="L48"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: *Self, bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) Error!<span class="tok-type">usize</span> {</span>
<span class="line" id="L49"> <span class="tok-kw">const</span> amount = <span class="tok-kw">try</span> self.compressor.writer().write(bytes);</span>
<span class="line" id="L50"> self.adler.update(bytes[<span class="tok-number">0</span>..amount]);</span>
<span class="line" id="L51"> <span class="tok-kw">return</span> amount;</span>
<span class="line" id="L52"> }</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-comment">/// Ends a zlib block with the checksum</span></span>
<span class="line" id="L55"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">end</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L56"> <span class="tok-kw">try</span> self.compressor.close();</span>
<span class="line" id="L57"> self.compressor.deinit();</span>
<span class="line" id="L58"> <span class="tok-comment">// Write the checksum</span>
</span>
<span class="line" id="L59"> <span class="tok-kw">try</span> self.raw_writer.writeInt(<span class="tok-type">u32</span>, self.adler.final(), .big);</span>
<span class="line" id="L60"> }</span>
<span class="line" id="L61"> };</span>
<span class="line" id="L62">}</span>
<span class="line" id="L63"></span>
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color: #ff894c;
}
.tok-comment {
color: #aa7;
}
.tok-fn {
color: #B1A0F8;
}
.tok-null {
color: #ff8080;
}
.tok-number {
color: #ff8080;
}
.tok-type {
color: #68f;
}
}
</style>
</head>
<body>
<pre><code><span class="line" id="L1"><span class="tok-comment">// Adapted from https://github.com/MasterQ32/zig-qoi</span>
</span>
<span class="line" id="L2"><span class="tok-comment">// with permission from Felix Queißner</span>
</span>
<span class="line" id="L3"><span class="tok-kw">const</span> Allocator = std.mem.Allocator;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> buffered_stream_source = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../buffered_stream_source.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../color.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> fs = std.fs;</span>
<span class="line" id="L8"><span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../Image.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> ImageError = Image.Error;</span>
<span class="line" id="L10"><span class="tok-kw">const</span> ImageReadError = Image.ReadError;</span>
<span class="line" id="L11"><span class="tok-kw">const</span> ImageWriteError = Image.WriteError;</span>
<span class="line" id="L12"><span class="tok-kw">const</span> io = std.io;</span>
<span class="line" id="L13"><span class="tok-kw">const</span> mem = std.mem;</span>
<span class="line" id="L14"><span class="tok-kw">const</span> path = std.fs.path;</span>
<span class="line" id="L15"><span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L16"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L17"><span class="tok-kw">const</span> utils = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../utils.zig&quot;</span>);</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> QoiColor = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L20"> r: <span class="tok-type">u8</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L21"> g: <span class="tok-type">u8</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L22"> b: <span class="tok-type">u8</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L23"> a: <span class="tok-type">u8</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>) = <span class="tok-number">0xFF</span>,</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"> <span class="tok-kw">fn</span> <span class="tok-fn">hash</span>(c: QoiColor) <span class="tok-type">u6</span> {</span>
<span class="line" id="L26"> <span class="tok-kw">return</span> <span class="tok-builtin">@truncate</span>(c.r *% <span class="tok-number">3</span> +% c.g *% <span class="tok-number">5</span> +% c.b *% <span class="tok-number">7</span> +% c.a *% <span class="tok-number">11</span>);</span>
<span class="line" id="L27"> }</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eql</span>(a: QoiColor, b: QoiColor) <span class="tok-type">bool</span> {</span>
<span class="line" id="L30"> <span class="tok-kw">return</span> std.meta.eql(a, b);</span>
<span class="line" id="L31"> }</span>
<span class="line" id="L32"></span>
<span class="line" id="L33"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toRgb24</span>(self: QoiColor) color.Rgb24 {</span>
<span class="line" id="L34"> <span class="tok-kw">return</span> color.Rgb24{</span>
<span class="line" id="L35"> .r = self.r,</span>
<span class="line" id="L36"> .g = self.g,</span>
<span class="line" id="L37"> .b = self.b,</span>
<span class="line" id="L38"> };</span>
<span class="line" id="L39"> }</span>
<span class="line" id="L40"></span>
<span class="line" id="L41"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toRgba32</span>(self: QoiColor) color.Rgba32 {</span>
<span class="line" id="L42"> <span class="tok-kw">return</span> color.Rgba32{</span>
<span class="line" id="L43"> .r = self.r,</span>
<span class="line" id="L44"> .g = self.g,</span>
<span class="line" id="L45"> .b = self.b,</span>
<span class="line" id="L46"> .a = self.a,</span>
<span class="line" id="L47"> };</span>
<span class="line" id="L48"> }</span>
<span class="line" id="L49"></span>
<span class="line" id="L50"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">from</span>(pixel: <span class="tok-kw">anytype</span>) QoiColor {</span>
<span class="line" id="L51"> <span class="tok-kw">if</span> (<span class="tok-builtin">@TypeOf</span>(pixel) == color.Rgb24) {</span>
<span class="line" id="L52"> <span class="tok-kw">return</span> QoiColor{</span>
<span class="line" id="L53"> .r = pixel.r,</span>
<span class="line" id="L54"> .g = pixel.g,</span>
<span class="line" id="L55"> .b = pixel.b,</span>
<span class="line" id="L56"> };</span>
<span class="line" id="L57"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (<span class="tok-builtin">@TypeOf</span>(pixel) == color.Rgba32) {</span>
<span class="line" id="L58"> <span class="tok-kw">return</span> QoiColor{</span>
<span class="line" id="L59"> .r = pixel.r,</span>
<span class="line" id="L60"> .g = pixel.g,</span>
<span class="line" id="L61"> .b = pixel.b,</span>
<span class="line" id="L62"> .a = pixel.a,</span>
<span class="line" id="L63"> };</span>
<span class="line" id="L64"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L65"> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L66"> }</span>
<span class="line" id="L67"> }</span>
<span class="line" id="L68">};</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Colorspace = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L71"> <span class="tok-comment">/// sRGB color, linear alpha</span></span>
<span class="line" id="L72"> srgb = <span class="tok-number">0</span>,</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"> <span class="tok-comment">/// Every channel is linear</span></span>
<span class="line" id="L75"> linear = <span class="tok-number">1</span>,</span>
<span class="line" id="L76">};</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Format = <span class="tok-kw">enum</span>(<span class="tok-type">u8</span>) {</span>
<span class="line" id="L79"> rgb = <span class="tok-number">3</span>,</span>
<span class="line" id="L80"> rgba = <span class="tok-number">4</span>,</span>
<span class="line" id="L81">};</span>
<span class="line" id="L82"></span>
<span class="line" id="L83"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Header = <span class="tok-kw">extern</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L84"> <span class="tok-kw">const</span> size = <span class="tok-number">14</span>;</span>
<span class="line" id="L85"> <span class="tok-kw">const</span> correct_magic = [<span class="tok-number">4</span>]<span class="tok-type">u8</span>{ <span class="tok-str">'q'</span>, <span class="tok-str">'o'</span>, <span class="tok-str">'i'</span>, <span class="tok-str">'f'</span> };</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> width: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L88"> height: <span class="tok-type">u32</span> <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L89"> format: Format <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L90"> colorspace: Colorspace <span class="tok-kw">align</span>(<span class="tok-number">1</span>),</span>
<span class="line" id="L91"></span>
<span class="line" id="L92"> <span class="tok-kw">fn</span> <span class="tok-fn">encode</span>(header: Header) [size]<span class="tok-type">u8</span> {</span>
<span class="line" id="L93"> <span class="tok-kw">var</span> result: [size]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L94"> <span class="tok-builtin">@memcpy</span>(result[<span class="tok-number">0</span>..<span class="tok-number">4</span>], &amp;correct_magic);</span>
<span class="line" id="L95"> std.mem.writeInt(<span class="tok-type">u32</span>, result[<span class="tok-number">4</span>..<span class="tok-number">8</span>], header.width, .big);</span>
<span class="line" id="L96"> std.mem.writeInt(<span class="tok-type">u32</span>, result[<span class="tok-number">8</span>..<span class="tok-number">12</span>], header.height, .big);</span>
<span class="line" id="L97"> result[<span class="tok-number">12</span>] = <span class="tok-builtin">@intFromEnum</span>(header.format);</span>
<span class="line" id="L98"> result[<span class="tok-number">13</span>] = <span class="tok-builtin">@intFromEnum</span>(header.colorspace);</span>
<span class="line" id="L99"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L100"> }</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">comptime</span> {</span>
<span class="line" id="L103"> std.debug.assert((<span class="tok-builtin">@sizeOf</span>(Header) + Header.correct_magic.len) == Header.size);</span>
<span class="line" id="L104"> }</span>
<span class="line" id="L105">};</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> QOI = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L108"> header: Header = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L109"></span>
<span class="line" id="L110"> <span class="tok-kw">pub</span> <span class="tok-kw">const</span> EncoderOptions = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L111"> colorspace: Colorspace = .srgb,</span>
<span class="line" id="L112"> };</span>
<span class="line" id="L113"></span>
<span class="line" id="L114"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatInterface</span>() FormatInterface {</span>
<span class="line" id="L117"> <span class="tok-kw">return</span> FormatInterface{</span>
<span class="line" id="L118"> .format = format,</span>
<span class="line" id="L119"> .formatDetect = formatDetect,</span>
<span class="line" id="L120"> .readImage = readImage,</span>
<span class="line" id="L121"> .writeImage = writeImage,</span>
<span class="line" id="L122"> };</span>
<span class="line" id="L123"> }</span>
<span class="line" id="L124"></span>
<span class="line" id="L125"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">format</span>() Image.Format {</span>
<span class="line" id="L126"> <span class="tok-kw">return</span> Image.Format.qoi;</span>
<span class="line" id="L127"> }</span>
<span class="line" id="L128"></span>
<span class="line" id="L129"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">formatDetect</span>(stream: *Image.Stream) ImageReadError!<span class="tok-type">bool</span> {</span>
<span class="line" id="L130"> <span class="tok-kw">var</span> magic_buffer: [Header.correct_magic.len]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"> _ = <span class="tok-kw">try</span> stream.read(magic_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L133"></span>
<span class="line" id="L134"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, magic_buffer[<span class="tok-number">0</span>..], Header.correct_magic[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L135"> }</span>
<span class="line" id="L136"></span>
<span class="line" id="L137"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readImage</span>(allocator: Allocator, stream: *Image.Stream) ImageReadError!Image {</span>
<span class="line" id="L138"> <span class="tok-kw">var</span> result = Image.init(allocator);</span>
<span class="line" id="L139"> <span class="tok-kw">errdefer</span> result.deinit();</span>
<span class="line" id="L140"> <span class="tok-kw">var</span> qoi = Self{};</span>
<span class="line" id="L141"></span>
<span class="line" id="L142"> <span class="tok-kw">const</span> pixels = <span class="tok-kw">try</span> qoi.read(allocator, stream);</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> result.width = qoi.width();</span>
<span class="line" id="L145"> result.height = qoi.height();</span>
<span class="line" id="L146"> result.pixels = pixels;</span>
<span class="line" id="L147"></span>
<span class="line" id="L148"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L149"> }</span>
<span class="line" id="L150"></span>
<span class="line" id="L151"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeImage</span>(allocator: Allocator, write_stream: *Image.Stream, image: Image, encoder_options: Image.EncoderOptions) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L152"> _ = allocator;</span>
<span class="line" id="L153"></span>
<span class="line" id="L154"> <span class="tok-kw">var</span> qoi = Self{};</span>
<span class="line" id="L155"> qoi.header.width = <span class="tok-builtin">@truncate</span>(image.width);</span>
<span class="line" id="L156"> qoi.header.height = <span class="tok-builtin">@truncate</span>(image.height);</span>
<span class="line" id="L157"> qoi.header.format = <span class="tok-kw">switch</span> (image.pixels) {</span>
<span class="line" id="L158"> .rgb24 =&gt; Format.rgb,</span>
<span class="line" id="L159"> .rgba32 =&gt; Format.rgba,</span>
<span class="line" id="L160"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> ImageError.Unsupported,</span>
<span class="line" id="L161"> };</span>
<span class="line" id="L162"> <span class="tok-kw">switch</span> (encoder_options) {</span>
<span class="line" id="L163"> .qoi =&gt; |qoi_encode_options| {</span>
<span class="line" id="L164"> qoi.header.colorspace = qoi_encode_options.colorspace;</span>
<span class="line" id="L165"> },</span>
<span class="line" id="L166"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L167"> qoi.header.colorspace = .srgb;</span>
<span class="line" id="L168"> },</span>
<span class="line" id="L169"> }</span>
<span class="line" id="L170"></span>
<span class="line" id="L171"> <span class="tok-kw">try</span> qoi.write(write_stream, image.pixels);</span>
<span class="line" id="L172"> }</span>
<span class="line" id="L173"></span>
<span class="line" id="L174"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">width</span>(self: Self) <span class="tok-type">usize</span> {</span>
<span class="line" id="L175"> <span class="tok-kw">return</span> self.header.width;</span>
<span class="line" id="L176"> }</span>
<span class="line" id="L177"></span>
<span class="line" id="L178"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">height</span>(self: Self) <span class="tok-type">usize</span> {</span>
<span class="line" id="L179"> <span class="tok-kw">return</span> self.header.height;</span>
<span class="line" id="L180"> }</span>
<span class="line" id="L181"></span>
<span class="line" id="L182"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelFormat</span>(self: Self) !PixelFormat {</span>
<span class="line" id="L183"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self.header.format) {</span>
<span class="line" id="L184"> .rgb =&gt; PixelFormat.rgb24,</span>
<span class="line" id="L185"> .rgba =&gt; PixelFormat.rgba32,</span>
<span class="line" id="L186"> };</span>
<span class="line" id="L187"> }</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">read</span>(self: *Self, allocator: Allocator, stream: *Image.Stream) ImageReadError!color.PixelStorage {</span>
<span class="line" id="L190"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceReader(stream);</span>
<span class="line" id="L191"></span>
<span class="line" id="L192"> <span class="tok-kw">var</span> magic_buffer: [Header.correct_magic.len]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"> <span class="tok-kw">const</span> reader = buffered_stream.reader();</span>
<span class="line" id="L195"></span>
<span class="line" id="L196"> _ = <span class="tok-kw">try</span> buffered_stream.read(magic_buffer[<span class="tok-number">0</span>..]);</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">if</span> (!std.mem.eql(<span class="tok-type">u8</span>, magic_buffer[<span class="tok-number">0</span>..], Header.correct_magic[<span class="tok-number">0</span>..])) {</span>
<span class="line" id="L199"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L200"> }</span>
<span class="line" id="L201"></span>
<span class="line" id="L202"> self.header = utils.readStruct(reader, Header, .big) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L203"></span>
<span class="line" id="L204"> <span class="tok-kw">const</span> pixel_format = <span class="tok-kw">try</span> self.pixelFormat();</span>
<span class="line" id="L205"></span>
<span class="line" id="L206"> <span class="tok-kw">var</span> pixels = <span class="tok-kw">try</span> color.PixelStorage.init(allocator, pixel_format, self.width() * self.height());</span>
<span class="line" id="L207"> <span class="tok-kw">errdefer</span> pixels.deinit(allocator);</span>
<span class="line" id="L208"></span>
<span class="line" id="L209"> <span class="tok-kw">var</span> current_color = QoiColor{ .r = <span class="tok-number">0</span>, .g = <span class="tok-number">0</span>, .b = <span class="tok-number">0</span>, .a = <span class="tok-number">0xFF</span> };</span>
<span class="line" id="L210"> <span class="tok-kw">var</span> color_lut = std.mem.zeroes([<span class="tok-number">64</span>]QoiColor);</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"> <span class="tok-kw">var</span> index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L213"> <span class="tok-kw">const</span> pixels_size: <span class="tok-type">usize</span> = <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, self.header.width) * <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, self.header.height);</span>
<span class="line" id="L214"></span>
<span class="line" id="L215"> <span class="tok-kw">while</span> (index &lt; pixels_size) {</span>
<span class="line" id="L216"> <span class="tok-kw">const</span> byte = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L217"></span>
<span class="line" id="L218"> <span class="tok-kw">var</span> new_color = current_color;</span>
<span class="line" id="L219"> <span class="tok-kw">var</span> count: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L220"></span>
<span class="line" id="L221"> <span class="tok-kw">if</span> (byte == <span class="tok-number">0b11111110</span>) { <span class="tok-comment">// QOI_OP_RGB</span>
</span>
<span class="line" id="L222"> new_color.r = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L223"> new_color.g = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L224"> new_color.b = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L225"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (byte == <span class="tok-number">0b11111111</span>) { <span class="tok-comment">// QOI_OP_RGBA</span>
</span>
<span class="line" id="L226"> new_color.r = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L227"> new_color.g = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L228"> new_color.b = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L229"> new_color.a = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L230"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (hasPrefix(byte, <span class="tok-type">u2</span>, <span class="tok-number">0b00</span>)) { <span class="tok-comment">// QOI_OP_INDEX</span>
</span>
<span class="line" id="L231"> <span class="tok-kw">const</span> color_index: <span class="tok-type">u6</span> = <span class="tok-builtin">@truncate</span>(byte);</span>
<span class="line" id="L232"> new_color = color_lut[color_index];</span>
<span class="line" id="L233"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (hasPrefix(byte, <span class="tok-type">u2</span>, <span class="tok-number">0b01</span>)) { <span class="tok-comment">// QOI_OP_DIFF</span>
</span>
<span class="line" id="L234"> <span class="tok-kw">const</span> diff_r = unmapRange2(byte &gt;&gt; <span class="tok-number">4</span>);</span>
<span class="line" id="L235"> <span class="tok-kw">const</span> diff_g = unmapRange2(byte &gt;&gt; <span class="tok-number">2</span>);</span>
<span class="line" id="L236"> <span class="tok-kw">const</span> diff_b = unmapRange2(byte &gt;&gt; <span class="tok-number">0</span>);</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"> add8(&amp;new_color.r, diff_r);</span>
<span class="line" id="L239"> add8(&amp;new_color.g, diff_g);</span>
<span class="line" id="L240"> add8(&amp;new_color.b, diff_b);</span>
<span class="line" id="L241"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (hasPrefix(byte, <span class="tok-type">u2</span>, <span class="tok-number">0b10</span>)) { <span class="tok-comment">// QOI_OP_LUMA</span>
</span>
<span class="line" id="L242"> <span class="tok-kw">const</span> diff_g = unmapRange6(byte);</span>
<span class="line" id="L243"></span>
<span class="line" id="L244"> <span class="tok-kw">const</span> diff_rg_rb = <span class="tok-kw">try</span> reader.readByte();</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"> <span class="tok-kw">const</span> diff_rg = unmapRange4(diff_rg_rb &gt;&gt; <span class="tok-number">4</span>);</span>
<span class="line" id="L247"> <span class="tok-kw">const</span> diff_rb = unmapRange4(diff_rg_rb &gt;&gt; <span class="tok-number">0</span>);</span>
<span class="line" id="L248"></span>
<span class="line" id="L249"> <span class="tok-kw">const</span> diff_r = <span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, diff_g) + diff_rg;</span>
<span class="line" id="L250"> <span class="tok-kw">const</span> diff_b = <span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, diff_g) + diff_rb;</span>
<span class="line" id="L251"></span>
<span class="line" id="L252"> add8(&amp;new_color.r, diff_r);</span>
<span class="line" id="L253"> add8(&amp;new_color.g, diff_g);</span>
<span class="line" id="L254"> add8(&amp;new_color.b, diff_b);</span>
<span class="line" id="L255"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (hasPrefix(byte, <span class="tok-type">u2</span>, <span class="tok-number">0b11</span>)) { <span class="tok-comment">// QOI_OP_RUN</span>
</span>
<span class="line" id="L256"> count = <span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-builtin">@as</span>(<span class="tok-type">u6</span>, <span class="tok-builtin">@truncate</span>(byte))) + <span class="tok-number">1</span>;</span>
<span class="line" id="L257"> std.debug.assert(count &gt;= <span class="tok-number">1</span> <span class="tok-kw">and</span> count &lt;= <span class="tok-number">62</span>);</span>
<span class="line" id="L258"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L259"> <span class="tok-comment">// we have covered all possibilities.</span>
</span>
<span class="line" id="L260"> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L261"> }</span>
<span class="line" id="L262"></span>
<span class="line" id="L263"> <span class="tok-comment">// this will happen when a file has an invalid run length</span>
</span>
<span class="line" id="L264"> <span class="tok-comment">// and we would decode more pixels than there are in the image.</span>
</span>
<span class="line" id="L265"> <span class="tok-kw">if</span> (index + count &gt; pixels_size) {</span>
<span class="line" id="L266"> <span class="tok-kw">return</span> ImageReadError.InvalidData;</span>
<span class="line" id="L267"> }</span>
<span class="line" id="L268"></span>
<span class="line" id="L269"> <span class="tok-kw">while</span> (count &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L270"> count -= <span class="tok-number">1</span>;</span>
<span class="line" id="L271"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L272"> .rgb24 =&gt; |data| {</span>
<span class="line" id="L273"> data[index] = new_color.toRgb24();</span>
<span class="line" id="L274"> },</span>
<span class="line" id="L275"> .rgba32 =&gt; |data| {</span>
<span class="line" id="L276"> data[index] = new_color.toRgba32();</span>
<span class="line" id="L277"> },</span>
<span class="line" id="L278"> <span class="tok-kw">else</span> =&gt; {},</span>
<span class="line" id="L279"> }</span>
<span class="line" id="L280"> index += <span class="tok-number">1</span>;</span>
<span class="line" id="L281"> }</span>
<span class="line" id="L282"></span>
<span class="line" id="L283"> color_lut[new_color.hash()] = new_color;</span>
<span class="line" id="L284"> current_color = new_color;</span>
<span class="line" id="L285"> }</span>
<span class="line" id="L286"></span>
<span class="line" id="L287"> <span class="tok-kw">return</span> pixels;</span>
<span class="line" id="L288"> }</span>
<span class="line" id="L289"></span>
<span class="line" id="L290"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">write</span>(self: Self, stream: *Image.Stream, pixels: color.PixelStorage) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L291"> <span class="tok-kw">var</span> buffered_stream = buffered_stream_source.bufferedStreamSourceWriter(stream);</span>
<span class="line" id="L292"> <span class="tok-kw">const</span> writer = buffered_stream.writer();</span>
<span class="line" id="L293"> <span class="tok-kw">try</span> writer.writeAll(&amp;self.header.encode());</span>
<span class="line" id="L294"></span>
<span class="line" id="L295"> <span class="tok-kw">switch</span> (pixels) {</span>
<span class="line" id="L296"> .rgb24 =&gt; |data| {</span>
<span class="line" id="L297"> <span class="tok-kw">try</span> writeData(writer, data);</span>
<span class="line" id="L298"> },</span>
<span class="line" id="L299"> .rgba32 =&gt; |data| {</span>
<span class="line" id="L300"> <span class="tok-kw">try</span> writeData(writer, data);</span>
<span class="line" id="L301"> },</span>
<span class="line" id="L302"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L303"> <span class="tok-kw">return</span> ImageError.Unsupported;</span>
<span class="line" id="L304"> },</span>
<span class="line" id="L305"> }</span>
<span class="line" id="L306"></span>
<span class="line" id="L307"> <span class="tok-kw">try</span> writer.writeAll(&amp;[<span class="tok-number">8</span>]<span class="tok-type">u8</span>{</span>
<span class="line" id="L308"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L309"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L310"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L311"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L312"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L313"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L314"> <span class="tok-number">0x00</span>,</span>
<span class="line" id="L315"> <span class="tok-number">0x01</span>,</span>
<span class="line" id="L316"> });</span>
<span class="line" id="L317"></span>
<span class="line" id="L318"> <span class="tok-kw">try</span> buffered_stream.flush();</span>
<span class="line" id="L319"> }</span>
<span class="line" id="L320"></span>
<span class="line" id="L321"> <span class="tok-kw">fn</span> <span class="tok-fn">writeData</span>(writer: buffered_stream_source.DefaultBufferedStreamSourceWriter.Writer, pixels_data: <span class="tok-kw">anytype</span>) ImageWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L322"> <span class="tok-kw">var</span> color_lut = std.mem.zeroes([<span class="tok-number">64</span>]QoiColor);</span>
<span class="line" id="L323"></span>
<span class="line" id="L324"> <span class="tok-kw">var</span> previous_pixel = QoiColor{ .r = <span class="tok-number">0</span>, .g = <span class="tok-number">0</span>, .b = <span class="tok-number">0</span>, .a = <span class="tok-number">0xFF</span> };</span>
<span class="line" id="L325"> <span class="tok-kw">var</span> run_length: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L326"></span>
<span class="line" id="L327"> <span class="tok-kw">for</span> (pixels_data, <span class="tok-number">0</span>..) |current_color, i| {</span>
<span class="line" id="L328"> <span class="tok-kw">const</span> pixel = QoiColor.from(current_color);</span>
<span class="line" id="L329"></span>
<span class="line" id="L330"> <span class="tok-kw">defer</span> previous_pixel = pixel;</span>
<span class="line" id="L331"></span>
<span class="line" id="L332"> <span class="tok-kw">const</span> same_pixel = pixel.eql(previous_pixel);</span>
<span class="line" id="L333"></span>
<span class="line" id="L334"> <span class="tok-kw">if</span> (same_pixel) {</span>
<span class="line" id="L335"> run_length += <span class="tok-number">1</span>;</span>
<span class="line" id="L336"> }</span>
<span class="line" id="L337"></span>
<span class="line" id="L338"> <span class="tok-kw">if</span> (run_length &gt; <span class="tok-number">0</span> <span class="tok-kw">and</span> (run_length == <span class="tok-number">62</span> <span class="tok-kw">or</span> !same_pixel <span class="tok-kw">or</span> (i == (pixels_data.len - <span class="tok-number">1</span>)))) {</span>
<span class="line" id="L339"> <span class="tok-comment">// QOI_OP_RUN</span>
</span>
<span class="line" id="L340"> std.debug.assert(run_length &gt;= <span class="tok-number">1</span> <span class="tok-kw">and</span> run_length &lt;= <span class="tok-number">62</span>);</span>
<span class="line" id="L341"> <span class="tok-kw">try</span> writer.writeByte(<span class="tok-number">0b1100_0000</span> | <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-builtin">@truncate</span>(run_length - <span class="tok-number">1</span>)));</span>
<span class="line" id="L342"> run_length = <span class="tok-number">0</span>;</span>
<span class="line" id="L343"> }</span>
<span class="line" id="L344"></span>
<span class="line" id="L345"> <span class="tok-kw">if</span> (!same_pixel) {</span>
<span class="line" id="L346"> <span class="tok-kw">const</span> hash = pixel.hash();</span>
<span class="line" id="L347"> <span class="tok-kw">if</span> (color_lut[hash].eql(pixel)) {</span>
<span class="line" id="L348"> <span class="tok-comment">// QOI_OP_INDEX</span>
</span>
<span class="line" id="L349"> <span class="tok-kw">try</span> writer.writeByte(<span class="tok-number">0b0000_0000</span> | hash);</span>
<span class="line" id="L350"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L351"> color_lut[hash] = pixel;</span>
<span class="line" id="L352"></span>
<span class="line" id="L353"> <span class="tok-kw">const</span> diff_r = <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, pixel.r) - <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, previous_pixel.r);</span>
<span class="line" id="L354"> <span class="tok-kw">const</span> diff_g = <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, pixel.g) - <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, previous_pixel.g);</span>
<span class="line" id="L355"> <span class="tok-kw">const</span> diff_b = <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, pixel.b) - <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, previous_pixel.b);</span>
<span class="line" id="L356"> <span class="tok-kw">const</span> diff_a = <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, pixel.a) - <span class="tok-builtin">@as</span>(<span class="tok-type">i16</span>, previous_pixel.a);</span>
<span class="line" id="L357"></span>
<span class="line" id="L358"> <span class="tok-kw">const</span> diff_rg = diff_r - diff_g;</span>
<span class="line" id="L359"> <span class="tok-kw">const</span> diff_rb = diff_b - diff_g;</span>
<span class="line" id="L360"></span>
<span class="line" id="L361"> <span class="tok-kw">if</span> (diff_a == <span class="tok-number">0</span> <span class="tok-kw">and</span> inRange2(diff_r) <span class="tok-kw">and</span> inRange2(diff_g) <span class="tok-kw">and</span> inRange2(diff_b)) {</span>
<span class="line" id="L362"> <span class="tok-comment">// QOI_OP_DIFF</span>
</span>
<span class="line" id="L363"> <span class="tok-kw">const</span> byte = <span class="tok-number">0b0100_0000</span> |</span>
<span class="line" id="L364"> (mapRange2(diff_r) &lt;&lt; <span class="tok-number">4</span>) |</span>
<span class="line" id="L365"> (mapRange2(diff_g) &lt;&lt; <span class="tok-number">2</span>) |</span>
<span class="line" id="L366"> (mapRange2(diff_b) &lt;&lt; <span class="tok-number">0</span>);</span>
<span class="line" id="L367"> <span class="tok-kw">try</span> writer.writeByte(byte);</span>
<span class="line" id="L368"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (diff_a == <span class="tok-number">0</span> <span class="tok-kw">and</span> inRange6(diff_g) <span class="tok-kw">and</span> inRange4(diff_rg) <span class="tok-kw">and</span> inRange4(diff_rb)) {</span>
<span class="line" id="L369"> <span class="tok-comment">// QOI_OP_LUMA</span>
</span>
<span class="line" id="L370"> <span class="tok-kw">try</span> writer.writeAll(&amp;[<span class="tok-number">2</span>]<span class="tok-type">u8</span>{</span>
<span class="line" id="L371"> <span class="tok-number">0b1000_0000</span> | mapRange6(diff_g),</span>
<span class="line" id="L372"> (mapRange4(diff_rg) &lt;&lt; <span class="tok-number">4</span>) | (mapRange4(diff_rb) &lt;&lt; <span class="tok-number">0</span>),</span>
<span class="line" id="L373"> });</span>
<span class="line" id="L374"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (diff_a == <span class="tok-number">0</span>) {</span>
<span class="line" id="L375"> <span class="tok-comment">// QOI_OP_RGB</span>
</span>
<span class="line" id="L376"> <span class="tok-kw">try</span> writer.writeAll(&amp;[<span class="tok-number">4</span>]<span class="tok-type">u8</span>{</span>
<span class="line" id="L377"> <span class="tok-number">0b1111_1110</span>,</span>
<span class="line" id="L378"> pixel.r,</span>
<span class="line" id="L379"> pixel.g,</span>
<span class="line" id="L380"> pixel.b,</span>
<span class="line" id="L381"> });</span>
<span class="line" id="L382"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L383"> <span class="tok-comment">// QOI_OP_RGBA</span>
</span>
<span class="line" id="L384"> <span class="tok-kw">try</span> writer.writeAll(&amp;[<span class="tok-number">5</span>]<span class="tok-type">u8</span>{</span>
<span class="line" id="L385"> <span class="tok-number">0b1111_1111</span>,</span>
<span class="line" id="L386"> pixel.r,</span>
<span class="line" id="L387"> pixel.g,</span>
<span class="line" id="L388"> pixel.b,</span>
<span class="line" id="L389"> pixel.a,</span>
<span class="line" id="L390"> });</span>
<span class="line" id="L391"> }</span>
<span class="line" id="L392"> }</span>
<span class="line" id="L393"> }</span>
<span class="line" id="L394"> }</span>
<span class="line" id="L395"> }</span>
<span class="line" id="L396"></span>
<span class="line" id="L397"> <span class="tok-kw">fn</span> <span class="tok-fn">mapRange2</span>(val: <span class="tok-type">i16</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L398"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">u2</span>, <span class="tok-builtin">@intCast</span>(val + <span class="tok-number">2</span>));</span>
<span class="line" id="L399"> }</span>
<span class="line" id="L400"> <span class="tok-kw">fn</span> <span class="tok-fn">mapRange4</span>(val: <span class="tok-type">i16</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L401"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">u4</span>, <span class="tok-builtin">@intCast</span>(val + <span class="tok-number">8</span>));</span>
<span class="line" id="L402"> }</span>
<span class="line" id="L403"> <span class="tok-kw">fn</span> <span class="tok-fn">mapRange6</span>(val: <span class="tok-type">i16</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L404"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">u6</span>, <span class="tok-builtin">@intCast</span>(val + <span class="tok-number">32</span>));</span>
<span class="line" id="L405"> }</span>
<span class="line" id="L406"></span>
<span class="line" id="L407"> <span class="tok-kw">fn</span> <span class="tok-fn">unmapRange2</span>(val: <span class="tok-type">u32</span>) <span class="tok-type">i2</span> {</span>
<span class="line" id="L408"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">i2</span>, <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-builtin">@as</span>(<span class="tok-type">u2</span>, <span class="tok-builtin">@truncate</span>(val))) - <span class="tok-number">2</span>));</span>
<span class="line" id="L409"> }</span>
<span class="line" id="L410"> <span class="tok-kw">fn</span> <span class="tok-fn">unmapRange4</span>(val: <span class="tok-type">u32</span>) <span class="tok-type">i4</span> {</span>
<span class="line" id="L411"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">i4</span>, <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-builtin">@as</span>(<span class="tok-type">u4</span>, <span class="tok-builtin">@truncate</span>(val))) - <span class="tok-number">8</span>));</span>
<span class="line" id="L412"> }</span>
<span class="line" id="L413"> <span class="tok-kw">fn</span> <span class="tok-fn">unmapRange6</span>(val: <span class="tok-type">u32</span>) <span class="tok-type">i6</span> {</span>
<span class="line" id="L414"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">i6</span>, <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-builtin">@as</span>(<span class="tok-type">u6</span>, <span class="tok-builtin">@truncate</span>(val))) - <span class="tok-number">32</span>));</span>
<span class="line" id="L415"> }</span>
<span class="line" id="L416"></span>
<span class="line" id="L417"> <span class="tok-kw">fn</span> <span class="tok-fn">inRange2</span>(val: <span class="tok-type">i16</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L418"> <span class="tok-kw">return</span> (val &gt;= -<span class="tok-number">2</span>) <span class="tok-kw">and</span> (val &lt;= <span class="tok-number">1</span>);</span>
<span class="line" id="L419"> }</span>
<span class="line" id="L420"> <span class="tok-kw">fn</span> <span class="tok-fn">inRange4</span>(val: <span class="tok-type">i16</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L421"> <span class="tok-kw">return</span> (val &gt;= -<span class="tok-number">8</span>) <span class="tok-kw">and</span> (val &lt;= <span class="tok-number">7</span>);</span>
<span class="line" id="L422"> }</span>
<span class="line" id="L423"> <span class="tok-kw">fn</span> <span class="tok-fn">inRange6</span>(val: <span class="tok-type">i16</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L424"> <span class="tok-kw">return</span> (val &gt;= -<span class="tok-number">32</span>) <span class="tok-kw">and</span> (val &lt;= <span class="tok-number">31</span>);</span>
<span class="line" id="L425"> }</span>
<span class="line" id="L426"></span>
<span class="line" id="L427"> <span class="tok-kw">fn</span> <span class="tok-fn">add8</span>(dst: *<span class="tok-type">u8</span>, diff: <span class="tok-type">i8</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L428"> dst.* +%= <span class="tok-builtin">@bitCast</span>(diff);</span>
<span class="line" id="L429"> }</span>
<span class="line" id="L430"></span>
<span class="line" id="L431"> <span class="tok-kw">fn</span> <span class="tok-fn">hasPrefix</span>(value: <span class="tok-type">u8</span>, <span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>, prefix: T) <span class="tok-type">bool</span> {</span>
<span class="line" id="L432"> <span class="tok-kw">return</span> (<span class="tok-builtin">@as</span>(T, <span class="tok-builtin">@truncate</span>(value &gt;&gt; (<span class="tok-number">8</span> - <span class="tok-builtin">@bitSizeOf</span>(T)))) == prefix);</span>
<span class="line" id="L433"> }</span>
<span class="line" id="L434">};</span>
<span class="line" id="L435"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> Allocator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>).mem.Allocator;</span>
<span class="line" id="L2"><span class="tok-kw">const</span> ArenaAllocator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>).heap.ArenaAllocator;</span>
<span class="line" id="L3"><span class="tok-kw">const</span> ArrayList = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>).ArrayList;</span>
<span class="line" id="L4"><span class="tok-kw">const</span> Rgba32 = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;color.zig&quot;</span>).Rgba32;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> MaxDepth = <span class="tok-number">8</span>;</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> OctTreeQuantizer = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L9"> rootNode: OctTreeQuantizerNode,</span>
<span class="line" id="L10"> levels: [MaxDepth]NodeArrayList,</span>
<span class="line" id="L11"> arenaAllocator: ArenaAllocator,</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"> <span class="tok-kw">const</span> NodeArrayList = ArrayList(*OctTreeQuantizerNode);</span>
<span class="line" id="L14"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: Allocator) Self {</span>
<span class="line" id="L17"> <span class="tok-kw">var</span> result = Self{</span>
<span class="line" id="L18"> .rootNode = OctTreeQuantizerNode{},</span>
<span class="line" id="L19"> .arenaAllocator = ArenaAllocator.init(allocator),</span>
<span class="line" id="L20"> .levels = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L21"> };</span>
<span class="line" id="L22"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L23"> <span class="tok-kw">while</span> (i &lt; result.levels.len) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L24"> result.levels[i] = NodeArrayList.init(allocator);</span>
<span class="line" id="L25"> }</span>
<span class="line" id="L26"> result.rootNode.init(<span class="tok-number">0</span>, &amp;result) <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L27"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L28"> }</span>
<span class="line" id="L29"></span>
<span class="line" id="L30"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L31"> self.arenaAllocator.deinit();</span>
<span class="line" id="L32"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L33"> <span class="tok-kw">while</span> (i &lt; self.levels.len) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L34"> self.levels[i].deinit();</span>
<span class="line" id="L35"> }</span>
<span class="line" id="L36"> }</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">allocateNode</span>(self: *Self) !*OctTreeQuantizerNode {</span>
<span class="line" id="L39"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> self.arenaAllocator.allocator().create(OctTreeQuantizerNode);</span>
<span class="line" id="L40"> }</span>
<span class="line" id="L41"></span>
<span class="line" id="L42"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">addLevelNode</span>(self: *Self, level: <span class="tok-type">i32</span>, node: *OctTreeQuantizerNode) !<span class="tok-type">void</span> {</span>
<span class="line" id="L43"> <span class="tok-kw">try</span> self.levels[<span class="tok-builtin">@intCast</span>(level)].append(node);</span>
<span class="line" id="L44"> }</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">addColor</span>(self: *Self, color: Rgba32) !<span class="tok-type">void</span> {</span>
<span class="line" id="L47"> <span class="tok-kw">try</span> self.rootNode.addColor(color, <span class="tok-number">0</span>, self);</span>
<span class="line" id="L48"> }</span>
<span class="line" id="L49"></span>
<span class="line" id="L50"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getPaletteIndex</span>(self: Self, color: Rgba32) !<span class="tok-type">usize</span> {</span>
<span class="line" id="L51"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> self.rootNode.getPaletteIndex(color, <span class="tok-number">0</span>);</span>
<span class="line" id="L52"> }</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">makePalette</span>(self: *Self, colorCount: <span class="tok-type">usize</span>, palette: []Rgba32) <span class="tok-type">anyerror</span>![]Rgba32 {</span>
<span class="line" id="L55"> <span class="tok-kw">var</span> paletteIndex: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L56"></span>
<span class="line" id="L57"> <span class="tok-kw">var</span> rootLeafNodes = <span class="tok-kw">try</span> self.rootNode.getLeafNodes(self.arenaAllocator.child_allocator);</span>
<span class="line" id="L58"> <span class="tok-kw">defer</span> rootLeafNodes.deinit();</span>
<span class="line" id="L59"> <span class="tok-kw">var</span> leafCount = rootLeafNodes.items.len;</span>
<span class="line" id="L60"></span>
<span class="line" id="L61"> <span class="tok-kw">var</span> level: <span class="tok-type">usize</span> = MaxDepth - <span class="tok-number">1</span>;</span>
<span class="line" id="L62"> <span class="tok-kw">while</span> (level &gt;= <span class="tok-number">0</span>) : (level -= <span class="tok-number">1</span>) {</span>
<span class="line" id="L63"> <span class="tok-kw">for</span> (self.levels[level].items) |node| {</span>
<span class="line" id="L64"> leafCount -= <span class="tok-builtin">@intCast</span>(node.removeLeaves());</span>
<span class="line" id="L65"> <span class="tok-kw">if</span> (leafCount &lt;= colorCount) {</span>
<span class="line" id="L66"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L67"> }</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"> <span class="tok-kw">if</span> (leafCount &lt;= colorCount) {</span>
<span class="line" id="L70"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L71"> }</span>
<span class="line" id="L72"> <span class="tok-kw">try</span> self.levels[level].resize(<span class="tok-number">0</span>);</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> <span class="tok-kw">var</span> processedRoofLeafNodes = <span class="tok-kw">try</span> self.rootNode.getLeafNodes(self.arenaAllocator.child_allocator);</span>
<span class="line" id="L76"> <span class="tok-kw">defer</span> processedRoofLeafNodes.deinit();</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"> <span class="tok-kw">for</span> (processedRoofLeafNodes.items) |node| {</span>
<span class="line" id="L79"> <span class="tok-kw">if</span> (paletteIndex &gt;= colorCount) {</span>
<span class="line" id="L80"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L81"> }</span>
<span class="line" id="L82"> <span class="tok-kw">if</span> (node.isLeaf()) {</span>
<span class="line" id="L83"> palette[paletteIndex] = node.getColor();</span>
<span class="line" id="L84"> node.paletteIndex = paletteIndex;</span>
<span class="line" id="L85"> paletteIndex += <span class="tok-number">1</span>;</span>
<span class="line" id="L86"> }</span>
<span class="line" id="L87"> }</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"> <span class="tok-kw">return</span> palette[<span class="tok-number">0</span>..paletteIndex];</span>
<span class="line" id="L90"> }</span>
<span class="line" id="L91">};</span>
<span class="line" id="L92"></span>
<span class="line" id="L93"><span class="tok-kw">const</span> OctTreeQuantizerNode = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L94"> red: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L95"> green: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L96"> blue: <span class="tok-type">u32</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L97"> referenceCount: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L98"> paletteIndex: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L99"> children: [<span class="tok-number">8</span>]?*Self = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L100"></span>
<span class="line" id="L101"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L102"> <span class="tok-kw">const</span> NodeArrayList = ArrayList(*Self);</span>
<span class="line" id="L103"></span>
<span class="line" id="L104"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(self: *Self, level: <span class="tok-type">i32</span>, parent: *OctTreeQuantizer) !<span class="tok-type">void</span> {</span>
<span class="line" id="L105"> self.red = <span class="tok-number">0</span>;</span>
<span class="line" id="L106"> self.green = <span class="tok-number">0</span>;</span>
<span class="line" id="L107"> self.blue = <span class="tok-number">0</span>;</span>
<span class="line" id="L108"> self.referenceCount = <span class="tok-number">0</span>;</span>
<span class="line" id="L109"> self.paletteIndex = <span class="tok-number">0</span>;</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L112"> <span class="tok-kw">while</span> (i &lt; self.children.len) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L113"> self.children[i] = <span class="tok-null">null</span>;</span>
<span class="line" id="L114"> }</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"> <span class="tok-kw">if</span> (level &lt; (MaxDepth - <span class="tok-number">1</span>)) {</span>
<span class="line" id="L117"> <span class="tok-kw">try</span> parent.addLevelNode(level, self);</span>
<span class="line" id="L118"> }</span>
<span class="line" id="L119"> }</span>
<span class="line" id="L120"></span>
<span class="line" id="L121"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isLeaf</span>(self: Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L122"> <span class="tok-kw">return</span> self.referenceCount &gt; <span class="tok-number">0</span>;</span>
<span class="line" id="L123"> }</span>
<span class="line" id="L124"></span>
<span class="line" id="L125"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getColor</span>(self: Self) Rgba32 {</span>
<span class="line" id="L126"> <span class="tok-kw">return</span> Rgba32.initRgb(<span class="tok-builtin">@intCast</span>(self.red / self.referenceCount), <span class="tok-builtin">@intCast</span>(self.green / self.referenceCount), <span class="tok-builtin">@intCast</span>(self.blue / self.referenceCount));</span>
<span class="line" id="L127"> }</span>
<span class="line" id="L128"></span>
<span class="line" id="L129"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">addColor</span>(self: *Self, color: Rgba32, level: <span class="tok-type">i32</span>, parent: *OctTreeQuantizer) <span class="tok-type">anyerror</span>!<span class="tok-type">void</span> {</span>
<span class="line" id="L130"> <span class="tok-kw">if</span> (level &gt;= MaxDepth) {</span>
<span class="line" id="L131"> self.red += color.r;</span>
<span class="line" id="L132"> self.green += color.g;</span>
<span class="line" id="L133"> self.blue += color.b;</span>
<span class="line" id="L134"> self.referenceCount += <span class="tok-number">1</span>;</span>
<span class="line" id="L135"> <span class="tok-kw">return</span>;</span>
<span class="line" id="L136"> }</span>
<span class="line" id="L137"> <span class="tok-kw">const</span> index = getColorIndex(color, level);</span>
<span class="line" id="L138"> <span class="tok-kw">if</span> (index &gt;= self.children.len) {</span>
<span class="line" id="L139"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidColorIndex;</span>
<span class="line" id="L140"> }</span>
<span class="line" id="L141"> <span class="tok-kw">if</span> (self.children[index]) |child| {</span>
<span class="line" id="L142"> <span class="tok-kw">try</span> child.addColor(color, level + <span class="tok-number">1</span>, parent);</span>
<span class="line" id="L143"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L144"> <span class="tok-kw">var</span> newNode = <span class="tok-kw">try</span> parent.allocateNode();</span>
<span class="line" id="L145"> <span class="tok-kw">try</span> newNode.init(level, parent);</span>
<span class="line" id="L146"> <span class="tok-kw">try</span> newNode.addColor(color, level + <span class="tok-number">1</span>, parent);</span>
<span class="line" id="L147"> self.children[index] = newNode;</span>
<span class="line" id="L148"> }</span>
<span class="line" id="L149"> }</span>
<span class="line" id="L150"></span>
<span class="line" id="L151"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getPaletteIndex</span>(self: Self, color: Rgba32, level: <span class="tok-type">i32</span>) <span class="tok-type">anyerror</span>!<span class="tok-type">usize</span> {</span>
<span class="line" id="L152"> <span class="tok-kw">if</span> (self.isLeaf()) {</span>
<span class="line" id="L153"> <span class="tok-kw">return</span> self.paletteIndex;</span>
<span class="line" id="L154"> }</span>
<span class="line" id="L155"> <span class="tok-kw">const</span> index = getColorIndex(color, level);</span>
<span class="line" id="L156"> <span class="tok-kw">if</span> (self.children[index]) |child| {</span>
<span class="line" id="L157"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> child.getPaletteIndex(color, level + <span class="tok-number">1</span>);</span>
<span class="line" id="L158"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L159"> <span class="tok-kw">for</span> (self.children) |childOptional| {</span>
<span class="line" id="L160"> <span class="tok-kw">if</span> (childOptional) |child| {</span>
<span class="line" id="L161"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> child.getPaletteIndex(color, level + <span class="tok-number">1</span>);</span>
<span class="line" id="L162"> }</span>
<span class="line" id="L163"> }</span>
<span class="line" id="L164"> }</span>
<span class="line" id="L165"></span>
<span class="line" id="L166"> <span class="tok-kw">return</span> <span class="tok-kw">error</span>.ColorNotFound;</span>
<span class="line" id="L167"> }</span>
<span class="line" id="L168"></span>
<span class="line" id="L169"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">getLeafNodes</span>(self: Self, allocator: Allocator) <span class="tok-type">anyerror</span>!NodeArrayList {</span>
<span class="line" id="L170"> <span class="tok-kw">var</span> leafNodes = NodeArrayList.init(allocator);</span>
<span class="line" id="L171"></span>
<span class="line" id="L172"> <span class="tok-kw">for</span> (self.children) |childOptional| {</span>
<span class="line" id="L173"> <span class="tok-kw">if</span> (childOptional) |child| {</span>
<span class="line" id="L174"> <span class="tok-kw">if</span> (child.isLeaf()) {</span>
<span class="line" id="L175"> <span class="tok-kw">try</span> leafNodes.append(child);</span>
<span class="line" id="L176"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L177"> <span class="tok-kw">var</span> childNodes = <span class="tok-kw">try</span> child.getLeafNodes(allocator);</span>
<span class="line" id="L178"> <span class="tok-kw">defer</span> childNodes.deinit();</span>
<span class="line" id="L179"> <span class="tok-kw">for</span> (childNodes.items) |childNode| {</span>
<span class="line" id="L180"> <span class="tok-kw">try</span> leafNodes.append(childNode);</span>
<span class="line" id="L181"> }</span>
<span class="line" id="L182"> }</span>
<span class="line" id="L183"> }</span>
<span class="line" id="L184"> }</span>
<span class="line" id="L185"></span>
<span class="line" id="L186"> <span class="tok-kw">return</span> leafNodes;</span>
<span class="line" id="L187"> }</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">removeLeaves</span>(self: *Self) <span class="tok-type">i32</span> {</span>
<span class="line" id="L190"> <span class="tok-kw">var</span> result: <span class="tok-type">i32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L191"> <span class="tok-kw">for</span> (self.children, <span class="tok-number">0</span>..) |childOptional, i| {</span>
<span class="line" id="L192"> <span class="tok-kw">if</span> (childOptional) |child| {</span>
<span class="line" id="L193"> self.red += child.red;</span>
<span class="line" id="L194"> self.green += child.green;</span>
<span class="line" id="L195"> self.blue += child.blue;</span>
<span class="line" id="L196"> self.referenceCount += child.referenceCount;</span>
<span class="line" id="L197"> result += <span class="tok-number">1</span>;</span>
<span class="line" id="L198"> self.children[i] = <span class="tok-null">null</span>;</span>
<span class="line" id="L199"> }</span>
<span class="line" id="L200"> }</span>
<span class="line" id="L201"> <span class="tok-kw">return</span> result - <span class="tok-number">1</span>;</span>
<span class="line" id="L202"> }</span>
<span class="line" id="L203"></span>
<span class="line" id="L204"> <span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">getColorIndex</span>(color: Rgba32, level: <span class="tok-type">i32</span>) <span class="tok-type">usize</span> {</span>
<span class="line" id="L205"> <span class="tok-kw">var</span> index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L206"> <span class="tok-kw">const</span> mask = <span class="tok-builtin">@as</span>(<span class="tok-type">u8</span>, <span class="tok-number">0b10000000</span>) &gt;&gt; <span class="tok-builtin">@intCast</span>(level);</span>
<span class="line" id="L207"> <span class="tok-kw">if</span> (color.r &amp; mask != <span class="tok-number">0</span>) {</span>
<span class="line" id="L208"> index |= <span class="tok-number">0b100</span>;</span>
<span class="line" id="L209"> }</span>
<span class="line" id="L210"> <span class="tok-kw">if</span> (color.g &amp; mask != <span class="tok-number">0</span>) {</span>
<span class="line" id="L211"> index |= <span class="tok-number">0b010</span>;</span>
<span class="line" id="L212"> }</span>
<span class="line" id="L213"> <span class="tok-kw">if</span> (color.b &amp; mask != <span class="tok-number">0</span>) {</span>
<span class="line" id="L214"> index |= <span class="tok-number">0b001</span>;</span>
<span class="line" id="L215"> }</span>
<span class="line" id="L216"> <span class="tok-kw">return</span> index;</span>
<span class="line" id="L217"> }</span>
<span class="line" id="L218">};</span>
<span class="line" id="L219"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PixelFormatVariant = <span class="tok-kw">enum</span>(<span class="tok-type">u4</span>) {</span>
<span class="line" id="L2"> none = <span class="tok-number">0</span>,</span>
<span class="line" id="L3"> bgr = <span class="tok-number">1</span>,</span>
<span class="line" id="L4"> float = <span class="tok-number">2</span>,</span>
<span class="line" id="L5"> rgb565 = <span class="tok-number">3</span>,</span>
<span class="line" id="L6"> _,</span>
<span class="line" id="L7">};</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-comment">/// The values for this enum are chosen so that:</span></span>
<span class="line" id="L10"><span class="tok-comment">/// 1. value &amp; 0xFF gives number of bits per channel</span></span>
<span class="line" id="L11"><span class="tok-comment">/// 2. value &amp; 0xF00 gives number of channels</span></span>
<span class="line" id="L12"><span class="tok-comment">/// 3. value &amp; 0xF000 gives a special variant number, 1 for Bgr, 2 for Float and 3 for special Rgb 565</span></span>
<span class="line" id="L13"><span class="tok-comment">/// Note that palette index formats have number of channels set to 0.</span></span>
<span class="line" id="L14"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PixelFormatInfo = <span class="tok-kw">packed</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L15"> bits_per_channel: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L16"> channel_count: <span class="tok-type">u4</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L17"> variant: PixelFormatVariant = .none,</span>
<span class="line" id="L18"> padding: <span class="tok-type">u16</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L19">};</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-kw">pub</span> <span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">toPixelFormatValue</span>(<span class="tok-kw">comptime</span> pixel_format: PixelFormatInfo) <span class="tok-type">u32</span> {</span>
<span class="line" id="L22"> <span class="tok-kw">return</span> <span class="tok-builtin">@bitCast</span>(pixel_format);</span>
<span class="line" id="L23">}</span>
<span class="line" id="L24"></span>
<span class="line" id="L25"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PixelFormat = <span class="tok-kw">enum</span>(<span class="tok-type">u32</span>) {</span>
<span class="line" id="L26"> invalid = <span class="tok-number">0</span>,</span>
<span class="line" id="L27"> indexed1 = toPixelFormatValue(.{ .bits_per_channel = <span class="tok-number">1</span> }),</span>
<span class="line" id="L28"> indexed2 = toPixelFormatValue(.{ .bits_per_channel = <span class="tok-number">2</span> }),</span>
<span class="line" id="L29"> indexed4 = toPixelFormatValue(.{ .bits_per_channel = <span class="tok-number">4</span> }),</span>
<span class="line" id="L30"> indexed8 = toPixelFormatValue(.{ .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L31"> indexed16 = toPixelFormatValue(.{ .bits_per_channel = <span class="tok-number">16</span> }),</span>
<span class="line" id="L32"> grayscale1 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">1</span>, .bits_per_channel = <span class="tok-number">1</span> }),</span>
<span class="line" id="L33"> grayscale2 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">1</span>, .bits_per_channel = <span class="tok-number">2</span> }),</span>
<span class="line" id="L34"> grayscale4 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">1</span>, .bits_per_channel = <span class="tok-number">4</span> }),</span>
<span class="line" id="L35"> grayscale8 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">1</span>, .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L36"> grayscale16 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">1</span>, .bits_per_channel = <span class="tok-number">16</span> }),</span>
<span class="line" id="L37"> grayscale8Alpha = toPixelFormatValue(.{ .channel_count = <span class="tok-number">2</span>, .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L38"> grayscale16Alpha = toPixelFormatValue(.{ .channel_count = <span class="tok-number">2</span>, .bits_per_channel = <span class="tok-number">16</span> }),</span>
<span class="line" id="L39"> rgb555 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">3</span>, .bits_per_channel = <span class="tok-number">5</span> }),</span>
<span class="line" id="L40"> rgb565 = toPixelFormatValue(.{ .variant = .rgb565, .channel_count = <span class="tok-number">3</span>, .bits_per_channel = <span class="tok-number">5</span> }),</span>
<span class="line" id="L41"> rgb24 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">3</span>, .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L42"> rgba32 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">4</span>, .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L43"> bgr555 = toPixelFormatValue(.{ .variant = .bgr, .channel_count = <span class="tok-number">3</span>, .bits_per_channel = <span class="tok-number">5</span> }),</span>
<span class="line" id="L44"> bgr24 = toPixelFormatValue(.{ .variant = .bgr, .channel_count = <span class="tok-number">3</span>, .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L45"> bgra32 = toPixelFormatValue(.{ .variant = .bgr, .channel_count = <span class="tok-number">4</span>, .bits_per_channel = <span class="tok-number">8</span> }),</span>
<span class="line" id="L46"> rgb48 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">3</span>, .bits_per_channel = <span class="tok-number">16</span> }),</span>
<span class="line" id="L47"> rgba64 = toPixelFormatValue(.{ .channel_count = <span class="tok-number">4</span>, .bits_per_channel = <span class="tok-number">16</span> }),</span>
<span class="line" id="L48"> float32 = toPixelFormatValue(.{ .variant = .float, .channel_count = <span class="tok-number">4</span>, .bits_per_channel = <span class="tok-number">32</span> }),</span>
<span class="line" id="L49"></span>
<span class="line" id="L50"> <span class="tok-kw">pub</span> <span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">info</span>(self: PixelFormat) PixelFormatInfo {</span>
<span class="line" id="L51"> <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(PixelFormatInfo, <span class="tok-builtin">@bitCast</span>(<span class="tok-builtin">@intFromEnum</span>(self)));</span>
<span class="line" id="L52"> }</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isGrayscale</span>(self: PixelFormat) <span class="tok-type">bool</span> {</span>
<span class="line" id="L55"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self) {</span>
<span class="line" id="L56"> .grayscale1, .grayscale2, .grayscale4, .grayscale8, .grayscale16, .grayscale8Alpha, .grayscale16Alpha =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L57"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L58"> };</span>
<span class="line" id="L59"> }</span>
<span class="line" id="L60"></span>
<span class="line" id="L61"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isIndexed</span>(self: PixelFormat) <span class="tok-type">bool</span> {</span>
<span class="line" id="L62"> <span class="tok-kw">return</span> info(self).channel_count == <span class="tok-number">0</span>;</span>
<span class="line" id="L63"> }</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isStandardRgb</span>(self: PixelFormat) <span class="tok-type">bool</span> {</span>
<span class="line" id="L66"> <span class="tok-kw">return</span> self == .rgb24 <span class="tok-kw">or</span> self == .rgb48;</span>
<span class="line" id="L67"> }</span>
<span class="line" id="L68"></span>
<span class="line" id="L69"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isRgba</span>(self: PixelFormat) <span class="tok-type">bool</span> {</span>
<span class="line" id="L70"> <span class="tok-kw">return</span> self == .rgba32 <span class="tok-kw">or</span> self == .rgba64;</span>
<span class="line" id="L71"> }</span>
<span class="line" id="L72"></span>
<span class="line" id="L73"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">is16Bit</span>(self: PixelFormat) <span class="tok-type">bool</span> {</span>
<span class="line" id="L74"> <span class="tok-kw">return</span> info(self).bits_per_channel == <span class="tok-number">16</span>;</span>
<span class="line" id="L75"> }</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">pixelStride</span>(self: PixelFormat) <span class="tok-type">u8</span> {</span>
<span class="line" id="L78"> <span class="tok-kw">if</span> (self.isIndexed()) {</span>
<span class="line" id="L79"> <span class="tok-kw">return</span> (info(self).bits_per_channel + <span class="tok-number">7</span>) / <span class="tok-number">8</span>;</span>
<span class="line" id="L80"> }</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self) {</span>
<span class="line" id="L83"> <span class="tok-kw">inline</span> <span class="tok-kw">else</span> =&gt; |value| (info(value).channel_count * info(value).bits_per_channel + <span class="tok-number">7</span>) / <span class="tok-number">8</span>,</span>
<span class="line" id="L84"> };</span>
<span class="line" id="L85"> }</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">bitsPerChannel</span>(self: PixelFormat) <span class="tok-type">u8</span> {</span>
<span class="line" id="L88"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self) {</span>
<span class="line" id="L89"> .rgb565 =&gt; <span class="tok-kw">unreachable</span>, <span class="tok-comment">// TODO: what to do in that case?</span>
</span>
<span class="line" id="L90"> <span class="tok-kw">inline</span> <span class="tok-kw">else</span> =&gt; |value| info(value).bits_per_channel,</span>
<span class="line" id="L91"> };</span>
<span class="line" id="L92"> }</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">channelCount</span>(self: PixelFormat) <span class="tok-type">u8</span> {</span>
<span class="line" id="L95"> <span class="tok-kw">if</span> (self.isIndexed()) {</span>
<span class="line" id="L96"> <span class="tok-kw">return</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L97"> }</span>
<span class="line" id="L98"></span>
<span class="line" id="L99"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (self) {</span>
<span class="line" id="L100"> <span class="tok-kw">inline</span> <span class="tok-kw">else</span> =&gt; |value| info(value).channel_count,</span>
<span class="line" id="L101"> };</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103">};</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"><span class="tok-kw">comptime</span> {</span>
<span class="line" id="L106"> <span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L107"></span>
<span class="line" id="L108"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.grayscale1) == <span class="tok-number">0x101</span>);</span>
<span class="line" id="L109"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.grayscale16) == <span class="tok-number">0x110</span>);</span>
<span class="line" id="L110"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.grayscale8Alpha) == <span class="tok-number">0x208</span>);</span>
<span class="line" id="L111"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.rgb555) == <span class="tok-number">0x305</span>);</span>
<span class="line" id="L112"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.rgb565) == <span class="tok-number">0x3305</span>);</span>
<span class="line" id="L113"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.rgba32) == <span class="tok-number">0x408</span>);</span>
<span class="line" id="L114"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.bgr24) == <span class="tok-number">0x1308</span>);</span>
<span class="line" id="L115"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.bgra32) == <span class="tok-number">0x1408</span>);</span>
<span class="line" id="L116"> std.debug.assert(<span class="tok-builtin">@intFromEnum</span>(PixelFormat.float32) == <span class="tok-number">0x2420</span>);</span>
<span class="line" id="L117">}</span>
<span class="line" id="L118"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">load</span>(bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, <span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>, <span class="tok-kw">comptime</span> len: <span class="tok-type">u32</span>) T {</span>
<span class="line" id="L4"> <span class="tok-kw">const</span> mem = std.mem.bytesAsSlice(vectorInnerType(T), bytes);</span>
<span class="line" id="L5"> <span class="tok-kw">var</span> result: T = <span class="tok-builtin">@splat</span>(<span class="tok-builtin">@as</span>(vectorInnerType(T), <span class="tok-number">0</span>));</span>
<span class="line" id="L6"> <span class="tok-kw">const</span> vector_len = <span class="tok-kw">if</span> (len == <span class="tok-number">0</span>) vectorLength(T) <span class="tok-kw">else</span> len;</span>
<span class="line" id="L7"> <span class="tok-kw">comptime</span> <span class="tok-kw">var</span> i: <span class="tok-type">u32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L8"> <span class="tok-kw">inline</span> <span class="tok-kw">while</span> (i &lt; vector_len) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L9"> result[i] = mem[i];</span>
<span class="line" id="L10"> }</span>
<span class="line" id="L11"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L12">}</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">fn</span> <span class="tok-fn">vectorLength</span>(<span class="tok-kw">comptime</span> VectorType: <span class="tok-type">type</span>) <span class="tok-type">comptime_int</span> {</span>
<span class="line" id="L15"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (<span class="tok-builtin">@typeInfo</span>(VectorType)) {</span>
<span class="line" id="L16"> .Vector =&gt; |info| info.len,</span>
<span class="line" id="L17"> .Array =&gt; |info| info.len,</span>
<span class="line" id="L18"> <span class="tok-kw">else</span> =&gt; <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;Invalid type &quot;</span> ++ <span class="tok-builtin">@typeName</span>(VectorType)),</span>
<span class="line" id="L19"> };</span>
<span class="line" id="L20">}</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"><span class="tok-kw">fn</span> <span class="tok-fn">vectorInnerType</span>(<span class="tok-kw">comptime</span> VectorType: <span class="tok-type">type</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L23"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (<span class="tok-builtin">@typeInfo</span>(VectorType)) {</span>
<span class="line" id="L24"> .Vector =&gt; |info| info.child,</span>
<span class="line" id="L25"> .Array =&gt; |info| info.child,</span>
<span class="line" id="L26"> <span class="tok-kw">else</span> =&gt; <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;Invalid type &quot;</span> ++ <span class="tok-builtin">@typeName</span>(VectorType)),</span>
<span class="line" id="L27"> };</span>
<span class="line" id="L28">}</span>
<span class="line" id="L29"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> builtin = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;builtin&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> native_endian = builtin.target.cpu.arch.endian();</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> StructReadError = <span class="tok-kw">error</span>{ EndOfStream, InvalidData } || std.io.StreamSource.ReadError;</span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> StructWriteError = std.io.StreamSource.WriteError;</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">FixedStorage</span>(<span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>, <span class="tok-kw">comptime</span> storage_size: <span class="tok-type">usize</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L10"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L11"> data: []T = &amp;.{},</span>
<span class="line" id="L12"> storage: [storage_size]T = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">resize</span>(self: *Self, size: <span class="tok-type">usize</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L17"> self.data = self.storage[<span class="tok-number">0</span>..size];</span>
<span class="line" id="L18"> }</span>
<span class="line" id="L19"> };</span>
<span class="line" id="L20">}</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toMagicNumberNative</span>(magic: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">u32</span> {</span>
<span class="line" id="L23"> <span class="tok-kw">var</span> result: <span class="tok-type">u32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L24"> <span class="tok-kw">for</span> (magic, <span class="tok-number">0</span>..) |character, index| {</span>
<span class="line" id="L25"> result |= (<span class="tok-builtin">@as</span>(<span class="tok-type">u32</span>, character) &lt;&lt; <span class="tok-builtin">@intCast</span>((index * <span class="tok-number">8</span>)));</span>
<span class="line" id="L26"> }</span>
<span class="line" id="L27"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L28">}</span>
<span class="line" id="L29"></span>
<span class="line" id="L30"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toMagicNumberForeign</span>(magic: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">u32</span> {</span>
<span class="line" id="L31"> <span class="tok-kw">var</span> result: <span class="tok-type">u32</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L32"> <span class="tok-kw">for</span> (magic, <span class="tok-number">0</span>..) |character, index| {</span>
<span class="line" id="L33"> result |= (<span class="tok-builtin">@as</span>(<span class="tok-type">u32</span>, character) &lt;&lt; <span class="tok-builtin">@intCast</span>((magic.len - <span class="tok-number">1</span> - index) * <span class="tok-number">8</span>));</span>
<span class="line" id="L34"> }</span>
<span class="line" id="L35"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L36">}</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"><span class="tok-kw">pub</span> <span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">toMagicNumber</span>(magic: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, <span class="tok-kw">comptime</span> wanted_endian: std.builtin.Endian) <span class="tok-type">u32</span> {</span>
<span class="line" id="L39"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (native_endian) {</span>
<span class="line" id="L40"> .little =&gt; {</span>
<span class="line" id="L41"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (wanted_endian) {</span>
<span class="line" id="L42"> .little =&gt; toMagicNumberNative(magic),</span>
<span class="line" id="L43"> .big =&gt; toMagicNumberForeign(magic),</span>
<span class="line" id="L44"> };</span>
<span class="line" id="L45"> },</span>
<span class="line" id="L46"> .big =&gt; {</span>
<span class="line" id="L47"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (wanted_endian) {</span>
<span class="line" id="L48"> .little =&gt; toMagicNumberForeign(magic),</span>
<span class="line" id="L49"> .big =&gt; toMagicNumberNative(magic),</span>
<span class="line" id="L50"> };</span>
<span class="line" id="L51"> },</span>
<span class="line" id="L52"> };</span>
<span class="line" id="L53">}</span>
<span class="line" id="L54"></span>
<span class="line" id="L55"><span class="tok-kw">fn</span> <span class="tok-fn">checkEnumFields</span>(data: <span class="tok-kw">anytype</span>) StructReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L56"> <span class="tok-kw">const</span> T = <span class="tok-builtin">@typeInfo</span>(<span class="tok-builtin">@TypeOf</span>(data)).Pointer.child;</span>
<span class="line" id="L57"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (std.meta.fields(T)) |entry| {</span>
<span class="line" id="L58"> <span class="tok-kw">switch</span> (<span class="tok-builtin">@typeInfo</span>(entry.<span class="tok-type">type</span>)) {</span>
<span class="line" id="L59"> .Enum =&gt; {</span>
<span class="line" id="L60"> <span class="tok-kw">const</span> value = <span class="tok-builtin">@intFromEnum</span>(<span class="tok-builtin">@field</span>(data, entry.name));</span>
<span class="line" id="L61"> _ = std.meta.intToEnum(entry.<span class="tok-type">type</span>, value) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> StructReadError.InvalidData;</span>
<span class="line" id="L62"> },</span>
<span class="line" id="L63"> .Struct =&gt; {</span>
<span class="line" id="L64"> <span class="tok-kw">try</span> checkEnumFields(&amp;<span class="tok-builtin">@field</span>(data, entry.name));</span>
<span class="line" id="L65"> },</span>
<span class="line" id="L66"> <span class="tok-kw">else</span> =&gt; {},</span>
<span class="line" id="L67"> }</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69">}</span>
<span class="line" id="L70"></span>
<span class="line" id="L71"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readStructNative</span>(reader: <span class="tok-kw">anytype</span>, <span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>) StructReadError!T {</span>
<span class="line" id="L72"> <span class="tok-kw">var</span> result: T = <span class="tok-kw">try</span> reader.readStruct(T);</span>
<span class="line" id="L73"> <span class="tok-kw">try</span> checkEnumFields(&amp;result);</span>
<span class="line" id="L74"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L75">}</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeStructNative</span>(writer: <span class="tok-kw">anytype</span>, value: <span class="tok-kw">anytype</span>) StructWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L78"> <span class="tok-kw">try</span> writer.writeStruct(value);</span>
<span class="line" id="L79">}</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeStructForeign</span>(writer: <span class="tok-kw">anytype</span>, value: <span class="tok-kw">anytype</span>) StructWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L82"> <span class="tok-kw">const</span> T = <span class="tok-builtin">@typeInfo</span>(<span class="tok-builtin">@TypeOf</span>(value));</span>
<span class="line" id="L83"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (std.meta.fields(T)) |field| {</span>
<span class="line" id="L84"> <span class="tok-kw">switch</span> (<span class="tok-builtin">@typeInfo</span>(field.<span class="tok-type">type</span>)) {</span>
<span class="line" id="L85"> .Int =&gt; {</span>
<span class="line" id="L86"> <span class="tok-kw">try</span> writer.writeIntForeign(field.<span class="tok-type">type</span>, <span class="tok-builtin">@field</span>(value, field.name));</span>
<span class="line" id="L87"> },</span>
<span class="line" id="L88"> .Struct =&gt; {</span>
<span class="line" id="L89"> <span class="tok-kw">try</span> writeStructForeign(writer, <span class="tok-builtin">@field</span>(value, field.name));</span>
<span class="line" id="L90"> },</span>
<span class="line" id="L91"> .Enum =&gt; {</span>
<span class="line" id="L92"> <span class="tok-kw">const</span> enum_value = <span class="tok-builtin">@intFromEnum</span>(<span class="tok-builtin">@field</span>(value, field.name));</span>
<span class="line" id="L93"> <span class="tok-kw">try</span> writer.writeIntForeign(field.<span class="tok-type">type</span>, enum_value);</span>
<span class="line" id="L94"> },</span>
<span class="line" id="L95"> .Bool =&gt; {</span>
<span class="line" id="L96"> <span class="tok-kw">try</span> writer.writeByte(<span class="tok-builtin">@intFromBool</span>(<span class="tok-builtin">@field</span>(value, field.name)));</span>
<span class="line" id="L97"> },</span>
<span class="line" id="L98"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L99"> <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;Add support for type &quot;</span> ++ <span class="tok-builtin">@typeName</span>(T) ++ <span class="tok-str">&quot;.&quot;</span> ++ <span class="tok-builtin">@typeName</span>(field.<span class="tok-type">type</span>) ++ <span class="tok-str">&quot; in writeStructForeign()&quot;</span>);</span>
<span class="line" id="L100"> },</span>
<span class="line" id="L101"> }</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103">}</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"><span class="tok-comment">// Extend std.mem.byteSwapAllFields to support enums</span>
</span>
<span class="line" id="L106"><span class="tok-kw">fn</span> <span class="tok-fn">swapFieldBytes</span>(data: <span class="tok-kw">anytype</span>) StructReadError!<span class="tok-type">void</span> {</span>
<span class="line" id="L107"> <span class="tok-kw">const</span> T = <span class="tok-builtin">@typeInfo</span>(<span class="tok-builtin">@TypeOf</span>(data)).Pointer.child;</span>
<span class="line" id="L108"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (std.meta.fields(T)) |entry| {</span>
<span class="line" id="L109"> <span class="tok-kw">switch</span> (<span class="tok-builtin">@typeInfo</span>(entry.<span class="tok-type">type</span>)) {</span>
<span class="line" id="L110"> .Int =&gt; |int| {</span>
<span class="line" id="L111"> <span class="tok-kw">if</span> (int.bits &gt; <span class="tok-number">8</span>) {</span>
<span class="line" id="L112"> <span class="tok-builtin">@field</span>(data, entry.name) = <span class="tok-builtin">@byteSwap</span>(<span class="tok-builtin">@field</span>(data, entry.name));</span>
<span class="line" id="L113"> }</span>
<span class="line" id="L114"> },</span>
<span class="line" id="L115"> .Struct =&gt; {</span>
<span class="line" id="L116"> <span class="tok-kw">try</span> swapFieldBytes(&amp;<span class="tok-builtin">@field</span>(data, entry.name));</span>
<span class="line" id="L117"> },</span>
<span class="line" id="L118"> .Enum =&gt; {</span>
<span class="line" id="L119"> <span class="tok-kw">const</span> value = <span class="tok-builtin">@intFromEnum</span>(<span class="tok-builtin">@field</span>(data, entry.name));</span>
<span class="line" id="L120"> <span class="tok-kw">if</span> (<span class="tok-builtin">@bitSizeOf</span>(<span class="tok-builtin">@TypeOf</span>(value)) &gt; <span class="tok-number">8</span>) {</span>
<span class="line" id="L121"> <span class="tok-builtin">@field</span>(data, entry.name) = <span class="tok-kw">try</span> std.meta.intToEnum(entry.<span class="tok-type">type</span>, <span class="tok-builtin">@byteSwap</span>(value));</span>
<span class="line" id="L122"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L123"> _ = std.meta.intToEnum(entry.<span class="tok-type">type</span>, value) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> StructReadError.InvalidData;</span>
<span class="line" id="L124"> }</span>
<span class="line" id="L125"> },</span>
<span class="line" id="L126"> .Array =&gt; |array| {</span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (array.child != <span class="tok-type">u8</span>) {</span>
<span class="line" id="L128"> <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;Add support for type &quot;</span> ++ <span class="tok-builtin">@typeName</span>(T) ++ <span class="tok-str">&quot;.&quot;</span> ++ <span class="tok-builtin">@typeName</span>(entry.<span class="tok-type">type</span>) ++ <span class="tok-str">&quot; in swapFieldBytes&quot;</span>);</span>
<span class="line" id="L129"> }</span>
<span class="line" id="L130"> },</span>
<span class="line" id="L131"> .Bool =&gt; {},</span>
<span class="line" id="L132"> <span class="tok-kw">else</span> =&gt; {</span>
<span class="line" id="L133"> <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;Add support for type &quot;</span> ++ <span class="tok-builtin">@typeName</span>(T) ++ <span class="tok-str">&quot;.&quot;</span> ++ <span class="tok-builtin">@typeName</span>(entry.<span class="tok-type">type</span>) ++ <span class="tok-str">&quot; in swapFieldBytes&quot;</span>);</span>
<span class="line" id="L134"> },</span>
<span class="line" id="L135"> }</span>
<span class="line" id="L136"> }</span>
<span class="line" id="L137">}</span>
<span class="line" id="L138"></span>
<span class="line" id="L139"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readStructForeign</span>(reader: <span class="tok-kw">anytype</span>, <span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>) StructReadError!T {</span>
<span class="line" id="L140"> <span class="tok-kw">var</span> result: T = <span class="tok-kw">try</span> reader.readStruct(T);</span>
<span class="line" id="L141"> <span class="tok-kw">try</span> swapFieldBytes(&amp;result);</span>
<span class="line" id="L142"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L143">}</span>
<span class="line" id="L144"></span>
<span class="line" id="L145"><span class="tok-kw">pub</span> <span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">readStruct</span>(reader: <span class="tok-kw">anytype</span>, <span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>, <span class="tok-kw">comptime</span> wanted_endian: std.builtin.Endian) StructReadError!T {</span>
<span class="line" id="L146"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (native_endian) {</span>
<span class="line" id="L147"> .little =&gt; {</span>
<span class="line" id="L148"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (wanted_endian) {</span>
<span class="line" id="L149"> .little =&gt; readStructNative(reader, T),</span>
<span class="line" id="L150"> .big =&gt; readStructForeign(reader, T),</span>
<span class="line" id="L151"> };</span>
<span class="line" id="L152"> },</span>
<span class="line" id="L153"> .big =&gt; {</span>
<span class="line" id="L154"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (wanted_endian) {</span>
<span class="line" id="L155"> .little =&gt; readStructForeign(reader, T),</span>
<span class="line" id="L156"> .big =&gt; readStructNative(reader, T),</span>
<span class="line" id="L157"> };</span>
<span class="line" id="L158"> },</span>
<span class="line" id="L159"> };</span>
<span class="line" id="L160">}</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"><span class="tok-kw">pub</span> <span class="tok-kw">inline</span> <span class="tok-kw">fn</span> <span class="tok-fn">writeStruct</span>(writer: <span class="tok-kw">anytype</span>, value: <span class="tok-kw">anytype</span>, <span class="tok-kw">comptime</span> wanted_endian: std.builtin.Endian) StructWriteError!<span class="tok-type">void</span> {</span>
<span class="line" id="L163"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (native_endian) {</span>
<span class="line" id="L164"> .little =&gt; {</span>
<span class="line" id="L165"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (wanted_endian) {</span>
<span class="line" id="L166"> .little =&gt; writeStructNative(writer, value),</span>
<span class="line" id="L167"> .big =&gt; writeStructForeign(writer, value),</span>
<span class="line" id="L168"> };</span>
<span class="line" id="L169"> },</span>
<span class="line" id="L170"> .big =&gt; {</span>
<span class="line" id="L171"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (wanted_endian) {</span>
<span class="line" id="L172"> .little =&gt; writeStructForeign(writer, value),</span>
<span class="line" id="L173"> .big =&gt; writeStructNative(writer, value),</span>
<span class="line" id="L174"> };</span>
<span class="line" id="L175"> },</span>
<span class="line" id="L176"> };</span>
<span class="line" id="L177">}</span>
<span class="line" id="L178"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> AllFormats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/all.zig&quot;</span>);</span>
<span class="line" id="L2"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> bmp = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/bmp.zig&quot;</span>);</span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> color = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/color.zig&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> FormatInterface = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/FormatInterface.zig&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Image = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/Image.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> gif = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/gif.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> netpbm = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/netpbm.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> OctTreeQuantizer = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/octree_quantizer.zig&quot;</span>).OctTreeQuantizer;</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> pcx = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/pcx.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> PixelFormat = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/pixel_format.zig&quot;</span>).PixelFormat;</span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> jpeg = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/jpeg.zig&quot;</span>);</span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> png = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/png.zig&quot;</span>);</span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> qoi = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/qoi.zig&quot;</span>);</span>
<span class="line" id="L14"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> tga = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/tga.zig&quot;</span>);</span>
<span class="line" id="L15"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> pam = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/pam.zig&quot;</span>);</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"><span class="tok-kw">test</span> {</span>
<span class="line" id="L18"> <span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L19"> std.testing.refAllDecls(<span class="tok-builtin">@This</span>());</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"> <span class="tok-kw">inline</span> <span class="tok-kw">for</span> (.{</span>
<span class="line" id="L22"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/compressions/lzw.zig&quot;</span>),</span>
<span class="line" id="L23"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;src/formats/png/reader.zig&quot;</span>),</span>
<span class="line" id="L24"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/buffered_stream_source_test.zig&quot;</span>),</span>
<span class="line" id="L25"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/color_test.zig&quot;</span>),</span>
<span class="line" id="L26"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/bmp_test.zig&quot;</span>),</span>
<span class="line" id="L27"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/gif_test.zig&quot;</span>),</span>
<span class="line" id="L28"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/jpeg_test.zig&quot;</span>),</span>
<span class="line" id="L29"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/netpbm_test.zig&quot;</span>),</span>
<span class="line" id="L30"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/pam_test.zig&quot;</span>),</span>
<span class="line" id="L31"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/pcx_test.zig&quot;</span>),</span>
<span class="line" id="L32"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/png_test.zig&quot;</span>),</span>
<span class="line" id="L33"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/qoi_test.zig&quot;</span>),</span>
<span class="line" id="L34"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/formats/tga_test.zig&quot;</span>),</span>
<span class="line" id="L35"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/image_test.zig&quot;</span>),</span>
<span class="line" id="L36"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/octree_quantizer_test.zig&quot;</span>),</span>
<span class="line" id="L37"> <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;tests/pixel_format_test.zig&quot;</span>),</span>
<span class="line" id="L38"> }) |source_file| std.testing.refAllDeclsRecursive(source_file);</span>
<span class="line" id="L39">}</span>
<span class="line" id="L40"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Autogenerated from https://www.unicode.org/Public/15.0.0/ucd/</span>
</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-comment">// `combiningClass` maps the code point to its combining class value.</span>
</span>
<span class="line" id="L4"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">combiningClass</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L5"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (cp) {</span>
<span class="line" id="L6"> <span class="tok-number">0x334</span>...<span class="tok-number">0x338</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L7"> <span class="tok-number">0x1CD4</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L8"> <span class="tok-number">0x1CE2</span>...<span class="tok-number">0x1CE8</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L9"> <span class="tok-number">0x20D2</span>...<span class="tok-number">0x20D3</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L10"> <span class="tok-number">0x20D8</span>...<span class="tok-number">0x20DA</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L11"> <span class="tok-number">0x20E5</span>...<span class="tok-number">0x20E6</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L12"> <span class="tok-number">0x20EA</span>...<span class="tok-number">0x20EB</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L13"> <span class="tok-number">0x10A39</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L14"> <span class="tok-number">0x16AF0</span>...<span class="tok-number">0x16AF4</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L15"> <span class="tok-number">0x1BC9E</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L16"> <span class="tok-number">0x1D167</span>...<span class="tok-number">0x1D169</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L17"> <span class="tok-number">0x16FF0</span>...<span class="tok-number">0x16FF1</span> =&gt; <span class="tok-number">6</span>,</span>
<span class="line" id="L18"> <span class="tok-number">0x93C</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L19"> <span class="tok-number">0x9BC</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L20"> <span class="tok-number">0xA3C</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L21"> <span class="tok-number">0xABC</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L22"> <span class="tok-number">0xB3C</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L23"> <span class="tok-number">0xC3C</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L24"> <span class="tok-number">0xCBC</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L25"> <span class="tok-number">0x1037</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L26"> <span class="tok-number">0x1B34</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L27"> <span class="tok-number">0x1BE6</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L28"> <span class="tok-number">0x1C37</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L29"> <span class="tok-number">0xA9B3</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L30"> <span class="tok-number">0x110BA</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L31"> <span class="tok-number">0x11173</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L32"> <span class="tok-number">0x111CA</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L33"> <span class="tok-number">0x11236</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L34"> <span class="tok-number">0x112E9</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L35"> <span class="tok-number">0x1133B</span>...<span class="tok-number">0x1133C</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L36"> <span class="tok-number">0x11446</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L37"> <span class="tok-number">0x114C3</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L38"> <span class="tok-number">0x115C0</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L39"> <span class="tok-number">0x116B7</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L40"> <span class="tok-number">0x1183A</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L41"> <span class="tok-number">0x11943</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L42"> <span class="tok-number">0x11D42</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L43"> <span class="tok-number">0x1E94A</span> =&gt; <span class="tok-number">7</span>,</span>
<span class="line" id="L44"> <span class="tok-number">0x3099</span>...<span class="tok-number">0x309A</span> =&gt; <span class="tok-number">8</span>,</span>
<span class="line" id="L45"> <span class="tok-number">0x94D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L46"> <span class="tok-number">0x9CD</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L47"> <span class="tok-number">0xA4D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L48"> <span class="tok-number">0xACD</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L49"> <span class="tok-number">0xB4D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L50"> <span class="tok-number">0xBCD</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L51"> <span class="tok-number">0xC4D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L52"> <span class="tok-number">0xCCD</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L53"> <span class="tok-number">0xD3B</span>...<span class="tok-number">0xD3C</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L54"> <span class="tok-number">0xD4D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L55"> <span class="tok-number">0xDCA</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L56"> <span class="tok-number">0xE3A</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L57"> <span class="tok-number">0xEBA</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L58"> <span class="tok-number">0xF84</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L59"> <span class="tok-number">0x1039</span>...<span class="tok-number">0x103A</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L60"> <span class="tok-number">0x1714</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L61"> <span class="tok-number">0x1715</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L62"> <span class="tok-number">0x1734</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L63"> <span class="tok-number">0x17D2</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L64"> <span class="tok-number">0x1A60</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L65"> <span class="tok-number">0x1B44</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L66"> <span class="tok-number">0x1BAA</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L67"> <span class="tok-number">0x1BAB</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L68"> <span class="tok-number">0x1BF2</span>...<span class="tok-number">0x1BF3</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L69"> <span class="tok-number">0x2D7F</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L70"> <span class="tok-number">0xA806</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L71"> <span class="tok-number">0xA82C</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L72"> <span class="tok-number">0xA8C4</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L73"> <span class="tok-number">0xA953</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L74"> <span class="tok-number">0xA9C0</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L75"> <span class="tok-number">0xAAF6</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L76"> <span class="tok-number">0xABED</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L77"> <span class="tok-number">0x10A3F</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L78"> <span class="tok-number">0x11046</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L79"> <span class="tok-number">0x11070</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L80"> <span class="tok-number">0x1107F</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L81"> <span class="tok-number">0x110B9</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L82"> <span class="tok-number">0x11133</span>...<span class="tok-number">0x11134</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L83"> <span class="tok-number">0x111C0</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L84"> <span class="tok-number">0x11235</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L85"> <span class="tok-number">0x112EA</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L86"> <span class="tok-number">0x1134D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L87"> <span class="tok-number">0x11442</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L88"> <span class="tok-number">0x114C2</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L89"> <span class="tok-number">0x115BF</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L90"> <span class="tok-number">0x1163F</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L91"> <span class="tok-number">0x116B6</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L92"> <span class="tok-number">0x1172B</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L93"> <span class="tok-number">0x11839</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L94"> <span class="tok-number">0x1193D</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L95"> <span class="tok-number">0x1193E</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L96"> <span class="tok-number">0x119E0</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L97"> <span class="tok-number">0x11A34</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L98"> <span class="tok-number">0x11A47</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L99"> <span class="tok-number">0x11A99</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L100"> <span class="tok-number">0x11C3F</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L101"> <span class="tok-number">0x11D44</span>...<span class="tok-number">0x11D45</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L102"> <span class="tok-number">0x11D97</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L103"> <span class="tok-number">0x11F41</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L104"> <span class="tok-number">0x11F42</span> =&gt; <span class="tok-number">9</span>,</span>
<span class="line" id="L105"> <span class="tok-number">0x5B0</span> =&gt; <span class="tok-number">10</span>,</span>
<span class="line" id="L106"> <span class="tok-number">0x5B1</span> =&gt; <span class="tok-number">11</span>,</span>
<span class="line" id="L107"> <span class="tok-number">0x5B2</span> =&gt; <span class="tok-number">12</span>,</span>
<span class="line" id="L108"> <span class="tok-number">0x5B3</span> =&gt; <span class="tok-number">13</span>,</span>
<span class="line" id="L109"> <span class="tok-number">0x5B4</span> =&gt; <span class="tok-number">14</span>,</span>
<span class="line" id="L110"> <span class="tok-number">0x5B5</span> =&gt; <span class="tok-number">15</span>,</span>
<span class="line" id="L111"> <span class="tok-number">0x5B6</span> =&gt; <span class="tok-number">16</span>,</span>
<span class="line" id="L112"> <span class="tok-number">0x5B7</span> =&gt; <span class="tok-number">17</span>,</span>
<span class="line" id="L113"> <span class="tok-number">0x5B8</span> =&gt; <span class="tok-number">18</span>,</span>
<span class="line" id="L114"> <span class="tok-number">0x5C7</span> =&gt; <span class="tok-number">18</span>,</span>
<span class="line" id="L115"> <span class="tok-number">0x5B9</span>...<span class="tok-number">0x5BA</span> =&gt; <span class="tok-number">19</span>,</span>
<span class="line" id="L116"> <span class="tok-number">0x5BB</span> =&gt; <span class="tok-number">20</span>,</span>
<span class="line" id="L117"> <span class="tok-number">0x5BC</span> =&gt; <span class="tok-number">21</span>,</span>
<span class="line" id="L118"> <span class="tok-number">0x5BD</span> =&gt; <span class="tok-number">22</span>,</span>
<span class="line" id="L119"> <span class="tok-number">0x5BF</span> =&gt; <span class="tok-number">23</span>,</span>
<span class="line" id="L120"> <span class="tok-number">0x5C1</span> =&gt; <span class="tok-number">24</span>,</span>
<span class="line" id="L121"> <span class="tok-number">0x5C2</span> =&gt; <span class="tok-number">25</span>,</span>
<span class="line" id="L122"> <span class="tok-number">0xFB1E</span> =&gt; <span class="tok-number">26</span>,</span>
<span class="line" id="L123"> <span class="tok-number">0x64B</span> =&gt; <span class="tok-number">27</span>,</span>
<span class="line" id="L124"> <span class="tok-number">0x8F0</span> =&gt; <span class="tok-number">27</span>,</span>
<span class="line" id="L125"> <span class="tok-number">0x64C</span> =&gt; <span class="tok-number">28</span>,</span>
<span class="line" id="L126"> <span class="tok-number">0x8F1</span> =&gt; <span class="tok-number">28</span>,</span>
<span class="line" id="L127"> <span class="tok-number">0x64D</span> =&gt; <span class="tok-number">29</span>,</span>
<span class="line" id="L128"> <span class="tok-number">0x8F2</span> =&gt; <span class="tok-number">29</span>,</span>
<span class="line" id="L129"> <span class="tok-number">0x618</span> =&gt; <span class="tok-number">30</span>,</span>
<span class="line" id="L130"> <span class="tok-number">0x64E</span> =&gt; <span class="tok-number">30</span>,</span>
<span class="line" id="L131"> <span class="tok-number">0x619</span> =&gt; <span class="tok-number">31</span>,</span>
<span class="line" id="L132"> <span class="tok-number">0x64F</span> =&gt; <span class="tok-number">31</span>,</span>
<span class="line" id="L133"> <span class="tok-number">0x61A</span> =&gt; <span class="tok-number">32</span>,</span>
<span class="line" id="L134"> <span class="tok-number">0x650</span> =&gt; <span class="tok-number">32</span>,</span>
<span class="line" id="L135"> <span class="tok-number">0x651</span> =&gt; <span class="tok-number">33</span>,</span>
<span class="line" id="L136"> <span class="tok-number">0x652</span> =&gt; <span class="tok-number">34</span>,</span>
<span class="line" id="L137"> <span class="tok-number">0x670</span> =&gt; <span class="tok-number">35</span>,</span>
<span class="line" id="L138"> <span class="tok-number">0x711</span> =&gt; <span class="tok-number">36</span>,</span>
<span class="line" id="L139"> <span class="tok-number">0xC55</span> =&gt; <span class="tok-number">84</span>,</span>
<span class="line" id="L140"> <span class="tok-number">0xC56</span> =&gt; <span class="tok-number">91</span>,</span>
<span class="line" id="L141"> <span class="tok-number">0xE38</span>...<span class="tok-number">0xE39</span> =&gt; <span class="tok-number">103</span>,</span>
<span class="line" id="L142"> <span class="tok-number">0xE48</span>...<span class="tok-number">0xE4B</span> =&gt; <span class="tok-number">107</span>,</span>
<span class="line" id="L143"> <span class="tok-number">0xEB8</span>...<span class="tok-number">0xEB9</span> =&gt; <span class="tok-number">118</span>,</span>
<span class="line" id="L144"> <span class="tok-number">0xEC8</span>...<span class="tok-number">0xECB</span> =&gt; <span class="tok-number">122</span>,</span>
<span class="line" id="L145"> <span class="tok-number">0xF71</span> =&gt; <span class="tok-number">129</span>,</span>
<span class="line" id="L146"> <span class="tok-number">0xF72</span> =&gt; <span class="tok-number">130</span>,</span>
<span class="line" id="L147"> <span class="tok-number">0xF7A</span>...<span class="tok-number">0xF7D</span> =&gt; <span class="tok-number">130</span>,</span>
<span class="line" id="L148"> <span class="tok-number">0xF80</span> =&gt; <span class="tok-number">130</span>,</span>
<span class="line" id="L149"> <span class="tok-number">0xF74</span> =&gt; <span class="tok-number">132</span>,</span>
<span class="line" id="L150"> <span class="tok-number">0x321</span>...<span class="tok-number">0x322</span> =&gt; <span class="tok-number">202</span>,</span>
<span class="line" id="L151"> <span class="tok-number">0x327</span>...<span class="tok-number">0x328</span> =&gt; <span class="tok-number">202</span>,</span>
<span class="line" id="L152"> <span class="tok-number">0x1DD0</span> =&gt; <span class="tok-number">202</span>,</span>
<span class="line" id="L153"> <span class="tok-number">0x1DCE</span> =&gt; <span class="tok-number">214</span>,</span>
<span class="line" id="L154"> <span class="tok-number">0x31B</span> =&gt; <span class="tok-number">216</span>,</span>
<span class="line" id="L155"> <span class="tok-number">0xF39</span> =&gt; <span class="tok-number">216</span>,</span>
<span class="line" id="L156"> <span class="tok-number">0x1D165</span>...<span class="tok-number">0x1D166</span> =&gt; <span class="tok-number">216</span>,</span>
<span class="line" id="L157"> <span class="tok-number">0x1D16E</span>...<span class="tok-number">0x1D172</span> =&gt; <span class="tok-number">216</span>,</span>
<span class="line" id="L158"> <span class="tok-number">0x1DFA</span> =&gt; <span class="tok-number">218</span>,</span>
<span class="line" id="L159"> <span class="tok-number">0x302A</span> =&gt; <span class="tok-number">218</span>,</span>
<span class="line" id="L160"> <span class="tok-number">0x316</span>...<span class="tok-number">0x319</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L161"> <span class="tok-number">0x31C</span>...<span class="tok-number">0x320</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L162"> <span class="tok-number">0x323</span>...<span class="tok-number">0x326</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L163"> <span class="tok-number">0x329</span>...<span class="tok-number">0x333</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L164"> <span class="tok-number">0x339</span>...<span class="tok-number">0x33C</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L165"> <span class="tok-number">0x347</span>...<span class="tok-number">0x349</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L166"> <span class="tok-number">0x34D</span>...<span class="tok-number">0x34E</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L167"> <span class="tok-number">0x353</span>...<span class="tok-number">0x356</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L168"> <span class="tok-number">0x359</span>...<span class="tok-number">0x35A</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L169"> <span class="tok-number">0x591</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L170"> <span class="tok-number">0x596</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L171"> <span class="tok-number">0x59B</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L172"> <span class="tok-number">0x5A2</span>...<span class="tok-number">0x5A7</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L173"> <span class="tok-number">0x5AA</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L174"> <span class="tok-number">0x5C5</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L175"> <span class="tok-number">0x655</span>...<span class="tok-number">0x656</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L176"> <span class="tok-number">0x65C</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L177"> <span class="tok-number">0x65F</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L178"> <span class="tok-number">0x6E3</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L179"> <span class="tok-number">0x6EA</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L180"> <span class="tok-number">0x6ED</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L181"> <span class="tok-number">0x731</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L182"> <span class="tok-number">0x734</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L183"> <span class="tok-number">0x737</span>...<span class="tok-number">0x739</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L184"> <span class="tok-number">0x73B</span>...<span class="tok-number">0x73C</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L185"> <span class="tok-number">0x73E</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L186"> <span class="tok-number">0x742</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L187"> <span class="tok-number">0x744</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L188"> <span class="tok-number">0x746</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L189"> <span class="tok-number">0x748</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L190"> <span class="tok-number">0x7F2</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L191"> <span class="tok-number">0x7FD</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L192"> <span class="tok-number">0x859</span>...<span class="tok-number">0x85B</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L193"> <span class="tok-number">0x899</span>...<span class="tok-number">0x89B</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L194"> <span class="tok-number">0x8CF</span>...<span class="tok-number">0x8D3</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L195"> <span class="tok-number">0x8E3</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L196"> <span class="tok-number">0x8E6</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L197"> <span class="tok-number">0x8E9</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L198"> <span class="tok-number">0x8ED</span>...<span class="tok-number">0x8EF</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L199"> <span class="tok-number">0x8F6</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L200"> <span class="tok-number">0x8F9</span>...<span class="tok-number">0x8FA</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L201"> <span class="tok-number">0x952</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L202"> <span class="tok-number">0xF18</span>...<span class="tok-number">0xF19</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L203"> <span class="tok-number">0xF35</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L204"> <span class="tok-number">0xF37</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L205"> <span class="tok-number">0xFC6</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L206"> <span class="tok-number">0x108D</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L207"> <span class="tok-number">0x193B</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L208"> <span class="tok-number">0x1A18</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L209"> <span class="tok-number">0x1A7F</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L210"> <span class="tok-number">0x1AB5</span>...<span class="tok-number">0x1ABA</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L211"> <span class="tok-number">0x1ABD</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L212"> <span class="tok-number">0x1ABF</span>...<span class="tok-number">0x1AC0</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L213"> <span class="tok-number">0x1AC3</span>...<span class="tok-number">0x1AC4</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L214"> <span class="tok-number">0x1ACA</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L215"> <span class="tok-number">0x1B6C</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L216"> <span class="tok-number">0x1CD5</span>...<span class="tok-number">0x1CD9</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L217"> <span class="tok-number">0x1CDC</span>...<span class="tok-number">0x1CDF</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L218"> <span class="tok-number">0x1CED</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L219"> <span class="tok-number">0x1DC2</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L220"> <span class="tok-number">0x1DCA</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L221"> <span class="tok-number">0x1DCF</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L222"> <span class="tok-number">0x1DF9</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L223"> <span class="tok-number">0x1DFD</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L224"> <span class="tok-number">0x1DFF</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L225"> <span class="tok-number">0x20E8</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L226"> <span class="tok-number">0x20EC</span>...<span class="tok-number">0x20EF</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L227"> <span class="tok-number">0xA92B</span>...<span class="tok-number">0xA92D</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L228"> <span class="tok-number">0xAAB4</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L229"> <span class="tok-number">0xFE27</span>...<span class="tok-number">0xFE2D</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L230"> <span class="tok-number">0x101FD</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L231"> <span class="tok-number">0x102E0</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L232"> <span class="tok-number">0x10A0D</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L233"> <span class="tok-number">0x10A3A</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L234"> <span class="tok-number">0x10AE6</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L235"> <span class="tok-number">0x10EFD</span>...<span class="tok-number">0x10EFF</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L236"> <span class="tok-number">0x10F46</span>...<span class="tok-number">0x10F47</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L237"> <span class="tok-number">0x10F4B</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L238"> <span class="tok-number">0x10F4D</span>...<span class="tok-number">0x10F50</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L239"> <span class="tok-number">0x10F83</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L240"> <span class="tok-number">0x10F85</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L241"> <span class="tok-number">0x1D17B</span>...<span class="tok-number">0x1D182</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L242"> <span class="tok-number">0x1D18A</span>...<span class="tok-number">0x1D18B</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L243"> <span class="tok-number">0x1E4EE</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L244"> <span class="tok-number">0x1E8D0</span>...<span class="tok-number">0x1E8D6</span> =&gt; <span class="tok-number">220</span>,</span>
<span class="line" id="L245"> <span class="tok-number">0x59A</span> =&gt; <span class="tok-number">222</span>,</span>
<span class="line" id="L246"> <span class="tok-number">0x5AD</span> =&gt; <span class="tok-number">222</span>,</span>
<span class="line" id="L247"> <span class="tok-number">0x1939</span> =&gt; <span class="tok-number">222</span>,</span>
<span class="line" id="L248"> <span class="tok-number">0x302D</span> =&gt; <span class="tok-number">222</span>,</span>
<span class="line" id="L249"> <span class="tok-number">0x302E</span>...<span class="tok-number">0x302F</span> =&gt; <span class="tok-number">224</span>,</span>
<span class="line" id="L250"> <span class="tok-number">0x1D16D</span> =&gt; <span class="tok-number">226</span>,</span>
<span class="line" id="L251"> <span class="tok-number">0x5AE</span> =&gt; <span class="tok-number">228</span>,</span>
<span class="line" id="L252"> <span class="tok-number">0x18A9</span> =&gt; <span class="tok-number">228</span>,</span>
<span class="line" id="L253"> <span class="tok-number">0x1DF7</span>...<span class="tok-number">0x1DF8</span> =&gt; <span class="tok-number">228</span>,</span>
<span class="line" id="L254"> <span class="tok-number">0x302B</span> =&gt; <span class="tok-number">228</span>,</span>
<span class="line" id="L255"> <span class="tok-number">0x300</span>...<span class="tok-number">0x314</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L256"> <span class="tok-number">0x33D</span>...<span class="tok-number">0x344</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L257"> <span class="tok-number">0x346</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L258"> <span class="tok-number">0x34A</span>...<span class="tok-number">0x34C</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L259"> <span class="tok-number">0x350</span>...<span class="tok-number">0x352</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L260"> <span class="tok-number">0x357</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L261"> <span class="tok-number">0x35B</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L262"> <span class="tok-number">0x363</span>...<span class="tok-number">0x36F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L263"> <span class="tok-number">0x483</span>...<span class="tok-number">0x487</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L264"> <span class="tok-number">0x592</span>...<span class="tok-number">0x595</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L265"> <span class="tok-number">0x597</span>...<span class="tok-number">0x599</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L266"> <span class="tok-number">0x59C</span>...<span class="tok-number">0x5A1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L267"> <span class="tok-number">0x5A8</span>...<span class="tok-number">0x5A9</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L268"> <span class="tok-number">0x5AB</span>...<span class="tok-number">0x5AC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L269"> <span class="tok-number">0x5AF</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L270"> <span class="tok-number">0x5C4</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L271"> <span class="tok-number">0x610</span>...<span class="tok-number">0x617</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L272"> <span class="tok-number">0x653</span>...<span class="tok-number">0x654</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L273"> <span class="tok-number">0x657</span>...<span class="tok-number">0x65B</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L274"> <span class="tok-number">0x65D</span>...<span class="tok-number">0x65E</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L275"> <span class="tok-number">0x6D6</span>...<span class="tok-number">0x6DC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L276"> <span class="tok-number">0x6DF</span>...<span class="tok-number">0x6E2</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L277"> <span class="tok-number">0x6E4</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L278"> <span class="tok-number">0x6E7</span>...<span class="tok-number">0x6E8</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L279"> <span class="tok-number">0x6EB</span>...<span class="tok-number">0x6EC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L280"> <span class="tok-number">0x730</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L281"> <span class="tok-number">0x732</span>...<span class="tok-number">0x733</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L282"> <span class="tok-number">0x735</span>...<span class="tok-number">0x736</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L283"> <span class="tok-number">0x73A</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L284"> <span class="tok-number">0x73D</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L285"> <span class="tok-number">0x73F</span>...<span class="tok-number">0x741</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L286"> <span class="tok-number">0x743</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L287"> <span class="tok-number">0x745</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L288"> <span class="tok-number">0x747</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L289"> <span class="tok-number">0x749</span>...<span class="tok-number">0x74A</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L290"> <span class="tok-number">0x7EB</span>...<span class="tok-number">0x7F1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L291"> <span class="tok-number">0x7F3</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L292"> <span class="tok-number">0x816</span>...<span class="tok-number">0x819</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L293"> <span class="tok-number">0x81B</span>...<span class="tok-number">0x823</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L294"> <span class="tok-number">0x825</span>...<span class="tok-number">0x827</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L295"> <span class="tok-number">0x829</span>...<span class="tok-number">0x82D</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L296"> <span class="tok-number">0x898</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L297"> <span class="tok-number">0x89C</span>...<span class="tok-number">0x89F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L298"> <span class="tok-number">0x8CA</span>...<span class="tok-number">0x8CE</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L299"> <span class="tok-number">0x8D4</span>...<span class="tok-number">0x8E1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L300"> <span class="tok-number">0x8E4</span>...<span class="tok-number">0x8E5</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L301"> <span class="tok-number">0x8E7</span>...<span class="tok-number">0x8E8</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L302"> <span class="tok-number">0x8EA</span>...<span class="tok-number">0x8EC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L303"> <span class="tok-number">0x8F3</span>...<span class="tok-number">0x8F5</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L304"> <span class="tok-number">0x8F7</span>...<span class="tok-number">0x8F8</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L305"> <span class="tok-number">0x8FB</span>...<span class="tok-number">0x8FF</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L306"> <span class="tok-number">0x951</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L307"> <span class="tok-number">0x953</span>...<span class="tok-number">0x954</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L308"> <span class="tok-number">0x9FE</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L309"> <span class="tok-number">0xF82</span>...<span class="tok-number">0xF83</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L310"> <span class="tok-number">0xF86</span>...<span class="tok-number">0xF87</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L311"> <span class="tok-number">0x135D</span>...<span class="tok-number">0x135F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L312"> <span class="tok-number">0x17DD</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L313"> <span class="tok-number">0x193A</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L314"> <span class="tok-number">0x1A17</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L315"> <span class="tok-number">0x1A75</span>...<span class="tok-number">0x1A7C</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L316"> <span class="tok-number">0x1AB0</span>...<span class="tok-number">0x1AB4</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L317"> <span class="tok-number">0x1ABB</span>...<span class="tok-number">0x1ABC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L318"> <span class="tok-number">0x1AC1</span>...<span class="tok-number">0x1AC2</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L319"> <span class="tok-number">0x1AC5</span>...<span class="tok-number">0x1AC9</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L320"> <span class="tok-number">0x1ACB</span>...<span class="tok-number">0x1ACE</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L321"> <span class="tok-number">0x1B6B</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L322"> <span class="tok-number">0x1B6D</span>...<span class="tok-number">0x1B73</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L323"> <span class="tok-number">0x1CD0</span>...<span class="tok-number">0x1CD2</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L324"> <span class="tok-number">0x1CDA</span>...<span class="tok-number">0x1CDB</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L325"> <span class="tok-number">0x1CE0</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L326"> <span class="tok-number">0x1CF4</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L327"> <span class="tok-number">0x1CF8</span>...<span class="tok-number">0x1CF9</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L328"> <span class="tok-number">0x1DC0</span>...<span class="tok-number">0x1DC1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L329"> <span class="tok-number">0x1DC3</span>...<span class="tok-number">0x1DC9</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L330"> <span class="tok-number">0x1DCB</span>...<span class="tok-number">0x1DCC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L331"> <span class="tok-number">0x1DD1</span>...<span class="tok-number">0x1DF5</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L332"> <span class="tok-number">0x1DFB</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L333"> <span class="tok-number">0x1DFE</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L334"> <span class="tok-number">0x20D0</span>...<span class="tok-number">0x20D1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L335"> <span class="tok-number">0x20D4</span>...<span class="tok-number">0x20D7</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L336"> <span class="tok-number">0x20DB</span>...<span class="tok-number">0x20DC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L337"> <span class="tok-number">0x20E1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L338"> <span class="tok-number">0x20E7</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L339"> <span class="tok-number">0x20E9</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L340"> <span class="tok-number">0x20F0</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L341"> <span class="tok-number">0x2CEF</span>...<span class="tok-number">0x2CF1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L342"> <span class="tok-number">0x2DE0</span>...<span class="tok-number">0x2DFF</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L343"> <span class="tok-number">0xA66F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L344"> <span class="tok-number">0xA674</span>...<span class="tok-number">0xA67D</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L345"> <span class="tok-number">0xA69E</span>...<span class="tok-number">0xA69F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L346"> <span class="tok-number">0xA6F0</span>...<span class="tok-number">0xA6F1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L347"> <span class="tok-number">0xA8E0</span>...<span class="tok-number">0xA8F1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L348"> <span class="tok-number">0xAAB0</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L349"> <span class="tok-number">0xAAB2</span>...<span class="tok-number">0xAAB3</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L350"> <span class="tok-number">0xAAB7</span>...<span class="tok-number">0xAAB8</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L351"> <span class="tok-number">0xAABE</span>...<span class="tok-number">0xAABF</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L352"> <span class="tok-number">0xAAC1</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L353"> <span class="tok-number">0xFE20</span>...<span class="tok-number">0xFE26</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L354"> <span class="tok-number">0xFE2E</span>...<span class="tok-number">0xFE2F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L355"> <span class="tok-number">0x10376</span>...<span class="tok-number">0x1037A</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L356"> <span class="tok-number">0x10A0F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L357"> <span class="tok-number">0x10A38</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L358"> <span class="tok-number">0x10AE5</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L359"> <span class="tok-number">0x10D24</span>...<span class="tok-number">0x10D27</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L360"> <span class="tok-number">0x10EAB</span>...<span class="tok-number">0x10EAC</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L361"> <span class="tok-number">0x10F48</span>...<span class="tok-number">0x10F4A</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L362"> <span class="tok-number">0x10F4C</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L363"> <span class="tok-number">0x10F82</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L364"> <span class="tok-number">0x10F84</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L365"> <span class="tok-number">0x11100</span>...<span class="tok-number">0x11102</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L366"> <span class="tok-number">0x11366</span>...<span class="tok-number">0x1136C</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L367"> <span class="tok-number">0x11370</span>...<span class="tok-number">0x11374</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L368"> <span class="tok-number">0x1145E</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L369"> <span class="tok-number">0x16B30</span>...<span class="tok-number">0x16B36</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L370"> <span class="tok-number">0x1D185</span>...<span class="tok-number">0x1D189</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L371"> <span class="tok-number">0x1D1AA</span>...<span class="tok-number">0x1D1AD</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L372"> <span class="tok-number">0x1D242</span>...<span class="tok-number">0x1D244</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L373"> <span class="tok-number">0x1E000</span>...<span class="tok-number">0x1E006</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L374"> <span class="tok-number">0x1E008</span>...<span class="tok-number">0x1E018</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L375"> <span class="tok-number">0x1E01B</span>...<span class="tok-number">0x1E021</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L376"> <span class="tok-number">0x1E023</span>...<span class="tok-number">0x1E024</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L377"> <span class="tok-number">0x1E026</span>...<span class="tok-number">0x1E02A</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L378"> <span class="tok-number">0x1E08F</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L379"> <span class="tok-number">0x1E130</span>...<span class="tok-number">0x1E136</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L380"> <span class="tok-number">0x1E2AE</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L381"> <span class="tok-number">0x1E2EC</span>...<span class="tok-number">0x1E2EF</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L382"> <span class="tok-number">0x1E4EF</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L383"> <span class="tok-number">0x1E944</span>...<span class="tok-number">0x1E949</span> =&gt; <span class="tok-number">230</span>,</span>
<span class="line" id="L384"> <span class="tok-number">0x315</span> =&gt; <span class="tok-number">232</span>,</span>
<span class="line" id="L385"> <span class="tok-number">0x31A</span> =&gt; <span class="tok-number">232</span>,</span>
<span class="line" id="L386"> <span class="tok-number">0x358</span> =&gt; <span class="tok-number">232</span>,</span>
<span class="line" id="L387"> <span class="tok-number">0x1DF6</span> =&gt; <span class="tok-number">232</span>,</span>
<span class="line" id="L388"> <span class="tok-number">0x302C</span> =&gt; <span class="tok-number">232</span>,</span>
<span class="line" id="L389"> <span class="tok-number">0x1E4EC</span>...<span class="tok-number">0x1E4ED</span> =&gt; <span class="tok-number">232</span>,</span>
<span class="line" id="L390"> <span class="tok-number">0x35C</span> =&gt; <span class="tok-number">233</span>,</span>
<span class="line" id="L391"> <span class="tok-number">0x35F</span> =&gt; <span class="tok-number">233</span>,</span>
<span class="line" id="L392"> <span class="tok-number">0x362</span> =&gt; <span class="tok-number">233</span>,</span>
<span class="line" id="L393"> <span class="tok-number">0x1DFC</span> =&gt; <span class="tok-number">233</span>,</span>
<span class="line" id="L394"> <span class="tok-number">0x35D</span>...<span class="tok-number">0x35E</span> =&gt; <span class="tok-number">234</span>,</span>
<span class="line" id="L395"> <span class="tok-number">0x360</span>...<span class="tok-number">0x361</span> =&gt; <span class="tok-number">234</span>,</span>
<span class="line" id="L396"> <span class="tok-number">0x1DCD</span> =&gt; <span class="tok-number">234</span>,</span>
<span class="line" id="L397"> <span class="tok-number">0x345</span> =&gt; <span class="tok-number">240</span>,</span>
<span class="line" id="L398"> <span class="tok-kw">else</span> =&gt; <span class="tok-number">0</span>,</span>
<span class="line" id="L399"> };</span>
<span class="line" id="L400">}</span>
<span class="line" id="L401"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Autogenerated from https://www.unicode.org/Public/15.0.0/ucd/</span>
</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isNumeric</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L4"> <span class="tok-kw">if</span> (cp &lt; <span class="tok-number">0xbc</span> <span class="tok-kw">or</span> cp &gt; <span class="tok-number">0x2f890</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (cp) {</span>
<span class="line" id="L7"> <span class="tok-number">0xbc</span>...<span class="tok-number">0xbe</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L8"> <span class="tok-number">0x9f4</span>...<span class="tok-number">0x9f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L9"> <span class="tok-number">0xb72</span>...<span class="tok-number">0xb77</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L10"> <span class="tok-number">0xbf0</span>...<span class="tok-number">0xbf2</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L11"> <span class="tok-number">0xc78</span>...<span class="tok-number">0xc7e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L12"> <span class="tok-number">0xd58</span>...<span class="tok-number">0xd5e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L13"> <span class="tok-number">0xd70</span>...<span class="tok-number">0xd78</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L14"> <span class="tok-number">0xf2a</span>...<span class="tok-number">0xf33</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L15"> <span class="tok-number">0x1372</span>...<span class="tok-number">0x137c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L16"> <span class="tok-number">0x16ee</span>...<span class="tok-number">0x16f0</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L17"> <span class="tok-number">0x17f0</span>...<span class="tok-number">0x17f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L18"> <span class="tok-number">0x2150</span>...<span class="tok-number">0x215f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L19"> <span class="tok-number">0x2160</span>...<span class="tok-number">0x2182</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L20"> <span class="tok-number">0x2185</span>...<span class="tok-number">0x2188</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L21"> <span class="tok-number">0x2189</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L22"> <span class="tok-number">0x2469</span>...<span class="tok-number">0x2473</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L23"> <span class="tok-number">0x247d</span>...<span class="tok-number">0x2487</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L24"> <span class="tok-number">0x2491</span>...<span class="tok-number">0x249b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L25"> <span class="tok-number">0x24eb</span>...<span class="tok-number">0x24f4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L26"> <span class="tok-number">0x24fe</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L27"> <span class="tok-number">0x277f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L28"> <span class="tok-number">0x2789</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L29"> <span class="tok-number">0x2793</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L30"> <span class="tok-number">0x2cfd</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L31"> <span class="tok-number">0x3007</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L32"> <span class="tok-number">0x3021</span>...<span class="tok-number">0x3029</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L33"> <span class="tok-number">0x3038</span>...<span class="tok-number">0x303a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L34"> <span class="tok-number">0x3192</span>...<span class="tok-number">0x3195</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L35"> <span class="tok-number">0x3220</span>...<span class="tok-number">0x3229</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L36"> <span class="tok-number">0x3248</span>...<span class="tok-number">0x324f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L37"> <span class="tok-number">0x3251</span>...<span class="tok-number">0x325f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L38"> <span class="tok-number">0x3280</span>...<span class="tok-number">0x3289</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L39"> <span class="tok-number">0x32b1</span>...<span class="tok-number">0x32bf</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L40"> <span class="tok-number">0x3405</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L41"> <span class="tok-number">0x3483</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L42"> <span class="tok-number">0x382a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L43"> <span class="tok-number">0x3b4d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L44"> <span class="tok-number">0x4e00</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L45"> <span class="tok-number">0x4e03</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L46"> <span class="tok-number">0x4e07</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L47"> <span class="tok-number">0x4e09</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L48"> <span class="tok-number">0x4e5d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L49"> <span class="tok-number">0x4e8c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L50"> <span class="tok-number">0x4e94</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L51"> <span class="tok-number">0x4e96</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L52"> <span class="tok-number">0x4ebf</span>...<span class="tok-number">0x4ec0</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L53"> <span class="tok-number">0x4edf</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L54"> <span class="tok-number">0x4ee8</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L55"> <span class="tok-number">0x4f0d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L56"> <span class="tok-number">0x4f70</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L57"> <span class="tok-number">0x5104</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L58"> <span class="tok-number">0x5146</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L59"> <span class="tok-number">0x5169</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L60"> <span class="tok-number">0x516b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L61"> <span class="tok-number">0x516d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L62"> <span class="tok-number">0x5341</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L63"> <span class="tok-number">0x5343</span>...<span class="tok-number">0x5345</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L64"> <span class="tok-number">0x534c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L65"> <span class="tok-number">0x53c1</span>...<span class="tok-number">0x53c4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L66"> <span class="tok-number">0x56db</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L67"> <span class="tok-number">0x58f1</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L68"> <span class="tok-number">0x58f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L69"> <span class="tok-number">0x5e7a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L70"> <span class="tok-number">0x5efe</span>...<span class="tok-number">0x5eff</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L71"> <span class="tok-number">0x5f0c</span>...<span class="tok-number">0x5f0e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L72"> <span class="tok-number">0x5f10</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L73"> <span class="tok-number">0x62fe</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L74"> <span class="tok-number">0x634c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L75"> <span class="tok-number">0x67d2</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L76"> <span class="tok-number">0x6f06</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L77"> <span class="tok-number">0x7396</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L78"> <span class="tok-number">0x767e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L79"> <span class="tok-number">0x8086</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L80"> <span class="tok-number">0x842c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L81"> <span class="tok-number">0x8cae</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L82"> <span class="tok-number">0x8cb3</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L83"> <span class="tok-number">0x8d30</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L84"> <span class="tok-number">0x9621</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L85"> <span class="tok-number">0x9646</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L86"> <span class="tok-number">0x964c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L87"> <span class="tok-number">0x9678</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L88"> <span class="tok-number">0x96f6</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L89"> <span class="tok-number">0xa6e6</span>...<span class="tok-number">0xa6ef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L90"> <span class="tok-number">0xa830</span>...<span class="tok-number">0xa835</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L91"> <span class="tok-number">0xf96b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L92"> <span class="tok-number">0xf973</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L93"> <span class="tok-number">0xf978</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L94"> <span class="tok-number">0xf9b2</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L95"> <span class="tok-number">0xf9d1</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L96"> <span class="tok-number">0xf9d3</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L97"> <span class="tok-number">0xf9fd</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L98"> <span class="tok-number">0x10107</span>...<span class="tok-number">0x10133</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L99"> <span class="tok-number">0x10140</span>...<span class="tok-number">0x10174</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L100"> <span class="tok-number">0x10175</span>...<span class="tok-number">0x10178</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L101"> <span class="tok-number">0x1018a</span>...<span class="tok-number">0x1018b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L102"> <span class="tok-number">0x102e1</span>...<span class="tok-number">0x102fb</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L103"> <span class="tok-number">0x10320</span>...<span class="tok-number">0x10323</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L104"> <span class="tok-number">0x10341</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L105"> <span class="tok-number">0x1034a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L106"> <span class="tok-number">0x103d1</span>...<span class="tok-number">0x103d5</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L107"> <span class="tok-number">0x10858</span>...<span class="tok-number">0x1085f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L108"> <span class="tok-number">0x10879</span>...<span class="tok-number">0x1087f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L109"> <span class="tok-number">0x108a7</span>...<span class="tok-number">0x108af</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L110"> <span class="tok-number">0x108fb</span>...<span class="tok-number">0x108ff</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L111"> <span class="tok-number">0x10916</span>...<span class="tok-number">0x1091b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L112"> <span class="tok-number">0x109bc</span>...<span class="tok-number">0x109bd</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L113"> <span class="tok-number">0x109c0</span>...<span class="tok-number">0x109cf</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L114"> <span class="tok-number">0x109d2</span>...<span class="tok-number">0x109ff</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L115"> <span class="tok-number">0x10a44</span>...<span class="tok-number">0x10a48</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L116"> <span class="tok-number">0x10a7d</span>...<span class="tok-number">0x10a7e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L117"> <span class="tok-number">0x10a9d</span>...<span class="tok-number">0x10a9f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L118"> <span class="tok-number">0x10aeb</span>...<span class="tok-number">0x10aef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L119"> <span class="tok-number">0x10b58</span>...<span class="tok-number">0x10b5f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L120"> <span class="tok-number">0x10b78</span>...<span class="tok-number">0x10b7f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L121"> <span class="tok-number">0x10ba9</span>...<span class="tok-number">0x10baf</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L122"> <span class="tok-number">0x10cfa</span>...<span class="tok-number">0x10cff</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L123"> <span class="tok-number">0x10e69</span>...<span class="tok-number">0x10e7e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L124"> <span class="tok-number">0x10f1d</span>...<span class="tok-number">0x10f26</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L125"> <span class="tok-number">0x10f51</span>...<span class="tok-number">0x10f54</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L126"> <span class="tok-number">0x10fc5</span>...<span class="tok-number">0x10fcb</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L127"> <span class="tok-number">0x1105b</span>...<span class="tok-number">0x11065</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L128"> <span class="tok-number">0x111e1</span>...<span class="tok-number">0x111f4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L129"> <span class="tok-number">0x1173a</span>...<span class="tok-number">0x1173b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L130"> <span class="tok-number">0x118ea</span>...<span class="tok-number">0x118f2</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L131"> <span class="tok-number">0x11c5a</span>...<span class="tok-number">0x11c6c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L132"> <span class="tok-number">0x11fc0</span>...<span class="tok-number">0x11fd4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L133"> <span class="tok-number">0x12400</span>...<span class="tok-number">0x1246e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L134"> <span class="tok-number">0x16b5b</span>...<span class="tok-number">0x16b61</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L135"> <span class="tok-number">0x16e80</span>...<span class="tok-number">0x16e96</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L136"> <span class="tok-number">0x1d2c0</span>...<span class="tok-number">0x1d2d3</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L137"> <span class="tok-number">0x1d2e0</span>...<span class="tok-number">0x1d2f3</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L138"> <span class="tok-number">0x1d360</span>...<span class="tok-number">0x1d378</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L139"> <span class="tok-number">0x1e8c7</span>...<span class="tok-number">0x1e8cf</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L140"> <span class="tok-number">0x1ec71</span>...<span class="tok-number">0x1ecab</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L141"> <span class="tok-number">0x1ecad</span>...<span class="tok-number">0x1ecaf</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L142"> <span class="tok-number">0x1ecb1</span>...<span class="tok-number">0x1ecb4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L143"> <span class="tok-number">0x1ed01</span>...<span class="tok-number">0x1ed2d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L144"> <span class="tok-number">0x1ed2f</span>...<span class="tok-number">0x1ed3d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L145"> <span class="tok-number">0x1f10b</span>...<span class="tok-number">0x1f10c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L146"> <span class="tok-number">0x20001</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L147"> <span class="tok-number">0x20064</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L148"> <span class="tok-number">0x200e2</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L149"> <span class="tok-number">0x20121</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L150"> <span class="tok-number">0x2092a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L151"> <span class="tok-number">0x20983</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L152"> <span class="tok-number">0x2098c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L153"> <span class="tok-number">0x2099c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L154"> <span class="tok-number">0x20aea</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L155"> <span class="tok-number">0x20afd</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L156"> <span class="tok-number">0x20b19</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L157"> <span class="tok-number">0x22390</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L158"> <span class="tok-number">0x22998</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L159"> <span class="tok-number">0x23b1b</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L160"> <span class="tok-number">0x2626d</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L161"> <span class="tok-number">0x2f890</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L162"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L163"> };</span>
<span class="line" id="L164">}</span>
<span class="line" id="L165"></span>
<span class="line" id="L166"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L167"> <span class="tok-kw">if</span> (cp &lt; <span class="tok-number">0xb2</span> <span class="tok-kw">or</span> cp &gt; <span class="tok-number">0x1f10a</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L168"></span>
<span class="line" id="L169"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (cp) {</span>
<span class="line" id="L170"> <span class="tok-number">0xb2</span>...<span class="tok-number">0xb3</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L171"> <span class="tok-number">0xb9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L172"> <span class="tok-number">0x1369</span>...<span class="tok-number">0x1371</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L173"> <span class="tok-number">0x19da</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L174"> <span class="tok-number">0x2070</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L175"> <span class="tok-number">0x2074</span>...<span class="tok-number">0x2079</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L176"> <span class="tok-number">0x2080</span>...<span class="tok-number">0x2089</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L177"> <span class="tok-number">0x2460</span>...<span class="tok-number">0x2468</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L178"> <span class="tok-number">0x2474</span>...<span class="tok-number">0x247c</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L179"> <span class="tok-number">0x2488</span>...<span class="tok-number">0x2490</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L180"> <span class="tok-number">0x24ea</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L181"> <span class="tok-number">0x24f5</span>...<span class="tok-number">0x24fd</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L182"> <span class="tok-number">0x24ff</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L183"> <span class="tok-number">0x2776</span>...<span class="tok-number">0x277e</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L184"> <span class="tok-number">0x2780</span>...<span class="tok-number">0x2788</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L185"> <span class="tok-number">0x278a</span>...<span class="tok-number">0x2792</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L186"> <span class="tok-number">0x10a40</span>...<span class="tok-number">0x10a43</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L187"> <span class="tok-number">0x10e60</span>...<span class="tok-number">0x10e68</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L188"> <span class="tok-number">0x11052</span>...<span class="tok-number">0x1105a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L189"> <span class="tok-number">0x1f100</span>...<span class="tok-number">0x1f10a</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L190"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L191"> };</span>
<span class="line" id="L192">}</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isDecimal</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L195"> <span class="tok-kw">if</span> (cp &lt; <span class="tok-number">0x30</span> <span class="tok-kw">or</span> cp &gt; <span class="tok-number">0x1fbf9</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L196"></span>
<span class="line" id="L197"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (cp) {</span>
<span class="line" id="L198"> <span class="tok-number">0x30</span>...<span class="tok-number">0x39</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L199"> <span class="tok-number">0x660</span>...<span class="tok-number">0x669</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L200"> <span class="tok-number">0x6f0</span>...<span class="tok-number">0x6f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L201"> <span class="tok-number">0x7c0</span>...<span class="tok-number">0x7c9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L202"> <span class="tok-number">0x966</span>...<span class="tok-number">0x96f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L203"> <span class="tok-number">0x9e6</span>...<span class="tok-number">0x9ef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L204"> <span class="tok-number">0xa66</span>...<span class="tok-number">0xa6f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L205"> <span class="tok-number">0xae6</span>...<span class="tok-number">0xaef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L206"> <span class="tok-number">0xb66</span>...<span class="tok-number">0xb6f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L207"> <span class="tok-number">0xbe6</span>...<span class="tok-number">0xbef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L208"> <span class="tok-number">0xc66</span>...<span class="tok-number">0xc6f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L209"> <span class="tok-number">0xce6</span>...<span class="tok-number">0xcef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L210"> <span class="tok-number">0xd66</span>...<span class="tok-number">0xd6f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L211"> <span class="tok-number">0xde6</span>...<span class="tok-number">0xdef</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L212"> <span class="tok-number">0xe50</span>...<span class="tok-number">0xe59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L213"> <span class="tok-number">0xed0</span>...<span class="tok-number">0xed9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L214"> <span class="tok-number">0xf20</span>...<span class="tok-number">0xf29</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L215"> <span class="tok-number">0x1040</span>...<span class="tok-number">0x1049</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L216"> <span class="tok-number">0x1090</span>...<span class="tok-number">0x1099</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L217"> <span class="tok-number">0x17e0</span>...<span class="tok-number">0x17e9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L218"> <span class="tok-number">0x1810</span>...<span class="tok-number">0x1819</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L219"> <span class="tok-number">0x1946</span>...<span class="tok-number">0x194f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L220"> <span class="tok-number">0x19d0</span>...<span class="tok-number">0x19d9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L221"> <span class="tok-number">0x1a80</span>...<span class="tok-number">0x1a89</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L222"> <span class="tok-number">0x1a90</span>...<span class="tok-number">0x1a99</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L223"> <span class="tok-number">0x1b50</span>...<span class="tok-number">0x1b59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L224"> <span class="tok-number">0x1bb0</span>...<span class="tok-number">0x1bb9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L225"> <span class="tok-number">0x1c40</span>...<span class="tok-number">0x1c49</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L226"> <span class="tok-number">0x1c50</span>...<span class="tok-number">0x1c59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L227"> <span class="tok-number">0xa620</span>...<span class="tok-number">0xa629</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L228"> <span class="tok-number">0xa8d0</span>...<span class="tok-number">0xa8d9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L229"> <span class="tok-number">0xa900</span>...<span class="tok-number">0xa909</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L230"> <span class="tok-number">0xa9d0</span>...<span class="tok-number">0xa9d9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L231"> <span class="tok-number">0xa9f0</span>...<span class="tok-number">0xa9f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L232"> <span class="tok-number">0xaa50</span>...<span class="tok-number">0xaa59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L233"> <span class="tok-number">0xabf0</span>...<span class="tok-number">0xabf9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L234"> <span class="tok-number">0xff10</span>...<span class="tok-number">0xff19</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L235"> <span class="tok-number">0x104a0</span>...<span class="tok-number">0x104a9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L236"> <span class="tok-number">0x10d30</span>...<span class="tok-number">0x10d39</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L237"> <span class="tok-number">0x11066</span>...<span class="tok-number">0x1106f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L238"> <span class="tok-number">0x110f0</span>...<span class="tok-number">0x110f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L239"> <span class="tok-number">0x11136</span>...<span class="tok-number">0x1113f</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L240"> <span class="tok-number">0x111d0</span>...<span class="tok-number">0x111d9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L241"> <span class="tok-number">0x112f0</span>...<span class="tok-number">0x112f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L242"> <span class="tok-number">0x11450</span>...<span class="tok-number">0x11459</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L243"> <span class="tok-number">0x114d0</span>...<span class="tok-number">0x114d9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L244"> <span class="tok-number">0x11650</span>...<span class="tok-number">0x11659</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L245"> <span class="tok-number">0x116c0</span>...<span class="tok-number">0x116c9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L246"> <span class="tok-number">0x11730</span>...<span class="tok-number">0x11739</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L247"> <span class="tok-number">0x118e0</span>...<span class="tok-number">0x118e9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L248"> <span class="tok-number">0x11950</span>...<span class="tok-number">0x11959</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L249"> <span class="tok-number">0x11c50</span>...<span class="tok-number">0x11c59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L250"> <span class="tok-number">0x11d50</span>...<span class="tok-number">0x11d59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L251"> <span class="tok-number">0x11da0</span>...<span class="tok-number">0x11da9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L252"> <span class="tok-number">0x11f50</span>...<span class="tok-number">0x11f59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L253"> <span class="tok-number">0x16a60</span>...<span class="tok-number">0x16a69</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L254"> <span class="tok-number">0x16ac0</span>...<span class="tok-number">0x16ac9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L255"> <span class="tok-number">0x16b50</span>...<span class="tok-number">0x16b59</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L256"> <span class="tok-number">0x1d7ce</span>...<span class="tok-number">0x1d7ff</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L257"> <span class="tok-number">0x1e140</span>...<span class="tok-number">0x1e149</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L258"> <span class="tok-number">0x1e2f0</span>...<span class="tok-number">0x1e2f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L259"> <span class="tok-number">0x1e4f0</span>...<span class="tok-number">0x1e4f9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L260"> <span class="tok-number">0x1e950</span>...<span class="tok-number">0x1e959</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L261"> <span class="tok-number">0x1fbf0</span>...<span class="tok-number">0x1fbf9</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L262"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L263"> };</span>
<span class="line" id="L264">}</span>
<span class="line" id="L265"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">// Autogenerated from https://www.unicode.org/Public/15.0.0/ucd/</span>
</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Kind = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L4"> L,</span>
<span class="line" id="L5"> LV,</span>
<span class="line" id="L6"> LVT,</span>
<span class="line" id="L7"> T,</span>
<span class="line" id="L8"> V,</span>
<span class="line" id="L9">};</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-comment">/// `syllableType` maps the code point to its Hangul Syllable Type.</span></span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">syllableType</span>(cp: <span class="tok-type">u21</span>) ?Kind {</span>
<span class="line" id="L13"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (cp) {</span>
<span class="line" id="L14"> <span class="tok-number">0x1100</span>...<span class="tok-number">0x115F</span> =&gt; .L,</span>
<span class="line" id="L15"> <span class="tok-number">0xA960</span>...<span class="tok-number">0xA97C</span> =&gt; .L,</span>
<span class="line" id="L16"> <span class="tok-number">0x1160</span>...<span class="tok-number">0x11A7</span> =&gt; .V,</span>
<span class="line" id="L17"> <span class="tok-number">0xD7B0</span>...<span class="tok-number">0xD7C6</span> =&gt; .V,</span>
<span class="line" id="L18"> <span class="tok-number">0x11A8</span>...<span class="tok-number">0x11FF</span> =&gt; .T,</span>
<span class="line" id="L19"> <span class="tok-number">0xD7CB</span>...<span class="tok-number">0xD7FB</span> =&gt; .T,</span>
<span class="line" id="L20"> <span class="tok-number">0xAC00</span> =&gt; .LV,</span>
<span class="line" id="L21"> <span class="tok-number">0xAC1C</span> =&gt; .LV,</span>
<span class="line" id="L22"> <span class="tok-number">0xAC38</span> =&gt; .LV,</span>
<span class="line" id="L23"> <span class="tok-number">0xAC54</span> =&gt; .LV,</span>
<span class="line" id="L24"> <span class="tok-number">0xAC70</span> =&gt; .LV,</span>
<span class="line" id="L25"> <span class="tok-number">0xAC8C</span> =&gt; .LV,</span>
<span class="line" id="L26"> <span class="tok-number">0xACA8</span> =&gt; .LV,</span>
<span class="line" id="L27"> <span class="tok-number">0xACC4</span> =&gt; .LV,</span>
<span class="line" id="L28"> <span class="tok-number">0xACE0</span> =&gt; .LV,</span>
<span class="line" id="L29"> <span class="tok-number">0xACFC</span> =&gt; .LV,</span>
<span class="line" id="L30"> <span class="tok-number">0xAD18</span> =&gt; .LV,</span>
<span class="line" id="L31"> <span class="tok-number">0xAD34</span> =&gt; .LV,</span>
<span class="line" id="L32"> <span class="tok-number">0xAD50</span> =&gt; .LV,</span>
<span class="line" id="L33"> <span class="tok-number">0xAD6C</span> =&gt; .LV,</span>
<span class="line" id="L34"> <span class="tok-number">0xAD88</span> =&gt; .LV,</span>
<span class="line" id="L35"> <span class="tok-number">0xADA4</span> =&gt; .LV,</span>
<span class="line" id="L36"> <span class="tok-number">0xADC0</span> =&gt; .LV,</span>
<span class="line" id="L37"> <span class="tok-number">0xADDC</span> =&gt; .LV,</span>
<span class="line" id="L38"> <span class="tok-number">0xADF8</span> =&gt; .LV,</span>
<span class="line" id="L39"> <span class="tok-number">0xAE14</span> =&gt; .LV,</span>
<span class="line" id="L40"> <span class="tok-number">0xAE30</span> =&gt; .LV,</span>
<span class="line" id="L41"> <span class="tok-number">0xAE4C</span> =&gt; .LV,</span>
<span class="line" id="L42"> <span class="tok-number">0xAE68</span> =&gt; .LV,</span>
<span class="line" id="L43"> <span class="tok-number">0xAE84</span> =&gt; .LV,</span>
<span class="line" id="L44"> <span class="tok-number">0xAEA0</span> =&gt; .LV,</span>
<span class="line" id="L45"> <span class="tok-number">0xAEBC</span> =&gt; .LV,</span>
<span class="line" id="L46"> <span class="tok-number">0xAED8</span> =&gt; .LV,</span>
<span class="line" id="L47"> <span class="tok-number">0xAEF4</span> =&gt; .LV,</span>
<span class="line" id="L48"> <span class="tok-number">0xAF10</span> =&gt; .LV,</span>
<span class="line" id="L49"> <span class="tok-number">0xAF2C</span> =&gt; .LV,</span>
<span class="line" id="L50"> <span class="tok-number">0xAF48</span> =&gt; .LV,</span>
<span class="line" id="L51"> <span class="tok-number">0xAF64</span> =&gt; .LV,</span>
<span class="line" id="L52"> <span class="tok-number">0xAF80</span> =&gt; .LV,</span>
<span class="line" id="L53"> <span class="tok-number">0xAF9C</span> =&gt; .LV,</span>
<span class="line" id="L54"> <span class="tok-number">0xAFB8</span> =&gt; .LV,</span>
<span class="line" id="L55"> <span class="tok-number">0xAFD4</span> =&gt; .LV,</span>
<span class="line" id="L56"> <span class="tok-number">0xAFF0</span> =&gt; .LV,</span>
<span class="line" id="L57"> <span class="tok-number">0xB00C</span> =&gt; .LV,</span>
<span class="line" id="L58"> <span class="tok-number">0xB028</span> =&gt; .LV,</span>
<span class="line" id="L59"> <span class="tok-number">0xB044</span> =&gt; .LV,</span>
<span class="line" id="L60"> <span class="tok-number">0xB060</span> =&gt; .LV,</span>
<span class="line" id="L61"> <span class="tok-number">0xB07C</span> =&gt; .LV,</span>
<span class="line" id="L62"> <span class="tok-number">0xB098</span> =&gt; .LV,</span>
<span class="line" id="L63"> <span class="tok-number">0xB0B4</span> =&gt; .LV,</span>
<span class="line" id="L64"> <span class="tok-number">0xB0D0</span> =&gt; .LV,</span>
<span class="line" id="L65"> <span class="tok-number">0xB0EC</span> =&gt; .LV,</span>
<span class="line" id="L66"> <span class="tok-number">0xB108</span> =&gt; .LV,</span>
<span class="line" id="L67"> <span class="tok-number">0xB124</span> =&gt; .LV,</span>
<span class="line" id="L68"> <span class="tok-number">0xB140</span> =&gt; .LV,</span>
<span class="line" id="L69"> <span class="tok-number">0xB15C</span> =&gt; .LV,</span>
<span class="line" id="L70"> <span class="tok-number">0xB178</span> =&gt; .LV,</span>
<span class="line" id="L71"> <span class="tok-number">0xB194</span> =&gt; .LV,</span>
<span class="line" id="L72"> <span class="tok-number">0xB1B0</span> =&gt; .LV,</span>
<span class="line" id="L73"> <span class="tok-number">0xB1CC</span> =&gt; .LV,</span>
<span class="line" id="L74"> <span class="tok-number">0xB1E8</span> =&gt; .LV,</span>
<span class="line" id="L75"> <span class="tok-number">0xB204</span> =&gt; .LV,</span>
<span class="line" id="L76"> <span class="tok-number">0xB220</span> =&gt; .LV,</span>
<span class="line" id="L77"> <span class="tok-number">0xB23C</span> =&gt; .LV,</span>
<span class="line" id="L78"> <span class="tok-number">0xB258</span> =&gt; .LV,</span>
<span class="line" id="L79"> <span class="tok-number">0xB274</span> =&gt; .LV,</span>
<span class="line" id="L80"> <span class="tok-number">0xB290</span> =&gt; .LV,</span>
<span class="line" id="L81"> <span class="tok-number">0xB2AC</span> =&gt; .LV,</span>
<span class="line" id="L82"> <span class="tok-number">0xB2C8</span> =&gt; .LV,</span>
<span class="line" id="L83"> <span class="tok-number">0xB2E4</span> =&gt; .LV,</span>
<span class="line" id="L84"> <span class="tok-number">0xB300</span> =&gt; .LV,</span>
<span class="line" id="L85"> <span class="tok-number">0xB31C</span> =&gt; .LV,</span>
<span class="line" id="L86"> <span class="tok-number">0xB338</span> =&gt; .LV,</span>
<span class="line" id="L87"> <span class="tok-number">0xB354</span> =&gt; .LV,</span>
<span class="line" id="L88"> <span class="tok-number">0xB370</span> =&gt; .LV,</span>
<span class="line" id="L89"> <span class="tok-number">0xB38C</span> =&gt; .LV,</span>
<span class="line" id="L90"> <span class="tok-number">0xB3A8</span> =&gt; .LV,</span>
<span class="line" id="L91"> <span class="tok-number">0xB3C4</span> =&gt; .LV,</span>
<span class="line" id="L92"> <span class="tok-number">0xB3E0</span> =&gt; .LV,</span>
<span class="line" id="L93"> <span class="tok-number">0xB3FC</span> =&gt; .LV,</span>
<span class="line" id="L94"> <span class="tok-number">0xB418</span> =&gt; .LV,</span>
<span class="line" id="L95"> <span class="tok-number">0xB434</span> =&gt; .LV,</span>
<span class="line" id="L96"> <span class="tok-number">0xB450</span> =&gt; .LV,</span>
<span class="line" id="L97"> <span class="tok-number">0xB46C</span> =&gt; .LV,</span>
<span class="line" id="L98"> <span class="tok-number">0xB488</span> =&gt; .LV,</span>
<span class="line" id="L99"> <span class="tok-number">0xB4A4</span> =&gt; .LV,</span>
<span class="line" id="L100"> <span class="tok-number">0xB4C0</span> =&gt; .LV,</span>
<span class="line" id="L101"> <span class="tok-number">0xB4DC</span> =&gt; .LV,</span>
<span class="line" id="L102"> <span class="tok-number">0xB4F8</span> =&gt; .LV,</span>
<span class="line" id="L103"> <span class="tok-number">0xB514</span> =&gt; .LV,</span>
<span class="line" id="L104"> <span class="tok-number">0xB530</span> =&gt; .LV,</span>
<span class="line" id="L105"> <span class="tok-number">0xB54C</span> =&gt; .LV,</span>
<span class="line" id="L106"> <span class="tok-number">0xB568</span> =&gt; .LV,</span>
<span class="line" id="L107"> <span class="tok-number">0xB584</span> =&gt; .LV,</span>
<span class="line" id="L108"> <span class="tok-number">0xB5A0</span> =&gt; .LV,</span>
<span class="line" id="L109"> <span class="tok-number">0xB5BC</span> =&gt; .LV,</span>
<span class="line" id="L110"> <span class="tok-number">0xB5D8</span> =&gt; .LV,</span>
<span class="line" id="L111"> <span class="tok-number">0xB5F4</span> =&gt; .LV,</span>
<span class="line" id="L112"> <span class="tok-number">0xB610</span> =&gt; .LV,</span>
<span class="line" id="L113"> <span class="tok-number">0xB62C</span> =&gt; .LV,</span>
<span class="line" id="L114"> <span class="tok-number">0xB648</span> =&gt; .LV,</span>
<span class="line" id="L115"> <span class="tok-number">0xB664</span> =&gt; .LV,</span>
<span class="line" id="L116"> <span class="tok-number">0xB680</span> =&gt; .LV,</span>
<span class="line" id="L117"> <span class="tok-number">0xB69C</span> =&gt; .LV,</span>
<span class="line" id="L118"> <span class="tok-number">0xB6B8</span> =&gt; .LV,</span>
<span class="line" id="L119"> <span class="tok-number">0xB6D4</span> =&gt; .LV,</span>
<span class="line" id="L120"> <span class="tok-number">0xB6F0</span> =&gt; .LV,</span>
<span class="line" id="L121"> <span class="tok-number">0xB70C</span> =&gt; .LV,</span>
<span class="line" id="L122"> <span class="tok-number">0xB728</span> =&gt; .LV,</span>
<span class="line" id="L123"> <span class="tok-number">0xB744</span> =&gt; .LV,</span>
<span class="line" id="L124"> <span class="tok-number">0xB760</span> =&gt; .LV,</span>
<span class="line" id="L125"> <span class="tok-number">0xB77C</span> =&gt; .LV,</span>
<span class="line" id="L126"> <span class="tok-number">0xB798</span> =&gt; .LV,</span>
<span class="line" id="L127"> <span class="tok-number">0xB7B4</span> =&gt; .LV,</span>
<span class="line" id="L128"> <span class="tok-number">0xB7D0</span> =&gt; .LV,</span>
<span class="line" id="L129"> <span class="tok-number">0xB7EC</span> =&gt; .LV,</span>
<span class="line" id="L130"> <span class="tok-number">0xB808</span> =&gt; .LV,</span>
<span class="line" id="L131"> <span class="tok-number">0xB824</span> =&gt; .LV,</span>
<span class="line" id="L132"> <span class="tok-number">0xB840</span> =&gt; .LV,</span>
<span class="line" id="L133"> <span class="tok-number">0xB85C</span> =&gt; .LV,</span>
<span class="line" id="L134"> <span class="tok-number">0xB878</span> =&gt; .LV,</span>
<span class="line" id="L135"> <span class="tok-number">0xB894</span> =&gt; .LV,</span>
<span class="line" id="L136"> <span class="tok-number">0xB8B0</span> =&gt; .LV,</span>
<span class="line" id="L137"> <span class="tok-number">0xB8CC</span> =&gt; .LV,</span>
<span class="line" id="L138"> <span class="tok-number">0xB8E8</span> =&gt; .LV,</span>
<span class="line" id="L139"> <span class="tok-number">0xB904</span> =&gt; .LV,</span>
<span class="line" id="L140"> <span class="tok-number">0xB920</span> =&gt; .LV,</span>
<span class="line" id="L141"> <span class="tok-number">0xB93C</span> =&gt; .LV,</span>
<span class="line" id="L142"> <span class="tok-number">0xB958</span> =&gt; .LV,</span>
<span class="line" id="L143"> <span class="tok-number">0xB974</span> =&gt; .LV,</span>
<span class="line" id="L144"> <span class="tok-number">0xB990</span> =&gt; .LV,</span>
<span class="line" id="L145"> <span class="tok-number">0xB9AC</span> =&gt; .LV,</span>
<span class="line" id="L146"> <span class="tok-number">0xB9C8</span> =&gt; .LV,</span>
<span class="line" id="L147"> <span class="tok-number">0xB9E4</span> =&gt; .LV,</span>
<span class="line" id="L148"> <span class="tok-number">0xBA00</span> =&gt; .LV,</span>
<span class="line" id="L149"> <span class="tok-number">0xBA1C</span> =&gt; .LV,</span>
<span class="line" id="L150"> <span class="tok-number">0xBA38</span> =&gt; .LV,</span>
<span class="line" id="L151"> <span class="tok-number">0xBA54</span> =&gt; .LV,</span>
<span class="line" id="L152"> <span class="tok-number">0xBA70</span> =&gt; .LV,</span>
<span class="line" id="L153"> <span class="tok-number">0xBA8C</span> =&gt; .LV,</span>
<span class="line" id="L154"> <span class="tok-number">0xBAA8</span> =&gt; .LV,</span>
<span class="line" id="L155"> <span class="tok-number">0xBAC4</span> =&gt; .LV,</span>
<span class="line" id="L156"> <span class="tok-number">0xBAE0</span> =&gt; .LV,</span>
<span class="line" id="L157"> <span class="tok-number">0xBAFC</span> =&gt; .LV,</span>
<span class="line" id="L158"> <span class="tok-number">0xBB18</span> =&gt; .LV,</span>
<span class="line" id="L159"> <span class="tok-number">0xBB34</span> =&gt; .LV,</span>
<span class="line" id="L160"> <span class="tok-number">0xBB50</span> =&gt; .LV,</span>
<span class="line" id="L161"> <span class="tok-number">0xBB6C</span> =&gt; .LV,</span>
<span class="line" id="L162"> <span class="tok-number">0xBB88</span> =&gt; .LV,</span>
<span class="line" id="L163"> <span class="tok-number">0xBBA4</span> =&gt; .LV,</span>
<span class="line" id="L164"> <span class="tok-number">0xBBC0</span> =&gt; .LV,</span>
<span class="line" id="L165"> <span class="tok-number">0xBBDC</span> =&gt; .LV,</span>
<span class="line" id="L166"> <span class="tok-number">0xBBF8</span> =&gt; .LV,</span>
<span class="line" id="L167"> <span class="tok-number">0xBC14</span> =&gt; .LV,</span>
<span class="line" id="L168"> <span class="tok-number">0xBC30</span> =&gt; .LV,</span>
<span class="line" id="L169"> <span class="tok-number">0xBC4C</span> =&gt; .LV,</span>
<span class="line" id="L170"> <span class="tok-number">0xBC68</span> =&gt; .LV,</span>
<span class="line" id="L171"> <span class="tok-number">0xBC84</span> =&gt; .LV,</span>
<span class="line" id="L172"> <span class="tok-number">0xBCA0</span> =&gt; .LV,</span>
<span class="line" id="L173"> <span class="tok-number">0xBCBC</span> =&gt; .LV,</span>
<span class="line" id="L174"> <span class="tok-number">0xBCD8</span> =&gt; .LV,</span>
<span class="line" id="L175"> <span class="tok-number">0xBCF4</span> =&gt; .LV,</span>
<span class="line" id="L176"> <span class="tok-number">0xBD10</span> =&gt; .LV,</span>
<span class="line" id="L177"> <span class="tok-number">0xBD2C</span> =&gt; .LV,</span>
<span class="line" id="L178"> <span class="tok-number">0xBD48</span> =&gt; .LV,</span>
<span class="line" id="L179"> <span class="tok-number">0xBD64</span> =&gt; .LV,</span>
<span class="line" id="L180"> <span class="tok-number">0xBD80</span> =&gt; .LV,</span>
<span class="line" id="L181"> <span class="tok-number">0xBD9C</span> =&gt; .LV,</span>
<span class="line" id="L182"> <span class="tok-number">0xBDB8</span> =&gt; .LV,</span>
<span class="line" id="L183"> <span class="tok-number">0xBDD4</span> =&gt; .LV,</span>
<span class="line" id="L184"> <span class="tok-number">0xBDF0</span> =&gt; .LV,</span>
<span class="line" id="L185"> <span class="tok-number">0xBE0C</span> =&gt; .LV,</span>
<span class="line" id="L186"> <span class="tok-number">0xBE28</span> =&gt; .LV,</span>
<span class="line" id="L187"> <span class="tok-number">0xBE44</span> =&gt; .LV,</span>
<span class="line" id="L188"> <span class="tok-number">0xBE60</span> =&gt; .LV,</span>
<span class="line" id="L189"> <span class="tok-number">0xBE7C</span> =&gt; .LV,</span>
<span class="line" id="L190"> <span class="tok-number">0xBE98</span> =&gt; .LV,</span>
<span class="line" id="L191"> <span class="tok-number">0xBEB4</span> =&gt; .LV,</span>
<span class="line" id="L192"> <span class="tok-number">0xBED0</span> =&gt; .LV,</span>
<span class="line" id="L193"> <span class="tok-number">0xBEEC</span> =&gt; .LV,</span>
<span class="line" id="L194"> <span class="tok-number">0xBF08</span> =&gt; .LV,</span>
<span class="line" id="L195"> <span class="tok-number">0xBF24</span> =&gt; .LV,</span>
<span class="line" id="L196"> <span class="tok-number">0xBF40</span> =&gt; .LV,</span>
<span class="line" id="L197"> <span class="tok-number">0xBF5C</span> =&gt; .LV,</span>
<span class="line" id="L198"> <span class="tok-number">0xBF78</span> =&gt; .LV,</span>
<span class="line" id="L199"> <span class="tok-number">0xBF94</span> =&gt; .LV,</span>
<span class="line" id="L200"> <span class="tok-number">0xBFB0</span> =&gt; .LV,</span>
<span class="line" id="L201"> <span class="tok-number">0xBFCC</span> =&gt; .LV,</span>
<span class="line" id="L202"> <span class="tok-number">0xBFE8</span> =&gt; .LV,</span>
<span class="line" id="L203"> <span class="tok-number">0xC004</span> =&gt; .LV,</span>
<span class="line" id="L204"> <span class="tok-number">0xC020</span> =&gt; .LV,</span>
<span class="line" id="L205"> <span class="tok-number">0xC03C</span> =&gt; .LV,</span>
<span class="line" id="L206"> <span class="tok-number">0xC058</span> =&gt; .LV,</span>
<span class="line" id="L207"> <span class="tok-number">0xC074</span> =&gt; .LV,</span>
<span class="line" id="L208"> <span class="tok-number">0xC090</span> =&gt; .LV,</span>
<span class="line" id="L209"> <span class="tok-number">0xC0AC</span> =&gt; .LV,</span>
<span class="line" id="L210"> <span class="tok-number">0xC0C8</span> =&gt; .LV,</span>
<span class="line" id="L211"> <span class="tok-number">0xC0E4</span> =&gt; .LV,</span>
<span class="line" id="L212"> <span class="tok-number">0xC100</span> =&gt; .LV,</span>
<span class="line" id="L213"> <span class="tok-number">0xC11C</span> =&gt; .LV,</span>
<span class="line" id="L214"> <span class="tok-number">0xC138</span> =&gt; .LV,</span>
<span class="line" id="L215"> <span class="tok-number">0xC154</span> =&gt; .LV,</span>
<span class="line" id="L216"> <span class="tok-number">0xC170</span> =&gt; .LV,</span>
<span class="line" id="L217"> <span class="tok-number">0xC18C</span> =&gt; .LV,</span>
<span class="line" id="L218"> <span class="tok-number">0xC1A8</span> =&gt; .LV,</span>
<span class="line" id="L219"> <span class="tok-number">0xC1C4</span> =&gt; .LV,</span>
<span class="line" id="L220"> <span class="tok-number">0xC1E0</span> =&gt; .LV,</span>
<span class="line" id="L221"> <span class="tok-number">0xC1FC</span> =&gt; .LV,</span>
<span class="line" id="L222"> <span class="tok-number">0xC218</span> =&gt; .LV,</span>
<span class="line" id="L223"> <span class="tok-number">0xC234</span> =&gt; .LV,</span>
<span class="line" id="L224"> <span class="tok-number">0xC250</span> =&gt; .LV,</span>
<span class="line" id="L225"> <span class="tok-number">0xC26C</span> =&gt; .LV,</span>
<span class="line" id="L226"> <span class="tok-number">0xC288</span> =&gt; .LV,</span>
<span class="line" id="L227"> <span class="tok-number">0xC2A4</span> =&gt; .LV,</span>
<span class="line" id="L228"> <span class="tok-number">0xC2C0</span> =&gt; .LV,</span>
<span class="line" id="L229"> <span class="tok-number">0xC2DC</span> =&gt; .LV,</span>
<span class="line" id="L230"> <span class="tok-number">0xC2F8</span> =&gt; .LV,</span>
<span class="line" id="L231"> <span class="tok-number">0xC314</span> =&gt; .LV,</span>
<span class="line" id="L232"> <span class="tok-number">0xC330</span> =&gt; .LV,</span>
<span class="line" id="L233"> <span class="tok-number">0xC34C</span> =&gt; .LV,</span>
<span class="line" id="L234"> <span class="tok-number">0xC368</span> =&gt; .LV,</span>
<span class="line" id="L235"> <span class="tok-number">0xC384</span> =&gt; .LV,</span>
<span class="line" id="L236"> <span class="tok-number">0xC3A0</span> =&gt; .LV,</span>
<span class="line" id="L237"> <span class="tok-number">0xC3BC</span> =&gt; .LV,</span>
<span class="line" id="L238"> <span class="tok-number">0xC3D8</span> =&gt; .LV,</span>
<span class="line" id="L239"> <span class="tok-number">0xC3F4</span> =&gt; .LV,</span>
<span class="line" id="L240"> <span class="tok-number">0xC410</span> =&gt; .LV,</span>
<span class="line" id="L241"> <span class="tok-number">0xC42C</span> =&gt; .LV,</span>
<span class="line" id="L242"> <span class="tok-number">0xC448</span> =&gt; .LV,</span>
<span class="line" id="L243"> <span class="tok-number">0xC464</span> =&gt; .LV,</span>
<span class="line" id="L244"> <span class="tok-number">0xC480</span> =&gt; .LV,</span>
<span class="line" id="L245"> <span class="tok-number">0xC49C</span> =&gt; .LV,</span>
<span class="line" id="L246"> <span class="tok-number">0xC4B8</span> =&gt; .LV,</span>
<span class="line" id="L247"> <span class="tok-number">0xC4D4</span> =&gt; .LV,</span>
<span class="line" id="L248"> <span class="tok-number">0xC4F0</span> =&gt; .LV,</span>
<span class="line" id="L249"> <span class="tok-number">0xC50C</span> =&gt; .LV,</span>
<span class="line" id="L250"> <span class="tok-number">0xC528</span> =&gt; .LV,</span>
<span class="line" id="L251"> <span class="tok-number">0xC544</span> =&gt; .LV,</span>
<span class="line" id="L252"> <span class="tok-number">0xC560</span> =&gt; .LV,</span>
<span class="line" id="L253"> <span class="tok-number">0xC57C</span> =&gt; .LV,</span>
<span class="line" id="L254"> <span class="tok-number">0xC598</span> =&gt; .LV,</span>
<span class="line" id="L255"> <span class="tok-number">0xC5B4</span> =&gt; .LV,</span>
<span class="line" id="L256"> <span class="tok-number">0xC5D0</span> =&gt; .LV,</span>
<span class="line" id="L257"> <span class="tok-number">0xC5EC</span> =&gt; .LV,</span>
<span class="line" id="L258"> <span class="tok-number">0xC608</span> =&gt; .LV,</span>
<span class="line" id="L259"> <span class="tok-number">0xC624</span> =&gt; .LV,</span>
<span class="line" id="L260"> <span class="tok-number">0xC640</span> =&gt; .LV,</span>
<span class="line" id="L261"> <span class="tok-number">0xC65C</span> =&gt; .LV,</span>
<span class="line" id="L262"> <span class="tok-number">0xC678</span> =&gt; .LV,</span>
<span class="line" id="L263"> <span class="tok-number">0xC694</span> =&gt; .LV,</span>
<span class="line" id="L264"> <span class="tok-number">0xC6B0</span> =&gt; .LV,</span>
<span class="line" id="L265"> <span class="tok-number">0xC6CC</span> =&gt; .LV,</span>
<span class="line" id="L266"> <span class="tok-number">0xC6E8</span> =&gt; .LV,</span>
<span class="line" id="L267"> <span class="tok-number">0xC704</span> =&gt; .LV,</span>
<span class="line" id="L268"> <span class="tok-number">0xC720</span> =&gt; .LV,</span>
<span class="line" id="L269"> <span class="tok-number">0xC73C</span> =&gt; .LV,</span>
<span class="line" id="L270"> <span class="tok-number">0xC758</span> =&gt; .LV,</span>
<span class="line" id="L271"> <span class="tok-number">0xC774</span> =&gt; .LV,</span>
<span class="line" id="L272"> <span class="tok-number">0xC790</span> =&gt; .LV,</span>
<span class="line" id="L273"> <span class="tok-number">0xC7AC</span> =&gt; .LV,</span>
<span class="line" id="L274"> <span class="tok-number">0xC7C8</span> =&gt; .LV,</span>
<span class="line" id="L275"> <span class="tok-number">0xC7E4</span> =&gt; .LV,</span>
<span class="line" id="L276"> <span class="tok-number">0xC800</span> =&gt; .LV,</span>
<span class="line" id="L277"> <span class="tok-number">0xC81C</span> =&gt; .LV,</span>
<span class="line" id="L278"> <span class="tok-number">0xC838</span> =&gt; .LV,</span>
<span class="line" id="L279"> <span class="tok-number">0xC854</span> =&gt; .LV,</span>
<span class="line" id="L280"> <span class="tok-number">0xC870</span> =&gt; .LV,</span>
<span class="line" id="L281"> <span class="tok-number">0xC88C</span> =&gt; .LV,</span>
<span class="line" id="L282"> <span class="tok-number">0xC8A8</span> =&gt; .LV,</span>
<span class="line" id="L283"> <span class="tok-number">0xC8C4</span> =&gt; .LV,</span>
<span class="line" id="L284"> <span class="tok-number">0xC8E0</span> =&gt; .LV,</span>
<span class="line" id="L285"> <span class="tok-number">0xC8FC</span> =&gt; .LV,</span>
<span class="line" id="L286"> <span class="tok-number">0xC918</span> =&gt; .LV,</span>
<span class="line" id="L287"> <span class="tok-number">0xC934</span> =&gt; .LV,</span>
<span class="line" id="L288"> <span class="tok-number">0xC950</span> =&gt; .LV,</span>
<span class="line" id="L289"> <span class="tok-number">0xC96C</span> =&gt; .LV,</span>
<span class="line" id="L290"> <span class="tok-number">0xC988</span> =&gt; .LV,</span>
<span class="line" id="L291"> <span class="tok-number">0xC9A4</span> =&gt; .LV,</span>
<span class="line" id="L292"> <span class="tok-number">0xC9C0</span> =&gt; .LV,</span>
<span class="line" id="L293"> <span class="tok-number">0xC9DC</span> =&gt; .LV,</span>
<span class="line" id="L294"> <span class="tok-number">0xC9F8</span> =&gt; .LV,</span>
<span class="line" id="L295"> <span class="tok-number">0xCA14</span> =&gt; .LV,</span>
<span class="line" id="L296"> <span class="tok-number">0xCA30</span> =&gt; .LV,</span>
<span class="line" id="L297"> <span class="tok-number">0xCA4C</span> =&gt; .LV,</span>
<span class="line" id="L298"> <span class="tok-number">0xCA68</span> =&gt; .LV,</span>
<span class="line" id="L299"> <span class="tok-number">0xCA84</span> =&gt; .LV,</span>
<span class="line" id="L300"> <span class="tok-number">0xCAA0</span> =&gt; .LV,</span>
<span class="line" id="L301"> <span class="tok-number">0xCABC</span> =&gt; .LV,</span>
<span class="line" id="L302"> <span class="tok-number">0xCAD8</span> =&gt; .LV,</span>
<span class="line" id="L303"> <span class="tok-number">0xCAF4</span> =&gt; .LV,</span>
<span class="line" id="L304"> <span class="tok-number">0xCB10</span> =&gt; .LV,</span>
<span class="line" id="L305"> <span class="tok-number">0xCB2C</span> =&gt; .LV,</span>
<span class="line" id="L306"> <span class="tok-number">0xCB48</span> =&gt; .LV,</span>
<span class="line" id="L307"> <span class="tok-number">0xCB64</span> =&gt; .LV,</span>
<span class="line" id="L308"> <span class="tok-number">0xCB80</span> =&gt; .LV,</span>
<span class="line" id="L309"> <span class="tok-number">0xCB9C</span> =&gt; .LV,</span>
<span class="line" id="L310"> <span class="tok-number">0xCBB8</span> =&gt; .LV,</span>
<span class="line" id="L311"> <span class="tok-number">0xCBD4</span> =&gt; .LV,</span>
<span class="line" id="L312"> <span class="tok-number">0xCBF0</span> =&gt; .LV,</span>
<span class="line" id="L313"> <span class="tok-number">0xCC0C</span> =&gt; .LV,</span>
<span class="line" id="L314"> <span class="tok-number">0xCC28</span> =&gt; .LV,</span>
<span class="line" id="L315"> <span class="tok-number">0xCC44</span> =&gt; .LV,</span>
<span class="line" id="L316"> <span class="tok-number">0xCC60</span> =&gt; .LV,</span>
<span class="line" id="L317"> <span class="tok-number">0xCC7C</span> =&gt; .LV,</span>
<span class="line" id="L318"> <span class="tok-number">0xCC98</span> =&gt; .LV,</span>
<span class="line" id="L319"> <span class="tok-number">0xCCB4</span> =&gt; .LV,</span>
<span class="line" id="L320"> <span class="tok-number">0xCCD0</span> =&gt; .LV,</span>
<span class="line" id="L321"> <span class="tok-number">0xCCEC</span> =&gt; .LV,</span>
<span class="line" id="L322"> <span class="tok-number">0xCD08</span> =&gt; .LV,</span>
<span class="line" id="L323"> <span class="tok-number">0xCD24</span> =&gt; .LV,</span>
<span class="line" id="L324"> <span class="tok-number">0xCD40</span> =&gt; .LV,</span>
<span class="line" id="L325"> <span class="tok-number">0xCD5C</span> =&gt; .LV,</span>
<span class="line" id="L326"> <span class="tok-number">0xCD78</span> =&gt; .LV,</span>
<span class="line" id="L327"> <span class="tok-number">0xCD94</span> =&gt; .LV,</span>
<span class="line" id="L328"> <span class="tok-number">0xCDB0</span> =&gt; .LV,</span>
<span class="line" id="L329"> <span class="tok-number">0xCDCC</span> =&gt; .LV,</span>
<span class="line" id="L330"> <span class="tok-number">0xCDE8</span> =&gt; .LV,</span>
<span class="line" id="L331"> <span class="tok-number">0xCE04</span> =&gt; .LV,</span>
<span class="line" id="L332"> <span class="tok-number">0xCE20</span> =&gt; .LV,</span>
<span class="line" id="L333"> <span class="tok-number">0xCE3C</span> =&gt; .LV,</span>
<span class="line" id="L334"> <span class="tok-number">0xCE58</span> =&gt; .LV,</span>
<span class="line" id="L335"> <span class="tok-number">0xCE74</span> =&gt; .LV,</span>
<span class="line" id="L336"> <span class="tok-number">0xCE90</span> =&gt; .LV,</span>
<span class="line" id="L337"> <span class="tok-number">0xCEAC</span> =&gt; .LV,</span>
<span class="line" id="L338"> <span class="tok-number">0xCEC8</span> =&gt; .LV,</span>
<span class="line" id="L339"> <span class="tok-number">0xCEE4</span> =&gt; .LV,</span>
<span class="line" id="L340"> <span class="tok-number">0xCF00</span> =&gt; .LV,</span>
<span class="line" id="L341"> <span class="tok-number">0xCF1C</span> =&gt; .LV,</span>
<span class="line" id="L342"> <span class="tok-number">0xCF38</span> =&gt; .LV,</span>
<span class="line" id="L343"> <span class="tok-number">0xCF54</span> =&gt; .LV,</span>
<span class="line" id="L344"> <span class="tok-number">0xCF70</span> =&gt; .LV,</span>
<span class="line" id="L345"> <span class="tok-number">0xCF8C</span> =&gt; .LV,</span>
<span class="line" id="L346"> <span class="tok-number">0xCFA8</span> =&gt; .LV,</span>
<span class="line" id="L347"> <span class="tok-number">0xCFC4</span> =&gt; .LV,</span>
<span class="line" id="L348"> <span class="tok-number">0xCFE0</span> =&gt; .LV,</span>
<span class="line" id="L349"> <span class="tok-number">0xCFFC</span> =&gt; .LV,</span>
<span class="line" id="L350"> <span class="tok-number">0xD018</span> =&gt; .LV,</span>
<span class="line" id="L351"> <span class="tok-number">0xD034</span> =&gt; .LV,</span>
<span class="line" id="L352"> <span class="tok-number">0xD050</span> =&gt; .LV,</span>
<span class="line" id="L353"> <span class="tok-number">0xD06C</span> =&gt; .LV,</span>
<span class="line" id="L354"> <span class="tok-number">0xD088</span> =&gt; .LV,</span>
<span class="line" id="L355"> <span class="tok-number">0xD0A4</span> =&gt; .LV,</span>
<span class="line" id="L356"> <span class="tok-number">0xD0C0</span> =&gt; .LV,</span>
<span class="line" id="L357"> <span class="tok-number">0xD0DC</span> =&gt; .LV,</span>
<span class="line" id="L358"> <span class="tok-number">0xD0F8</span> =&gt; .LV,</span>
<span class="line" id="L359"> <span class="tok-number">0xD114</span> =&gt; .LV,</span>
<span class="line" id="L360"> <span class="tok-number">0xD130</span> =&gt; .LV,</span>
<span class="line" id="L361"> <span class="tok-number">0xD14C</span> =&gt; .LV,</span>
<span class="line" id="L362"> <span class="tok-number">0xD168</span> =&gt; .LV,</span>
<span class="line" id="L363"> <span class="tok-number">0xD184</span> =&gt; .LV,</span>
<span class="line" id="L364"> <span class="tok-number">0xD1A0</span> =&gt; .LV,</span>
<span class="line" id="L365"> <span class="tok-number">0xD1BC</span> =&gt; .LV,</span>
<span class="line" id="L366"> <span class="tok-number">0xD1D8</span> =&gt; .LV,</span>
<span class="line" id="L367"> <span class="tok-number">0xD1F4</span> =&gt; .LV,</span>
<span class="line" id="L368"> <span class="tok-number">0xD210</span> =&gt; .LV,</span>
<span class="line" id="L369"> <span class="tok-number">0xD22C</span> =&gt; .LV,</span>
<span class="line" id="L370"> <span class="tok-number">0xD248</span> =&gt; .LV,</span>
<span class="line" id="L371"> <span class="tok-number">0xD264</span> =&gt; .LV,</span>
<span class="line" id="L372"> <span class="tok-number">0xD280</span> =&gt; .LV,</span>
<span class="line" id="L373"> <span class="tok-number">0xD29C</span> =&gt; .LV,</span>
<span class="line" id="L374"> <span class="tok-number">0xD2B8</span> =&gt; .LV,</span>
<span class="line" id="L375"> <span class="tok-number">0xD2D4</span> =&gt; .LV,</span>
<span class="line" id="L376"> <span class="tok-number">0xD2F0</span> =&gt; .LV,</span>
<span class="line" id="L377"> <span class="tok-number">0xD30C</span> =&gt; .LV,</span>
<span class="line" id="L378"> <span class="tok-number">0xD328</span> =&gt; .LV,</span>
<span class="line" id="L379"> <span class="tok-number">0xD344</span> =&gt; .LV,</span>
<span class="line" id="L380"> <span class="tok-number">0xD360</span> =&gt; .LV,</span>
<span class="line" id="L381"> <span class="tok-number">0xD37C</span> =&gt; .LV,</span>
<span class="line" id="L382"> <span class="tok-number">0xD398</span> =&gt; .LV,</span>
<span class="line" id="L383"> <span class="tok-number">0xD3B4</span> =&gt; .LV,</span>
<span class="line" id="L384"> <span class="tok-number">0xD3D0</span> =&gt; .LV,</span>
<span class="line" id="L385"> <span class="tok-number">0xD3EC</span> =&gt; .LV,</span>
<span class="line" id="L386"> <span class="tok-number">0xD408</span> =&gt; .LV,</span>
<span class="line" id="L387"> <span class="tok-number">0xD424</span> =&gt; .LV,</span>
<span class="line" id="L388"> <span class="tok-number">0xD440</span> =&gt; .LV,</span>
<span class="line" id="L389"> <span class="tok-number">0xD45C</span> =&gt; .LV,</span>
<span class="line" id="L390"> <span class="tok-number">0xD478</span> =&gt; .LV,</span>
<span class="line" id="L391"> <span class="tok-number">0xD494</span> =&gt; .LV,</span>
<span class="line" id="L392"> <span class="tok-number">0xD4B0</span> =&gt; .LV,</span>
<span class="line" id="L393"> <span class="tok-number">0xD4CC</span> =&gt; .LV,</span>
<span class="line" id="L394"> <span class="tok-number">0xD4E8</span> =&gt; .LV,</span>
<span class="line" id="L395"> <span class="tok-number">0xD504</span> =&gt; .LV,</span>
<span class="line" id="L396"> <span class="tok-number">0xD520</span> =&gt; .LV,</span>
<span class="line" id="L397"> <span class="tok-number">0xD53C</span> =&gt; .LV,</span>
<span class="line" id="L398"> <span class="tok-number">0xD558</span> =&gt; .LV,</span>
<span class="line" id="L399"> <span class="tok-number">0xD574</span> =&gt; .LV,</span>
<span class="line" id="L400"> <span class="tok-number">0xD590</span> =&gt; .LV,</span>
<span class="line" id="L401"> <span class="tok-number">0xD5AC</span> =&gt; .LV,</span>
<span class="line" id="L402"> <span class="tok-number">0xD5C8</span> =&gt; .LV,</span>
<span class="line" id="L403"> <span class="tok-number">0xD5E4</span> =&gt; .LV,</span>
<span class="line" id="L404"> <span class="tok-number">0xD600</span> =&gt; .LV,</span>
<span class="line" id="L405"> <span class="tok-number">0xD61C</span> =&gt; .LV,</span>
<span class="line" id="L406"> <span class="tok-number">0xD638</span> =&gt; .LV,</span>
<span class="line" id="L407"> <span class="tok-number">0xD654</span> =&gt; .LV,</span>
<span class="line" id="L408"> <span class="tok-number">0xD670</span> =&gt; .LV,</span>
<span class="line" id="L409"> <span class="tok-number">0xD68C</span> =&gt; .LV,</span>
<span class="line" id="L410"> <span class="tok-number">0xD6A8</span> =&gt; .LV,</span>
<span class="line" id="L411"> <span class="tok-number">0xD6C4</span> =&gt; .LV,</span>
<span class="line" id="L412"> <span class="tok-number">0xD6E0</span> =&gt; .LV,</span>
<span class="line" id="L413"> <span class="tok-number">0xD6FC</span> =&gt; .LV,</span>
<span class="line" id="L414"> <span class="tok-number">0xD718</span> =&gt; .LV,</span>
<span class="line" id="L415"> <span class="tok-number">0xD734</span> =&gt; .LV,</span>
<span class="line" id="L416"> <span class="tok-number">0xD750</span> =&gt; .LV,</span>
<span class="line" id="L417"> <span class="tok-number">0xD76C</span> =&gt; .LV,</span>
<span class="line" id="L418"> <span class="tok-number">0xD788</span> =&gt; .LV,</span>
<span class="line" id="L419"> <span class="tok-number">0xAC01</span>...<span class="tok-number">0xAC1B</span> =&gt; .LVT,</span>
<span class="line" id="L420"> <span class="tok-number">0xAC1D</span>...<span class="tok-number">0xAC37</span> =&gt; .LVT,</span>
<span class="line" id="L421"> <span class="tok-number">0xAC39</span>...<span class="tok-number">0xAC53</span> =&gt; .LVT,</span>
<span class="line" id="L422"> <span class="tok-number">0xAC55</span>...<span class="tok-number">0xAC6F</span> =&gt; .LVT,</span>
<span class="line" id="L423"> <span class="tok-number">0xAC71</span>...<span class="tok-number">0xAC8B</span> =&gt; .LVT,</span>
<span class="line" id="L424"> <span class="tok-number">0xAC8D</span>...<span class="tok-number">0xACA7</span> =&gt; .LVT,</span>
<span class="line" id="L425"> <span class="tok-number">0xACA9</span>...<span class="tok-number">0xACC3</span> =&gt; .LVT,</span>
<span class="line" id="L426"> <span class="tok-number">0xACC5</span>...<span class="tok-number">0xACDF</span> =&gt; .LVT,</span>
<span class="line" id="L427"> <span class="tok-number">0xACE1</span>...<span class="tok-number">0xACFB</span> =&gt; .LVT,</span>
<span class="line" id="L428"> <span class="tok-number">0xACFD</span>...<span class="tok-number">0xAD17</span> =&gt; .LVT,</span>
<span class="line" id="L429"> <span class="tok-number">0xAD19</span>...<span class="tok-number">0xAD33</span> =&gt; .LVT,</span>
<span class="line" id="L430"> <span class="tok-number">0xAD35</span>...<span class="tok-number">0xAD4F</span> =&gt; .LVT,</span>
<span class="line" id="L431"> <span class="tok-number">0xAD51</span>...<span class="tok-number">0xAD6B</span> =&gt; .LVT,</span>
<span class="line" id="L432"> <span class="tok-number">0xAD6D</span>...<span class="tok-number">0xAD87</span> =&gt; .LVT,</span>
<span class="line" id="L433"> <span class="tok-number">0xAD89</span>...<span class="tok-number">0xADA3</span> =&gt; .LVT,</span>
<span class="line" id="L434"> <span class="tok-number">0xADA5</span>...<span class="tok-number">0xADBF</span> =&gt; .LVT,</span>
<span class="line" id="L435"> <span class="tok-number">0xADC1</span>...<span class="tok-number">0xADDB</span> =&gt; .LVT,</span>
<span class="line" id="L436"> <span class="tok-number">0xADDD</span>...<span class="tok-number">0xADF7</span> =&gt; .LVT,</span>
<span class="line" id="L437"> <span class="tok-number">0xADF9</span>...<span class="tok-number">0xAE13</span> =&gt; .LVT,</span>
<span class="line" id="L438"> <span class="tok-number">0xAE15</span>...<span class="tok-number">0xAE2F</span> =&gt; .LVT,</span>
<span class="line" id="L439"> <span class="tok-number">0xAE31</span>...<span class="tok-number">0xAE4B</span> =&gt; .LVT,</span>
<span class="line" id="L440"> <span class="tok-number">0xAE4D</span>...<span class="tok-number">0xAE67</span> =&gt; .LVT,</span>
<span class="line" id="L441"> <span class="tok-number">0xAE69</span>...<span class="tok-number">0xAE83</span> =&gt; .LVT,</span>
<span class="line" id="L442"> <span class="tok-number">0xAE85</span>...<span class="tok-number">0xAE9F</span> =&gt; .LVT,</span>
<span class="line" id="L443"> <span class="tok-number">0xAEA1</span>...<span class="tok-number">0xAEBB</span> =&gt; .LVT,</span>
<span class="line" id="L444"> <span class="tok-number">0xAEBD</span>...<span class="tok-number">0xAED7</span> =&gt; .LVT,</span>
<span class="line" id="L445"> <span class="tok-number">0xAED9</span>...<span class="tok-number">0xAEF3</span> =&gt; .LVT,</span>
<span class="line" id="L446"> <span class="tok-number">0xAEF5</span>...<span class="tok-number">0xAF0F</span> =&gt; .LVT,</span>
<span class="line" id="L447"> <span class="tok-number">0xAF11</span>...<span class="tok-number">0xAF2B</span> =&gt; .LVT,</span>
<span class="line" id="L448"> <span class="tok-number">0xAF2D</span>...<span class="tok-number">0xAF47</span> =&gt; .LVT,</span>
<span class="line" id="L449"> <span class="tok-number">0xAF49</span>...<span class="tok-number">0xAF63</span> =&gt; .LVT,</span>
<span class="line" id="L450"> <span class="tok-number">0xAF65</span>...<span class="tok-number">0xAF7F</span> =&gt; .LVT,</span>
<span class="line" id="L451"> <span class="tok-number">0xAF81</span>...<span class="tok-number">0xAF9B</span> =&gt; .LVT,</span>
<span class="line" id="L452"> <span class="tok-number">0xAF9D</span>...<span class="tok-number">0xAFB7</span> =&gt; .LVT,</span>
<span class="line" id="L453"> <span class="tok-number">0xAFB9</span>...<span class="tok-number">0xAFD3</span> =&gt; .LVT,</span>
<span class="line" id="L454"> <span class="tok-number">0xAFD5</span>...<span class="tok-number">0xAFEF</span> =&gt; .LVT,</span>
<span class="line" id="L455"> <span class="tok-number">0xAFF1</span>...<span class="tok-number">0xB00B</span> =&gt; .LVT,</span>
<span class="line" id="L456"> <span class="tok-number">0xB00D</span>...<span class="tok-number">0xB027</span> =&gt; .LVT,</span>
<span class="line" id="L457"> <span class="tok-number">0xB029</span>...<span class="tok-number">0xB043</span> =&gt; .LVT,</span>
<span class="line" id="L458"> <span class="tok-number">0xB045</span>...<span class="tok-number">0xB05F</span> =&gt; .LVT,</span>
<span class="line" id="L459"> <span class="tok-number">0xB061</span>...<span class="tok-number">0xB07B</span> =&gt; .LVT,</span>
<span class="line" id="L460"> <span class="tok-number">0xB07D</span>...<span class="tok-number">0xB097</span> =&gt; .LVT,</span>
<span class="line" id="L461"> <span class="tok-number">0xB099</span>...<span class="tok-number">0xB0B3</span> =&gt; .LVT,</span>
<span class="line" id="L462"> <span class="tok-number">0xB0B5</span>...<span class="tok-number">0xB0CF</span> =&gt; .LVT,</span>
<span class="line" id="L463"> <span class="tok-number">0xB0D1</span>...<span class="tok-number">0xB0EB</span> =&gt; .LVT,</span>
<span class="line" id="L464"> <span class="tok-number">0xB0ED</span>...<span class="tok-number">0xB107</span> =&gt; .LVT,</span>
<span class="line" id="L465"> <span class="tok-number">0xB109</span>...<span class="tok-number">0xB123</span> =&gt; .LVT,</span>
<span class="line" id="L466"> <span class="tok-number">0xB125</span>...<span class="tok-number">0xB13F</span> =&gt; .LVT,</span>
<span class="line" id="L467"> <span class="tok-number">0xB141</span>...<span class="tok-number">0xB15B</span> =&gt; .LVT,</span>
<span class="line" id="L468"> <span class="tok-number">0xB15D</span>...<span class="tok-number">0xB177</span> =&gt; .LVT,</span>
<span class="line" id="L469"> <span class="tok-number">0xB179</span>...<span class="tok-number">0xB193</span> =&gt; .LVT,</span>
<span class="line" id="L470"> <span class="tok-number">0xB195</span>...<span class="tok-number">0xB1AF</span> =&gt; .LVT,</span>
<span class="line" id="L471"> <span class="tok-number">0xB1B1</span>...<span class="tok-number">0xB1CB</span> =&gt; .LVT,</span>
<span class="line" id="L472"> <span class="tok-number">0xB1CD</span>...<span class="tok-number">0xB1E7</span> =&gt; .LVT,</span>
<span class="line" id="L473"> <span class="tok-number">0xB1E9</span>...<span class="tok-number">0xB203</span> =&gt; .LVT,</span>
<span class="line" id="L474"> <span class="tok-number">0xB205</span>...<span class="tok-number">0xB21F</span> =&gt; .LVT,</span>
<span class="line" id="L475"> <span class="tok-number">0xB221</span>...<span class="tok-number">0xB23B</span> =&gt; .LVT,</span>
<span class="line" id="L476"> <span class="tok-number">0xB23D</span>...<span class="tok-number">0xB257</span> =&gt; .LVT,</span>
<span class="line" id="L477"> <span class="tok-number">0xB259</span>...<span class="tok-number">0xB273</span> =&gt; .LVT,</span>
<span class="line" id="L478"> <span class="tok-number">0xB275</span>...<span class="tok-number">0xB28F</span> =&gt; .LVT,</span>
<span class="line" id="L479"> <span class="tok-number">0xB291</span>...<span class="tok-number">0xB2AB</span> =&gt; .LVT,</span>
<span class="line" id="L480"> <span class="tok-number">0xB2AD</span>...<span class="tok-number">0xB2C7</span> =&gt; .LVT,</span>
<span class="line" id="L481"> <span class="tok-number">0xB2C9</span>...<span class="tok-number">0xB2E3</span> =&gt; .LVT,</span>
<span class="line" id="L482"> <span class="tok-number">0xB2E5</span>...<span class="tok-number">0xB2FF</span> =&gt; .LVT,</span>
<span class="line" id="L483"> <span class="tok-number">0xB301</span>...<span class="tok-number">0xB31B</span> =&gt; .LVT,</span>
<span class="line" id="L484"> <span class="tok-number">0xB31D</span>...<span class="tok-number">0xB337</span> =&gt; .LVT,</span>
<span class="line" id="L485"> <span class="tok-number">0xB339</span>...<span class="tok-number">0xB353</span> =&gt; .LVT,</span>
<span class="line" id="L486"> <span class="tok-number">0xB355</span>...<span class="tok-number">0xB36F</span> =&gt; .LVT,</span>
<span class="line" id="L487"> <span class="tok-number">0xB371</span>...<span class="tok-number">0xB38B</span> =&gt; .LVT,</span>
<span class="line" id="L488"> <span class="tok-number">0xB38D</span>...<span class="tok-number">0xB3A7</span> =&gt; .LVT,</span>
<span class="line" id="L489"> <span class="tok-number">0xB3A9</span>...<span class="tok-number">0xB3C3</span> =&gt; .LVT,</span>
<span class="line" id="L490"> <span class="tok-number">0xB3C5</span>...<span class="tok-number">0xB3DF</span> =&gt; .LVT,</span>
<span class="line" id="L491"> <span class="tok-number">0xB3E1</span>...<span class="tok-number">0xB3FB</span> =&gt; .LVT,</span>
<span class="line" id="L492"> <span class="tok-number">0xB3FD</span>...<span class="tok-number">0xB417</span> =&gt; .LVT,</span>
<span class="line" id="L493"> <span class="tok-number">0xB419</span>...<span class="tok-number">0xB433</span> =&gt; .LVT,</span>
<span class="line" id="L494"> <span class="tok-number">0xB435</span>...<span class="tok-number">0xB44F</span> =&gt; .LVT,</span>
<span class="line" id="L495"> <span class="tok-number">0xB451</span>...<span class="tok-number">0xB46B</span> =&gt; .LVT,</span>
<span class="line" id="L496"> <span class="tok-number">0xB46D</span>...<span class="tok-number">0xB487</span> =&gt; .LVT,</span>
<span class="line" id="L497"> <span class="tok-number">0xB489</span>...<span class="tok-number">0xB4A3</span> =&gt; .LVT,</span>
<span class="line" id="L498"> <span class="tok-number">0xB4A5</span>...<span class="tok-number">0xB4BF</span> =&gt; .LVT,</span>
<span class="line" id="L499"> <span class="tok-number">0xB4C1</span>...<span class="tok-number">0xB4DB</span> =&gt; .LVT,</span>
<span class="line" id="L500"> <span class="tok-number">0xB4DD</span>...<span class="tok-number">0xB4F7</span> =&gt; .LVT,</span>
<span class="line" id="L501"> <span class="tok-number">0xB4F9</span>...<span class="tok-number">0xB513</span> =&gt; .LVT,</span>
<span class="line" id="L502"> <span class="tok-number">0xB515</span>...<span class="tok-number">0xB52F</span> =&gt; .LVT,</span>
<span class="line" id="L503"> <span class="tok-number">0xB531</span>...<span class="tok-number">0xB54B</span> =&gt; .LVT,</span>
<span class="line" id="L504"> <span class="tok-number">0xB54D</span>...<span class="tok-number">0xB567</span> =&gt; .LVT,</span>
<span class="line" id="L505"> <span class="tok-number">0xB569</span>...<span class="tok-number">0xB583</span> =&gt; .LVT,</span>
<span class="line" id="L506"> <span class="tok-number">0xB585</span>...<span class="tok-number">0xB59F</span> =&gt; .LVT,</span>
<span class="line" id="L507"> <span class="tok-number">0xB5A1</span>...<span class="tok-number">0xB5BB</span> =&gt; .LVT,</span>
<span class="line" id="L508"> <span class="tok-number">0xB5BD</span>...<span class="tok-number">0xB5D7</span> =&gt; .LVT,</span>
<span class="line" id="L509"> <span class="tok-number">0xB5D9</span>...<span class="tok-number">0xB5F3</span> =&gt; .LVT,</span>
<span class="line" id="L510"> <span class="tok-number">0xB5F5</span>...<span class="tok-number">0xB60F</span> =&gt; .LVT,</span>
<span class="line" id="L511"> <span class="tok-number">0xB611</span>...<span class="tok-number">0xB62B</span> =&gt; .LVT,</span>
<span class="line" id="L512"> <span class="tok-number">0xB62D</span>...<span class="tok-number">0xB647</span> =&gt; .LVT,</span>
<span class="line" id="L513"> <span class="tok-number">0xB649</span>...<span class="tok-number">0xB663</span> =&gt; .LVT,</span>
<span class="line" id="L514"> <span class="tok-number">0xB665</span>...<span class="tok-number">0xB67F</span> =&gt; .LVT,</span>
<span class="line" id="L515"> <span class="tok-number">0xB681</span>...<span class="tok-number">0xB69B</span> =&gt; .LVT,</span>
<span class="line" id="L516"> <span class="tok-number">0xB69D</span>...<span class="tok-number">0xB6B7</span> =&gt; .LVT,</span>
<span class="line" id="L517"> <span class="tok-number">0xB6B9</span>...<span class="tok-number">0xB6D3</span> =&gt; .LVT,</span>
<span class="line" id="L518"> <span class="tok-number">0xB6D5</span>...<span class="tok-number">0xB6EF</span> =&gt; .LVT,</span>
<span class="line" id="L519"> <span class="tok-number">0xB6F1</span>...<span class="tok-number">0xB70B</span> =&gt; .LVT,</span>
<span class="line" id="L520"> <span class="tok-number">0xB70D</span>...<span class="tok-number">0xB727</span> =&gt; .LVT,</span>
<span class="line" id="L521"> <span class="tok-number">0xB729</span>...<span class="tok-number">0xB743</span> =&gt; .LVT,</span>
<span class="line" id="L522"> <span class="tok-number">0xB745</span>...<span class="tok-number">0xB75F</span> =&gt; .LVT,</span>
<span class="line" id="L523"> <span class="tok-number">0xB761</span>...<span class="tok-number">0xB77B</span> =&gt; .LVT,</span>
<span class="line" id="L524"> <span class="tok-number">0xB77D</span>...<span class="tok-number">0xB797</span> =&gt; .LVT,</span>
<span class="line" id="L525"> <span class="tok-number">0xB799</span>...<span class="tok-number">0xB7B3</span> =&gt; .LVT,</span>
<span class="line" id="L526"> <span class="tok-number">0xB7B5</span>...<span class="tok-number">0xB7CF</span> =&gt; .LVT,</span>
<span class="line" id="L527"> <span class="tok-number">0xB7D1</span>...<span class="tok-number">0xB7EB</span> =&gt; .LVT,</span>
<span class="line" id="L528"> <span class="tok-number">0xB7ED</span>...<span class="tok-number">0xB807</span> =&gt; .LVT,</span>
<span class="line" id="L529"> <span class="tok-number">0xB809</span>...<span class="tok-number">0xB823</span> =&gt; .LVT,</span>
<span class="line" id="L530"> <span class="tok-number">0xB825</span>...<span class="tok-number">0xB83F</span> =&gt; .LVT,</span>
<span class="line" id="L531"> <span class="tok-number">0xB841</span>...<span class="tok-number">0xB85B</span> =&gt; .LVT,</span>
<span class="line" id="L532"> <span class="tok-number">0xB85D</span>...<span class="tok-number">0xB877</span> =&gt; .LVT,</span>
<span class="line" id="L533"> <span class="tok-number">0xB879</span>...<span class="tok-number">0xB893</span> =&gt; .LVT,</span>
<span class="line" id="L534"> <span class="tok-number">0xB895</span>...<span class="tok-number">0xB8AF</span> =&gt; .LVT,</span>
<span class="line" id="L535"> <span class="tok-number">0xB8B1</span>...<span class="tok-number">0xB8CB</span> =&gt; .LVT,</span>
<span class="line" id="L536"> <span class="tok-number">0xB8CD</span>...<span class="tok-number">0xB8E7</span> =&gt; .LVT,</span>
<span class="line" id="L537"> <span class="tok-number">0xB8E9</span>...<span class="tok-number">0xB903</span> =&gt; .LVT,</span>
<span class="line" id="L538"> <span class="tok-number">0xB905</span>...<span class="tok-number">0xB91F</span> =&gt; .LVT,</span>
<span class="line" id="L539"> <span class="tok-number">0xB921</span>...<span class="tok-number">0xB93B</span> =&gt; .LVT,</span>
<span class="line" id="L540"> <span class="tok-number">0xB93D</span>...<span class="tok-number">0xB957</span> =&gt; .LVT,</span>
<span class="line" id="L541"> <span class="tok-number">0xB959</span>...<span class="tok-number">0xB973</span> =&gt; .LVT,</span>
<span class="line" id="L542"> <span class="tok-number">0xB975</span>...<span class="tok-number">0xB98F</span> =&gt; .LVT,</span>
<span class="line" id="L543"> <span class="tok-number">0xB991</span>...<span class="tok-number">0xB9AB</span> =&gt; .LVT,</span>
<span class="line" id="L544"> <span class="tok-number">0xB9AD</span>...<span class="tok-number">0xB9C7</span> =&gt; .LVT,</span>
<span class="line" id="L545"> <span class="tok-number">0xB9C9</span>...<span class="tok-number">0xB9E3</span> =&gt; .LVT,</span>
<span class="line" id="L546"> <span class="tok-number">0xB9E5</span>...<span class="tok-number">0xB9FF</span> =&gt; .LVT,</span>
<span class="line" id="L547"> <span class="tok-number">0xBA01</span>...<span class="tok-number">0xBA1B</span> =&gt; .LVT,</span>
<span class="line" id="L548"> <span class="tok-number">0xBA1D</span>...<span class="tok-number">0xBA37</span> =&gt; .LVT,</span>
<span class="line" id="L549"> <span class="tok-number">0xBA39</span>...<span class="tok-number">0xBA53</span> =&gt; .LVT,</span>
<span class="line" id="L550"> <span class="tok-number">0xBA55</span>...<span class="tok-number">0xBA6F</span> =&gt; .LVT,</span>
<span class="line" id="L551"> <span class="tok-number">0xBA71</span>...<span class="tok-number">0xBA8B</span> =&gt; .LVT,</span>
<span class="line" id="L552"> <span class="tok-number">0xBA8D</span>...<span class="tok-number">0xBAA7</span> =&gt; .LVT,</span>
<span class="line" id="L553"> <span class="tok-number">0xBAA9</span>...<span class="tok-number">0xBAC3</span> =&gt; .LVT,</span>
<span class="line" id="L554"> <span class="tok-number">0xBAC5</span>...<span class="tok-number">0xBADF</span> =&gt; .LVT,</span>
<span class="line" id="L555"> <span class="tok-number">0xBAE1</span>...<span class="tok-number">0xBAFB</span> =&gt; .LVT,</span>
<span class="line" id="L556"> <span class="tok-number">0xBAFD</span>...<span class="tok-number">0xBB17</span> =&gt; .LVT,</span>
<span class="line" id="L557"> <span class="tok-number">0xBB19</span>...<span class="tok-number">0xBB33</span> =&gt; .LVT,</span>
<span class="line" id="L558"> <span class="tok-number">0xBB35</span>...<span class="tok-number">0xBB4F</span> =&gt; .LVT,</span>
<span class="line" id="L559"> <span class="tok-number">0xBB51</span>...<span class="tok-number">0xBB6B</span> =&gt; .LVT,</span>
<span class="line" id="L560"> <span class="tok-number">0xBB6D</span>...<span class="tok-number">0xBB87</span> =&gt; .LVT,</span>
<span class="line" id="L561"> <span class="tok-number">0xBB89</span>...<span class="tok-number">0xBBA3</span> =&gt; .LVT,</span>
<span class="line" id="L562"> <span class="tok-number">0xBBA5</span>...<span class="tok-number">0xBBBF</span> =&gt; .LVT,</span>
<span class="line" id="L563"> <span class="tok-number">0xBBC1</span>...<span class="tok-number">0xBBDB</span> =&gt; .LVT,</span>
<span class="line" id="L564"> <span class="tok-number">0xBBDD</span>...<span class="tok-number">0xBBF7</span> =&gt; .LVT,</span>
<span class="line" id="L565"> <span class="tok-number">0xBBF9</span>...<span class="tok-number">0xBC13</span> =&gt; .LVT,</span>
<span class="line" id="L566"> <span class="tok-number">0xBC15</span>...<span class="tok-number">0xBC2F</span> =&gt; .LVT,</span>
<span class="line" id="L567"> <span class="tok-number">0xBC31</span>...<span class="tok-number">0xBC4B</span> =&gt; .LVT,</span>
<span class="line" id="L568"> <span class="tok-number">0xBC4D</span>...<span class="tok-number">0xBC67</span> =&gt; .LVT,</span>
<span class="line" id="L569"> <span class="tok-number">0xBC69</span>...<span class="tok-number">0xBC83</span> =&gt; .LVT,</span>
<span class="line" id="L570"> <span class="tok-number">0xBC85</span>...<span class="tok-number">0xBC9F</span> =&gt; .LVT,</span>
<span class="line" id="L571"> <span class="tok-number">0xBCA1</span>...<span class="tok-number">0xBCBB</span> =&gt; .LVT,</span>
<span class="line" id="L572"> <span class="tok-number">0xBCBD</span>...<span class="tok-number">0xBCD7</span> =&gt; .LVT,</span>
<span class="line" id="L573"> <span class="tok-number">0xBCD9</span>...<span class="tok-number">0xBCF3</span> =&gt; .LVT,</span>
<span class="line" id="L574"> <span class="tok-number">0xBCF5</span>...<span class="tok-number">0xBD0F</span> =&gt; .LVT,</span>
<span class="line" id="L575"> <span class="tok-number">0xBD11</span>...<span class="tok-number">0xBD2B</span> =&gt; .LVT,</span>
<span class="line" id="L576"> <span class="tok-number">0xBD2D</span>...<span class="tok-number">0xBD47</span> =&gt; .LVT,</span>
<span class="line" id="L577"> <span class="tok-number">0xBD49</span>...<span class="tok-number">0xBD63</span> =&gt; .LVT,</span>
<span class="line" id="L578"> <span class="tok-number">0xBD65</span>...<span class="tok-number">0xBD7F</span> =&gt; .LVT,</span>
<span class="line" id="L579"> <span class="tok-number">0xBD81</span>...<span class="tok-number">0xBD9B</span> =&gt; .LVT,</span>
<span class="line" id="L580"> <span class="tok-number">0xBD9D</span>...<span class="tok-number">0xBDB7</span> =&gt; .LVT,</span>
<span class="line" id="L581"> <span class="tok-number">0xBDB9</span>...<span class="tok-number">0xBDD3</span> =&gt; .LVT,</span>
<span class="line" id="L582"> <span class="tok-number">0xBDD5</span>...<span class="tok-number">0xBDEF</span> =&gt; .LVT,</span>
<span class="line" id="L583"> <span class="tok-number">0xBDF1</span>...<span class="tok-number">0xBE0B</span> =&gt; .LVT,</span>
<span class="line" id="L584"> <span class="tok-number">0xBE0D</span>...<span class="tok-number">0xBE27</span> =&gt; .LVT,</span>
<span class="line" id="L585"> <span class="tok-number">0xBE29</span>...<span class="tok-number">0xBE43</span> =&gt; .LVT,</span>
<span class="line" id="L586"> <span class="tok-number">0xBE45</span>...<span class="tok-number">0xBE5F</span> =&gt; .LVT,</span>
<span class="line" id="L587"> <span class="tok-number">0xBE61</span>...<span class="tok-number">0xBE7B</span> =&gt; .LVT,</span>
<span class="line" id="L588"> <span class="tok-number">0xBE7D</span>...<span class="tok-number">0xBE97</span> =&gt; .LVT,</span>
<span class="line" id="L589"> <span class="tok-number">0xBE99</span>...<span class="tok-number">0xBEB3</span> =&gt; .LVT,</span>
<span class="line" id="L590"> <span class="tok-number">0xBEB5</span>...<span class="tok-number">0xBECF</span> =&gt; .LVT,</span>
<span class="line" id="L591"> <span class="tok-number">0xBED1</span>...<span class="tok-number">0xBEEB</span> =&gt; .LVT,</span>
<span class="line" id="L592"> <span class="tok-number">0xBEED</span>...<span class="tok-number">0xBF07</span> =&gt; .LVT,</span>
<span class="line" id="L593"> <span class="tok-number">0xBF09</span>...<span class="tok-number">0xBF23</span> =&gt; .LVT,</span>
<span class="line" id="L594"> <span class="tok-number">0xBF25</span>...<span class="tok-number">0xBF3F</span> =&gt; .LVT,</span>
<span class="line" id="L595"> <span class="tok-number">0xBF41</span>...<span class="tok-number">0xBF5B</span> =&gt; .LVT,</span>
<span class="line" id="L596"> <span class="tok-number">0xBF5D</span>...<span class="tok-number">0xBF77</span> =&gt; .LVT,</span>
<span class="line" id="L597"> <span class="tok-number">0xBF79</span>...<span class="tok-number">0xBF93</span> =&gt; .LVT,</span>
<span class="line" id="L598"> <span class="tok-number">0xBF95</span>...<span class="tok-number">0xBFAF</span> =&gt; .LVT,</span>
<span class="line" id="L599"> <span class="tok-number">0xBFB1</span>...<span class="tok-number">0xBFCB</span> =&gt; .LVT,</span>
<span class="line" id="L600"> <span class="tok-number">0xBFCD</span>...<span class="tok-number">0xBFE7</span> =&gt; .LVT,</span>
<span class="line" id="L601"> <span class="tok-number">0xBFE9</span>...<span class="tok-number">0xC003</span> =&gt; .LVT,</span>
<span class="line" id="L602"> <span class="tok-number">0xC005</span>...<span class="tok-number">0xC01F</span> =&gt; .LVT,</span>
<span class="line" id="L603"> <span class="tok-number">0xC021</span>...<span class="tok-number">0xC03B</span> =&gt; .LVT,</span>
<span class="line" id="L604"> <span class="tok-number">0xC03D</span>...<span class="tok-number">0xC057</span> =&gt; .LVT,</span>
<span class="line" id="L605"> <span class="tok-number">0xC059</span>...<span class="tok-number">0xC073</span> =&gt; .LVT,</span>
<span class="line" id="L606"> <span class="tok-number">0xC075</span>...<span class="tok-number">0xC08F</span> =&gt; .LVT,</span>
<span class="line" id="L607"> <span class="tok-number">0xC091</span>...<span class="tok-number">0xC0AB</span> =&gt; .LVT,</span>
<span class="line" id="L608"> <span class="tok-number">0xC0AD</span>...<span class="tok-number">0xC0C7</span> =&gt; .LVT,</span>
<span class="line" id="L609"> <span class="tok-number">0xC0C9</span>...<span class="tok-number">0xC0E3</span> =&gt; .LVT,</span>
<span class="line" id="L610"> <span class="tok-number">0xC0E5</span>...<span class="tok-number">0xC0FF</span> =&gt; .LVT,</span>
<span class="line" id="L611"> <span class="tok-number">0xC101</span>...<span class="tok-number">0xC11B</span> =&gt; .LVT,</span>
<span class="line" id="L612"> <span class="tok-number">0xC11D</span>...<span class="tok-number">0xC137</span> =&gt; .LVT,</span>
<span class="line" id="L613"> <span class="tok-number">0xC139</span>...<span class="tok-number">0xC153</span> =&gt; .LVT,</span>
<span class="line" id="L614"> <span class="tok-number">0xC155</span>...<span class="tok-number">0xC16F</span> =&gt; .LVT,</span>
<span class="line" id="L615"> <span class="tok-number">0xC171</span>...<span class="tok-number">0xC18B</span> =&gt; .LVT,</span>
<span class="line" id="L616"> <span class="tok-number">0xC18D</span>...<span class="tok-number">0xC1A7</span> =&gt; .LVT,</span>
<span class="line" id="L617"> <span class="tok-number">0xC1A9</span>...<span class="tok-number">0xC1C3</span> =&gt; .LVT,</span>
<span class="line" id="L618"> <span class="tok-number">0xC1C5</span>...<span class="tok-number">0xC1DF</span> =&gt; .LVT,</span>
<span class="line" id="L619"> <span class="tok-number">0xC1E1</span>...<span class="tok-number">0xC1FB</span> =&gt; .LVT,</span>
<span class="line" id="L620"> <span class="tok-number">0xC1FD</span>...<span class="tok-number">0xC217</span> =&gt; .LVT,</span>
<span class="line" id="L621"> <span class="tok-number">0xC219</span>...<span class="tok-number">0xC233</span> =&gt; .LVT,</span>
<span class="line" id="L622"> <span class="tok-number">0xC235</span>...<span class="tok-number">0xC24F</span> =&gt; .LVT,</span>
<span class="line" id="L623"> <span class="tok-number">0xC251</span>...<span class="tok-number">0xC26B</span> =&gt; .LVT,</span>
<span class="line" id="L624"> <span class="tok-number">0xC26D</span>...<span class="tok-number">0xC287</span> =&gt; .LVT,</span>
<span class="line" id="L625"> <span class="tok-number">0xC289</span>...<span class="tok-number">0xC2A3</span> =&gt; .LVT,</span>
<span class="line" id="L626"> <span class="tok-number">0xC2A5</span>...<span class="tok-number">0xC2BF</span> =&gt; .LVT,</span>
<span class="line" id="L627"> <span class="tok-number">0xC2C1</span>...<span class="tok-number">0xC2DB</span> =&gt; .LVT,</span>
<span class="line" id="L628"> <span class="tok-number">0xC2DD</span>...<span class="tok-number">0xC2F7</span> =&gt; .LVT,</span>
<span class="line" id="L629"> <span class="tok-number">0xC2F9</span>...<span class="tok-number">0xC313</span> =&gt; .LVT,</span>
<span class="line" id="L630"> <span class="tok-number">0xC315</span>...<span class="tok-number">0xC32F</span> =&gt; .LVT,</span>
<span class="line" id="L631"> <span class="tok-number">0xC331</span>...<span class="tok-number">0xC34B</span> =&gt; .LVT,</span>
<span class="line" id="L632"> <span class="tok-number">0xC34D</span>...<span class="tok-number">0xC367</span> =&gt; .LVT,</span>
<span class="line" id="L633"> <span class="tok-number">0xC369</span>...<span class="tok-number">0xC383</span> =&gt; .LVT,</span>
<span class="line" id="L634"> <span class="tok-number">0xC385</span>...<span class="tok-number">0xC39F</span> =&gt; .LVT,</span>
<span class="line" id="L635"> <span class="tok-number">0xC3A1</span>...<span class="tok-number">0xC3BB</span> =&gt; .LVT,</span>
<span class="line" id="L636"> <span class="tok-number">0xC3BD</span>...<span class="tok-number">0xC3D7</span> =&gt; .LVT,</span>
<span class="line" id="L637"> <span class="tok-number">0xC3D9</span>...<span class="tok-number">0xC3F3</span> =&gt; .LVT,</span>
<span class="line" id="L638"> <span class="tok-number">0xC3F5</span>...<span class="tok-number">0xC40F</span> =&gt; .LVT,</span>
<span class="line" id="L639"> <span class="tok-number">0xC411</span>...<span class="tok-number">0xC42B</span> =&gt; .LVT,</span>
<span class="line" id="L640"> <span class="tok-number">0xC42D</span>...<span class="tok-number">0xC447</span> =&gt; .LVT,</span>
<span class="line" id="L641"> <span class="tok-number">0xC449</span>...<span class="tok-number">0xC463</span> =&gt; .LVT,</span>
<span class="line" id="L642"> <span class="tok-number">0xC465</span>...<span class="tok-number">0xC47F</span> =&gt; .LVT,</span>
<span class="line" id="L643"> <span class="tok-number">0xC481</span>...<span class="tok-number">0xC49B</span> =&gt; .LVT,</span>
<span class="line" id="L644"> <span class="tok-number">0xC49D</span>...<span class="tok-number">0xC4B7</span> =&gt; .LVT,</span>
<span class="line" id="L645"> <span class="tok-number">0xC4B9</span>...<span class="tok-number">0xC4D3</span> =&gt; .LVT,</span>
<span class="line" id="L646"> <span class="tok-number">0xC4D5</span>...<span class="tok-number">0xC4EF</span> =&gt; .LVT,</span>
<span class="line" id="L647"> <span class="tok-number">0xC4F1</span>...<span class="tok-number">0xC50B</span> =&gt; .LVT,</span>
<span class="line" id="L648"> <span class="tok-number">0xC50D</span>...<span class="tok-number">0xC527</span> =&gt; .LVT,</span>
<span class="line" id="L649"> <span class="tok-number">0xC529</span>...<span class="tok-number">0xC543</span> =&gt; .LVT,</span>
<span class="line" id="L650"> <span class="tok-number">0xC545</span>...<span class="tok-number">0xC55F</span> =&gt; .LVT,</span>
<span class="line" id="L651"> <span class="tok-number">0xC561</span>...<span class="tok-number">0xC57B</span> =&gt; .LVT,</span>
<span class="line" id="L652"> <span class="tok-number">0xC57D</span>...<span class="tok-number">0xC597</span> =&gt; .LVT,</span>
<span class="line" id="L653"> <span class="tok-number">0xC599</span>...<span class="tok-number">0xC5B3</span> =&gt; .LVT,</span>
<span class="line" id="L654"> <span class="tok-number">0xC5B5</span>...<span class="tok-number">0xC5CF</span> =&gt; .LVT,</span>
<span class="line" id="L655"> <span class="tok-number">0xC5D1</span>...<span class="tok-number">0xC5EB</span> =&gt; .LVT,</span>
<span class="line" id="L656"> <span class="tok-number">0xC5ED</span>...<span class="tok-number">0xC607</span> =&gt; .LVT,</span>
<span class="line" id="L657"> <span class="tok-number">0xC609</span>...<span class="tok-number">0xC623</span> =&gt; .LVT,</span>
<span class="line" id="L658"> <span class="tok-number">0xC625</span>...<span class="tok-number">0xC63F</span> =&gt; .LVT,</span>
<span class="line" id="L659"> <span class="tok-number">0xC641</span>...<span class="tok-number">0xC65B</span> =&gt; .LVT,</span>
<span class="line" id="L660"> <span class="tok-number">0xC65D</span>...<span class="tok-number">0xC677</span> =&gt; .LVT,</span>
<span class="line" id="L661"> <span class="tok-number">0xC679</span>...<span class="tok-number">0xC693</span> =&gt; .LVT,</span>
<span class="line" id="L662"> <span class="tok-number">0xC695</span>...<span class="tok-number">0xC6AF</span> =&gt; .LVT,</span>
<span class="line" id="L663"> <span class="tok-number">0xC6B1</span>...<span class="tok-number">0xC6CB</span> =&gt; .LVT,</span>
<span class="line" id="L664"> <span class="tok-number">0xC6CD</span>...<span class="tok-number">0xC6E7</span> =&gt; .LVT,</span>
<span class="line" id="L665"> <span class="tok-number">0xC6E9</span>...<span class="tok-number">0xC703</span> =&gt; .LVT,</span>
<span class="line" id="L666"> <span class="tok-number">0xC705</span>...<span class="tok-number">0xC71F</span> =&gt; .LVT,</span>
<span class="line" id="L667"> <span class="tok-number">0xC721</span>...<span class="tok-number">0xC73B</span> =&gt; .LVT,</span>
<span class="line" id="L668"> <span class="tok-number">0xC73D</span>...<span class="tok-number">0xC757</span> =&gt; .LVT,</span>
<span class="line" id="L669"> <span class="tok-number">0xC759</span>...<span class="tok-number">0xC773</span> =&gt; .LVT,</span>
<span class="line" id="L670"> <span class="tok-number">0xC775</span>...<span class="tok-number">0xC78F</span> =&gt; .LVT,</span>
<span class="line" id="L671"> <span class="tok-number">0xC791</span>...<span class="tok-number">0xC7AB</span> =&gt; .LVT,</span>
<span class="line" id="L672"> <span class="tok-number">0xC7AD</span>...<span class="tok-number">0xC7C7</span> =&gt; .LVT,</span>
<span class="line" id="L673"> <span class="tok-number">0xC7C9</span>...<span class="tok-number">0xC7E3</span> =&gt; .LVT,</span>
<span class="line" id="L674"> <span class="tok-number">0xC7E5</span>...<span class="tok-number">0xC7FF</span> =&gt; .LVT,</span>
<span class="line" id="L675"> <span class="tok-number">0xC801</span>...<span class="tok-number">0xC81B</span> =&gt; .LVT,</span>
<span class="line" id="L676"> <span class="tok-number">0xC81D</span>...<span class="tok-number">0xC837</span> =&gt; .LVT,</span>
<span class="line" id="L677"> <span class="tok-number">0xC839</span>...<span class="tok-number">0xC853</span> =&gt; .LVT,</span>
<span class="line" id="L678"> <span class="tok-number">0xC855</span>...<span class="tok-number">0xC86F</span> =&gt; .LVT,</span>
<span class="line" id="L679"> <span class="tok-number">0xC871</span>...<span class="tok-number">0xC88B</span> =&gt; .LVT,</span>
<span class="line" id="L680"> <span class="tok-number">0xC88D</span>...<span class="tok-number">0xC8A7</span> =&gt; .LVT,</span>
<span class="line" id="L681"> <span class="tok-number">0xC8A9</span>...<span class="tok-number">0xC8C3</span> =&gt; .LVT,</span>
<span class="line" id="L682"> <span class="tok-number">0xC8C5</span>...<span class="tok-number">0xC8DF</span> =&gt; .LVT,</span>
<span class="line" id="L683"> <span class="tok-number">0xC8E1</span>...<span class="tok-number">0xC8FB</span> =&gt; .LVT,</span>
<span class="line" id="L684"> <span class="tok-number">0xC8FD</span>...<span class="tok-number">0xC917</span> =&gt; .LVT,</span>
<span class="line" id="L685"> <span class="tok-number">0xC919</span>...<span class="tok-number">0xC933</span> =&gt; .LVT,</span>
<span class="line" id="L686"> <span class="tok-number">0xC935</span>...<span class="tok-number">0xC94F</span> =&gt; .LVT,</span>
<span class="line" id="L687"> <span class="tok-number">0xC951</span>...<span class="tok-number">0xC96B</span> =&gt; .LVT,</span>
<span class="line" id="L688"> <span class="tok-number">0xC96D</span>...<span class="tok-number">0xC987</span> =&gt; .LVT,</span>
<span class="line" id="L689"> <span class="tok-number">0xC989</span>...<span class="tok-number">0xC9A3</span> =&gt; .LVT,</span>
<span class="line" id="L690"> <span class="tok-number">0xC9A5</span>...<span class="tok-number">0xC9BF</span> =&gt; .LVT,</span>
<span class="line" id="L691"> <span class="tok-number">0xC9C1</span>...<span class="tok-number">0xC9DB</span> =&gt; .LVT,</span>
<span class="line" id="L692"> <span class="tok-number">0xC9DD</span>...<span class="tok-number">0xC9F7</span> =&gt; .LVT,</span>
<span class="line" id="L693"> <span class="tok-number">0xC9F9</span>...<span class="tok-number">0xCA13</span> =&gt; .LVT,</span>
<span class="line" id="L694"> <span class="tok-number">0xCA15</span>...<span class="tok-number">0xCA2F</span> =&gt; .LVT,</span>
<span class="line" id="L695"> <span class="tok-number">0xCA31</span>...<span class="tok-number">0xCA4B</span> =&gt; .LVT,</span>
<span class="line" id="L696"> <span class="tok-number">0xCA4D</span>...<span class="tok-number">0xCA67</span> =&gt; .LVT,</span>
<span class="line" id="L697"> <span class="tok-number">0xCA69</span>...<span class="tok-number">0xCA83</span> =&gt; .LVT,</span>
<span class="line" id="L698"> <span class="tok-number">0xCA85</span>...<span class="tok-number">0xCA9F</span> =&gt; .LVT,</span>
<span class="line" id="L699"> <span class="tok-number">0xCAA1</span>...<span class="tok-number">0xCABB</span> =&gt; .LVT,</span>
<span class="line" id="L700"> <span class="tok-number">0xCABD</span>...<span class="tok-number">0xCAD7</span> =&gt; .LVT,</span>
<span class="line" id="L701"> <span class="tok-number">0xCAD9</span>...<span class="tok-number">0xCAF3</span> =&gt; .LVT,</span>
<span class="line" id="L702"> <span class="tok-number">0xCAF5</span>...<span class="tok-number">0xCB0F</span> =&gt; .LVT,</span>
<span class="line" id="L703"> <span class="tok-number">0xCB11</span>...<span class="tok-number">0xCB2B</span> =&gt; .LVT,</span>
<span class="line" id="L704"> <span class="tok-number">0xCB2D</span>...<span class="tok-number">0xCB47</span> =&gt; .LVT,</span>
<span class="line" id="L705"> <span class="tok-number">0xCB49</span>...<span class="tok-number">0xCB63</span> =&gt; .LVT,</span>
<span class="line" id="L706"> <span class="tok-number">0xCB65</span>...<span class="tok-number">0xCB7F</span> =&gt; .LVT,</span>
<span class="line" id="L707"> <span class="tok-number">0xCB81</span>...<span class="tok-number">0xCB9B</span> =&gt; .LVT,</span>
<span class="line" id="L708"> <span class="tok-number">0xCB9D</span>...<span class="tok-number">0xCBB7</span> =&gt; .LVT,</span>
<span class="line" id="L709"> <span class="tok-number">0xCBB9</span>...<span class="tok-number">0xCBD3</span> =&gt; .LVT,</span>
<span class="line" id="L710"> <span class="tok-number">0xCBD5</span>...<span class="tok-number">0xCBEF</span> =&gt; .LVT,</span>
<span class="line" id="L711"> <span class="tok-number">0xCBF1</span>...<span class="tok-number">0xCC0B</span> =&gt; .LVT,</span>
<span class="line" id="L712"> <span class="tok-number">0xCC0D</span>...<span class="tok-number">0xCC27</span> =&gt; .LVT,</span>
<span class="line" id="L713"> <span class="tok-number">0xCC29</span>...<span class="tok-number">0xCC43</span> =&gt; .LVT,</span>
<span class="line" id="L714"> <span class="tok-number">0xCC45</span>...<span class="tok-number">0xCC5F</span> =&gt; .LVT,</span>
<span class="line" id="L715"> <span class="tok-number">0xCC61</span>...<span class="tok-number">0xCC7B</span> =&gt; .LVT,</span>
<span class="line" id="L716"> <span class="tok-number">0xCC7D</span>...<span class="tok-number">0xCC97</span> =&gt; .LVT,</span>
<span class="line" id="L717"> <span class="tok-number">0xCC99</span>...<span class="tok-number">0xCCB3</span> =&gt; .LVT,</span>
<span class="line" id="L718"> <span class="tok-number">0xCCB5</span>...<span class="tok-number">0xCCCF</span> =&gt; .LVT,</span>
<span class="line" id="L719"> <span class="tok-number">0xCCD1</span>...<span class="tok-number">0xCCEB</span> =&gt; .LVT,</span>
<span class="line" id="L720"> <span class="tok-number">0xCCED</span>...<span class="tok-number">0xCD07</span> =&gt; .LVT,</span>
<span class="line" id="L721"> <span class="tok-number">0xCD09</span>...<span class="tok-number">0xCD23</span> =&gt; .LVT,</span>
<span class="line" id="L722"> <span class="tok-number">0xCD25</span>...<span class="tok-number">0xCD3F</span> =&gt; .LVT,</span>
<span class="line" id="L723"> <span class="tok-number">0xCD41</span>...<span class="tok-number">0xCD5B</span> =&gt; .LVT,</span>
<span class="line" id="L724"> <span class="tok-number">0xCD5D</span>...<span class="tok-number">0xCD77</span> =&gt; .LVT,</span>
<span class="line" id="L725"> <span class="tok-number">0xCD79</span>...<span class="tok-number">0xCD93</span> =&gt; .LVT,</span>
<span class="line" id="L726"> <span class="tok-number">0xCD95</span>...<span class="tok-number">0xCDAF</span> =&gt; .LVT,</span>
<span class="line" id="L727"> <span class="tok-number">0xCDB1</span>...<span class="tok-number">0xCDCB</span> =&gt; .LVT,</span>
<span class="line" id="L728"> <span class="tok-number">0xCDCD</span>...<span class="tok-number">0xCDE7</span> =&gt; .LVT,</span>
<span class="line" id="L729"> <span class="tok-number">0xCDE9</span>...<span class="tok-number">0xCE03</span> =&gt; .LVT,</span>
<span class="line" id="L730"> <span class="tok-number">0xCE05</span>...<span class="tok-number">0xCE1F</span> =&gt; .LVT,</span>
<span class="line" id="L731"> <span class="tok-number">0xCE21</span>...<span class="tok-number">0xCE3B</span> =&gt; .LVT,</span>
<span class="line" id="L732"> <span class="tok-number">0xCE3D</span>...<span class="tok-number">0xCE57</span> =&gt; .LVT,</span>
<span class="line" id="L733"> <span class="tok-number">0xCE59</span>...<span class="tok-number">0xCE73</span> =&gt; .LVT,</span>
<span class="line" id="L734"> <span class="tok-number">0xCE75</span>...<span class="tok-number">0xCE8F</span> =&gt; .LVT,</span>
<span class="line" id="L735"> <span class="tok-number">0xCE91</span>...<span class="tok-number">0xCEAB</span> =&gt; .LVT,</span>
<span class="line" id="L736"> <span class="tok-number">0xCEAD</span>...<span class="tok-number">0xCEC7</span> =&gt; .LVT,</span>
<span class="line" id="L737"> <span class="tok-number">0xCEC9</span>...<span class="tok-number">0xCEE3</span> =&gt; .LVT,</span>
<span class="line" id="L738"> <span class="tok-number">0xCEE5</span>...<span class="tok-number">0xCEFF</span> =&gt; .LVT,</span>
<span class="line" id="L739"> <span class="tok-number">0xCF01</span>...<span class="tok-number">0xCF1B</span> =&gt; .LVT,</span>
<span class="line" id="L740"> <span class="tok-number">0xCF1D</span>...<span class="tok-number">0xCF37</span> =&gt; .LVT,</span>
<span class="line" id="L741"> <span class="tok-number">0xCF39</span>...<span class="tok-number">0xCF53</span> =&gt; .LVT,</span>
<span class="line" id="L742"> <span class="tok-number">0xCF55</span>...<span class="tok-number">0xCF6F</span> =&gt; .LVT,</span>
<span class="line" id="L743"> <span class="tok-number">0xCF71</span>...<span class="tok-number">0xCF8B</span> =&gt; .LVT,</span>
<span class="line" id="L744"> <span class="tok-number">0xCF8D</span>...<span class="tok-number">0xCFA7</span> =&gt; .LVT,</span>
<span class="line" id="L745"> <span class="tok-number">0xCFA9</span>...<span class="tok-number">0xCFC3</span> =&gt; .LVT,</span>
<span class="line" id="L746"> <span class="tok-number">0xCFC5</span>...<span class="tok-number">0xCFDF</span> =&gt; .LVT,</span>
<span class="line" id="L747"> <span class="tok-number">0xCFE1</span>...<span class="tok-number">0xCFFB</span> =&gt; .LVT,</span>
<span class="line" id="L748"> <span class="tok-number">0xCFFD</span>...<span class="tok-number">0xD017</span> =&gt; .LVT,</span>
<span class="line" id="L749"> <span class="tok-number">0xD019</span>...<span class="tok-number">0xD033</span> =&gt; .LVT,</span>
<span class="line" id="L750"> <span class="tok-number">0xD035</span>...<span class="tok-number">0xD04F</span> =&gt; .LVT,</span>
<span class="line" id="L751"> <span class="tok-number">0xD051</span>...<span class="tok-number">0xD06B</span> =&gt; .LVT,</span>
<span class="line" id="L752"> <span class="tok-number">0xD06D</span>...<span class="tok-number">0xD087</span> =&gt; .LVT,</span>
<span class="line" id="L753"> <span class="tok-number">0xD089</span>...<span class="tok-number">0xD0A3</span> =&gt; .LVT,</span>
<span class="line" id="L754"> <span class="tok-number">0xD0A5</span>...<span class="tok-number">0xD0BF</span> =&gt; .LVT,</span>
<span class="line" id="L755"> <span class="tok-number">0xD0C1</span>...<span class="tok-number">0xD0DB</span> =&gt; .LVT,</span>
<span class="line" id="L756"> <span class="tok-number">0xD0DD</span>...<span class="tok-number">0xD0F7</span> =&gt; .LVT,</span>
<span class="line" id="L757"> <span class="tok-number">0xD0F9</span>...<span class="tok-number">0xD113</span> =&gt; .LVT,</span>
<span class="line" id="L758"> <span class="tok-number">0xD115</span>...<span class="tok-number">0xD12F</span> =&gt; .LVT,</span>
<span class="line" id="L759"> <span class="tok-number">0xD131</span>...<span class="tok-number">0xD14B</span> =&gt; .LVT,</span>
<span class="line" id="L760"> <span class="tok-number">0xD14D</span>...<span class="tok-number">0xD167</span> =&gt; .LVT,</span>
<span class="line" id="L761"> <span class="tok-number">0xD169</span>...<span class="tok-number">0xD183</span> =&gt; .LVT,</span>
<span class="line" id="L762"> <span class="tok-number">0xD185</span>...<span class="tok-number">0xD19F</span> =&gt; .LVT,</span>
<span class="line" id="L763"> <span class="tok-number">0xD1A1</span>...<span class="tok-number">0xD1BB</span> =&gt; .LVT,</span>
<span class="line" id="L764"> <span class="tok-number">0xD1BD</span>...<span class="tok-number">0xD1D7</span> =&gt; .LVT,</span>
<span class="line" id="L765"> <span class="tok-number">0xD1D9</span>...<span class="tok-number">0xD1F3</span> =&gt; .LVT,</span>
<span class="line" id="L766"> <span class="tok-number">0xD1F5</span>...<span class="tok-number">0xD20F</span> =&gt; .LVT,</span>
<span class="line" id="L767"> <span class="tok-number">0xD211</span>...<span class="tok-number">0xD22B</span> =&gt; .LVT,</span>
<span class="line" id="L768"> <span class="tok-number">0xD22D</span>...<span class="tok-number">0xD247</span> =&gt; .LVT,</span>
<span class="line" id="L769"> <span class="tok-number">0xD249</span>...<span class="tok-number">0xD263</span> =&gt; .LVT,</span>
<span class="line" id="L770"> <span class="tok-number">0xD265</span>...<span class="tok-number">0xD27F</span> =&gt; .LVT,</span>
<span class="line" id="L771"> <span class="tok-number">0xD281</span>...<span class="tok-number">0xD29B</span> =&gt; .LVT,</span>
<span class="line" id="L772"> <span class="tok-number">0xD29D</span>...<span class="tok-number">0xD2B7</span> =&gt; .LVT,</span>
<span class="line" id="L773"> <span class="tok-number">0xD2B9</span>...<span class="tok-number">0xD2D3</span> =&gt; .LVT,</span>
<span class="line" id="L774"> <span class="tok-number">0xD2D5</span>...<span class="tok-number">0xD2EF</span> =&gt; .LVT,</span>
<span class="line" id="L775"> <span class="tok-number">0xD2F1</span>...<span class="tok-number">0xD30B</span> =&gt; .LVT,</span>
<span class="line" id="L776"> <span class="tok-number">0xD30D</span>...<span class="tok-number">0xD327</span> =&gt; .LVT,</span>
<span class="line" id="L777"> <span class="tok-number">0xD329</span>...<span class="tok-number">0xD343</span> =&gt; .LVT,</span>
<span class="line" id="L778"> <span class="tok-number">0xD345</span>...<span class="tok-number">0xD35F</span> =&gt; .LVT,</span>
<span class="line" id="L779"> <span class="tok-number">0xD361</span>...<span class="tok-number">0xD37B</span> =&gt; .LVT,</span>
<span class="line" id="L780"> <span class="tok-number">0xD37D</span>...<span class="tok-number">0xD397</span> =&gt; .LVT,</span>
<span class="line" id="L781"> <span class="tok-number">0xD399</span>...<span class="tok-number">0xD3B3</span> =&gt; .LVT,</span>
<span class="line" id="L782"> <span class="tok-number">0xD3B5</span>...<span class="tok-number">0xD3CF</span> =&gt; .LVT,</span>
<span class="line" id="L783"> <span class="tok-number">0xD3D1</span>...<span class="tok-number">0xD3EB</span> =&gt; .LVT,</span>
<span class="line" id="L784"> <span class="tok-number">0xD3ED</span>...<span class="tok-number">0xD407</span> =&gt; .LVT,</span>
<span class="line" id="L785"> <span class="tok-number">0xD409</span>...<span class="tok-number">0xD423</span> =&gt; .LVT,</span>
<span class="line" id="L786"> <span class="tok-number">0xD425</span>...<span class="tok-number">0xD43F</span> =&gt; .LVT,</span>
<span class="line" id="L787"> <span class="tok-number">0xD441</span>...<span class="tok-number">0xD45B</span> =&gt; .LVT,</span>
<span class="line" id="L788"> <span class="tok-number">0xD45D</span>...<span class="tok-number">0xD477</span> =&gt; .LVT,</span>
<span class="line" id="L789"> <span class="tok-number">0xD479</span>...<span class="tok-number">0xD493</span> =&gt; .LVT,</span>
<span class="line" id="L790"> <span class="tok-number">0xD495</span>...<span class="tok-number">0xD4AF</span> =&gt; .LVT,</span>
<span class="line" id="L791"> <span class="tok-number">0xD4B1</span>...<span class="tok-number">0xD4CB</span> =&gt; .LVT,</span>
<span class="line" id="L792"> <span class="tok-number">0xD4CD</span>...<span class="tok-number">0xD4E7</span> =&gt; .LVT,</span>
<span class="line" id="L793"> <span class="tok-number">0xD4E9</span>...<span class="tok-number">0xD503</span> =&gt; .LVT,</span>
<span class="line" id="L794"> <span class="tok-number">0xD505</span>...<span class="tok-number">0xD51F</span> =&gt; .LVT,</span>
<span class="line" id="L795"> <span class="tok-number">0xD521</span>...<span class="tok-number">0xD53B</span> =&gt; .LVT,</span>
<span class="line" id="L796"> <span class="tok-number">0xD53D</span>...<span class="tok-number">0xD557</span> =&gt; .LVT,</span>
<span class="line" id="L797"> <span class="tok-number">0xD559</span>...<span class="tok-number">0xD573</span> =&gt; .LVT,</span>
<span class="line" id="L798"> <span class="tok-number">0xD575</span>...<span class="tok-number">0xD58F</span> =&gt; .LVT,</span>
<span class="line" id="L799"> <span class="tok-number">0xD591</span>...<span class="tok-number">0xD5AB</span> =&gt; .LVT,</span>
<span class="line" id="L800"> <span class="tok-number">0xD5AD</span>...<span class="tok-number">0xD5C7</span> =&gt; .LVT,</span>
<span class="line" id="L801"> <span class="tok-number">0xD5C9</span>...<span class="tok-number">0xD5E3</span> =&gt; .LVT,</span>
<span class="line" id="L802"> <span class="tok-number">0xD5E5</span>...<span class="tok-number">0xD5FF</span> =&gt; .LVT,</span>
<span class="line" id="L803"> <span class="tok-number">0xD601</span>...<span class="tok-number">0xD61B</span> =&gt; .LVT,</span>
<span class="line" id="L804"> <span class="tok-number">0xD61D</span>...<span class="tok-number">0xD637</span> =&gt; .LVT,</span>
<span class="line" id="L805"> <span class="tok-number">0xD639</span>...<span class="tok-number">0xD653</span> =&gt; .LVT,</span>
<span class="line" id="L806"> <span class="tok-number">0xD655</span>...<span class="tok-number">0xD66F</span> =&gt; .LVT,</span>
<span class="line" id="L807"> <span class="tok-number">0xD671</span>...<span class="tok-number">0xD68B</span> =&gt; .LVT,</span>
<span class="line" id="L808"> <span class="tok-number">0xD68D</span>...<span class="tok-number">0xD6A7</span> =&gt; .LVT,</span>
<span class="line" id="L809"> <span class="tok-number">0xD6A9</span>...<span class="tok-number">0xD6C3</span> =&gt; .LVT,</span>
<span class="line" id="L810"> <span class="tok-number">0xD6C5</span>...<span class="tok-number">0xD6DF</span> =&gt; .LVT,</span>
<span class="line" id="L811"> <span class="tok-number">0xD6E1</span>...<span class="tok-number">0xD6FB</span> =&gt; .LVT,</span>
<span class="line" id="L812"> <span class="tok-number">0xD6FD</span>...<span class="tok-number">0xD717</span> =&gt; .LVT,</span>
<span class="line" id="L813"> <span class="tok-number">0xD719</span>...<span class="tok-number">0xD733</span> =&gt; .LVT,</span>
<span class="line" id="L814"> <span class="tok-number">0xD735</span>...<span class="tok-number">0xD74F</span> =&gt; .LVT,</span>
<span class="line" id="L815"> <span class="tok-number">0xD751</span>...<span class="tok-number">0xD76B</span> =&gt; .LVT,</span>
<span class="line" id="L816"> <span class="tok-number">0xD76D</span>...<span class="tok-number">0xD787</span> =&gt; .LVT,</span>
<span class="line" id="L817"> <span class="tok-number">0xD789</span>...<span class="tok-number">0xD7A3</span> =&gt; .LVT,</span>
<span class="line" id="L818"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">null</span>,</span>
<span class="line" id="L819"> };</span>
<span class="line" id="L820">}</span>
<span class="line" id="L821"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `letter` provides functions for hte Letter (L) Unicode category.</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> case_fold_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/case_folding.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> props = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_core_properties.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> cats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_general_category.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> lower_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/lower_map.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> title_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/title_map.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> upper_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/upper_map.zig&quot;</span>);</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-comment">/// `isCased` detects letters that can be either upper, lower, or title cased.</span></span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isCased</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L14"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L15"> <span class="tok-kw">if</span> ((<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">or</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L16"> <span class="tok-kw">return</span> props.isCased(cp);</span>
<span class="line" id="L17">}</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-comment">/// `isLetter` covers all letters in Unicode, not just ASCII.</span></span>
<span class="line" id="L20"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isLetter</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L21"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L22"> <span class="tok-kw">if</span> ((<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">or</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L23"></span>
<span class="line" id="L24"> <span class="tok-kw">return</span> cats.isLowercaseLetter(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L25"> cats.isUppercaseLetter(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L26"> cats.isTitlecaseLetter(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L27"> cats.isModifierLetter(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L28"> cats.isOtherLetter(cp);</span>
<span class="line" id="L29">}</span>
<span class="line" id="L30"></span>
<span class="line" id="L31"><span class="tok-comment">/// `isAscii` detects ASCII only letters.</span></span>
<span class="line" id="L32"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiLetter</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L33"> <span class="tok-kw">return</span> (<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">or</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>);</span>
<span class="line" id="L34">}</span>
<span class="line" id="L35"></span>
<span class="line" id="L36"><span class="tok-comment">/// `isLower` detects code points that are lowercase.</span></span>
<span class="line" id="L37"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L38"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L39"> <span class="tok-kw">if</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L40"> <span class="tok-kw">return</span> props.isLowercase(cp);</span>
<span class="line" id="L41">}</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"><span class="tok-comment">/// `isAsciiLower` detects ASCII only lowercase letters.</span></span>
<span class="line" id="L44"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L45"> <span class="tok-kw">return</span> <span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>;</span>
<span class="line" id="L46">}</span>
<span class="line" id="L47"></span>
<span class="line" id="L48"><span class="tok-comment">/// `isTitle` detects code points in titlecase.</span></span>
<span class="line" id="L49"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isTitle</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L50"> <span class="tok-kw">return</span> cats.isTitlecaseLetter(cp);</span>
<span class="line" id="L51">}</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"><span class="tok-comment">/// `isUpper` detects code points in uppercase.</span></span>
<span class="line" id="L54"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L55"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L56"> <span class="tok-kw">if</span> ((<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L57"> <span class="tok-kw">return</span> props.isUppercase(cp);</span>
<span class="line" id="L58">}</span>
<span class="line" id="L59"></span>
<span class="line" id="L60"><span class="tok-comment">/// `isAsciiUpper` detects ASCII only uppercase letters.</span></span>
<span class="line" id="L61"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L62"> <span class="tok-kw">return</span> <span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>;</span>
<span class="line" id="L63">}</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"><span class="tok-comment">/// `toLower` returns the lowercase mapping for the given code point, or itself if none found.</span></span>
<span class="line" id="L66"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L67"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L68"> <span class="tok-kw">if</span> (<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">return</span> cp ^ <span class="tok-number">32</span>;</span>
<span class="line" id="L69"> <span class="tok-kw">return</span> lower_map.toLower(cp);</span>
<span class="line" id="L70">}</span>
<span class="line" id="L71"></span>
<span class="line" id="L72"><span class="tok-comment">/// `toAsciiLower` converts an ASCII letter to lowercase.</span></span>
<span class="line" id="L73"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toAsciiLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L74"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) cp ^ <span class="tok-number">32</span> <span class="tok-kw">else</span> cp;</span>
<span class="line" id="L75">}</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"><span class="tok-comment">/// `toTitle` returns the titlecase mapping for the given code point, or itself if none found.</span></span>
<span class="line" id="L78"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toTitle</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L79"> <span class="tok-kw">return</span> title_map.toTitle(cp);</span>
<span class="line" id="L80">}</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"><span class="tok-comment">/// `toUpper` returns the uppercase mapping for the given code point, or itself if none found.</span></span>
<span class="line" id="L83"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L84"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L85"> <span class="tok-kw">if</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>) <span class="tok-kw">return</span> cp ^ <span class="tok-number">32</span>;</span>
<span class="line" id="L86"> <span class="tok-kw">return</span> upper_map.toUpper(cp);</span>
<span class="line" id="L87">}</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"><span class="tok-comment">/// `toAsciiUpper` converts an ASCII letter to uppercase.</span></span>
<span class="line" id="L90"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toAsciiUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L91"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>) cp ^ <span class="tok-number">32</span> <span class="tok-kw">else</span> cp;</span>
<span class="line" id="L92">}</span>
<span class="line" id="L93"></span>
<span class="line" id="L94"><span class="tok-comment">/// `toCaseFold` will convert a code point into its case folded equivalent. Note that this can result</span></span>
<span class="line" id="L95"><span class="tok-comment">/// in a mapping to more than one code point, known as the full case fold. The returned array has 3</span></span>
<span class="line" id="L96"><span class="tok-comment">/// elements and the code points span until the first element equal to 0 or the end, whichever is first.</span></span>
<span class="line" id="L97"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toCaseFold</span>(cp: <span class="tok-type">u21</span>) [<span class="tok-number">3</span>]<span class="tok-type">u21</span> {</span>
<span class="line" id="L98"> <span class="tok-kw">return</span> case_fold_map.toCaseFold(cp);</span>
<span class="line" id="L99">}</span>
<span class="line" id="L100"></span>
<span class="line" id="L101"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter&quot;</span> {</span>
<span class="line" id="L102"> <span class="tok-kw">const</span> z = <span class="tok-str">'z'</span>;</span>
<span class="line" id="L103"> <span class="tok-kw">try</span> std.testing.expect(isLetter(z));</span>
<span class="line" id="L104"> <span class="tok-kw">try</span> std.testing.expect(!isUpper(z));</span>
<span class="line" id="L105"> <span class="tok-kw">const</span> uz = toUpper(z);</span>
<span class="line" id="L106"> <span class="tok-kw">try</span> std.testing.expect(isUpper(uz));</span>
<span class="line" id="L107"> <span class="tok-kw">try</span> std.testing.expectEqual(uz, <span class="tok-str">'Z'</span>);</span>
<span class="line" id="L108">}</span>
<span class="line" id="L109"></span>
<span class="line" id="L110"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter isCased&quot;</span> {</span>
<span class="line" id="L111"> <span class="tok-kw">try</span> std.testing.expect(isCased(<span class="tok-str">'a'</span>));</span>
<span class="line" id="L112"> <span class="tok-kw">try</span> std.testing.expect(isCased(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L113"> <span class="tok-kw">try</span> std.testing.expect(!isCased(<span class="tok-str">'1'</span>));</span>
<span class="line" id="L114">}</span>
<span class="line" id="L115"></span>
<span class="line" id="L116"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter isLower&quot;</span> {</span>
<span class="line" id="L117"> <span class="tok-kw">try</span> std.testing.expect(isLower(<span class="tok-str">'a'</span>));</span>
<span class="line" id="L118"> <span class="tok-kw">try</span> std.testing.expect(isAsciiLower(<span class="tok-str">'a'</span>));</span>
<span class="line" id="L119"> <span class="tok-kw">try</span> std.testing.expect(isLower(<span class="tok-str">'é'</span>));</span>
<span class="line" id="L120"> <span class="tok-kw">try</span> std.testing.expect(isLower(<span class="tok-str">'i'</span>));</span>
<span class="line" id="L121"> <span class="tok-kw">try</span> std.testing.expect(!isLower(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L122"> <span class="tok-kw">try</span> std.testing.expect(!isLower(<span class="tok-str">'É'</span>));</span>
<span class="line" id="L123"> <span class="tok-kw">try</span> std.testing.expect(!isLower(<span class="tok-str">'İ'</span>));</span>
<span class="line" id="L124">}</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter toCaseFold&quot;</span> {</span>
<span class="line" id="L127"> <span class="tok-kw">var</span> result = toCaseFold(<span class="tok-str">'A'</span>);</span>
<span class="line" id="L128"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'a'</span>, <span class="tok-number">0</span>, <span class="tok-number">0</span> }, &amp;result);</span>
<span class="line" id="L129"></span>
<span class="line" id="L130"> result = toCaseFold(<span class="tok-str">'a'</span>);</span>
<span class="line" id="L131"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'a'</span>, <span class="tok-number">0</span>, <span class="tok-number">0</span> }, &amp;result);</span>
<span class="line" id="L132"></span>
<span class="line" id="L133"> result = toCaseFold(<span class="tok-str">'1'</span>);</span>
<span class="line" id="L134"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'1'</span>, <span class="tok-number">0</span>, <span class="tok-number">0</span> }, &amp;result);</span>
<span class="line" id="L135"></span>
<span class="line" id="L136"> result = toCaseFold(<span class="tok-str">'\u{00DF}'</span>);</span>
<span class="line" id="L137"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-number">0x0073</span>, <span class="tok-number">0x0073</span>, <span class="tok-number">0</span> }, &amp;result);</span>
<span class="line" id="L138"></span>
<span class="line" id="L139"> result = toCaseFold(<span class="tok-str">'\u{0390}'</span>);</span>
<span class="line" id="L140"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-number">0x03B9</span>, <span class="tok-number">0x0308</span>, <span class="tok-number">0x0301</span> }, &amp;result);</span>
<span class="line" id="L141">}</span>
<span class="line" id="L142"></span>
<span class="line" id="L143"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter toLower&quot;</span> {</span>
<span class="line" id="L144"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'a'</span>), <span class="tok-str">'a'</span>);</span>
<span class="line" id="L145"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'A'</span>), <span class="tok-str">'a'</span>);</span>
<span class="line" id="L146"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'İ'</span>), <span class="tok-str">'i'</span>);</span>
<span class="line" id="L147"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'É'</span>), <span class="tok-str">'é'</span>);</span>
<span class="line" id="L148"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-number">0x80</span>), <span class="tok-number">0x80</span>);</span>
<span class="line" id="L149"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-number">0x80</span>), <span class="tok-number">0x80</span>);</span>
<span class="line" id="L150"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'Å'</span>), <span class="tok-str">'å'</span>);</span>
<span class="line" id="L151"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'å'</span>), <span class="tok-str">'å'</span>);</span>
<span class="line" id="L152"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'\u{212A}'</span>), <span class="tok-str">'k'</span>);</span>
<span class="line" id="L153"> <span class="tok-kw">try</span> std.testing.expectEqual(toLower(<span class="tok-str">'1'</span>), <span class="tok-str">'1'</span>);</span>
<span class="line" id="L154">}</span>
<span class="line" id="L155"></span>
<span class="line" id="L156"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter isUpper&quot;</span> {</span>
<span class="line" id="L157"> <span class="tok-kw">try</span> std.testing.expect(!isUpper(<span class="tok-str">'a'</span>));</span>
<span class="line" id="L158"> <span class="tok-kw">try</span> std.testing.expect(!isAsciiUpper(<span class="tok-str">'a'</span>));</span>
<span class="line" id="L159"> <span class="tok-kw">try</span> std.testing.expect(!isUpper(<span class="tok-str">'é'</span>));</span>
<span class="line" id="L160"> <span class="tok-kw">try</span> std.testing.expect(!isUpper(<span class="tok-str">'i'</span>));</span>
<span class="line" id="L161"> <span class="tok-kw">try</span> std.testing.expect(isUpper(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L162"> <span class="tok-kw">try</span> std.testing.expect(isUpper(<span class="tok-str">'É'</span>));</span>
<span class="line" id="L163"> <span class="tok-kw">try</span> std.testing.expect(isUpper(<span class="tok-str">'İ'</span>));</span>
<span class="line" id="L164">}</span>
<span class="line" id="L165"></span>
<span class="line" id="L166"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter toUpper&quot;</span> {</span>
<span class="line" id="L167"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'a'</span>), <span class="tok-str">'A'</span>);</span>
<span class="line" id="L168"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'A'</span>), <span class="tok-str">'A'</span>);</span>
<span class="line" id="L169"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'i'</span>), <span class="tok-str">'I'</span>);</span>
<span class="line" id="L170"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'é'</span>), <span class="tok-str">'É'</span>);</span>
<span class="line" id="L171"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-number">0x80</span>), <span class="tok-number">0x80</span>);</span>
<span class="line" id="L172"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'Å'</span>), <span class="tok-str">'Å'</span>);</span>
<span class="line" id="L173"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'å'</span>), <span class="tok-str">'Å'</span>);</span>
<span class="line" id="L174"> <span class="tok-kw">try</span> std.testing.expectEqual(toUpper(<span class="tok-str">'1'</span>), <span class="tok-str">'1'</span>);</span>
<span class="line" id="L175">}</span>
<span class="line" id="L176"></span>
<span class="line" id="L177"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter isTitle&quot;</span> {</span>
<span class="line" id="L178"> <span class="tok-kw">try</span> std.testing.expect(!isTitle(<span class="tok-str">'a'</span>));</span>
<span class="line" id="L179"> <span class="tok-kw">try</span> std.testing.expect(!isTitle(<span class="tok-str">'é'</span>));</span>
<span class="line" id="L180"> <span class="tok-kw">try</span> std.testing.expect(!isTitle(<span class="tok-str">'i'</span>));</span>
<span class="line" id="L181"> <span class="tok-kw">try</span> std.testing.expect(isTitle(<span class="tok-str">'\u{1FBC}'</span>));</span>
<span class="line" id="L182"> <span class="tok-kw">try</span> std.testing.expect(isTitle(<span class="tok-str">'\u{1FCC}'</span>));</span>
<span class="line" id="L183"> <span class="tok-kw">try</span> std.testing.expect(isTitle(<span class="tok-str">'Lj'</span>));</span>
<span class="line" id="L184">}</span>
<span class="line" id="L185"></span>
<span class="line" id="L186"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter toTitle&quot;</span> {</span>
<span class="line" id="L187"> <span class="tok-kw">try</span> std.testing.expectEqual(toTitle(<span class="tok-str">'a'</span>), <span class="tok-str">'A'</span>);</span>
<span class="line" id="L188"> <span class="tok-kw">try</span> std.testing.expectEqual(toTitle(<span class="tok-str">'A'</span>), <span class="tok-str">'A'</span>);</span>
<span class="line" id="L189"> <span class="tok-kw">try</span> std.testing.expectEqual(toTitle(<span class="tok-str">'i'</span>), <span class="tok-str">'I'</span>);</span>
<span class="line" id="L190"> <span class="tok-kw">try</span> std.testing.expectEqual(toTitle(<span class="tok-str">'é'</span>), <span class="tok-str">'É'</span>);</span>
<span class="line" id="L191"> <span class="tok-kw">try</span> std.testing.expectEqual(toTitle(<span class="tok-str">'1'</span>), <span class="tok-str">'1'</span>);</span>
<span class="line" id="L192">}</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"><span class="tok-kw">test</span> <span class="tok-str">&quot;letter isLetter&quot;</span> {</span>
<span class="line" id="L195"> <span class="tok-kw">var</span> cp: <span class="tok-type">u21</span> = <span class="tok-str">'a'</span>;</span>
<span class="line" id="L196"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'z'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L197"> <span class="tok-kw">try</span> std.testing.expect(isLetter(cp));</span>
<span class="line" id="L198"> }</span>
<span class="line" id="L199"></span>
<span class="line" id="L200"> cp = <span class="tok-str">'A'</span>;</span>
<span class="line" id="L201"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'Z'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L202"> <span class="tok-kw">try</span> std.testing.expect(isLetter(cp));</span>
<span class="line" id="L203"> }</span>
<span class="line" id="L204"></span>
<span class="line" id="L205"> <span class="tok-kw">try</span> std.testing.expect(isLetter(<span class="tok-str">'É'</span>));</span>
<span class="line" id="L206"> <span class="tok-kw">try</span> std.testing.expect(isLetter(<span class="tok-str">'\u{2CEB3}'</span>));</span>
<span class="line" id="L207"> <span class="tok-kw">try</span> std.testing.expect(!isLetter(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L208">}</span>
<span class="line" id="L209"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `mark` contains a function to detect Unicode marks, category (M).</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> cats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_general_category.zig&quot;</span>);</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-comment">/// `isMark` detects any type of Unicode mark (M) code point.</span></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isMark</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L9"> <span class="tok-kw">return</span> cats.isSpacingMark(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L10"> cats.isNonspacingMark(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L11"> cats.isEnclosingMark(cp);</span>
<span class="line" id="L12">}</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">test</span> <span class="tok-str">&quot;mark isMark&quot;</span> {</span>
<span class="line" id="L15"> <span class="tok-kw">try</span> std.testing.expect(isMark(<span class="tok-str">'\u{20E4}'</span>));</span>
<span class="line" id="L16"> <span class="tok-kw">try</span> std.testing.expect(isMark(<span class="tok-number">0x0301</span>));</span>
<span class="line" id="L17"> <span class="tok-kw">try</span> std.testing.expect(!isMark(<span class="tok-str">'='</span>));</span>
<span class="line" id="L18">}</span>
<span class="line" id="L19"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `number` contains functions related to Unicode numbers; category (N).</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> cats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_general_category.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> numeric = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_numeric_type.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> props = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/prop_list.zig&quot;</span>);</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-comment">/// `isDecimal` detects all Unicode decimal numbers.</span></span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isDecimal</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L11"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L12"> <span class="tok-kw">if</span> (<span class="tok-str">'0'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L13"> <span class="tok-kw">return</span> numeric.isDecimal(cp);</span>
<span class="line" id="L14">}</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-comment">/// `isDigit` detects variantes of decimal digits.</span></span>
<span class="line" id="L17"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L18"> <span class="tok-kw">return</span> numeric.isDigit(cp);</span>
<span class="line" id="L19">}</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-comment">/// `isAsciiDigit` detects ASCII only digits.</span></span>
<span class="line" id="L22"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L23"> <span class="tok-kw">return</span> <span class="tok-str">'0'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>;</span>
<span class="line" id="L24">}</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"><span class="tok-comment">/// `isHex` detects the 16 ASCII characters 0-9 A-F, and a-f.</span></span>
<span class="line" id="L27"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isHexDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L28"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L29"> <span class="tok-kw">if</span> ((<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'f'</span>) <span class="tok-kw">or</span> (<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'F'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'0'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L30"> <span class="tok-kw">return</span> props.isHexDigit(cp);</span>
<span class="line" id="L31">}</span>
<span class="line" id="L32"></span>
<span class="line" id="L33"><span class="tok-comment">/// `isAsciiHexDigit` detects ASCII only hexadecimal digits.</span></span>
<span class="line" id="L34"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiHexDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L35"> <span class="tok-kw">return</span> (<span class="tok-str">'a'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'f'</span>) <span class="tok-kw">or</span> (<span class="tok-str">'A'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'F'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'0'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>);</span>
<span class="line" id="L36">}</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"><span class="tok-comment">/// `isNumber` covers all Unicode numbers, not just ASII.</span></span>
<span class="line" id="L39"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isNumber</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L40"> <span class="tok-comment">// ASCII optimization.</span>
</span>
<span class="line" id="L41"> <span class="tok-kw">if</span> (<span class="tok-str">'0'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L42"> <span class="tok-kw">return</span> isDecimal(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L43"> isDigit(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L44"> numeric.isNumeric(cp);</span>
<span class="line" id="L45">}</span>
<span class="line" id="L46"></span>
<span class="line" id="L47"><span class="tok-comment">/// isAsciiNumber detects ASCII only numbers.</span></span>
<span class="line" id="L48"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiNumber</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L49"> <span class="tok-kw">return</span> <span class="tok-str">'0'</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>;</span>
<span class="line" id="L50">}</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"><span class="tok-kw">test</span> <span class="tok-str">&quot;number isDecimal&quot;</span> {</span>
<span class="line" id="L53"> <span class="tok-kw">var</span> cp: <span class="tok-type">u21</span> = <span class="tok-str">'0'</span>;</span>
<span class="line" id="L54"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'9'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L55"> <span class="tok-kw">try</span> std.testing.expect(isDecimal(cp));</span>
<span class="line" id="L56"> <span class="tok-kw">try</span> std.testing.expect(isAsciiDigit(cp));</span>
<span class="line" id="L57"> <span class="tok-kw">try</span> std.testing.expect(isAsciiNumber(cp));</span>
<span class="line" id="L58"> }</span>
<span class="line" id="L59"></span>
<span class="line" id="L60"> <span class="tok-kw">try</span> std.testing.expect(!isDecimal(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L61"> <span class="tok-kw">try</span> std.testing.expect(!isDecimal(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L62">}</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"><span class="tok-kw">test</span> <span class="tok-str">&quot;number isHexDigit&quot;</span> {</span>
<span class="line" id="L65"> <span class="tok-kw">var</span> cp: <span class="tok-type">u21</span> = <span class="tok-str">'0'</span>;</span>
<span class="line" id="L66"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'9'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L67"> <span class="tok-kw">try</span> std.testing.expect(isHexDigit(cp));</span>
<span class="line" id="L68"> }</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">try</span> std.testing.expect(!isHexDigit(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L71"> <span class="tok-kw">try</span> std.testing.expect(!isHexDigit(<span class="tok-str">'Z'</span>));</span>
<span class="line" id="L72">}</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"><span class="tok-kw">test</span> <span class="tok-str">&quot;number isNumber&quot;</span> {</span>
<span class="line" id="L75"> <span class="tok-kw">var</span> cp: <span class="tok-type">u21</span> = <span class="tok-str">'0'</span>;</span>
<span class="line" id="L76"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'9'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L77"> <span class="tok-kw">try</span> std.testing.expect(isNumber(cp));</span>
<span class="line" id="L78"> }</span>
<span class="line" id="L79"></span>
<span class="line" id="L80"> <span class="tok-kw">try</span> std.testing.expect(!isNumber(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L81"> <span class="tok-kw">try</span> std.testing.expect(!isNumber(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L82">}</span>
<span class="line" id="L83"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `punct` containes functions related to Unicode punctuation code points; category (P).</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> cats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_general_category.zig&quot;</span>);</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-comment">/// `isPunct` detects punctuation characters. Note some punctuation maybe considered symbols by Unicode.</span></span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isPunct</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L9"> <span class="tok-kw">return</span> cats.isInitialPunctuation(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L10"> cats.isFinalPunctuation(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L11"> cats.isOpenPunctuation(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L12"> cats.isClosePunctuation(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L13"> cats.isConnectorPunctuation(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L14"> cats.isDashPunctuation(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L15"> cats.isOtherPunctuation(cp);</span>
<span class="line" id="L16">}</span>
<span class="line" id="L17"></span>
<span class="line" id="L18"><span class="tok-kw">test</span> <span class="tok-str">&quot;punct isPunct&quot;</span> {</span>
<span class="line" id="L19"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'!'</span>));</span>
<span class="line" id="L20"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'?'</span>));</span>
<span class="line" id="L21"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">','</span>));</span>
<span class="line" id="L22"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'.'</span>));</span>
<span class="line" id="L23"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">':'</span>));</span>
<span class="line" id="L24"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">';'</span>));</span>
<span class="line" id="L25"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'\''</span>));</span>
<span class="line" id="L26"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'&quot;'</span>));</span>
<span class="line" id="L27"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'¿'</span>));</span>
<span class="line" id="L28"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'¡'</span>));</span>
<span class="line" id="L29"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'-'</span>));</span>
<span class="line" id="L30"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'('</span>));</span>
<span class="line" id="L31"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">')'</span>));</span>
<span class="line" id="L32"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'{'</span>));</span>
<span class="line" id="L33"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'}'</span>));</span>
<span class="line" id="L34"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">''</span>));</span>
<span class="line" id="L35"> <span class="tok-comment">// Punct? in Unicode.</span>
</span>
<span class="line" id="L36"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'@'</span>));</span>
<span class="line" id="L37"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'#'</span>));</span>
<span class="line" id="L38"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'%'</span>));</span>
<span class="line" id="L39"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'&amp;'</span>));</span>
<span class="line" id="L40"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'*'</span>));</span>
<span class="line" id="L41"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'_'</span>));</span>
<span class="line" id="L42"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'/'</span>));</span>
<span class="line" id="L43"> <span class="tok-kw">try</span> std.testing.expect(isPunct(<span class="tok-str">'\\'</span>));</span>
<span class="line" id="L44"> <span class="tok-kw">try</span> std.testing.expect(!isPunct(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L45">}</span>
<span class="line" id="L46"></span>
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<pre><code><span class="line" id="L1"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> ccc_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_combining_class.zig&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> CodePointIterator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../segmenter/CodePoint.zig&quot;</span>).CodePointIterator;</span>
<span class="line" id="L5"><span class="tok-kw">const</span> Normalizer = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../normalizer/Normalizer.zig&quot;</span>);</span>
<span class="line" id="L6"><span class="tok-kw">const</span> props = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/prop_list.zig&quot;</span>);</span>
<span class="line" id="L7"></span>
<span class="line" id="L8"><span class="tok-kw">const</span> Element = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L9"> l1: <span class="tok-type">u16</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L10"> l2: <span class="tok-type">u16</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L11"> l3: <span class="tok-type">u8</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L12">};</span>
<span class="line" id="L13"></span>
<span class="line" id="L14"><span class="tok-kw">const</span> Implicit = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L15"> start: <span class="tok-type">u21</span>,</span>
<span class="line" id="L16"> end: <span class="tok-type">u21</span>,</span>
<span class="line" id="L17"> base: <span class="tok-type">u16</span>,</span>
<span class="line" id="L18">};</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L21"></span>
<span class="line" id="L22">ducet: std.AutoHashMap([<span class="tok-number">3</span>]<span class="tok-type">u21</span>, [<span class="tok-number">18</span>]?Element),</span>
<span class="line" id="L23">implicits: [<span class="tok-number">4</span>]Implicit,</span>
<span class="line" id="L24">normalizer: Normalizer,</span>
<span class="line" id="L25"></span>
<span class="line" id="L26"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: std.mem.Allocator) !Self {</span>
<span class="line" id="L27"> <span class="tok-kw">var</span> self = Self{</span>
<span class="line" id="L28"> .ducet = std.AutoHashMap([<span class="tok-number">3</span>]<span class="tok-type">u21</span>, [<span class="tok-number">18</span>]?Element).init(allocator),</span>
<span class="line" id="L29"> .implicits = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L30"> .normalizer = <span class="tok-kw">try</span> Normalizer.init(allocator),</span>
<span class="line" id="L31"> };</span>
<span class="line" id="L32"> <span class="tok-kw">errdefer</span> self.deinit();</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"> <span class="tok-comment">// allkeys-strip.txt file.</span>
</span>
<span class="line" id="L35"> <span class="tok-kw">const</span> ak_file = <span class="tok-builtin">@embedFile</span>(<span class="tok-str">&quot;../data/allkeys-diffs.txt.deflate&quot;</span>);</span>
<span class="line" id="L36"> <span class="tok-kw">var</span> ak_fb = std.io.fixedBufferStream(ak_file);</span>
<span class="line" id="L37"> <span class="tok-kw">var</span> ak_comp = <span class="tok-kw">try</span> std.compress.deflate.decompressor(allocator, ak_fb.reader(), <span class="tok-null">null</span>);</span>
<span class="line" id="L38"> <span class="tok-kw">defer</span> ak_comp.deinit();</span>
<span class="line" id="L39"> <span class="tok-kw">var</span> ak_br = std.io.bufferedReader(ak_comp.reader());</span>
<span class="line" id="L40"> <span class="tok-kw">const</span> ak_reader = ak_br.reader();</span>
<span class="line" id="L41"></span>
<span class="line" id="L42"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4096</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L43"> <span class="tok-kw">var</span> line_num: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L44"></span>
<span class="line" id="L45"> <span class="tok-comment">// Diff state</span>
</span>
<span class="line" id="L46"> <span class="tok-kw">var</span> prev_cp: <span class="tok-type">u21</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L47"> <span class="tok-kw">var</span> cp_diff: <span class="tok-type">isize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L48"> <span class="tok-kw">var</span> prev_l1: <span class="tok-type">u16</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L49"> <span class="tok-kw">var</span> l1_diff: <span class="tok-type">isize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L50"></span>
<span class="line" id="L51"> <span class="tok-kw">while</span> (<span class="tok-kw">try</span> ak_reader.readUntilDelimiterOrEof(&amp;buf, <span class="tok-str">'\n'</span>)) |line| : (line_num += <span class="tok-number">1</span>) {</span>
<span class="line" id="L52"> <span class="tok-kw">var</span> fields = std.mem.split(<span class="tok-type">u8</span>, line, <span class="tok-str">&quot;;&quot;</span>);</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-comment">// Will the number of implicits change in a future version of Unicode?</span>
</span>
<span class="line" id="L55"> <span class="tok-kw">if</span> (line_num &lt; <span class="tok-number">4</span>) {</span>
<span class="line" id="L56"> self.implicits[line_num] = Implicit{</span>
<span class="line" id="L57"> .start = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>),</span>
<span class="line" id="L58"> .end = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>),</span>
<span class="line" id="L59"> .base = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u16</span>, fields.next().?, <span class="tok-number">16</span>),</span>
<span class="line" id="L60"> };</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L63"> }</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L66"> <span class="tok-kw">var</span> cps = [_]<span class="tok-type">u21</span>{<span class="tok-number">0</span>} ** <span class="tok-number">3</span>;</span>
<span class="line" id="L67"> <span class="tok-kw">var</span> cp_diff_strs = std.mem.split(<span class="tok-type">u8</span>, fields.next().?, <span class="tok-str">&quot; &quot;</span>);</span>
<span class="line" id="L68"></span>
<span class="line" id="L69"> <span class="tok-kw">while</span> (cp_diff_strs.next()) |cp_diff_str| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L70"> cp_diff = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">isize</span>, cp_diff_str, <span class="tok-number">16</span>);</span>
<span class="line" id="L71"> prev_cp = <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@as</span>(<span class="tok-type">isize</span>, prev_cp) + cp_diff);</span>
<span class="line" id="L72"> cps[i] = prev_cp;</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"> i = <span class="tok-number">0</span>;</span>
<span class="line" id="L76"> <span class="tok-kw">var</span> elements = [_]?Element{<span class="tok-null">null</span>} ** <span class="tok-number">18</span>;</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"> <span class="tok-kw">while</span> (fields.next()) |element_diff_str| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L79"> <span class="tok-comment">// i.e. 3D3;-42</span>
</span>
<span class="line" id="L80"> <span class="tok-kw">if</span> (std.mem.indexOf(<span class="tok-type">u8</span>, element_diff_str, <span class="tok-str">&quot;.&quot;</span>) == <span class="tok-null">null</span>) {</span>
<span class="line" id="L81"> l1_diff = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">isize</span>, element_diff_str, <span class="tok-number">16</span>);</span>
<span class="line" id="L82"> prev_l1 = <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@as</span>(<span class="tok-type">isize</span>, prev_l1) + l1_diff);</span>
<span class="line" id="L83"></span>
<span class="line" id="L84"> elements[i] = Element{</span>
<span class="line" id="L85"> .l1 = prev_l1,</span>
<span class="line" id="L86"> .l2 = <span class="tok-number">0x20</span>,</span>
<span class="line" id="L87"> .l3 = <span class="tok-number">0x2</span>,</span>
<span class="line" id="L88"> };</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L91"> }</span>
<span class="line" id="L92"></span>
<span class="line" id="L93"> <span class="tok-kw">var</span> weight_strs = std.mem.split(<span class="tok-type">u8</span>, element_diff_str, <span class="tok-str">&quot;.&quot;</span>);</span>
<span class="line" id="L94"> l1_diff = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">isize</span>, weight_strs.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L95"> prev_l1 = <span class="tok-builtin">@intCast</span>(<span class="tok-builtin">@as</span>(<span class="tok-type">isize</span>, prev_l1) + l1_diff);</span>
<span class="line" id="L96"> elements[i] = Element{ .l1 = prev_l1 };</span>
<span class="line" id="L97"></span>
<span class="line" id="L98"> <span class="tok-kw">var</span> j: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L99"> <span class="tok-kw">while</span> (weight_strs.next()) |weight_str| : (j += <span class="tok-number">1</span>) {</span>
<span class="line" id="L100"> <span class="tok-kw">if</span> (weight_str.len == <span class="tok-number">1</span> <span class="tok-kw">and</span> weight_str[<span class="tok-number">0</span>] == <span class="tok-str">')'</span>) {</span>
<span class="line" id="L101"> elements[i].?.l2 = <span class="tok-number">0</span>;</span>
<span class="line" id="L102"> elements[i].?.l3 = <span class="tok-number">0</span>;</span>
<span class="line" id="L103"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L104"> }</span>
<span class="line" id="L105"></span>
<span class="line" id="L106"> <span class="tok-kw">if</span> (weight_str[<span class="tok-number">0</span>] == <span class="tok-str">'@'</span>) {</span>
<span class="line" id="L107"> elements[i].?.l2 = <span class="tok-number">0x20</span>;</span>
<span class="line" id="L108"> elements[i].?.l3 = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u8</span>, weight_str[<span class="tok-number">1</span>..], <span class="tok-number">16</span>);</span>
<span class="line" id="L109"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L110"> }</span>
<span class="line" id="L111"></span>
<span class="line" id="L112"> <span class="tok-kw">switch</span> (j) {</span>
<span class="line" id="L113"> <span class="tok-number">0</span> =&gt; elements[i].?.l2 = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u16</span>, weight_str, <span class="tok-number">16</span>),</span>
<span class="line" id="L114"> <span class="tok-number">1</span> =&gt; elements[i].?.l3 = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u8</span>, weight_str, <span class="tok-number">16</span>),</span>
<span class="line" id="L115"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"> }</span>
<span class="line" id="L118"> }</span>
<span class="line" id="L119"></span>
<span class="line" id="L120"> <span class="tok-kw">try</span> self.ducet.put(cps, elements);</span>
<span class="line" id="L121"> }</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L124">}</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L127"> self.ducet.deinit();</span>
<span class="line" id="L128"> self.normalizer.deinit();</span>
<span class="line" id="L129">}</span>
<span class="line" id="L130"></span>
<span class="line" id="L131"><span class="tok-kw">test</span> <span class="tok-str">&quot;init / deinit&quot;</span> {</span>
<span class="line" id="L132"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L133"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0xfb00</span>), c.implicits[<span class="tok-number">0</span>].base);</span>
<span class="line" id="L136"> <span class="tok-comment">//try std.testing.expectEqual(@as(usize, 34193), c.ducet.count()); // full</span>
</span>
<span class="line" id="L137"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">32130</span>), c.ducet.count()); <span class="tok-comment">// NFD only</span>
</span>
<span class="line" id="L138">}</span>
<span class="line" id="L139"></span>
<span class="line" id="L140"><span class="tok-kw">fn</span> <span class="tok-fn">implicitWeight</span>(self: Self, cp: <span class="tok-type">u21</span>) [<span class="tok-number">18</span>]?Element {</span>
<span class="line" id="L141"> <span class="tok-kw">var</span> base: <span class="tok-type">u16</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L142"> <span class="tok-kw">var</span> aaaa: <span class="tok-type">u16</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L143"> <span class="tok-kw">var</span> bbbb: <span class="tok-type">u16</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L144"></span>
<span class="line" id="L145"> <span class="tok-kw">if</span> (props.isUnifiedIdeograph(cp) <span class="tok-kw">and</span> ((<span class="tok-number">0x4E00</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x9FFF</span>) <span class="tok-kw">or</span> (<span class="tok-number">0xF900</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0xFAFF</span>))) {</span>
<span class="line" id="L146"> base = <span class="tok-number">0xFB40</span>;</span>
<span class="line" id="L147"> aaaa = base + <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp &gt;&gt; <span class="tok-number">15</span>)));</span>
<span class="line" id="L148"> bbbb = <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp &amp; <span class="tok-number">0x7FFF</span>))) | <span class="tok-number">0x8000</span>;</span>
<span class="line" id="L149"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (props.isUnifiedIdeograph(cp) <span class="tok-kw">and</span> !((<span class="tok-number">0x4E00</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x9FFF</span>) <span class="tok-kw">or</span> (<span class="tok-number">0xF900</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0xFAFF</span>))) {</span>
<span class="line" id="L150"> base = <span class="tok-number">0xFB80</span>;</span>
<span class="line" id="L151"> aaaa = base + <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp &gt;&gt; <span class="tok-number">15</span>)));</span>
<span class="line" id="L152"> bbbb = <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp &amp; <span class="tok-number">0x7FFF</span>))) | <span class="tok-number">0x8000</span>;</span>
<span class="line" id="L153"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L154"> <span class="tok-kw">for</span> (self.implicits) |implicit| {</span>
<span class="line" id="L155"> <span class="tok-kw">if</span> (implicit.start &lt;= cp <span class="tok-kw">and</span> cp &lt;= implicit.end) {</span>
<span class="line" id="L156"> aaaa = implicit.base;</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"> <span class="tok-kw">if</span> (<span class="tok-number">0x18D00</span> &lt;= cp <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x18D8F</span>) {</span>
<span class="line" id="L159"> bbbb = <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@truncate</span>((cp - <span class="tok-number">17000</span>))) | <span class="tok-number">0x8000</span>;</span>
<span class="line" id="L160"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L161"> bbbb = <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp - implicit.start))) | <span class="tok-number">0x8000</span>;</span>
<span class="line" id="L162"> }</span>
<span class="line" id="L163"></span>
<span class="line" id="L164"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L165"> }</span>
<span class="line" id="L166"> }</span>
<span class="line" id="L167"></span>
<span class="line" id="L168"> <span class="tok-kw">if</span> (aaaa == <span class="tok-number">0</span>) {</span>
<span class="line" id="L169"> base = <span class="tok-number">0xFBC0</span>;</span>
<span class="line" id="L170"> aaaa = base + <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp &gt;&gt; <span class="tok-number">15</span>)));</span>
<span class="line" id="L171"> bbbb = <span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-builtin">@intCast</span>((cp &amp; <span class="tok-number">0x7FFF</span>))) | <span class="tok-number">0x8000</span>;</span>
<span class="line" id="L172"> }</span>
<span class="line" id="L173"> }</span>
<span class="line" id="L174"></span>
<span class="line" id="L175"> <span class="tok-kw">var</span> elements = [_]?Element{<span class="tok-null">null</span>} ** <span class="tok-number">18</span>;</span>
<span class="line" id="L176"> elements[<span class="tok-number">0</span>] = Element{ .l1 = aaaa, .l2 = <span class="tok-number">0x0020</span>, .l3 = <span class="tok-number">0x0002</span> };</span>
<span class="line" id="L177"> elements[<span class="tok-number">1</span>] = Element{ .l1 = bbbb, .l2 = <span class="tok-number">0x0000</span>, .l3 = <span class="tok-number">0x0000</span> };</span>
<span class="line" id="L178"></span>
<span class="line" id="L179"> <span class="tok-kw">return</span> elements;</span>
<span class="line" id="L180">}</span>
<span class="line" id="L181"></span>
<span class="line" id="L182"><span class="tok-kw">fn</span> <span class="tok-fn">getElements</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-kw">const</span> Element {</span>
<span class="line" id="L183"> std.debug.assert(str.len &gt; <span class="tok-number">0</span>);</span>
<span class="line" id="L184"></span>
<span class="line" id="L185"> <span class="tok-kw">var</span> normalized = <span class="tok-kw">try</span> self.normalizer.nfd(allocator, str);</span>
<span class="line" id="L186"> <span class="tok-kw">defer</span> normalized.deinit();</span>
<span class="line" id="L187"></span>
<span class="line" id="L188"> <span class="tok-kw">var</span> cp_list = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u21</span>).initCapacity(allocator, normalized.slice.len);</span>
<span class="line" id="L189"> <span class="tok-kw">defer</span> cp_list.deinit();</span>
<span class="line" id="L190"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = normalized.slice };</span>
<span class="line" id="L191"> <span class="tok-kw">while</span> (cp_iter.next()) |cp| cp_list.appendAssumeCapacity(cp.code);</span>
<span class="line" id="L192"></span>
<span class="line" id="L193"> <span class="tok-kw">var</span> all_elements = std.ArrayList(Element).init(allocator);</span>
<span class="line" id="L194"> <span class="tok-kw">defer</span> all_elements.deinit();</span>
<span class="line" id="L195"></span>
<span class="line" id="L196"> <span class="tok-kw">var</span> cp_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">while</span> (cp_index &lt; cp_list.items.len) {</span>
<span class="line" id="L199"> <span class="tok-kw">var</span> S: [<span class="tok-number">3</span>]<span class="tok-type">u21</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L200"> <span class="tok-kw">var</span> s_len: <span class="tok-type">usize</span> = <span class="tok-number">3</span>;</span>
<span class="line" id="L201"> <span class="tok-kw">var</span> elements: ?[<span class="tok-number">18</span>]?Element = <span class="tok-null">null</span>;</span>
<span class="line" id="L202"></span>
<span class="line" id="L203"> <span class="tok-kw">if</span> (cp_list.items.len &gt; cp_index + <span class="tok-number">2</span>) {</span>
<span class="line" id="L204"> S[<span class="tok-number">0</span>] = cp_list.items[cp_index];</span>
<span class="line" id="L205"> S[<span class="tok-number">1</span>] = cp_list.items[cp_index + <span class="tok-number">1</span>];</span>
<span class="line" id="L206"> S[<span class="tok-number">2</span>] = cp_list.items[cp_index + <span class="tok-number">2</span>];</span>
<span class="line" id="L207"> elements = self.ducet.get(S);</span>
<span class="line" id="L208"> }</span>
<span class="line" id="L209"></span>
<span class="line" id="L210"> <span class="tok-kw">if</span> (elements == <span class="tok-null">null</span> <span class="tok-kw">and</span> cp_list.items.len &gt; cp_index + <span class="tok-number">1</span>) {</span>
<span class="line" id="L211"> S[<span class="tok-number">0</span>] = cp_list.items[cp_index];</span>
<span class="line" id="L212"> S[<span class="tok-number">1</span>] = cp_list.items[cp_index + <span class="tok-number">1</span>];</span>
<span class="line" id="L213"> S[<span class="tok-number">2</span>] = <span class="tok-number">0</span>;</span>
<span class="line" id="L214"> s_len = <span class="tok-number">2</span>;</span>
<span class="line" id="L215"> elements = self.ducet.get(S);</span>
<span class="line" id="L216"> }</span>
<span class="line" id="L217"></span>
<span class="line" id="L218"> <span class="tok-kw">if</span> (elements == <span class="tok-null">null</span>) {</span>
<span class="line" id="L219"> S[<span class="tok-number">0</span>] = cp_list.items[cp_index];</span>
<span class="line" id="L220"> S[<span class="tok-number">1</span>] = <span class="tok-number">0</span>;</span>
<span class="line" id="L221"> S[<span class="tok-number">2</span>] = <span class="tok-number">0</span>;</span>
<span class="line" id="L222"> s_len = <span class="tok-number">1</span>;</span>
<span class="line" id="L223"> elements = self.ducet.get(S);</span>
<span class="line" id="L224"> }</span>
<span class="line" id="L225"></span>
<span class="line" id="L226"> <span class="tok-kw">if</span> (elements != <span class="tok-null">null</span> <span class="tok-kw">and</span> s_len &lt; <span class="tok-number">3</span>) {</span>
<span class="line" id="L227"> <span class="tok-comment">// Handle non-starters</span>
</span>
<span class="line" id="L228"> <span class="tok-kw">var</span> prev_ccc: ?<span class="tok-type">u8</span> = <span class="tok-null">null</span>;</span>
<span class="line" id="L229"> <span class="tok-kw">const</span> tail_start = cp_index + s_len; <span class="tok-comment">// 1 past S</span>
</span>
<span class="line" id="L230"> <span class="tok-kw">var</span> tail_index = tail_start;</span>
<span class="line" id="L231"></span>
<span class="line" id="L232"> <span class="tok-comment">// Advance to last combining C.</span>
</span>
<span class="line" id="L233"> <span class="tok-kw">while</span> (tail_index &lt; cp_list.items.len) : (tail_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L234"> <span class="tok-kw">const</span> ccc = ccc_map.combiningClass(cp_list.items[tail_index]);</span>
<span class="line" id="L235"> <span class="tok-kw">if</span> (ccc == <span class="tok-number">0</span> <span class="tok-kw">or</span> (prev_ccc != <span class="tok-null">null</span> <span class="tok-kw">and</span> prev_ccc.? &gt;= ccc)) <span class="tok-kw">break</span>;</span>
<span class="line" id="L236"> prev_ccc = ccc;</span>
<span class="line" id="L237"> }</span>
<span class="line" id="L238"></span>
<span class="line" id="L239"> <span class="tok-kw">if</span> (tail_start != tail_index) { <span class="tok-comment">// We have combining characters</span>
</span>
<span class="line" id="L240"> S[s_len] = cp_list.items[tail_index - <span class="tok-number">1</span>]; <span class="tok-comment">// S + C</span>
</span>
<span class="line" id="L241"> s_len += <span class="tok-number">1</span>;</span>
<span class="line" id="L242"></span>
<span class="line" id="L243"> <span class="tok-kw">if</span> (self.ducet.get(S)) |sc_elements| {</span>
<span class="line" id="L244"> <span class="tok-comment">// S + C has an entry; Rotate C to be just after S.</span>
</span>
<span class="line" id="L245"> <span class="tok-kw">const</span> segment = cp_list.items[tail_start..tail_index];</span>
<span class="line" id="L246"> std.mem.rotate(<span class="tok-type">u21</span>, segment, segment.len - <span class="tok-number">1</span>);</span>
<span class="line" id="L247"></span>
<span class="line" id="L248"> <span class="tok-comment">// Add S + C elements to final collection.</span>
</span>
<span class="line" id="L249"> <span class="tok-kw">for</span> (sc_elements) |element_opt| {</span>
<span class="line" id="L250"> <span class="tok-kw">if</span> (element_opt) |element| {</span>
<span class="line" id="L251"> <span class="tok-kw">try</span> all_elements.append(element);</span>
<span class="line" id="L252"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L253"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L254"> }</span>
<span class="line" id="L255"> }</span>
<span class="line" id="L256"></span>
<span class="line" id="L257"> cp_index += s_len; <span class="tok-comment">// 1 past S + C</span>
</span>
<span class="line" id="L258"></span>
<span class="line" id="L259"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L260"> }</span>
<span class="line" id="L261"></span>
<span class="line" id="L262"> <span class="tok-kw">if</span> (s_len &lt; <span class="tok-number">3</span>) S[s_len] = <span class="tok-number">0</span>; <span class="tok-comment">// back up to just S</span>
</span>
<span class="line" id="L263"> s_len -= <span class="tok-number">1</span>;</span>
<span class="line" id="L264"> }</span>
<span class="line" id="L265"> }</span>
<span class="line" id="L266"></span>
<span class="line" id="L267"> <span class="tok-kw">if</span> (elements == <span class="tok-null">null</span>) {</span>
<span class="line" id="L268"> <span class="tok-comment">// Not in DUCET; derive the elements.</span>
</span>
<span class="line" id="L269"> elements = self.implicitWeight(cp_list.items[cp_index]);</span>
<span class="line" id="L270"> }</span>
<span class="line" id="L271"></span>
<span class="line" id="L272"> <span class="tok-comment">// Add elements to final collection.</span>
</span>
<span class="line" id="L273"> <span class="tok-kw">for</span> (elements.?) |element_opt| {</span>
<span class="line" id="L274"> <span class="tok-kw">if</span> (element_opt) |element| {</span>
<span class="line" id="L275"> <span class="tok-kw">try</span> all_elements.append(element);</span>
<span class="line" id="L276"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L277"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L278"> }</span>
<span class="line" id="L279"> }</span>
<span class="line" id="L280"></span>
<span class="line" id="L281"> cp_index += s_len; <span class="tok-comment">// 1 past S</span>
</span>
<span class="line" id="L282"> }</span>
<span class="line" id="L283"></span>
<span class="line" id="L284"> <span class="tok-kw">return</span> all_elements.toOwnedSlice();</span>
<span class="line" id="L285">}</span>
<span class="line" id="L286"></span>
<span class="line" id="L287"><span class="tok-kw">test</span> <span class="tok-str">&quot;getElements&quot;</span> {</span>
<span class="line" id="L288"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L289"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L290"></span>
<span class="line" id="L291"> <span class="tok-kw">const</span> elements_1 = <span class="tok-kw">try</span> c.getElements(std.testing.allocator, <span class="tok-str">&quot;ca\u{301}b&quot;</span>);</span>
<span class="line" id="L292"> <span class="tok-kw">defer</span> std.testing.allocator.free(elements_1);</span>
<span class="line" id="L293"></span>
<span class="line" id="L294"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">4</span>), elements_1.len);</span>
<span class="line" id="L295"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x20e7</span>), elements_1[<span class="tok-number">0</span>].l1);</span>
<span class="line" id="L296"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x20b3</span>), elements_1[<span class="tok-number">1</span>].l1);</span>
<span class="line" id="L297"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x0024</span>), elements_1[<span class="tok-number">2</span>].l2);</span>
<span class="line" id="L298"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x20cd</span>), elements_1[<span class="tok-number">3</span>].l1);</span>
<span class="line" id="L299"></span>
<span class="line" id="L300"> <span class="tok-kw">const</span> elements_2 = <span class="tok-kw">try</span> c.getElements(std.testing.allocator, <span class="tok-str">&quot;\u{0CC6}\u{0CC2}\u{0CD5}&quot;</span>);</span>
<span class="line" id="L301"> <span class="tok-kw">defer</span> std.testing.allocator.free(elements_2);</span>
<span class="line" id="L302"></span>
<span class="line" id="L303"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), elements_2.len);</span>
<span class="line" id="L304"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x2D59</span>), elements_2[<span class="tok-number">0</span>].l1);</span>
<span class="line" id="L305"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x0020</span>), elements_2[<span class="tok-number">0</span>].l2);</span>
<span class="line" id="L306"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u16</span>, <span class="tok-number">0x0002</span>), elements_2[<span class="tok-number">0</span>].l3);</span>
<span class="line" id="L307">}</span>
<span class="line" id="L308"></span>
<span class="line" id="L309"><span class="tok-comment">/// A sort key is a slice of `u16`s that can be compared efficiently.</span></span>
<span class="line" id="L310"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">sortKey</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-kw">const</span> <span class="tok-type">u16</span> {</span>
<span class="line" id="L311"> <span class="tok-kw">const</span> elements = <span class="tok-kw">try</span> self.getElements(allocator, str);</span>
<span class="line" id="L312"> <span class="tok-kw">defer</span> allocator.free(elements);</span>
<span class="line" id="L313"></span>
<span class="line" id="L314"> <span class="tok-kw">var</span> sort_key = std.ArrayList(<span class="tok-type">u16</span>).init(allocator);</span>
<span class="line" id="L315"> <span class="tok-kw">defer</span> sort_key.deinit();</span>
<span class="line" id="L316"></span>
<span class="line" id="L317"> <span class="tok-kw">var</span> level: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L318"> <span class="tok-kw">while</span> (level &lt; <span class="tok-number">3</span>) : (level += <span class="tok-number">1</span>) {</span>
<span class="line" id="L319"> <span class="tok-kw">if</span> (level != <span class="tok-number">0</span>) <span class="tok-kw">try</span> sort_key.append(<span class="tok-number">0</span>); <span class="tok-comment">// level separator</span>
</span>
<span class="line" id="L320"></span>
<span class="line" id="L321"> <span class="tok-kw">for</span> (elements) |element| {</span>
<span class="line" id="L322"> <span class="tok-kw">switch</span> (level) {</span>
<span class="line" id="L323"> <span class="tok-number">0</span> =&gt; <span class="tok-kw">if</span> (element.l1 != <span class="tok-number">0</span>) <span class="tok-kw">try</span> sort_key.append(element.l1),</span>
<span class="line" id="L324"> <span class="tok-number">1</span> =&gt; <span class="tok-kw">if</span> (element.l2 != <span class="tok-number">0</span>) <span class="tok-kw">try</span> sort_key.append(element.l2),</span>
<span class="line" id="L325"> <span class="tok-number">2</span> =&gt; <span class="tok-kw">if</span> (element.l3 != <span class="tok-number">0</span>) <span class="tok-kw">try</span> sort_key.append(element.l3),</span>
<span class="line" id="L326"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L327"> }</span>
<span class="line" id="L328"> }</span>
<span class="line" id="L329"> }</span>
<span class="line" id="L330"></span>
<span class="line" id="L331"> <span class="tok-kw">return</span> sort_key.toOwnedSlice();</span>
<span class="line" id="L332">}</span>
<span class="line" id="L333"></span>
<span class="line" id="L334"><span class="tok-comment">/// Orders strings `a` and `b` based only on the base characters; case and combining marks are ignored.</span></span>
<span class="line" id="L335"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">primaryOrder</span>(a: []<span class="tok-kw">const</span> <span class="tok-type">u16</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u16</span>) std.math.Order {</span>
<span class="line" id="L336"> <span class="tok-kw">return</span> <span class="tok-kw">for</span> (a, <span class="tok-number">0</span>..) |weight, i| {</span>
<span class="line" id="L337"> <span class="tok-kw">if</span> (weight == <span class="tok-number">0</span>) <span class="tok-kw">break</span> .eq; <span class="tok-comment">// End of level</span>
</span>
<span class="line" id="L338"> <span class="tok-kw">const</span> order = std.math.order(weight, b[i]);</span>
<span class="line" id="L339"> <span class="tok-kw">if</span> (order != .eq) <span class="tok-kw">break</span> order;</span>
<span class="line" id="L340"> } <span class="tok-kw">else</span> .eq;</span>
<span class="line" id="L341">}</span>
<span class="line" id="L342"></span>
<span class="line" id="L343"><span class="tok-comment">/// Orders strings `a` and `b` based on base characters and combining marks; case is ignored.</span></span>
<span class="line" id="L344"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">secondaryOrder</span>(a: []<span class="tok-kw">const</span> <span class="tok-type">u16</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u16</span>) std.math.Order {</span>
<span class="line" id="L345"> <span class="tok-kw">var</span> last_level = <span class="tok-null">false</span>;</span>
<span class="line" id="L346"></span>
<span class="line" id="L347"> <span class="tok-kw">return</span> <span class="tok-kw">for</span> (a, <span class="tok-number">0</span>..) |weight, i| {</span>
<span class="line" id="L348"> <span class="tok-kw">if</span> (weight == <span class="tok-number">0</span>) {</span>
<span class="line" id="L349"> <span class="tok-kw">if</span> (last_level) <span class="tok-kw">break</span> .eq <span class="tok-kw">else</span> last_level = <span class="tok-null">true</span>;</span>
<span class="line" id="L350"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L351"> }</span>
<span class="line" id="L352"></span>
<span class="line" id="L353"> <span class="tok-kw">const</span> order = std.math.order(weight, b[i]);</span>
<span class="line" id="L354"> <span class="tok-kw">if</span> (order != .eq) <span class="tok-kw">break</span> order;</span>
<span class="line" id="L355"> } <span class="tok-kw">else</span> .eq;</span>
<span class="line" id="L356">}</span>
<span class="line" id="L357"></span>
<span class="line" id="L358"><span class="tok-comment">/// Orders strings `a` and `b` based on base characters, combining marks, and letter case.</span></span>
<span class="line" id="L359"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">tertiaryOrder</span>(a: []<span class="tok-kw">const</span> <span class="tok-type">u16</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u16</span>) std.math.Order {</span>
<span class="line" id="L360"> <span class="tok-kw">return</span> <span class="tok-kw">for</span> (a, <span class="tok-number">0</span>..) |weight, i| {</span>
<span class="line" id="L361"> <span class="tok-kw">const</span> order = std.math.order(weight, b[i]);</span>
<span class="line" id="L362"> <span class="tok-kw">if</span> (order != .eq) <span class="tok-kw">break</span> order;</span>
<span class="line" id="L363"> } <span class="tok-kw">else</span> .eq;</span>
<span class="line" id="L364">}</span>
<span class="line" id="L365"></span>
<span class="line" id="L366"><span class="tok-kw">test</span> <span class="tok-str">&quot;key order&quot;</span> {</span>
<span class="line" id="L367"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L368"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L369"></span>
<span class="line" id="L370"> <span class="tok-kw">const</span> key_a = <span class="tok-kw">try</span> c.sortKey(std.testing.allocator, <span class="tok-str">&quot;cab&quot;</span>);</span>
<span class="line" id="L371"> <span class="tok-kw">defer</span> std.testing.allocator.free(key_a);</span>
<span class="line" id="L372"> <span class="tok-kw">const</span> key_b = <span class="tok-kw">try</span> c.sortKey(std.testing.allocator, <span class="tok-str">&quot;Cab&quot;</span>);</span>
<span class="line" id="L373"> <span class="tok-kw">defer</span> std.testing.allocator.free(key_b);</span>
<span class="line" id="L374"></span>
<span class="line" id="L375"> <span class="tok-kw">try</span> std.testing.expectEqual(std.math.Order.eq, primaryOrder(key_a, key_b));</span>
<span class="line" id="L376"> <span class="tok-kw">try</span> std.testing.expectEqual(std.math.Order.eq, secondaryOrder(key_a, key_b));</span>
<span class="line" id="L377"> <span class="tok-kw">try</span> std.testing.expectEqual(std.math.Order.lt, tertiaryOrder(key_a, key_b));</span>
<span class="line" id="L378">}</span>
<span class="line" id="L379"></span>
<span class="line" id="L380"><span class="tok-kw">test</span> <span class="tok-str">&quot;key order with combining&quot;</span> {</span>
<span class="line" id="L381"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L382"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L383"></span>
<span class="line" id="L384"> <span class="tok-kw">const</span> key_a = <span class="tok-kw">try</span> c.sortKey(std.testing.allocator, <span class="tok-str">&quot;ca\u{301}b&quot;</span>);</span>
<span class="line" id="L385"> <span class="tok-kw">defer</span> std.testing.allocator.free(key_a);</span>
<span class="line" id="L386"> <span class="tok-kw">const</span> key_b = <span class="tok-kw">try</span> c.sortKey(std.testing.allocator, <span class="tok-str">&quot;Cab&quot;</span>);</span>
<span class="line" id="L387"> <span class="tok-kw">defer</span> std.testing.allocator.free(key_b);</span>
<span class="line" id="L388"></span>
<span class="line" id="L389"> <span class="tok-kw">try</span> std.testing.expectEqual(std.math.Order.eq, primaryOrder(key_a, key_b));</span>
<span class="line" id="L390"> <span class="tok-kw">try</span> std.testing.expectEqual(std.math.Order.gt, secondaryOrder(key_a, key_b));</span>
<span class="line" id="L391"> <span class="tok-kw">try</span> std.testing.expectEqual(std.math.Order.gt, tertiaryOrder(key_a, key_b));</span>
<span class="line" id="L392">}</span>
<span class="line" id="L393"></span>
<span class="line" id="L394"><span class="tok-comment">/// An ascending sort for strings that works with `std.mem.sort`. Because the API requires this function to be</span></span>
<span class="line" id="L395"><span class="tok-comment">/// infallible, it just returns `false` on errors.</span></span>
<span class="line" id="L396"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ascending</span>(self: Self, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L397"> <span class="tok-kw">const</span> key_a = self.sortKey(self.ducet.allocator, a) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L398"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_a);</span>
<span class="line" id="L399"> <span class="tok-kw">const</span> key_b = self.sortKey(self.ducet.allocator, b) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L400"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_b);</span>
<span class="line" id="L401"></span>
<span class="line" id="L402"> <span class="tok-kw">return</span> tertiaryOrder(key_a, key_b) == .lt;</span>
<span class="line" id="L403">}</span>
<span class="line" id="L404"></span>
<span class="line" id="L405"><span class="tok-comment">/// A descending sort for strings that works with `std.mem.sort`. Because the API requires this function to be</span></span>
<span class="line" id="L406"><span class="tok-comment">/// infallible, it just returns `false` on errors.</span></span>
<span class="line" id="L407"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">descending</span>(self: Self, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L408"> <span class="tok-kw">const</span> key_a = self.sortKey(self.ducet.allocator, a) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L409"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_a);</span>
<span class="line" id="L410"> <span class="tok-kw">const</span> key_b = self.sortKey(self.ducet.allocator, b) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L411"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_b);</span>
<span class="line" id="L412"></span>
<span class="line" id="L413"> <span class="tok-kw">return</span> tertiaryOrder(key_a, key_b) == .gt;</span>
<span class="line" id="L414">}</span>
<span class="line" id="L415"></span>
<span class="line" id="L416"><span class="tok-kw">test</span> <span class="tok-str">&quot;sort functions&quot;</span> {</span>
<span class="line" id="L417"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L418"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L419"></span>
<span class="line" id="L420"> <span class="tok-kw">var</span> strings = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;def&quot;</span>, <span class="tok-str">&quot;xyz&quot;</span>, <span class="tok-str">&quot;abc&quot;</span> };</span>
<span class="line" id="L421"> <span class="tok-kw">var</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;abc&quot;</span>, <span class="tok-str">&quot;def&quot;</span>, <span class="tok-str">&quot;xyz&quot;</span> };</span>
<span class="line" id="L422"></span>
<span class="line" id="L423"> std.mem.sort([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;strings, c, ascending);</span>
<span class="line" id="L424"> <span class="tok-kw">try</span> std.testing.expectEqualSlices([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;want, &amp;strings);</span>
<span class="line" id="L425"></span>
<span class="line" id="L426"> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;xyz&quot;</span>, <span class="tok-str">&quot;def&quot;</span>, <span class="tok-str">&quot;abc&quot;</span> };</span>
<span class="line" id="L427"> std.mem.sort([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;strings, c, descending);</span>
<span class="line" id="L428"> <span class="tok-kw">try</span> std.testing.expectEqualSlices([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;want, &amp;strings);</span>
<span class="line" id="L429">}</span>
<span class="line" id="L430"></span>
<span class="line" id="L431"><span class="tok-comment">/// A caseless ascending sort for strings that works with `std.mem.sort`. Because the API requires this function to be</span></span>
<span class="line" id="L432"><span class="tok-comment">/// infallible, it just returns `false` on errors.</span></span>
<span class="line" id="L433"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ascendingCaseless</span>(self: Self, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L434"> <span class="tok-kw">const</span> key_a = self.sortKey(self.ducet.allocator, a) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L435"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_a);</span>
<span class="line" id="L436"> <span class="tok-kw">const</span> key_b = self.sortKey(self.ducet.allocator, b) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L437"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_b);</span>
<span class="line" id="L438"></span>
<span class="line" id="L439"> <span class="tok-kw">return</span> secondaryOrder(key_a, key_b) == .lt;</span>
<span class="line" id="L440">}</span>
<span class="line" id="L441"></span>
<span class="line" id="L442"><span class="tok-comment">/// A caseless descending sort for strings that works with `std.mem.sort`. Because the API requires this function to be</span></span>
<span class="line" id="L443"><span class="tok-comment">/// infallible, it just returns `false` on errors.</span></span>
<span class="line" id="L444"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">descendingCaseless</span>(self: Self, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L445"> <span class="tok-kw">const</span> key_a = self.sortKey(self.ducet.allocator, a) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L446"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_a);</span>
<span class="line" id="L447"> <span class="tok-kw">const</span> key_b = self.sortKey(self.ducet.allocator, b) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L448"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_b);</span>
<span class="line" id="L449"></span>
<span class="line" id="L450"> <span class="tok-kw">return</span> secondaryOrder(key_a, key_b) == .gt;</span>
<span class="line" id="L451">}</span>
<span class="line" id="L452"></span>
<span class="line" id="L453"><span class="tok-kw">test</span> <span class="tok-str">&quot;caseless sort functions&quot;</span> {</span>
<span class="line" id="L454"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L455"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L456"></span>
<span class="line" id="L457"> <span class="tok-kw">var</span> strings = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;def&quot;</span>, <span class="tok-str">&quot;Abc&quot;</span>, <span class="tok-str">&quot;abc&quot;</span> };</span>
<span class="line" id="L458"> <span class="tok-kw">var</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;Abc&quot;</span>, <span class="tok-str">&quot;abc&quot;</span>, <span class="tok-str">&quot;def&quot;</span> };</span>
<span class="line" id="L459"></span>
<span class="line" id="L460"> std.mem.sort([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;strings, c, ascendingCaseless);</span>
<span class="line" id="L461"> <span class="tok-kw">try</span> std.testing.expectEqualSlices([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;want, &amp;strings);</span>
<span class="line" id="L462"></span>
<span class="line" id="L463"> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;def&quot;</span>, <span class="tok-str">&quot;Abc&quot;</span>, <span class="tok-str">&quot;abc&quot;</span> };</span>
<span class="line" id="L464"> std.mem.sort([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;strings, c, descendingCaseless);</span>
<span class="line" id="L465"> <span class="tok-kw">try</span> std.testing.expectEqualSlices([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;want, &amp;strings);</span>
<span class="line" id="L466">}</span>
<span class="line" id="L467"></span>
<span class="line" id="L468"><span class="tok-kw">test</span> <span class="tok-str">&quot;caseless / markless sort functions&quot;</span> {</span>
<span class="line" id="L469"> <span class="tok-kw">var</span> c = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L470"> <span class="tok-kw">defer</span> c.deinit();</span>
<span class="line" id="L471"></span>
<span class="line" id="L472"> <span class="tok-kw">var</span> strings = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;ábc&quot;</span>, <span class="tok-str">&quot;Abc&quot;</span>, <span class="tok-str">&quot;abc&quot;</span> };</span>
<span class="line" id="L473"> <span class="tok-kw">const</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;ábc&quot;</span>, <span class="tok-str">&quot;Abc&quot;</span>, <span class="tok-str">&quot;abc&quot;</span> };</span>
<span class="line" id="L474"></span>
<span class="line" id="L475"> std.mem.sort([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;strings, c, ascendingBase);</span>
<span class="line" id="L476"> <span class="tok-kw">try</span> std.testing.expectEqualSlices([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;want, &amp;strings);</span>
<span class="line" id="L477"></span>
<span class="line" id="L478"> std.mem.sort([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;strings, c, descendingBase);</span>
<span class="line" id="L479"> <span class="tok-kw">try</span> std.testing.expectEqualSlices([]<span class="tok-kw">const</span> <span class="tok-type">u8</span>, &amp;want, &amp;strings);</span>
<span class="line" id="L480">}</span>
<span class="line" id="L481"></span>
<span class="line" id="L482"><span class="tok-comment">/// An ascending sort for strings that works with `std.mem.sort`. This ignores case and any combining marks like</span></span>
<span class="line" id="L483"><span class="tok-comment">/// accents. Because the API requires this function to be infallible, it just returns `false` on errors.</span></span>
<span class="line" id="L484"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ascendingBase</span>(self: Self, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L485"> <span class="tok-kw">const</span> key_a = self.sortKey(self.ducet.allocator, a) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L486"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_a);</span>
<span class="line" id="L487"> <span class="tok-kw">const</span> key_b = self.sortKey(self.ducet.allocator, b) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L488"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_b);</span>
<span class="line" id="L489"></span>
<span class="line" id="L490"> <span class="tok-kw">return</span> primaryOrder(key_a, key_b) == .lt;</span>
<span class="line" id="L491">}</span>
<span class="line" id="L492"></span>
<span class="line" id="L493"><span class="tok-comment">/// A descending sort for strings that works with `std.mem.sort`. This ignores case and any combining marks like</span></span>
<span class="line" id="L494"><span class="tok-comment">/// accents. Because the API requires this function to be infallible, it just returns `false` on errors.</span></span>
<span class="line" id="L495"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">descendingBase</span>(self: Self, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L496"> <span class="tok-kw">const</span> key_a = self.sortKey(self.ducet.allocator, a) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L497"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_a);</span>
<span class="line" id="L498"> <span class="tok-kw">const</span> key_b = self.sortKey(self.ducet.allocator, b) <span class="tok-kw">catch</span> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L499"> <span class="tok-kw">defer</span> self.ducet.allocator.free(key_b);</span>
<span class="line" id="L500"></span>
<span class="line" id="L501"> <span class="tok-kw">return</span> primaryOrder(key_a, key_b) == .gt;</span>
<span class="line" id="L502">}</span>
<span class="line" id="L503"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `display_width` provides functions that calculate the display width of a code point or string when displayed in a</span></span>
<span class="line" id="L2"><span class="tok-comment">//! fixed-width font.</span></span>
<span class="line" id="L3"></span>
<span class="line" id="L4"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L5"><span class="tok-kw">const</span> unicode = std.unicode;</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> cats = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph.zig&quot;</span>).general_category;</span>
<span class="line" id="L8"><span class="tok-kw">const</span> eaw = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph.zig&quot;</span>).east_asian_width;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> emoji = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph.zig&quot;</span>).emoji;</span>
<span class="line" id="L10"><span class="tok-kw">const</span> gbp = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph.zig&quot;</span>).grapheme_break;</span>
<span class="line" id="L11"><span class="tok-kw">const</span> GraphemeIterator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph.zig&quot;</span>).GraphemeIterator;</span>
<span class="line" id="L12"><span class="tok-kw">const</span> Word = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;ziglyph.zig&quot;</span>).Word;</span>
<span class="line" id="L13"><span class="tok-kw">const</span> WordIterator = Word.WordIterator;</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-kw">fn</span> <span class="tok-fn">isAsciiStr</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L16"> <span class="tok-kw">return</span> <span class="tok-kw">for</span> (str) |b| {</span>
<span class="line" id="L17"> <span class="tok-kw">if</span> (b &gt; <span class="tok-number">127</span>) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L18"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L19">}</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-comment">/// AmbiguousWidth determines the width of ambiguous characters according to the context. In an</span></span>
<span class="line" id="L22"><span class="tok-comment">/// East Asian context, the width of ambiguous code points should be 2 (full), and 1 (half)</span></span>
<span class="line" id="L23"><span class="tok-comment">/// in non-East Asian contexts. The most common use case is `half`.</span></span>
<span class="line" id="L24"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> AmbiguousWidth = <span class="tok-kw">enum</span>(<span class="tok-type">u2</span>) {</span>
<span class="line" id="L25"> half = <span class="tok-number">1</span>,</span>
<span class="line" id="L26"> full = <span class="tok-number">2</span>,</span>
<span class="line" id="L27">};</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"><span class="tok-comment">/// codePointWidth returns how many cells (or columns) wide `cp` should be when rendered in a</span></span>
<span class="line" id="L30"><span class="tok-comment">/// fixed-width font.</span></span>
<span class="line" id="L31"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">codePointWidth</span>(cp: <span class="tok-type">u21</span>, am_width: AmbiguousWidth) <span class="tok-type">i3</span> {</span>
<span class="line" id="L32"> <span class="tok-kw">if</span> (cp == <span class="tok-number">0x000</span> <span class="tok-kw">or</span> cp == <span class="tok-number">0x0005</span> <span class="tok-kw">or</span> cp == <span class="tok-number">0x0007</span> <span class="tok-kw">or</span> (cp &gt;= <span class="tok-number">0x000A</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x000F</span>)) {</span>
<span class="line" id="L33"> <span class="tok-comment">// Control.</span>
</span>
<span class="line" id="L34"> <span class="tok-kw">return</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L35"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (cp == <span class="tok-number">0x0008</span> <span class="tok-kw">or</span> cp == <span class="tok-number">0x007F</span>) {</span>
<span class="line" id="L36"> <span class="tok-comment">// backspace and DEL</span>
</span>
<span class="line" id="L37"> <span class="tok-kw">return</span> -<span class="tok-number">1</span>;</span>
<span class="line" id="L38"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (cp == <span class="tok-number">0x00AD</span>) {</span>
<span class="line" id="L39"> <span class="tok-comment">// soft-hyphen</span>
</span>
<span class="line" id="L40"> <span class="tok-kw">return</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L41"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (cp == <span class="tok-number">0x2E3A</span>) {</span>
<span class="line" id="L42"> <span class="tok-comment">// two-em dash</span>
</span>
<span class="line" id="L43"> <span class="tok-kw">return</span> <span class="tok-number">2</span>;</span>
<span class="line" id="L44"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (cp == <span class="tok-number">0x2E3B</span>) {</span>
<span class="line" id="L45"> <span class="tok-comment">// three-em dash</span>
</span>
<span class="line" id="L46"> <span class="tok-kw">return</span> <span class="tok-number">3</span>;</span>
<span class="line" id="L47"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (cats.isEnclosingMark(cp) <span class="tok-kw">or</span> cats.isNonspacingMark(cp)) {</span>
<span class="line" id="L48"> <span class="tok-comment">// Combining Marks.</span>
</span>
<span class="line" id="L49"> <span class="tok-kw">return</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L50"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (cats.isFormat(cp) <span class="tok-kw">and</span> (!(cp &gt;= <span class="tok-number">0x0600</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x0605</span>) <span class="tok-kw">and</span> cp != <span class="tok-number">0x061C</span> <span class="tok-kw">and</span></span>
<span class="line" id="L51"> cp != <span class="tok-number">0x06DD</span> <span class="tok-kw">and</span> cp != <span class="tok-number">0x08E2</span>))</span>
<span class="line" id="L52"> {</span>
<span class="line" id="L53"> <span class="tok-comment">// Format except Arabic.</span>
</span>
<span class="line" id="L54"> <span class="tok-kw">return</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L55"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> ((cp &gt;= <span class="tok-number">0x1160</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x11FF</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-number">0x2060</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x206F</span>) <span class="tok-kw">or</span></span>
<span class="line" id="L56"> (cp &gt;= <span class="tok-number">0xFFF0</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0xFFF8</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-number">0xE0000</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0xE0FFF</span>))</span>
<span class="line" id="L57"> {</span>
<span class="line" id="L58"> <span class="tok-comment">// Hangul syllable and ignorable.</span>
</span>
<span class="line" id="L59"> <span class="tok-kw">return</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L60"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> ((cp &gt;= <span class="tok-number">0x3400</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x4DBF</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-number">0x4E00</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x9FFF</span>) <span class="tok-kw">or</span></span>
<span class="line" id="L61"> (cp &gt;= <span class="tok-number">0xF900</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0xFAFF</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-number">0x20000</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x2FFFD</span>) <span class="tok-kw">or</span></span>
<span class="line" id="L62"> (cp &gt;= <span class="tok-number">0x30000</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-number">0x3FFFD</span>))</span>
<span class="line" id="L63"> {</span>
<span class="line" id="L64"> <span class="tok-kw">return</span> <span class="tok-number">2</span>;</span>
<span class="line" id="L65"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (eaw.isWide(cp) <span class="tok-kw">or</span> eaw.isFullwidth(cp)) {</span>
<span class="line" id="L66"> <span class="tok-kw">return</span> <span class="tok-number">2</span>;</span>
<span class="line" id="L67"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (gbp.isRegionalIndicator(cp)) {</span>
<span class="line" id="L68"> <span class="tok-kw">return</span> <span class="tok-number">2</span>;</span>
<span class="line" id="L69"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (eaw.isAmbiguous(cp)) {</span>
<span class="line" id="L70"> <span class="tok-kw">return</span> <span class="tok-builtin">@intFromEnum</span>(am_width);</span>
<span class="line" id="L71"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L72"> <span class="tok-kw">return</span> <span class="tok-number">1</span>;</span>
<span class="line" id="L73"> }</span>
<span class="line" id="L74">}</span>
<span class="line" id="L75"></span>
<span class="line" id="L76"><span class="tok-comment">/// strWidth returns how many cells (or columns) wide `str` should be when rendered in a</span></span>
<span class="line" id="L77"><span class="tok-comment">/// fixed-width font.</span></span>
<span class="line" id="L78"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">strWidth</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, am_width: AmbiguousWidth) !<span class="tok-type">usize</span> {</span>
<span class="line" id="L79"> <span class="tok-kw">var</span> total: <span class="tok-type">isize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"> <span class="tok-comment">// ASCII bytes are all width == 1.</span>
</span>
<span class="line" id="L82"> <span class="tok-kw">if</span> (isAsciiStr(str)) {</span>
<span class="line" id="L83"> <span class="tok-kw">for</span> (str) |b| {</span>
<span class="line" id="L84"> <span class="tok-comment">// Backspace and DEL</span>
</span>
<span class="line" id="L85"> <span class="tok-kw">if</span> (b == <span class="tok-number">8</span> <span class="tok-kw">or</span> b == <span class="tok-number">127</span>) {</span>
<span class="line" id="L86"> total -= <span class="tok-number">1</span>;</span>
<span class="line" id="L87"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L88"> }</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"> <span class="tok-comment">// Control</span>
</span>
<span class="line" id="L91"> <span class="tok-kw">if</span> (b &lt; <span class="tok-number">32</span>) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L92"></span>
<span class="line" id="L93"> <span class="tok-comment">// All other ASCII.</span>
</span>
<span class="line" id="L94"> total += <span class="tok-number">1</span>;</span>
<span class="line" id="L95"> }</span>
<span class="line" id="L96"></span>
<span class="line" id="L97"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (total &gt; <span class="tok-number">0</span>) <span class="tok-builtin">@intCast</span>(total) <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L98"> }</span>
<span class="line" id="L99"></span>
<span class="line" id="L100"> <span class="tok-kw">var</span> giter = GraphemeIterator.init(str);</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">while</span> (giter.next()) |gc| {</span>
<span class="line" id="L103"> <span class="tok-kw">var</span> cp_iter = (<span class="tok-kw">try</span> unicode.Utf8View.init(str[gc.offset .. gc.offset + gc.len])).iterator();</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> <span class="tok-kw">while</span> (cp_iter.nextCodepoint()) |cp| {</span>
<span class="line" id="L106"> <span class="tok-kw">var</span> w = codePointWidth(cp, am_width);</span>
<span class="line" id="L107"></span>
<span class="line" id="L108"> <span class="tok-kw">if</span> (w != <span class="tok-number">0</span>) {</span>
<span class="line" id="L109"> <span class="tok-comment">// Only adding width of first non-zero-width code point.</span>
</span>
<span class="line" id="L110"> <span class="tok-kw">if</span> (emoji.isExtendedPictographic(cp)) {</span>
<span class="line" id="L111"> <span class="tok-kw">if</span> (cp_iter.nextCodepoint()) |ncp| {</span>
<span class="line" id="L112"> <span class="tok-comment">// emoji text sequence.</span>
</span>
<span class="line" id="L113"> <span class="tok-kw">if</span> (ncp == <span class="tok-number">0xFE0E</span>) w = <span class="tok-number">1</span>;</span>
<span class="line" id="L114"> <span class="tok-kw">if</span> (ncp == <span class="tok-number">0xFE0F</span>) w = <span class="tok-number">2</span>;</span>
<span class="line" id="L115"> }</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"> total += w;</span>
<span class="line" id="L118"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L119"> }</span>
<span class="line" id="L120"> }</span>
<span class="line" id="L121"> }</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (total &gt; <span class="tok-number">0</span>) <span class="tok-builtin">@intCast</span>(total) <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L124">}</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"><span class="tok-comment">/// centers `str` in a new string of width `total_width` (in display cells) using `pad` as padding.</span></span>
<span class="line" id="L127"><span class="tok-comment">/// If the length of `str` and `total_width` have different parity, the right side of `str` will</span></span>
<span class="line" id="L128"><span class="tok-comment">/// receive one additional pad. This makes sure the returned string fills the requested width.</span></span>
<span class="line" id="L129"><span class="tok-comment">/// Caller must free returned bytes.</span></span>
<span class="line" id="L130"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">center</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, total_width: <span class="tok-type">usize</span>, pad: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L131"> <span class="tok-kw">const</span> str_width = <span class="tok-kw">try</span> strWidth(str, .half);</span>
<span class="line" id="L132"> <span class="tok-kw">if</span> (str_width &gt; total_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.StrTooLong;</span>
<span class="line" id="L133"> <span class="tok-kw">if</span> (str_width == total_width) <span class="tok-kw">return</span> <span class="tok-kw">try</span> allocator.dupe(<span class="tok-type">u8</span>, str);</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"> <span class="tok-kw">const</span> pad_width = <span class="tok-kw">try</span> strWidth(pad, .half);</span>
<span class="line" id="L136"> <span class="tok-kw">if</span> (pad_width &gt; total_width <span class="tok-kw">or</span> str_width + pad_width &gt; total_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.PadTooLong;</span>
<span class="line" id="L137"></span>
<span class="line" id="L138"> <span class="tok-kw">const</span> margin_width = <span class="tok-builtin">@divFloor</span>((total_width - str_width), <span class="tok-number">2</span>);</span>
<span class="line" id="L139"> <span class="tok-kw">if</span> (pad_width &gt; margin_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.PadTooLong;</span>
<span class="line" id="L140"> <span class="tok-kw">const</span> extra_pad: <span class="tok-type">usize</span> = <span class="tok-kw">if</span> (total_width % <span class="tok-number">2</span> != str_width % <span class="tok-number">2</span>) <span class="tok-number">1</span> <span class="tok-kw">else</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L141"> <span class="tok-kw">const</span> pads = <span class="tok-builtin">@divFloor</span>(margin_width, pad_width) * <span class="tok-number">2</span> + extra_pad;</span>
<span class="line" id="L142"></span>
<span class="line" id="L143"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> allocator.alloc(<span class="tok-type">u8</span>, pads * pad.len + str.len);</span>
<span class="line" id="L144"> <span class="tok-kw">var</span> bytes_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L145"> <span class="tok-kw">var</span> pads_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L146"></span>
<span class="line" id="L147"> <span class="tok-kw">while</span> (pads_index &lt; pads / <span class="tok-number">2</span>) : (pads_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L148"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..pad.len], pad);</span>
<span class="line" id="L149"> bytes_index += pad.len;</span>
<span class="line" id="L150"> }</span>
<span class="line" id="L151"></span>
<span class="line" id="L152"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..str.len], str);</span>
<span class="line" id="L153"> bytes_index += str.len;</span>
<span class="line" id="L154"></span>
<span class="line" id="L155"> pads_index = <span class="tok-number">0</span>;</span>
<span class="line" id="L156"> <span class="tok-kw">while</span> (pads_index &lt; pads / <span class="tok-number">2</span> + extra_pad) : (pads_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L157"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..pad.len], pad);</span>
<span class="line" id="L158"> bytes_index += pad.len;</span>
<span class="line" id="L159"> }</span>
<span class="line" id="L160"></span>
<span class="line" id="L161"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L162">}</span>
<span class="line" id="L163"></span>
<span class="line" id="L164"><span class="tok-comment">/// padLeft returns a new string of width `total_width` (in display cells) using `pad` as padding</span></span>
<span class="line" id="L165"><span class="tok-comment">/// on the left side. Caller must free returned bytes.</span></span>
<span class="line" id="L166"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">padLeft</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, total_width: <span class="tok-type">usize</span>, pad: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L167"> <span class="tok-kw">const</span> str_width = <span class="tok-kw">try</span> strWidth(str, .half);</span>
<span class="line" id="L168"> <span class="tok-kw">if</span> (str_width &gt; total_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.StrTooLong;</span>
<span class="line" id="L169"></span>
<span class="line" id="L170"> <span class="tok-kw">const</span> pad_width = <span class="tok-kw">try</span> strWidth(pad, .half);</span>
<span class="line" id="L171"> <span class="tok-kw">if</span> (pad_width &gt; total_width <span class="tok-kw">or</span> str_width + pad_width &gt; total_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.PadTooLong;</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"> <span class="tok-kw">const</span> margin_width = total_width - str_width;</span>
<span class="line" id="L174"> <span class="tok-kw">if</span> (pad_width &gt; margin_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.PadTooLong;</span>
<span class="line" id="L175"></span>
<span class="line" id="L176"> <span class="tok-kw">const</span> pads = <span class="tok-builtin">@divFloor</span>(margin_width, pad_width);</span>
<span class="line" id="L177"></span>
<span class="line" id="L178"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> allocator.alloc(<span class="tok-type">u8</span>, pads * pad.len + str.len);</span>
<span class="line" id="L179"> <span class="tok-kw">var</span> bytes_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L180"> <span class="tok-kw">var</span> pads_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L181"></span>
<span class="line" id="L182"> <span class="tok-kw">while</span> (pads_index &lt; pads) : (pads_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L183"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..pad.len], pad);</span>
<span class="line" id="L184"> bytes_index += pad.len;</span>
<span class="line" id="L185"> }</span>
<span class="line" id="L186"></span>
<span class="line" id="L187"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..str.len], str);</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L190">}</span>
<span class="line" id="L191"></span>
<span class="line" id="L192"><span class="tok-comment">/// padRight returns a new string of width `total_width` (in display cells) using `pad` as padding</span></span>
<span class="line" id="L193"><span class="tok-comment">/// on the right side. Caller must free returned bytes.</span></span>
<span class="line" id="L194"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">padRight</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, total_width: <span class="tok-type">usize</span>, pad: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L195"> <span class="tok-kw">const</span> str_width = <span class="tok-kw">try</span> strWidth(str, .half);</span>
<span class="line" id="L196"> <span class="tok-kw">if</span> (str_width &gt; total_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.StrTooLong;</span>
<span class="line" id="L197"></span>
<span class="line" id="L198"> <span class="tok-kw">const</span> pad_width = <span class="tok-kw">try</span> strWidth(pad, .half);</span>
<span class="line" id="L199"> <span class="tok-kw">if</span> (pad_width &gt; total_width <span class="tok-kw">or</span> str_width + pad_width &gt; total_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.PadTooLong;</span>
<span class="line" id="L200"></span>
<span class="line" id="L201"> <span class="tok-kw">const</span> margin_width = total_width - str_width;</span>
<span class="line" id="L202"> <span class="tok-kw">if</span> (pad_width &gt; margin_width) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.PadTooLong;</span>
<span class="line" id="L203"></span>
<span class="line" id="L204"> <span class="tok-kw">const</span> pads = <span class="tok-builtin">@divFloor</span>(margin_width, pad_width);</span>
<span class="line" id="L205"></span>
<span class="line" id="L206"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> allocator.alloc(<span class="tok-type">u8</span>, pads * pad.len + str.len);</span>
<span class="line" id="L207"> <span class="tok-kw">var</span> bytes_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L208"> <span class="tok-kw">var</span> pads_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L209"></span>
<span class="line" id="L210"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..str.len], str);</span>
<span class="line" id="L211"> bytes_index += str.len;</span>
<span class="line" id="L212"></span>
<span class="line" id="L213"> <span class="tok-kw">while</span> (pads_index &lt; pads) : (pads_index += <span class="tok-number">1</span>) {</span>
<span class="line" id="L214"> <span class="tok-builtin">@memcpy</span>(result[bytes_index..][<span class="tok-number">0</span>..pad.len], pad);</span>
<span class="line" id="L215"> bytes_index += pad.len;</span>
<span class="line" id="L216"> }</span>
<span class="line" id="L217"></span>
<span class="line" id="L218"> <span class="tok-kw">return</span> result;</span>
<span class="line" id="L219">}</span>
<span class="line" id="L220"></span>
<span class="line" id="L221"><span class="tok-comment">/// Wraps a string approximately at the given number of colums per line. Threshold defines how far the last column of</span></span>
<span class="line" id="L222"><span class="tok-comment">/// the last word can be from the edge. Caller must free returned bytes.</span></span>
<span class="line" id="L223"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">wrap</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, columns: <span class="tok-type">usize</span>, threshold: <span class="tok-type">usize</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L224"> <span class="tok-kw">var</span> iter = <span class="tok-kw">try</span> WordIterator.init(str);</span>
<span class="line" id="L225"> <span class="tok-kw">var</span> result = std.ArrayList(<span class="tok-type">u8</span>).init(allocator);</span>
<span class="line" id="L226"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L227"> <span class="tok-kw">var</span> line_width: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L228"></span>
<span class="line" id="L229"> <span class="tok-kw">while</span> (iter.next()) |word| {</span>
<span class="line" id="L230"> <span class="tok-kw">if</span> (isLineBreak(word.bytes)) {</span>
<span class="line" id="L231"> <span class="tok-kw">try</span> result.append(<span class="tok-str">' '</span>);</span>
<span class="line" id="L232"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L233"> }</span>
<span class="line" id="L234"> <span class="tok-kw">try</span> result.appendSlice(word.bytes);</span>
<span class="line" id="L235"> line_width += <span class="tok-kw">try</span> strWidth(word.bytes, .half);</span>
<span class="line" id="L236"></span>
<span class="line" id="L237"> <span class="tok-kw">if</span> (line_width &gt; columns <span class="tok-kw">or</span> columns - line_width &lt;= threshold) {</span>
<span class="line" id="L238"> <span class="tok-kw">try</span> result.append(<span class="tok-str">'\n'</span>);</span>
<span class="line" id="L239"> line_width = <span class="tok-number">0</span>;</span>
<span class="line" id="L240"> }</span>
<span class="line" id="L241"> }</span>
<span class="line" id="L242"></span>
<span class="line" id="L243"> <span class="tok-kw">return</span> result.toOwnedSlice();</span>
<span class="line" id="L244">}</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"><span class="tok-kw">fn</span> <span class="tok-fn">isLineBreak</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L247"> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, str, <span class="tok-str">&quot;\r\n&quot;</span>)) {</span>
<span class="line" id="L248"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L249"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, str, <span class="tok-str">&quot;\r&quot;</span>)) {</span>
<span class="line" id="L250"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L251"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (std.mem.eql(<span class="tok-type">u8</span>, str, <span class="tok-str">&quot;\n&quot;</span>)) {</span>
<span class="line" id="L252"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L253"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L254"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L255"> }</span>
<span class="line" id="L256">}</span>
<span class="line" id="L257"></span>
<span class="line" id="L258"><span class="tok-kw">test</span> <span class="tok-str">&quot;display_width Width&quot;</span> {</span>
<span class="line" id="L259"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, -<span class="tok-number">1</span>), codePointWidth(<span class="tok-number">0x0008</span>, .half)); <span class="tok-comment">// \b</span>
</span>
<span class="line" id="L260"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x0000</span>, .half)); <span class="tok-comment">// null</span>
</span>
<span class="line" id="L261"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x0005</span>, .half)); <span class="tok-comment">// Cf</span>
</span>
<span class="line" id="L262"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x0007</span>, .half)); <span class="tok-comment">// \a BEL</span>
</span>
<span class="line" id="L263"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x000A</span>, .half)); <span class="tok-comment">// \n LF</span>
</span>
<span class="line" id="L264"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x000B</span>, .half)); <span class="tok-comment">// \v VT</span>
</span>
<span class="line" id="L265"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x000C</span>, .half)); <span class="tok-comment">// \f FF</span>
</span>
<span class="line" id="L266"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x000D</span>, .half)); <span class="tok-comment">// \r CR</span>
</span>
<span class="line" id="L267"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x000E</span>, .half)); <span class="tok-comment">// SQ</span>
</span>
<span class="line" id="L268"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x000F</span>, .half)); <span class="tok-comment">// SI</span>
</span>
<span class="line" id="L269"></span>
<span class="line" id="L270"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">0</span>), codePointWidth(<span class="tok-number">0x070F</span>, .half)); <span class="tok-comment">// Cf</span>
</span>
<span class="line" id="L271"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">1</span>), codePointWidth(<span class="tok-number">0x0603</span>, .half)); <span class="tok-comment">// Cf Arabic</span>
</span>
<span class="line" id="L272"></span>
<span class="line" id="L273"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">1</span>), codePointWidth(<span class="tok-number">0x00AD</span>, .half)); <span class="tok-comment">// soft-hyphen</span>
</span>
<span class="line" id="L274"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">2</span>), codePointWidth(<span class="tok-number">0x2E3A</span>, .half)); <span class="tok-comment">// two-em dash</span>
</span>
<span class="line" id="L275"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">3</span>), codePointWidth(<span class="tok-number">0x2E3B</span>, .half)); <span class="tok-comment">// three-em dash</span>
</span>
<span class="line" id="L276"></span>
<span class="line" id="L277"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">1</span>), codePointWidth(<span class="tok-number">0x00BD</span>, .half)); <span class="tok-comment">// ambiguous halfwidth</span>
</span>
<span class="line" id="L278"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">2</span>), codePointWidth(<span class="tok-number">0x00BD</span>, .full)); <span class="tok-comment">// ambiguous fullwidth</span>
</span>
<span class="line" id="L279"></span>
<span class="line" id="L280"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">1</span>), codePointWidth(<span class="tok-str">'é'</span>, .half));</span>
<span class="line" id="L281"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">2</span>), codePointWidth(<span class="tok-str">'😊'</span>, .half));</span>
<span class="line" id="L282"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">i8</span>, <span class="tok-number">2</span>), codePointWidth(<span class="tok-str">'统'</span>, .half));</span>
<span class="line" id="L283"></span>
<span class="line" id="L284"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">5</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;Hello\r\n&quot;</span>, .half));</span>
<span class="line" id="L285"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{0065}\u{0301}&quot;</span>, .half));</span>
<span class="line" id="L286"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">2</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{1F476}\u{1F3FF}\u{0308}\u{200D}\u{1F476}\u{1F3FF}&quot;</span>, .half));</span>
<span class="line" id="L287"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">8</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;Hello 😊&quot;</span>, .half));</span>
<span class="line" id="L288"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">8</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;Héllo 😊&quot;</span>, .half));</span>
<span class="line" id="L289"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">8</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;Héllo :)&quot;</span>, .half));</span>
<span class="line" id="L290"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">8</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;Héllo 🇪🇸&quot;</span>, .half));</span>
<span class="line" id="L291"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">2</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{26A1}&quot;</span>, .half)); <span class="tok-comment">// Lone emoji</span>
</span>
<span class="line" id="L292"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{26A1}\u{FE0E}&quot;</span>, .half)); <span class="tok-comment">// Text sequence</span>
</span>
<span class="line" id="L293"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">2</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{26A1}\u{FE0F}&quot;</span>, .half)); <span class="tok-comment">// Presentation sequence</span>
</span>
<span class="line" id="L294"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{2764}&quot;</span>, .half)); <span class="tok-comment">// Default text presentation</span>
</span>
<span class="line" id="L295"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{2764}\u{FE0E}&quot;</span>, .half)); <span class="tok-comment">// Default text presentation with VS15 selector</span>
</span>
<span class="line" id="L296"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">2</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\u{2764}\u{FE0F}&quot;</span>, .half)); <span class="tok-comment">// Default text presentation with VS16 selector</span>
</span>
<span class="line" id="L297"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">0</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;A\x08&quot;</span>, .half)); <span class="tok-comment">// Backspace</span>
</span>
<span class="line" id="L298"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">0</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\x7FA&quot;</span>, .half)); <span class="tok-comment">// DEL</span>
</span>
<span class="line" id="L299"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">0</span>), <span class="tok-kw">try</span> strWidth(<span class="tok-str">&quot;\x7FA\x08\x08&quot;</span>, .half)); <span class="tok-comment">// never less than o</span>
</span>
<span class="line" id="L300">}</span>
<span class="line" id="L301"></span>
<span class="line" id="L302"><span class="tok-kw">test</span> <span class="tok-str">&quot;display_width center&quot;</span> {</span>
<span class="line" id="L303"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L304"></span>
<span class="line" id="L305"> <span class="tok-comment">// Input and width both have odd length</span>
</span>
<span class="line" id="L306"> <span class="tok-kw">var</span> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;abc&quot;</span>, <span class="tok-number">9</span>, <span class="tok-str">&quot;*&quot;</span>);</span>
<span class="line" id="L307"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;***abc***&quot;</span>, centered);</span>
<span class="line" id="L308"></span>
<span class="line" id="L309"> <span class="tok-comment">// Input and width both have even length</span>
</span>
<span class="line" id="L310"> allocator.free(centered);</span>
<span class="line" id="L311"> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;w😊w&quot;</span>, <span class="tok-number">10</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L312"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;---w😊w---&quot;</span>, centered);</span>
<span class="line" id="L313"></span>
<span class="line" id="L314"> <span class="tok-comment">// Input has even length, width has odd length</span>
</span>
<span class="line" id="L315"> allocator.free(centered);</span>
<span class="line" id="L316"> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;1234&quot;</span>, <span class="tok-number">9</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L317"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;--1234---&quot;</span>, centered);</span>
<span class="line" id="L318"></span>
<span class="line" id="L319"> <span class="tok-comment">// Input has odd length, width has even length</span>
</span>
<span class="line" id="L320"> allocator.free(centered);</span>
<span class="line" id="L321"> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;123&quot;</span>, <span class="tok-number">8</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L322"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;--123---&quot;</span>, centered);</span>
<span class="line" id="L323"></span>
<span class="line" id="L324"> <span class="tok-comment">// Input is the same length as the width</span>
</span>
<span class="line" id="L325"> allocator.free(centered);</span>
<span class="line" id="L326"> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;123&quot;</span>, <span class="tok-number">3</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L327"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;123&quot;</span>, centered);</span>
<span class="line" id="L328"></span>
<span class="line" id="L329"> <span class="tok-comment">// Input is empty</span>
</span>
<span class="line" id="L330"> allocator.free(centered);</span>
<span class="line" id="L331"> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;&quot;</span>, <span class="tok-number">3</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L332"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;---&quot;</span>, centered);</span>
<span class="line" id="L333"></span>
<span class="line" id="L334"> <span class="tok-comment">// Input is empty and width is zero</span>
</span>
<span class="line" id="L335"> allocator.free(centered);</span>
<span class="line" id="L336"> centered = <span class="tok-kw">try</span> center(allocator, <span class="tok-str">&quot;&quot;</span>, <span class="tok-number">0</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L337"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;&quot;</span>, centered);</span>
<span class="line" id="L338"></span>
<span class="line" id="L339"> <span class="tok-comment">// Input is longer than the width, which is an error</span>
</span>
<span class="line" id="L340"> allocator.free(centered);</span>
<span class="line" id="L341"> <span class="tok-kw">try</span> std.testing.expectError(<span class="tok-kw">error</span>.StrTooLong, center(allocator, <span class="tok-str">&quot;123&quot;</span>, <span class="tok-number">2</span>, <span class="tok-str">&quot;-&quot;</span>));</span>
<span class="line" id="L342">}</span>
<span class="line" id="L343"></span>
<span class="line" id="L344"><span class="tok-kw">test</span> <span class="tok-str">&quot;display_width padLeft&quot;</span> {</span>
<span class="line" id="L345"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L346"></span>
<span class="line" id="L347"> <span class="tok-kw">var</span> right_aligned = <span class="tok-kw">try</span> padLeft(allocator, <span class="tok-str">&quot;abc&quot;</span>, <span class="tok-number">9</span>, <span class="tok-str">&quot;*&quot;</span>);</span>
<span class="line" id="L348"> <span class="tok-kw">defer</span> allocator.free(right_aligned);</span>
<span class="line" id="L349"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;******abc&quot;</span>, right_aligned);</span>
<span class="line" id="L350"></span>
<span class="line" id="L351"> allocator.free(right_aligned);</span>
<span class="line" id="L352"> right_aligned = <span class="tok-kw">try</span> padLeft(allocator, <span class="tok-str">&quot;w😊w&quot;</span>, <span class="tok-number">10</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L353"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;------w😊w&quot;</span>, right_aligned);</span>
<span class="line" id="L354">}</span>
<span class="line" id="L355"></span>
<span class="line" id="L356"><span class="tok-kw">test</span> <span class="tok-str">&quot;display_width padRight&quot;</span> {</span>
<span class="line" id="L357"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L358"></span>
<span class="line" id="L359"> <span class="tok-kw">var</span> left_aligned = <span class="tok-kw">try</span> padRight(allocator, <span class="tok-str">&quot;abc&quot;</span>, <span class="tok-number">9</span>, <span class="tok-str">&quot;*&quot;</span>);</span>
<span class="line" id="L360"> <span class="tok-kw">defer</span> allocator.free(left_aligned);</span>
<span class="line" id="L361"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;abc******&quot;</span>, left_aligned);</span>
<span class="line" id="L362"></span>
<span class="line" id="L363"> allocator.free(left_aligned);</span>
<span class="line" id="L364"> left_aligned = <span class="tok-kw">try</span> padRight(allocator, <span class="tok-str">&quot;w😊w&quot;</span>, <span class="tok-number">10</span>, <span class="tok-str">&quot;-&quot;</span>);</span>
<span class="line" id="L365"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u8</span>, <span class="tok-str">&quot;w😊w------&quot;</span>, left_aligned);</span>
<span class="line" id="L366">}</span>
<span class="line" id="L367"></span>
<span class="line" id="L368"><span class="tok-kw">test</span> <span class="tok-str">&quot;display_width wrap&quot;</span> {</span>
<span class="line" id="L369"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L370"> <span class="tok-kw">const</span> input = <span class="tok-str">&quot;The quick brown fox\r\njumped over the lazy dog!&quot;</span>;</span>
<span class="line" id="L371"> <span class="tok-kw">const</span> got = <span class="tok-kw">try</span> wrap(allocator, input, <span class="tok-number">10</span>, <span class="tok-number">3</span>);</span>
<span class="line" id="L372"> <span class="tok-kw">defer</span> allocator.free(got);</span>
<span class="line" id="L373"> <span class="tok-kw">const</span> want = <span class="tok-str">&quot;The quick\n brown \nfox jumped\n over the\n lazy dog\n!&quot;</span>;</span>
<span class="line" id="L374"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(want, got);</span>
<span class="line" id="L375">}</span>
<span class="line" id="L376"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! Normalizer contains functions and methods that implement Unicode Normalization algorithms. You can normalize strings</span></span>
<span class="line" id="L2"><span class="tok-comment">//! into NFC, NFKC, NFD, and NFKD normalization forms (see `nfc`, `nfkc`, `nfd`, and `nfkd`). You can also test for</span></span>
<span class="line" id="L3"><span class="tok-comment">//! string equality under different parameters related to normalization (see `eql`, `eqlCaseless`, `eqlIdentifiers`).</span></span>
<span class="line" id="L4"></span>
<span class="line" id="L5"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L6"></span>
<span class="line" id="L7"><span class="tok-kw">const</span> CodePointIterator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../segmenter/CodePoint.zig&quot;</span>).CodePointIterator;</span>
<span class="line" id="L8"><span class="tok-kw">const</span> case_fold_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/case_folding.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">const</span> ccc_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_combining_class.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> hangul_map = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/hangul_syllable_type.zig&quot;</span>);</span>
<span class="line" id="L11"><span class="tok-kw">const</span> norm_props = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/derived_normalization_props.zig&quot;</span>);</span>
<span class="line" id="L12"></span>
<span class="line" id="L13"><span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L14"></span>
<span class="line" id="L15">nfc_map: std.AutoHashMap([<span class="tok-number">2</span>]<span class="tok-type">u21</span>, <span class="tok-type">u21</span>),</span>
<span class="line" id="L16">nfd_map: std.AutoHashMap(<span class="tok-type">u21</span>, [<span class="tok-number">2</span>]<span class="tok-type">u21</span>),</span>
<span class="line" id="L17">nfkd_map: std.AutoHashMap(<span class="tok-type">u21</span>, [<span class="tok-number">18</span>]<span class="tok-type">u21</span>),</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: std.mem.Allocator) !Self {</span>
<span class="line" id="L20"> <span class="tok-kw">var</span> self = Self{</span>
<span class="line" id="L21"> .nfc_map = std.AutoHashMap([<span class="tok-number">2</span>]<span class="tok-type">u21</span>, <span class="tok-type">u21</span>).init(allocator),</span>
<span class="line" id="L22"> .nfd_map = std.AutoHashMap(<span class="tok-type">u21</span>, [<span class="tok-number">2</span>]<span class="tok-type">u21</span>).init(allocator),</span>
<span class="line" id="L23"> .nfkd_map = std.AutoHashMap(<span class="tok-type">u21</span>, [<span class="tok-number">18</span>]<span class="tok-type">u21</span>).init(allocator),</span>
<span class="line" id="L24"> };</span>
<span class="line" id="L25"> <span class="tok-kw">errdefer</span> self.deinit();</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"> <span class="tok-comment">// Canonical compositions</span>
</span>
<span class="line" id="L28"> <span class="tok-kw">const</span> decompressor = std.compress.deflate.decompressor;</span>
<span class="line" id="L29"> <span class="tok-kw">const</span> comp_file = <span class="tok-builtin">@embedFile</span>(<span class="tok-str">&quot;../autogen/canonical_compositions.txt.deflate&quot;</span>);</span>
<span class="line" id="L30"> <span class="tok-kw">var</span> comp_stream = std.io.fixedBufferStream(comp_file);</span>
<span class="line" id="L31"> <span class="tok-kw">var</span> comp_decomp = <span class="tok-kw">try</span> decompressor(allocator, comp_stream.reader(), <span class="tok-null">null</span>);</span>
<span class="line" id="L32"> <span class="tok-kw">defer</span> comp_decomp.deinit();</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"> <span class="tok-kw">var</span> comp_buf = std.io.bufferedReader(comp_decomp.reader());</span>
<span class="line" id="L35"> <span class="tok-kw">const</span> comp_reader = comp_buf.reader();</span>
<span class="line" id="L36"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4096</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L37"></span>
<span class="line" id="L38"> <span class="tok-kw">while</span> (<span class="tok-kw">try</span> comp_reader.readUntilDelimiterOrEof(&amp;buf, <span class="tok-str">'\n'</span>)) |line| {</span>
<span class="line" id="L39"> <span class="tok-kw">if</span> (line.len == <span class="tok-number">0</span>) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L40"> <span class="tok-kw">var</span> fields = std.mem.split(<span class="tok-type">u8</span>, line, <span class="tok-str">&quot;;&quot;</span>);</span>
<span class="line" id="L41"> <span class="tok-kw">const</span> cp_a = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L42"> <span class="tok-kw">const</span> cp_b = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L43"> <span class="tok-kw">const</span> cp_c = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L44"> <span class="tok-kw">try</span> self.nfc_map.put(.{ cp_a, cp_b }, cp_c);</span>
<span class="line" id="L45"> }</span>
<span class="line" id="L46"></span>
<span class="line" id="L47"> <span class="tok-comment">// Canonical decompositions</span>
</span>
<span class="line" id="L48"> <span class="tok-kw">const</span> decomp_file = <span class="tok-builtin">@embedFile</span>(<span class="tok-str">&quot;../autogen/canonical_decompositions.txt.deflate&quot;</span>);</span>
<span class="line" id="L49"> <span class="tok-kw">var</span> decomp_stream = std.io.fixedBufferStream(decomp_file);</span>
<span class="line" id="L50"> <span class="tok-kw">var</span> decomp_decomp = <span class="tok-kw">try</span> decompressor(allocator, decomp_stream.reader(), <span class="tok-null">null</span>);</span>
<span class="line" id="L51"> <span class="tok-kw">defer</span> decomp_decomp.deinit();</span>
<span class="line" id="L52"></span>
<span class="line" id="L53"> <span class="tok-kw">var</span> decomp_buf = std.io.bufferedReader(decomp_decomp.reader());</span>
<span class="line" id="L54"> <span class="tok-kw">const</span> decomp_reader = decomp_buf.reader();</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"> <span class="tok-kw">while</span> (<span class="tok-kw">try</span> decomp_reader.readUntilDelimiterOrEof(&amp;buf, <span class="tok-str">'\n'</span>)) |line| {</span>
<span class="line" id="L57"> <span class="tok-kw">if</span> (line.len == <span class="tok-number">0</span>) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L58"> <span class="tok-kw">var</span> fields = std.mem.split(<span class="tok-type">u8</span>, line, <span class="tok-str">&quot;;&quot;</span>);</span>
<span class="line" id="L59"> <span class="tok-kw">const</span> cp_a = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L60"> <span class="tok-kw">const</span> cp_b = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L61"> <span class="tok-kw">const</span> cp_c = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L62"> <span class="tok-kw">try</span> self.nfd_map.put(cp_a, .{ cp_b, cp_c });</span>
<span class="line" id="L63"> }</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> <span class="tok-comment">// Compatibility decompositions</span>
</span>
<span class="line" id="L66"> <span class="tok-kw">const</span> dekomp_file = <span class="tok-builtin">@embedFile</span>(<span class="tok-str">&quot;../autogen/compatibility_decompositions.txt.deflate&quot;</span>);</span>
<span class="line" id="L67"> <span class="tok-kw">var</span> dekomp_stream = std.io.fixedBufferStream(dekomp_file);</span>
<span class="line" id="L68"> <span class="tok-kw">var</span> dekomp_decomp = <span class="tok-kw">try</span> decompressor(allocator, dekomp_stream.reader(), <span class="tok-null">null</span>);</span>
<span class="line" id="L69"> <span class="tok-kw">defer</span> dekomp_decomp.deinit();</span>
<span class="line" id="L70"></span>
<span class="line" id="L71"> <span class="tok-kw">var</span> dekomp_buf = std.io.bufferedReader(dekomp_decomp.reader());</span>
<span class="line" id="L72"> <span class="tok-kw">const</span> dekomp_reader = dekomp_buf.reader();</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"> <span class="tok-kw">while</span> (<span class="tok-kw">try</span> dekomp_reader.readUntilDelimiterOrEof(&amp;buf, <span class="tok-str">'\n'</span>)) |line| {</span>
<span class="line" id="L75"> <span class="tok-kw">if</span> (line.len == <span class="tok-number">0</span>) <span class="tok-kw">continue</span>;</span>
<span class="line" id="L76"> <span class="tok-kw">var</span> fields = std.mem.split(<span class="tok-type">u8</span>, line, <span class="tok-str">&quot;;&quot;</span>);</span>
<span class="line" id="L77"> <span class="tok-kw">const</span> cp_a = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, fields.next().?, <span class="tok-number">16</span>);</span>
<span class="line" id="L78"> <span class="tok-kw">var</span> cps = [_]<span class="tok-type">u21</span>{<span class="tok-number">0</span>} ** <span class="tok-number">18</span>;</span>
<span class="line" id="L79"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"> <span class="tok-kw">while</span> (fields.next()) |cp| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L82"> cps[i] = <span class="tok-kw">try</span> std.fmt.parseInt(<span class="tok-type">u21</span>, cp, <span class="tok-number">16</span>);</span>
<span class="line" id="L83"> }</span>
<span class="line" id="L84"></span>
<span class="line" id="L85"> <span class="tok-kw">try</span> self.nfkd_map.put(cp_a, cps);</span>
<span class="line" id="L86"> }</span>
<span class="line" id="L87"></span>
<span class="line" id="L88"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L89">}</span>
<span class="line" id="L90"></span>
<span class="line" id="L91"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L92"> self.nfc_map.deinit();</span>
<span class="line" id="L93"> self.nfd_map.deinit();</span>
<span class="line" id="L94"> self.nfkd_map.deinit();</span>
<span class="line" id="L95">}</span>
<span class="line" id="L96"></span>
<span class="line" id="L97"><span class="tok-kw">test</span> <span class="tok-str">&quot;init / deinit&quot;</span> {</span>
<span class="line" id="L98"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(std.testing.allocator);</span>
<span class="line" id="L99"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L100">}</span>
<span class="line" id="L101"><span class="tok-comment">// Hangul processing utilities.</span>
</span>
<span class="line" id="L102"><span class="tok-kw">fn</span> <span class="tok-fn">isHangulPrecomposed</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L103"> <span class="tok-kw">if</span> (hangul_map.syllableType(cp)) |kind| <span class="tok-kw">return</span> kind == .LV <span class="tok-kw">or</span> kind == .LVT;</span>
<span class="line" id="L104"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L105">}</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"><span class="tok-kw">const</span> SBase: <span class="tok-type">u21</span> = <span class="tok-number">0xAC00</span>;</span>
<span class="line" id="L108"><span class="tok-kw">const</span> LBase: <span class="tok-type">u21</span> = <span class="tok-number">0x1100</span>;</span>
<span class="line" id="L109"><span class="tok-kw">const</span> VBase: <span class="tok-type">u21</span> = <span class="tok-number">0x1161</span>;</span>
<span class="line" id="L110"><span class="tok-kw">const</span> TBase: <span class="tok-type">u21</span> = <span class="tok-number">0x11A7</span>;</span>
<span class="line" id="L111"><span class="tok-kw">const</span> LCount: <span class="tok-type">u21</span> = <span class="tok-number">19</span>;</span>
<span class="line" id="L112"><span class="tok-kw">const</span> VCount: <span class="tok-type">u21</span> = <span class="tok-number">21</span>;</span>
<span class="line" id="L113"><span class="tok-kw">const</span> TCount: <span class="tok-type">u21</span> = <span class="tok-number">28</span>;</span>
<span class="line" id="L114"><span class="tok-kw">const</span> NCount: <span class="tok-type">u21</span> = <span class="tok-number">588</span>; <span class="tok-comment">// VCount * TCount</span>
</span>
<span class="line" id="L115"><span class="tok-kw">const</span> SCount: <span class="tok-type">u21</span> = <span class="tok-number">11172</span>; <span class="tok-comment">// LCount * NCount</span>
</span>
<span class="line" id="L116"></span>
<span class="line" id="L117"><span class="tok-kw">fn</span> <span class="tok-fn">decomposeHangul</span>(cp: <span class="tok-type">u21</span>) [<span class="tok-number">3</span>]<span class="tok-type">u21</span> {</span>
<span class="line" id="L118"> <span class="tok-kw">const</span> SIndex: <span class="tok-type">u21</span> = cp - SBase;</span>
<span class="line" id="L119"> <span class="tok-kw">const</span> LIndex: <span class="tok-type">u21</span> = SIndex / NCount;</span>
<span class="line" id="L120"> <span class="tok-kw">const</span> VIndex: <span class="tok-type">u21</span> = (SIndex % NCount) / TCount;</span>
<span class="line" id="L121"> <span class="tok-kw">const</span> TIndex: <span class="tok-type">u21</span> = SIndex % TCount;</span>
<span class="line" id="L122"> <span class="tok-kw">const</span> LPart: <span class="tok-type">u21</span> = LBase + LIndex;</span>
<span class="line" id="L123"> <span class="tok-kw">const</span> VPart: <span class="tok-type">u21</span> = VBase + VIndex;</span>
<span class="line" id="L124"> <span class="tok-kw">var</span> TPart: <span class="tok-type">u21</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L125"> <span class="tok-kw">if</span> (TIndex != <span class="tok-number">0</span>) TPart = TBase + TIndex;</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"> <span class="tok-kw">return</span> [<span class="tok-number">3</span>]<span class="tok-type">u21</span>{ LPart, VPart, TPart };</span>
<span class="line" id="L128">}</span>
<span class="line" id="L129"></span>
<span class="line" id="L130"><span class="tok-kw">fn</span> <span class="tok-fn">composeHangulCanon</span>(lv: <span class="tok-type">u21</span>, t: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L131"> std.debug.assert(<span class="tok-number">0x11A8</span> &lt;= t <span class="tok-kw">and</span> t &lt;= <span class="tok-number">0x11C2</span>);</span>
<span class="line" id="L132"> <span class="tok-kw">return</span> lv + (t - TBase);</span>
<span class="line" id="L133">}</span>
<span class="line" id="L134"></span>
<span class="line" id="L135"><span class="tok-kw">fn</span> <span class="tok-fn">composeHangulFull</span>(l: <span class="tok-type">u21</span>, v: <span class="tok-type">u21</span>, t: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L136"> std.debug.assert(<span class="tok-number">0x1100</span> &lt;= l <span class="tok-kw">and</span> l &lt;= <span class="tok-number">0x1112</span>);</span>
<span class="line" id="L137"> std.debug.assert(<span class="tok-number">0x1161</span> &lt;= v <span class="tok-kw">and</span> v &lt;= <span class="tok-number">0x1175</span>);</span>
<span class="line" id="L138"> <span class="tok-kw">const</span> LIndex = l - LBase;</span>
<span class="line" id="L139"> <span class="tok-kw">const</span> VIndex = v - VBase;</span>
<span class="line" id="L140"> <span class="tok-kw">const</span> LVIndex = LIndex * NCount + VIndex * TCount;</span>
<span class="line" id="L141"></span>
<span class="line" id="L142"> <span class="tok-kw">if</span> (t == <span class="tok-number">0</span>) <span class="tok-kw">return</span> SBase + LVIndex;</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> std.debug.assert(<span class="tok-number">0x11A8</span> &lt;= t <span class="tok-kw">and</span> t &lt;= <span class="tok-number">0x11C2</span>);</span>
<span class="line" id="L145"> <span class="tok-kw">const</span> TIndex = t - TBase;</span>
<span class="line" id="L146"></span>
<span class="line" id="L147"> <span class="tok-kw">return</span> SBase + LVIndex + TIndex;</span>
<span class="line" id="L148">}</span>
<span class="line" id="L149"></span>
<span class="line" id="L150"><span class="tok-kw">const</span> Form = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L151"> nfc,</span>
<span class="line" id="L152"> nfd,</span>
<span class="line" id="L153"> nfkc,</span>
<span class="line" id="L154"> nfkd,</span>
<span class="line" id="L155"> same,</span>
<span class="line" id="L156">};</span>
<span class="line" id="L157"></span>
<span class="line" id="L158"><span class="tok-kw">const</span> Decomp = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L159"> form: Form = .nfd,</span>
<span class="line" id="L160"> cps: [<span class="tok-number">18</span>]<span class="tok-type">u21</span> = [_]<span class="tok-type">u21</span>{<span class="tok-number">0</span>} ** <span class="tok-number">18</span>,</span>
<span class="line" id="L161">};</span>
<span class="line" id="L162"></span>
<span class="line" id="L163"><span class="tok-comment">/// `mapping` retrieves the decomposition mapping for a code point as per the UCD.</span></span>
<span class="line" id="L164"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">mapping</span>(self: Self, cp: <span class="tok-type">u21</span>, form: Form) Decomp {</span>
<span class="line" id="L165"> std.debug.assert(form == .nfd <span class="tok-kw">or</span> form == .nfkd);</span>
<span class="line" id="L166"></span>
<span class="line" id="L167"> <span class="tok-kw">var</span> dc = Decomp{ .form = .same };</span>
<span class="line" id="L168"> dc.cps[<span class="tok-number">0</span>] = cp;</span>
<span class="line" id="L169"></span>
<span class="line" id="L170"> <span class="tok-kw">if</span> (self.nfkd_map.get(cp)) |array| {</span>
<span class="line" id="L171"> <span class="tok-kw">if</span> (form != .nfd) {</span>
<span class="line" id="L172"> dc.form = .nfkd;</span>
<span class="line" id="L173"> <span class="tok-builtin">@memcpy</span>(dc.cps[<span class="tok-number">0</span>..array.len], &amp;array);</span>
<span class="line" id="L174"> }</span>
<span class="line" id="L175"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (self.nfd_map.get(cp)) |array| {</span>
<span class="line" id="L176"> dc.form = .nfd;</span>
<span class="line" id="L177"> <span class="tok-builtin">@memcpy</span>(dc.cps[<span class="tok-number">0</span>..array.len], &amp;array);</span>
<span class="line" id="L178"> }</span>
<span class="line" id="L179"></span>
<span class="line" id="L180"> <span class="tok-kw">return</span> dc;</span>
<span class="line" id="L181">}</span>
<span class="line" id="L182"></span>
<span class="line" id="L183"><span class="tok-comment">/// `decompose` a code point to the specified normalization form, which should be either `.nfd` or `.nfkd`.</span></span>
<span class="line" id="L184"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">decompose</span>(self: Self, cp: <span class="tok-type">u21</span>, form: Form) Decomp {</span>
<span class="line" id="L185"> std.debug.assert(form == .nfd <span class="tok-kw">or</span> form == .nfkd);</span>
<span class="line" id="L186"></span>
<span class="line" id="L187"> <span class="tok-kw">var</span> dc = Decomp{ .form = form };</span>
<span class="line" id="L188"></span>
<span class="line" id="L189"> <span class="tok-comment">// ASCII or NFD / NFKD quick checks.</span>
</span>
<span class="line" id="L190"> <span class="tok-kw">if</span> (cp &lt;= <span class="tok-number">127</span> <span class="tok-kw">or</span> (form == .nfd <span class="tok-kw">and</span> norm_props.isNfd(cp)) <span class="tok-kw">or</span> (form == .nfkd <span class="tok-kw">and</span> norm_props.isNfkd(cp))) {</span>
<span class="line" id="L191"> dc.cps[<span class="tok-number">0</span>] = cp;</span>
<span class="line" id="L192"> <span class="tok-kw">return</span> dc;</span>
<span class="line" id="L193"> }</span>
<span class="line" id="L194"></span>
<span class="line" id="L195"> <span class="tok-comment">// Hangul precomposed syllable full decomposition.</span>
</span>
<span class="line" id="L196"> <span class="tok-kw">if</span> (isHangulPrecomposed(cp)) {</span>
<span class="line" id="L197"> <span class="tok-kw">const</span> cps = decomposeHangul(cp);</span>
<span class="line" id="L198"> <span class="tok-builtin">@memcpy</span>(dc.cps[<span class="tok-number">0</span>..cps.len], &amp;cps);</span>
<span class="line" id="L199"> <span class="tok-kw">return</span> dc;</span>
<span class="line" id="L200"> }</span>
<span class="line" id="L201"></span>
<span class="line" id="L202"> <span class="tok-comment">// Full decomposition.</span>
</span>
<span class="line" id="L203"> <span class="tok-kw">var</span> result_index: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L204"> <span class="tok-kw">var</span> work_index: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L205"></span>
<span class="line" id="L206"> <span class="tok-comment">// Start work with argument code point.</span>
</span>
<span class="line" id="L207"> <span class="tok-kw">var</span> work = [_]<span class="tok-type">u21</span>{cp} ++ [_]<span class="tok-type">u21</span>{<span class="tok-number">0</span>} ** <span class="tok-number">17</span>;</span>
<span class="line" id="L208"></span>
<span class="line" id="L209"> <span class="tok-kw">while</span> (work_index &gt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L210"> <span class="tok-comment">// Look at previous code point in work queue.</span>
</span>
<span class="line" id="L211"> work_index -= <span class="tok-number">1</span>;</span>
<span class="line" id="L212"> <span class="tok-kw">const</span> next = work[work_index];</span>
<span class="line" id="L213"> <span class="tok-kw">const</span> m = self.mapping(next, form);</span>
<span class="line" id="L214"></span>
<span class="line" id="L215"> <span class="tok-comment">// No more of decompositions for this code point.</span>
</span>
<span class="line" id="L216"> <span class="tok-kw">if</span> (m.form == .same) {</span>
<span class="line" id="L217"> dc.cps[result_index] = m.cps[<span class="tok-number">0</span>];</span>
<span class="line" id="L218"> result_index += <span class="tok-number">1</span>;</span>
<span class="line" id="L219"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L220"> }</span>
<span class="line" id="L221"></span>
<span class="line" id="L222"> <span class="tok-comment">// Find last index of decomposition.</span>
</span>
<span class="line" id="L223"> <span class="tok-kw">const</span> m_last = <span class="tok-kw">for</span> (m.cps, <span class="tok-number">0</span>..) |mcp, i| {</span>
<span class="line" id="L224"> <span class="tok-kw">if</span> (mcp == <span class="tok-number">0</span>) <span class="tok-kw">break</span> i;</span>
<span class="line" id="L225"> } <span class="tok-kw">else</span> m.cps.len;</span>
<span class="line" id="L226"></span>
<span class="line" id="L227"> <span class="tok-comment">// Work backwards through decomposition.</span>
</span>
<span class="line" id="L228"> <span class="tok-comment">// `i` starts at 1 because m_last is 1 past the last code point.</span>
</span>
<span class="line" id="L229"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L230"> <span class="tok-kw">while</span> (i &lt;= m_last) : ({</span>
<span class="line" id="L231"> i += <span class="tok-number">1</span>;</span>
<span class="line" id="L232"> work_index += <span class="tok-number">1</span>;</span>
<span class="line" id="L233"> }) {</span>
<span class="line" id="L234"> work[work_index] = m.cps[m_last - i];</span>
<span class="line" id="L235"> }</span>
<span class="line" id="L236"> }</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"> <span class="tok-kw">return</span> dc;</span>
<span class="line" id="L239">}</span>
<span class="line" id="L240"></span>
<span class="line" id="L241"><span class="tok-kw">test</span> <span class="tok-str">&quot;decompose&quot;</span> {</span>
<span class="line" id="L242"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L243"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L244"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"> <span class="tok-kw">var</span> dc = n.decompose(<span class="tok-str">'é'</span>, .nfd);</span>
<span class="line" id="L247"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfd);</span>
<span class="line" id="L248"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'e'</span>, <span class="tok-str">'\u{301}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">2</span>]);</span>
<span class="line" id="L249"></span>
<span class="line" id="L250"> dc = n.decompose(<span class="tok-str">'\u{1e0a}'</span>, .nfd);</span>
<span class="line" id="L251"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfd);</span>
<span class="line" id="L252"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'D'</span>, <span class="tok-str">'\u{307}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">2</span>]);</span>
<span class="line" id="L253"></span>
<span class="line" id="L254"> dc = n.decompose(<span class="tok-str">'\u{1e0a}'</span>, .nfkd);</span>
<span class="line" id="L255"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfkd);</span>
<span class="line" id="L256"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'D'</span>, <span class="tok-str">'\u{307}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">2</span>]);</span>
<span class="line" id="L257"></span>
<span class="line" id="L258"> dc = n.decompose(<span class="tok-str">'\u{3189}'</span>, .nfd);</span>
<span class="line" id="L259"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfd);</span>
<span class="line" id="L260"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{<span class="tok-str">'\u{3189}'</span>}, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">1</span>]);</span>
<span class="line" id="L261"></span>
<span class="line" id="L262"> dc = n.decompose(<span class="tok-str">'\u{3189}'</span>, .nfkd);</span>
<span class="line" id="L263"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfkd);</span>
<span class="line" id="L264"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{<span class="tok-str">'\u{1188}'</span>}, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">1</span>]);</span>
<span class="line" id="L265"></span>
<span class="line" id="L266"> dc = n.decompose(<span class="tok-str">'\u{ace1}'</span>, .nfd);</span>
<span class="line" id="L267"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfd);</span>
<span class="line" id="L268"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'\u{1100}'</span>, <span class="tok-str">'\u{1169}'</span>, <span class="tok-str">'\u{11a8}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">3</span>]);</span>
<span class="line" id="L269"></span>
<span class="line" id="L270"> dc = n.decompose(<span class="tok-str">'\u{ace1}'</span>, .nfkd);</span>
<span class="line" id="L271"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfkd);</span>
<span class="line" id="L272"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'\u{1100}'</span>, <span class="tok-str">'\u{1169}'</span>, <span class="tok-str">'\u{11a8}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">3</span>]);</span>
<span class="line" id="L273"></span>
<span class="line" id="L274"> dc = n.decompose(<span class="tok-str">'\u{3d3}'</span>, .nfd);</span>
<span class="line" id="L275"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfd);</span>
<span class="line" id="L276"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'\u{3d2}'</span>, <span class="tok-str">'\u{301}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">2</span>]);</span>
<span class="line" id="L277"></span>
<span class="line" id="L278"> dc = n.decompose(<span class="tok-str">'\u{3d3}'</span>, .nfkd);</span>
<span class="line" id="L279"> <span class="tok-kw">try</span> std.testing.expect(dc.form == .nfkd);</span>
<span class="line" id="L280"> <span class="tok-kw">try</span> std.testing.expectEqualSlices(<span class="tok-type">u21</span>, &amp;[_]<span class="tok-type">u21</span>{ <span class="tok-str">'\u{3a5}'</span>, <span class="tok-str">'\u{301}'</span> }, dc.cps[<span class="tok-number">0</span>..<span class="tok-number">2</span>]);</span>
<span class="line" id="L281">}</span>
<span class="line" id="L282"></span>
<span class="line" id="L283"><span class="tok-comment">// Some quick checks.</span>
</span>
<span class="line" id="L284"></span>
<span class="line" id="L285"><span class="tok-kw">fn</span> <span class="tok-fn">onlyAscii</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L286"> <span class="tok-kw">return</span> <span class="tok-kw">for</span> (str) |b| {</span>
<span class="line" id="L287"> <span class="tok-kw">if</span> (b &gt; <span class="tok-number">127</span>) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L288"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L289">}</span>
<span class="line" id="L290"></span>
<span class="line" id="L291"><span class="tok-kw">fn</span> <span class="tok-fn">onlyLatin1</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L292"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L293"> <span class="tok-kw">return</span> <span class="tok-kw">while</span> (cp_iter.next()) |cp| {</span>
<span class="line" id="L294"> <span class="tok-kw">if</span> (cp.code &gt; <span class="tok-number">256</span>) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L295"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L296">}</span>
<span class="line" id="L297"></span>
<span class="line" id="L298"><span class="tok-comment">/// Returned from various functions in this namespace. Remember to call `deinit` to free any allocated memory.</span></span>
<span class="line" id="L299"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Result = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L300"> allocator: ?std.mem.Allocator = <span class="tok-null">null</span>,</span>
<span class="line" id="L301"> slice: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L302"></span>
<span class="line" id="L303"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Result) <span class="tok-type">void</span> {</span>
<span class="line" id="L304"> <span class="tok-kw">if</span> (self.allocator) |allocator| allocator.free(self.slice);</span>
<span class="line" id="L305"> }</span>
<span class="line" id="L306">};</span>
<span class="line" id="L307"></span>
<span class="line" id="L308"><span class="tok-comment">// Compares code points by Canonical Combining Class order.</span>
</span>
<span class="line" id="L309"><span class="tok-kw">fn</span> <span class="tok-fn">cccLess</span>(_: <span class="tok-type">void</span>, lhs: <span class="tok-type">u21</span>, rhs: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L310"> <span class="tok-kw">return</span> ccc_map.combiningClass(lhs) &lt; ccc_map.combiningClass(rhs);</span>
<span class="line" id="L311">}</span>
<span class="line" id="L312"></span>
<span class="line" id="L313"><span class="tok-comment">// Applies the Canonical Sorting Algorithm.</span>
</span>
<span class="line" id="L314"><span class="tok-kw">fn</span> <span class="tok-fn">canonicalSort</span>(cps: []<span class="tok-type">u21</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L315"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L316"> <span class="tok-kw">while</span> (i &lt; cps.len) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L317"> <span class="tok-kw">const</span> start: <span class="tok-type">usize</span> = i;</span>
<span class="line" id="L318"> <span class="tok-kw">while</span> (i &lt; cps.len <span class="tok-kw">and</span> ccc_map.combiningClass(cps[i]) != <span class="tok-number">0</span>) : (i += <span class="tok-number">1</span>) {}</span>
<span class="line" id="L319"> std.mem.sort(<span class="tok-type">u21</span>, cps[start..i], {}, cccLess);</span>
<span class="line" id="L320"> }</span>
<span class="line" id="L321">}</span>
<span class="line" id="L322"></span>
<span class="line" id="L323"><span class="tok-comment">/// Normalize `str` to NFD.</span></span>
<span class="line" id="L324"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">nfd</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Result {</span>
<span class="line" id="L325"> <span class="tok-kw">return</span> self.nfxd(allocator, str, .nfd);</span>
<span class="line" id="L326">}</span>
<span class="line" id="L327"></span>
<span class="line" id="L328"><span class="tok-comment">/// Normalize `str` to NFKD.</span></span>
<span class="line" id="L329"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">nfkd</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Result {</span>
<span class="line" id="L330"> <span class="tok-kw">return</span> self.nfxd(allocator, str, .nfkd);</span>
<span class="line" id="L331">}</span>
<span class="line" id="L332"></span>
<span class="line" id="L333"><span class="tok-kw">fn</span> <span class="tok-fn">nfxd</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, form: Form) !Result {</span>
<span class="line" id="L334"> <span class="tok-comment">// Quick checks.</span>
</span>
<span class="line" id="L335"> <span class="tok-kw">if</span> (onlyAscii(str)) <span class="tok-kw">return</span> Result{ .slice = str };</span>
<span class="line" id="L336"></span>
<span class="line" id="L337"> <span class="tok-kw">var</span> dcp_list = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u21</span>).initCapacity(allocator, str.len + str.len / <span class="tok-number">2</span>);</span>
<span class="line" id="L338"> <span class="tok-kw">defer</span> dcp_list.deinit();</span>
<span class="line" id="L339"></span>
<span class="line" id="L340"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L341"> <span class="tok-kw">while</span> (cp_iter.next()) |cp| {</span>
<span class="line" id="L342"> <span class="tok-kw">const</span> dc = self.decompose(cp.code, form);</span>
<span class="line" id="L343"> <span class="tok-kw">const</span> slice = <span class="tok-kw">for</span> (dc.cps, <span class="tok-number">0</span>..) |dcp, i| {</span>
<span class="line" id="L344"> <span class="tok-kw">if</span> (dcp == <span class="tok-number">0</span>) <span class="tok-kw">break</span> dc.cps[<span class="tok-number">0</span>..i];</span>
<span class="line" id="L345"> } <span class="tok-kw">else</span> dc.cps[<span class="tok-number">0</span>..];</span>
<span class="line" id="L346"> <span class="tok-kw">try</span> dcp_list.appendSlice(slice);</span>
<span class="line" id="L347"> }</span>
<span class="line" id="L348"></span>
<span class="line" id="L349"> canonicalSort(dcp_list.items);</span>
<span class="line" id="L350"></span>
<span class="line" id="L351"> <span class="tok-kw">var</span> dstr_list = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u8</span>).initCapacity(allocator, dcp_list.items.len * <span class="tok-number">4</span>);</span>
<span class="line" id="L352"> <span class="tok-kw">defer</span> dstr_list.deinit();</span>
<span class="line" id="L353"></span>
<span class="line" id="L354"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L355"> <span class="tok-kw">for</span> (dcp_list.items) |dcp| {</span>
<span class="line" id="L356"> <span class="tok-kw">const</span> len = <span class="tok-kw">try</span> std.unicode.utf8Encode(dcp, &amp;buf);</span>
<span class="line" id="L357"> dstr_list.appendSliceAssumeCapacity(buf[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L358"> }</span>
<span class="line" id="L359"></span>
<span class="line" id="L360"> <span class="tok-kw">return</span> Result{ .allocator = allocator, .slice = <span class="tok-kw">try</span> dstr_list.toOwnedSlice() };</span>
<span class="line" id="L361">}</span>
<span class="line" id="L362"></span>
<span class="line" id="L363"><span class="tok-kw">test</span> <span class="tok-str">&quot;nfd ASCII / no-alloc&quot;</span> {</span>
<span class="line" id="L364"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L365"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L366"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L367"></span>
<span class="line" id="L368"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> n.nfd(allocator, <span class="tok-str">&quot;Hello World!&quot;</span>);</span>
<span class="line" id="L369"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L370"></span>
<span class="line" id="L371"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;Hello World!&quot;</span>, result.slice);</span>
<span class="line" id="L372">}</span>
<span class="line" id="L373"></span>
<span class="line" id="L374"><span class="tok-kw">test</span> <span class="tok-str">&quot;nfd !ASCII / alloc&quot;</span> {</span>
<span class="line" id="L375"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L376"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L377"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L378"></span>
<span class="line" id="L379"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> n.nfd(allocator, <span class="tok-str">&quot;Héllo World! \u{3d3}&quot;</span>);</span>
<span class="line" id="L380"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L381"></span>
<span class="line" id="L382"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;He\u{301}llo World! \u{3d2}\u{301}&quot;</span>, result.slice);</span>
<span class="line" id="L383">}</span>
<span class="line" id="L384"></span>
<span class="line" id="L385"><span class="tok-kw">test</span> <span class="tok-str">&quot;nfkd ASCII / no-alloc&quot;</span> {</span>
<span class="line" id="L386"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L387"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L388"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L389"></span>
<span class="line" id="L390"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> n.nfkd(allocator, <span class="tok-str">&quot;Hello World!&quot;</span>);</span>
<span class="line" id="L391"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L392"></span>
<span class="line" id="L393"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;Hello World!&quot;</span>, result.slice);</span>
<span class="line" id="L394">}</span>
<span class="line" id="L395"></span>
<span class="line" id="L396"><span class="tok-kw">test</span> <span class="tok-str">&quot;nfkd !ASCII / alloc&quot;</span> {</span>
<span class="line" id="L397"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L398"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L399"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L400"></span>
<span class="line" id="L401"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> n.nfkd(allocator, <span class="tok-str">&quot;Héllo World! \u{3d3}&quot;</span>);</span>
<span class="line" id="L402"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L403"></span>
<span class="line" id="L404"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;He\u{301}llo World! \u{3a5}\u{301}&quot;</span>, result.slice);</span>
<span class="line" id="L405">}</span>
<span class="line" id="L406"></span>
<span class="line" id="L407"><span class="tok-comment">// Composition utilities.</span>
</span>
<span class="line" id="L408"></span>
<span class="line" id="L409"><span class="tok-kw">fn</span> <span class="tok-fn">isHangul</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L410"> <span class="tok-kw">return</span> cp &gt;= <span class="tok-number">0x1100</span> <span class="tok-kw">and</span> hangul_map.syllableType(cp) != <span class="tok-null">null</span>;</span>
<span class="line" id="L411">}</span>
<span class="line" id="L412"></span>
<span class="line" id="L413"><span class="tok-kw">fn</span> <span class="tok-fn">isStarter</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L414"> <span class="tok-kw">return</span> ccc_map.combiningClass(cp) == <span class="tok-number">0</span>;</span>
<span class="line" id="L415">}</span>
<span class="line" id="L416"></span>
<span class="line" id="L417"><span class="tok-kw">fn</span> <span class="tok-fn">isCombining</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L418"> <span class="tok-kw">return</span> ccc_map.combiningClass(cp) != <span class="tok-number">0</span>;</span>
<span class="line" id="L419">}</span>
<span class="line" id="L420"></span>
<span class="line" id="L421"><span class="tok-kw">fn</span> <span class="tok-fn">isNonHangulStarter</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L422"> <span class="tok-kw">return</span> !isHangul(cp) <span class="tok-kw">and</span> isStarter(cp);</span>
<span class="line" id="L423">}</span>
<span class="line" id="L424"></span>
<span class="line" id="L425"><span class="tok-comment">/// Normalizes `str` to NFC.</span></span>
<span class="line" id="L426"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">nfc</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Result {</span>
<span class="line" id="L427"> <span class="tok-kw">return</span> self.nfxc(allocator, str, .nfc);</span>
<span class="line" id="L428">}</span>
<span class="line" id="L429"></span>
<span class="line" id="L430"><span class="tok-comment">/// Normalizes `str` to NFKC.</span></span>
<span class="line" id="L431"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">nfkc</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Result {</span>
<span class="line" id="L432"> <span class="tok-kw">return</span> self.nfxc(allocator, str, .nfkc);</span>
<span class="line" id="L433">}</span>
<span class="line" id="L434"></span>
<span class="line" id="L435"><span class="tok-kw">fn</span> <span class="tok-fn">nfxc</span>(self: Self, allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, form: Form) !Result {</span>
<span class="line" id="L436"> <span class="tok-comment">// Quick checks.</span>
</span>
<span class="line" id="L437"> <span class="tok-kw">if</span> (onlyAscii(str)) <span class="tok-kw">return</span> Result{ .slice = str };</span>
<span class="line" id="L438"> <span class="tok-kw">if</span> (form == .nfc <span class="tok-kw">and</span> onlyLatin1(str)) <span class="tok-kw">return</span> Result{ .slice = str };</span>
<span class="line" id="L439"></span>
<span class="line" id="L440"> <span class="tok-comment">// Decompose first.</span>
</span>
<span class="line" id="L441"> <span class="tok-kw">var</span> d_result = <span class="tok-kw">if</span> (form == .nfc)</span>
<span class="line" id="L442"> <span class="tok-kw">try</span> self.nfd(allocator, str)</span>
<span class="line" id="L443"> <span class="tok-kw">else</span></span>
<span class="line" id="L444"> <span class="tok-kw">try</span> self.nfkd(allocator, str);</span>
<span class="line" id="L445"> <span class="tok-kw">defer</span> d_result.deinit();</span>
<span class="line" id="L446"></span>
<span class="line" id="L447"> <span class="tok-comment">// Get code points.</span>
</span>
<span class="line" id="L448"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = d_result.slice };</span>
<span class="line" id="L449"></span>
<span class="line" id="L450"> <span class="tok-kw">var</span> d_list = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u21</span>).initCapacity(allocator, d_result.slice.len);</span>
<span class="line" id="L451"> <span class="tok-kw">defer</span> d_list.deinit();</span>
<span class="line" id="L452"></span>
<span class="line" id="L453"> <span class="tok-kw">while</span> (cp_iter.next()) |cp| d_list.appendAssumeCapacity(cp.code);</span>
<span class="line" id="L454"></span>
<span class="line" id="L455"> <span class="tok-comment">// Compose</span>
</span>
<span class="line" id="L456"> <span class="tok-kw">const</span> tombstone = <span class="tok-number">0xe000</span>; <span class="tok-comment">// Start of BMP Private Use Area</span>
</span>
<span class="line" id="L457"></span>
<span class="line" id="L458"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L459"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">1</span>; <span class="tok-comment">// start at second code point.</span>
</span>
<span class="line" id="L460"> <span class="tok-kw">var</span> deleted: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L461"></span>
<span class="line" id="L462"> block_check: <span class="tok-kw">while</span> (i &lt; d_list.items.len) : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L463"> <span class="tok-kw">const</span> C = d_list.items[i];</span>
<span class="line" id="L464"> <span class="tok-kw">var</span> starter_index: ?<span class="tok-type">usize</span> = <span class="tok-null">null</span>;</span>
<span class="line" id="L465"> <span class="tok-kw">var</span> j: <span class="tok-type">usize</span> = i;</span>
<span class="line" id="L466"></span>
<span class="line" id="L467"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L468"> j -= <span class="tok-number">1</span>;</span>
<span class="line" id="L469"></span>
<span class="line" id="L470"> <span class="tok-comment">// Check for starter.</span>
</span>
<span class="line" id="L471"> <span class="tok-kw">if</span> (ccc_map.combiningClass(d_list.items[j]) == <span class="tok-number">0</span>) {</span>
<span class="line" id="L472"> <span class="tok-kw">if</span> (i - j &gt; <span class="tok-number">1</span>) { <span class="tok-comment">// If there's distance between the starting point and the current position.</span>
</span>
<span class="line" id="L473"> <span class="tok-kw">for</span> (d_list.items[(j + <span class="tok-number">1</span>)..i]) |B| {</span>
<span class="line" id="L474"> <span class="tok-comment">// Check for blocking conditions.</span>
</span>
<span class="line" id="L475"> <span class="tok-kw">if</span> (isHangul(C)) {</span>
<span class="line" id="L476"> <span class="tok-kw">if</span> (isCombining(B) <span class="tok-kw">or</span> isNonHangulStarter(B)) <span class="tok-kw">continue</span> :block_check;</span>
<span class="line" id="L477"> }</span>
<span class="line" id="L478"> <span class="tok-kw">if</span> (ccc_map.combiningClass(B) &gt;= ccc_map.combiningClass(C)) <span class="tok-kw">continue</span> :block_check;</span>
<span class="line" id="L479"> }</span>
<span class="line" id="L480"> }</span>
<span class="line" id="L481"></span>
<span class="line" id="L482"> <span class="tok-comment">// Found starter at j.</span>
</span>
<span class="line" id="L483"> starter_index = j;</span>
<span class="line" id="L484"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L485"> }</span>
<span class="line" id="L486"></span>
<span class="line" id="L487"> <span class="tok-kw">if</span> (j == <span class="tok-number">0</span>) <span class="tok-kw">break</span>;</span>
<span class="line" id="L488"> }</span>
<span class="line" id="L489"></span>
<span class="line" id="L490"> <span class="tok-kw">if</span> (starter_index) |sidx| {</span>
<span class="line" id="L491"> <span class="tok-kw">const</span> L = d_list.items[sidx];</span>
<span class="line" id="L492"> <span class="tok-kw">var</span> processed_hangul = <span class="tok-null">false</span>;</span>
<span class="line" id="L493"></span>
<span class="line" id="L494"> <span class="tok-kw">if</span> (isHangul(L) <span class="tok-kw">and</span> isHangul(C)) {</span>
<span class="line" id="L495"> <span class="tok-kw">const</span> l_stype = hangul_map.syllableType(L).?;</span>
<span class="line" id="L496"> <span class="tok-kw">const</span> c_stype = hangul_map.syllableType(C).?;</span>
<span class="line" id="L497"></span>
<span class="line" id="L498"> <span class="tok-kw">if</span> (l_stype == .LV <span class="tok-kw">and</span> c_stype == .T) {</span>
<span class="line" id="L499"> <span class="tok-comment">// LV, T</span>
</span>
<span class="line" id="L500"> d_list.items[sidx] = composeHangulCanon(L, C);</span>
<span class="line" id="L501"> d_list.items[i] = tombstone; <span class="tok-comment">// Mark for deletion.</span>
</span>
<span class="line" id="L502"> processed_hangul = <span class="tok-null">true</span>;</span>
<span class="line" id="L503"> }</span>
<span class="line" id="L504"></span>
<span class="line" id="L505"> <span class="tok-kw">if</span> (l_stype == .L <span class="tok-kw">and</span> c_stype == .V) {</span>
<span class="line" id="L506"> <span class="tok-comment">// Handle L, V. L, V, T is handled via main loop.</span>
</span>
<span class="line" id="L507"> d_list.items[sidx] = composeHangulFull(L, C, <span class="tok-number">0</span>);</span>
<span class="line" id="L508"> d_list.items[i] = tombstone; <span class="tok-comment">// Mark for deletion.</span>
</span>
<span class="line" id="L509"> processed_hangul = <span class="tok-null">true</span>;</span>
<span class="line" id="L510"> }</span>
<span class="line" id="L511"></span>
<span class="line" id="L512"> <span class="tok-kw">if</span> (processed_hangul) deleted += <span class="tok-number">1</span>;</span>
<span class="line" id="L513"> }</span>
<span class="line" id="L514"></span>
<span class="line" id="L515"> <span class="tok-kw">if</span> (!processed_hangul) {</span>
<span class="line" id="L516"> <span class="tok-comment">// L -&gt; C not Hangul.</span>
</span>
<span class="line" id="L517"> <span class="tok-kw">if</span> (self.nfc_map.get(.{ L, C })) |P| {</span>
<span class="line" id="L518"> <span class="tok-kw">if</span> (!norm_props.isFcx(P)) {</span>
<span class="line" id="L519"> d_list.items[sidx] = P;</span>
<span class="line" id="L520"> d_list.items[i] = tombstone; <span class="tok-comment">// Mark for deletion.</span>
</span>
<span class="line" id="L521"> deleted += <span class="tok-number">1</span>;</span>
<span class="line" id="L522"> }</span>
<span class="line" id="L523"> }</span>
<span class="line" id="L524"> }</span>
<span class="line" id="L525"> }</span>
<span class="line" id="L526"> }</span>
<span class="line" id="L527"></span>
<span class="line" id="L528"> <span class="tok-comment">// Check if finished.</span>
</span>
<span class="line" id="L529"> <span class="tok-kw">if</span> (deleted == <span class="tok-number">0</span>) {</span>
<span class="line" id="L530"> <span class="tok-kw">var</span> cstr_list = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u8</span>).initCapacity(allocator, d_list.items.len * <span class="tok-number">4</span>);</span>
<span class="line" id="L531"> <span class="tok-kw">defer</span> cstr_list.deinit();</span>
<span class="line" id="L532"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L533"></span>
<span class="line" id="L534"> <span class="tok-kw">for</span> (d_list.items) |cp| {</span>
<span class="line" id="L535"> <span class="tok-kw">if</span> (cp == tombstone) <span class="tok-kw">continue</span>; <span class="tok-comment">// &quot;Delete&quot;</span>
</span>
<span class="line" id="L536"> <span class="tok-kw">const</span> len = <span class="tok-kw">try</span> std.unicode.utf8Encode(cp, &amp;buf);</span>
<span class="line" id="L537"> cstr_list.appendSliceAssumeCapacity(buf[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L538"> }</span>
<span class="line" id="L539"></span>
<span class="line" id="L540"> <span class="tok-kw">return</span> Result{ .allocator = allocator, .slice = <span class="tok-kw">try</span> cstr_list.toOwnedSlice() };</span>
<span class="line" id="L541"> }</span>
<span class="line" id="L542"></span>
<span class="line" id="L543"> <span class="tok-comment">// Otherwise update code points list.</span>
</span>
<span class="line" id="L544"> <span class="tok-kw">var</span> tmp_d_list = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u21</span>).initCapacity(allocator, d_list.items.len - deleted);</span>
<span class="line" id="L545"> <span class="tok-kw">defer</span> tmp_d_list.deinit();</span>
<span class="line" id="L546"></span>
<span class="line" id="L547"> <span class="tok-kw">for</span> (d_list.items) |cp| {</span>
<span class="line" id="L548"> <span class="tok-kw">if</span> (cp != tombstone) tmp_d_list.appendAssumeCapacity(cp);</span>
<span class="line" id="L549"> }</span>
<span class="line" id="L550"></span>
<span class="line" id="L551"> d_list.clearRetainingCapacity();</span>
<span class="line" id="L552"> d_list.appendSliceAssumeCapacity(tmp_d_list.items);</span>
<span class="line" id="L553"> }</span>
<span class="line" id="L554">}</span>
<span class="line" id="L555"></span>
<span class="line" id="L556"><span class="tok-kw">test</span> <span class="tok-str">&quot;nfc&quot;</span> {</span>
<span class="line" id="L557"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L558"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L559"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L560"></span>
<span class="line" id="L561"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> n.nfc(allocator, <span class="tok-str">&quot;Complex char: \u{3D2}\u{301}&quot;</span>);</span>
<span class="line" id="L562"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L563"></span>
<span class="line" id="L564"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;Complex char: \u{3D3}&quot;</span>, result.slice);</span>
<span class="line" id="L565">}</span>
<span class="line" id="L566"></span>
<span class="line" id="L567"><span class="tok-kw">test</span> <span class="tok-str">&quot;nfkc&quot;</span> {</span>
<span class="line" id="L568"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L569"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L570"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L571"></span>
<span class="line" id="L572"> <span class="tok-kw">var</span> result = <span class="tok-kw">try</span> n.nfkc(allocator, <span class="tok-str">&quot;Complex char: \u{03A5}\u{0301}&quot;</span>);</span>
<span class="line" id="L573"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L574"></span>
<span class="line" id="L575"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;Complex char: \u{038E}&quot;</span>, result.slice);</span>
<span class="line" id="L576">}</span>
<span class="line" id="L577"></span>
<span class="line" id="L578"><span class="tok-comment">/// Tests for equality as per Unicode rules for Identifiers.</span></span>
<span class="line" id="L579"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eqlIdentifiers</span>(allocator: std.mem.Allocator, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">bool</span> {</span>
<span class="line" id="L580"> <span class="tok-kw">var</span> list_a = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u21</span>).initCapacity(allocator, a.len);</span>
<span class="line" id="L581"> <span class="tok-kw">defer</span> list_a.deinit();</span>
<span class="line" id="L582"> <span class="tok-kw">var</span> list_b = <span class="tok-kw">try</span> std.ArrayList(<span class="tok-type">u21</span>).initCapacity(allocator, b.len);</span>
<span class="line" id="L583"> <span class="tok-kw">defer</span> list_b.deinit();</span>
<span class="line" id="L584"></span>
<span class="line" id="L585"> <span class="tok-kw">const</span> Item = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L586"> str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L587"> list: *std.ArrayList(<span class="tok-type">u21</span>),</span>
<span class="line" id="L588"> };</span>
<span class="line" id="L589"></span>
<span class="line" id="L590"> <span class="tok-kw">const</span> items = [_]Item{</span>
<span class="line" id="L591"> .{ .str = a, .list = &amp;list_a },</span>
<span class="line" id="L592"> .{ .str = b, .list = &amp;list_b },</span>
<span class="line" id="L593"> };</span>
<span class="line" id="L594"></span>
<span class="line" id="L595"> <span class="tok-kw">for</span> (items) |item| {</span>
<span class="line" id="L596"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = item.str };</span>
<span class="line" id="L597"> <span class="tok-kw">while</span> (cp_iter.next()) |cp| {</span>
<span class="line" id="L598"> <span class="tok-kw">if</span> (norm_props.toNfkcCaseFold(cp.code)) |nfkcf| {</span>
<span class="line" id="L599"> <span class="tok-kw">for</span> (nfkcf) |c| {</span>
<span class="line" id="L600"> <span class="tok-kw">if</span> (c == <span class="tok-number">0</span>) <span class="tok-kw">break</span>;</span>
<span class="line" id="L601"> item.list.appendAssumeCapacity(c);</span>
<span class="line" id="L602"> }</span>
<span class="line" id="L603"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L604"> item.list.appendAssumeCapacity(cp.code); <span class="tok-comment">// maps to itself</span>
</span>
<span class="line" id="L605"> }</span>
<span class="line" id="L606"> }</span>
<span class="line" id="L607"> }</span>
<span class="line" id="L608"></span>
<span class="line" id="L609"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u21</span>, list_a.items, list_b.items);</span>
<span class="line" id="L610">}</span>
<span class="line" id="L611"></span>
<span class="line" id="L612"><span class="tok-kw">test</span> <span class="tok-str">&quot;eqlIdentifiers&quot;</span> {</span>
<span class="line" id="L613"> <span class="tok-kw">try</span> std.testing.expect(<span class="tok-kw">try</span> eqlIdentifiers(std.testing.allocator, <span class="tok-str">&quot;Foé&quot;</span>, <span class="tok-str">&quot;foé&quot;</span>));</span>
<span class="line" id="L614">}</span>
<span class="line" id="L615"></span>
<span class="line" id="L616"><span class="tok-comment">/// Tests for equality of `a` and `b` after normalizing to NFD.</span></span>
<span class="line" id="L617"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eql</span>(self: Self, allocator: std.mem.Allocator, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">bool</span> {</span>
<span class="line" id="L618"> <span class="tok-kw">var</span> norm_result_a = <span class="tok-kw">try</span> self.nfd(allocator, a);</span>
<span class="line" id="L619"> <span class="tok-kw">defer</span> norm_result_a.deinit();</span>
<span class="line" id="L620"> <span class="tok-kw">var</span> norm_result_b = <span class="tok-kw">try</span> self.nfd(allocator, b);</span>
<span class="line" id="L621"> <span class="tok-kw">defer</span> norm_result_b.deinit();</span>
<span class="line" id="L622"></span>
<span class="line" id="L623"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, norm_result_a.slice, norm_result_b.slice);</span>
<span class="line" id="L624">}</span>
<span class="line" id="L625"></span>
<span class="line" id="L626"><span class="tok-kw">test</span> <span class="tok-str">&quot;eql&quot;</span> {</span>
<span class="line" id="L627"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L628"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L629"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L630"></span>
<span class="line" id="L631"> <span class="tok-kw">try</span> std.testing.expect(<span class="tok-kw">try</span> n.eql(allocator, <span class="tok-str">&quot;foé&quot;</span>, <span class="tok-str">&quot;foe\u{0301}&quot;</span>));</span>
<span class="line" id="L632"> <span class="tok-kw">try</span> std.testing.expect(<span class="tok-kw">try</span> n.eql(allocator, <span class="tok-str">&quot;foϓ&quot;</span>, <span class="tok-str">&quot;fo\u{03D2}\u{0301}&quot;</span>));</span>
<span class="line" id="L633">}</span>
<span class="line" id="L634"></span>
<span class="line" id="L635"><span class="tok-kw">fn</span> <span class="tok-fn">requiresNfdBeforeCaseFold</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L636"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (cp) {</span>
<span class="line" id="L637"> <span class="tok-number">0x0345</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L638"> <span class="tok-number">0x1F80</span>...<span class="tok-number">0x1FAF</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L639"> <span class="tok-number">0x1FB2</span>...<span class="tok-number">0x1FB4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L640"> <span class="tok-number">0x1FB7</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L641"> <span class="tok-number">0x1FBC</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L642"> <span class="tok-number">0x1FC2</span>...<span class="tok-number">0x1FC4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L643"> <span class="tok-number">0x1FC7</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L644"> <span class="tok-number">0x1FCC</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L645"> <span class="tok-number">0x1FF2</span>...<span class="tok-number">0x1FF4</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L646"> <span class="tok-number">0x1FF7</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L647"> <span class="tok-number">0x1FFC</span> =&gt; <span class="tok-null">true</span>,</span>
<span class="line" id="L648"> <span class="tok-kw">else</span> =&gt; <span class="tok-null">false</span>,</span>
<span class="line" id="L649"> };</span>
<span class="line" id="L650">}</span>
<span class="line" id="L651"></span>
<span class="line" id="L652"><span class="tok-kw">fn</span> <span class="tok-fn">requiresPreNfd</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L653"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L654"></span>
<span class="line" id="L655"> <span class="tok-kw">return</span> <span class="tok-kw">while</span> (cp_iter.next()) |cp| {</span>
<span class="line" id="L656"> <span class="tok-kw">if</span> (requiresNfdBeforeCaseFold(cp.code)) <span class="tok-kw">break</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L657"> } <span class="tok-kw">else</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L658">}</span>
<span class="line" id="L659"></span>
<span class="line" id="L660"><span class="tok-comment">/// `eqlCaseless` tests for equality of `a` and `b` after normalizing to NFD and ignoring letter case.</span></span>
<span class="line" id="L661"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eqlCaseless</span>(self: Self, allocator: std.mem.Allocator, a: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, b: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !<span class="tok-type">bool</span> {</span>
<span class="line" id="L662"> <span class="tok-comment">// The long winding road of normalized caseless matching...</span>
</span>
<span class="line" id="L663"> <span class="tok-comment">// NFD(CaseFold(NFD(str))) or NFD(CaseFold(str))</span>
</span>
<span class="line" id="L664"> <span class="tok-kw">var</span> norm_result_a: Result = Result{ .slice = a };</span>
<span class="line" id="L665"> <span class="tok-kw">if</span> (requiresPreNfd(a)) {</span>
<span class="line" id="L666"> <span class="tok-kw">if</span> (!self.isFcd(a)) {</span>
<span class="line" id="L667"> norm_result_a = <span class="tok-kw">try</span> self.nfd(allocator, a);</span>
<span class="line" id="L668"> }</span>
<span class="line" id="L669"> }</span>
<span class="line" id="L670"> <span class="tok-kw">defer</span> norm_result_a.deinit();</span>
<span class="line" id="L671"></span>
<span class="line" id="L672"> <span class="tok-kw">const</span> cf_a = <span class="tok-kw">try</span> case_fold_map.caseFoldStr(allocator, norm_result_a.slice);</span>
<span class="line" id="L673"> <span class="tok-kw">defer</span> allocator.free(cf_a);</span>
<span class="line" id="L674"> norm_result_a.deinit();</span>
<span class="line" id="L675"> norm_result_a = <span class="tok-kw">try</span> self.nfd(allocator, cf_a);</span>
<span class="line" id="L676"></span>
<span class="line" id="L677"> <span class="tok-kw">var</span> norm_result_b: Result = Result{ .slice = b };</span>
<span class="line" id="L678"> <span class="tok-kw">if</span> (requiresPreNfd(b)) {</span>
<span class="line" id="L679"> <span class="tok-kw">if</span> (!self.isFcd(b)) {</span>
<span class="line" id="L680"> norm_result_b = <span class="tok-kw">try</span> self.nfd(allocator, b);</span>
<span class="line" id="L681"> }</span>
<span class="line" id="L682"> }</span>
<span class="line" id="L683"> <span class="tok-kw">defer</span> norm_result_b.deinit();</span>
<span class="line" id="L684"></span>
<span class="line" id="L685"> <span class="tok-kw">const</span> cf_b = <span class="tok-kw">try</span> case_fold_map.caseFoldStr(allocator, norm_result_b.slice);</span>
<span class="line" id="L686"> <span class="tok-kw">defer</span> allocator.free(cf_b);</span>
<span class="line" id="L687"> norm_result_b.deinit();</span>
<span class="line" id="L688"> norm_result_b = <span class="tok-kw">try</span> self.nfd(allocator, cf_b);</span>
<span class="line" id="L689"></span>
<span class="line" id="L690"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, norm_result_a.slice, norm_result_b.slice);</span>
<span class="line" id="L691">}</span>
<span class="line" id="L692"></span>
<span class="line" id="L693"><span class="tok-kw">test</span> <span class="tok-str">&quot;eqlCaseless&quot;</span> {</span>
<span class="line" id="L694"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L695"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L696"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L697"></span>
<span class="line" id="L698"> <span class="tok-kw">try</span> std.testing.expect(<span class="tok-kw">try</span> n.eqlCaseless(allocator, <span class="tok-str">&quot;Foϓ&quot;</span>, <span class="tok-str">&quot;fo\u{03D2}\u{0301}&quot;</span>));</span>
<span class="line" id="L699"> <span class="tok-kw">try</span> std.testing.expect(<span class="tok-kw">try</span> n.eqlCaseless(allocator, <span class="tok-str">&quot;FOÉ&quot;</span>, <span class="tok-str">&quot;foe\u{0301}&quot;</span>)); <span class="tok-comment">// foÉ == foé</span>
</span>
<span class="line" id="L700">}</span>
<span class="line" id="L701"></span>
<span class="line" id="L702"><span class="tok-comment">// FCD</span>
</span>
<span class="line" id="L703"><span class="tok-kw">fn</span> <span class="tok-fn">getLeadCcc</span>(self: Self, cp: <span class="tok-type">u21</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L704"> <span class="tok-kw">const</span> dc = self.mapping(cp, .nfd);</span>
<span class="line" id="L705"> <span class="tok-kw">return</span> ccc_map.combiningClass(dc.cps[<span class="tok-number">0</span>]);</span>
<span class="line" id="L706">}</span>
<span class="line" id="L707"></span>
<span class="line" id="L708"><span class="tok-kw">fn</span> <span class="tok-fn">getTrailCcc</span>(self: Self, cp: <span class="tok-type">u21</span>) <span class="tok-type">u8</span> {</span>
<span class="line" id="L709"> <span class="tok-kw">const</span> dc = self.mapping(cp, .nfd);</span>
<span class="line" id="L710"> <span class="tok-kw">const</span> len = <span class="tok-kw">for</span> (dc.cps, <span class="tok-number">0</span>..) |dcp, i| {</span>
<span class="line" id="L711"> <span class="tok-kw">if</span> (dcp == <span class="tok-number">0</span>) <span class="tok-kw">break</span> i;</span>
<span class="line" id="L712"> } <span class="tok-kw">else</span> dc.cps.len;</span>
<span class="line" id="L713"> <span class="tok-kw">return</span> ccc_map.combiningClass(dc.cps[len -| <span class="tok-number">1</span>]);</span>
<span class="line" id="L714">}</span>
<span class="line" id="L715"></span>
<span class="line" id="L716"><span class="tok-comment">/// Fast check to detect if a string is already in NFC or NFD form.</span></span>
<span class="line" id="L717"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isFcd</span>(self: Self, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L718"> <span class="tok-kw">var</span> prev_ccc: <span class="tok-type">u8</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L719"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L720"></span>
<span class="line" id="L721"> <span class="tok-kw">return</span> <span class="tok-kw">while</span> (cp_iter.next()) |cp| {</span>
<span class="line" id="L722"> <span class="tok-kw">const</span> ccc = self.getLeadCcc(cp.code);</span>
<span class="line" id="L723"> <span class="tok-kw">if</span> (ccc != <span class="tok-number">0</span> <span class="tok-kw">and</span> ccc &lt; prev_ccc) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L724"> prev_ccc = self.getTrailCcc(cp.code);</span>
<span class="line" id="L725"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L726">}</span>
<span class="line" id="L727"></span>
<span class="line" id="L728"><span class="tok-kw">test</span> <span class="tok-str">&quot;isFcd&quot;</span> {</span>
<span class="line" id="L729"> <span class="tok-kw">const</span> allocator = std.testing.allocator;</span>
<span class="line" id="L730"> <span class="tok-kw">var</span> n = <span class="tok-kw">try</span> init(allocator);</span>
<span class="line" id="L731"> <span class="tok-kw">defer</span> n.deinit();</span>
<span class="line" id="L732"></span>
<span class="line" id="L733"> <span class="tok-kw">const</span> is_nfc = <span class="tok-str">&quot;José \u{3D3}&quot;</span>;</span>
<span class="line" id="L734"> <span class="tok-kw">try</span> std.testing.expect(n.isFcd(is_nfc));</span>
<span class="line" id="L735"></span>
<span class="line" id="L736"> <span class="tok-kw">const</span> is_nfd = <span class="tok-str">&quot;Jose\u{301} \u{3d2}\u{301}&quot;</span>;</span>
<span class="line" id="L737"> <span class="tok-kw">try</span> std.testing.expect(n.isFcd(is_nfd));</span>
<span class="line" id="L738"></span>
<span class="line" id="L739"> <span class="tok-kw">const</span> not_fcd = <span class="tok-str">&quot;Jose\u{301} \u{3d2}\u{315}\u{301}&quot;</span>;</span>
<span class="line" id="L740"> <span class="tok-kw">try</span> std.testing.expect(!n.isFcd(not_fcd));</span>
<span class="line" id="L741">}</span>
<span class="line" id="L742"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `CodePoint` represents a Unicode code point by its code, length, and offset in the source bytes.</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"></span>
<span class="line" id="L5">code: <span class="tok-type">u21</span>,</span>
<span class="line" id="L6">len: <span class="tok-type">u3</span>,</span>
<span class="line" id="L7">offset: <span class="tok-type">usize</span>,</span>
<span class="line" id="L8"></span>
<span class="line" id="L9"><span class="tok-kw">const</span> CodePoint = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-comment">/// `CodePointIterator` iterates a string one `CodePoint` at-a-time.</span></span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CodePointIterator = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L13"> bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L14"> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">next</span>(self: *CodePointIterator) ?CodePoint {</span>
<span class="line" id="L17"> <span class="tok-kw">if</span> (self.i &gt;= self.bytes.len) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L18"></span>
<span class="line" id="L19"> <span class="tok-kw">if</span> (self.bytes[self.i] &lt; <span class="tok-number">128</span>) {</span>
<span class="line" id="L20"> <span class="tok-comment">// ASCII fast path</span>
</span>
<span class="line" id="L21"> <span class="tok-kw">const</span> cp = CodePoint{</span>
<span class="line" id="L22"> .code = self.bytes[self.i],</span>
<span class="line" id="L23"> .len = <span class="tok-number">1</span>,</span>
<span class="line" id="L24"> .offset = self.i,</span>
<span class="line" id="L25"> };</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"> self.i += <span class="tok-number">1</span>;</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"> <span class="tok-kw">return</span> cp;</span>
<span class="line" id="L30"> }</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"> <span class="tok-kw">var</span> cp = CodePoint{</span>
<span class="line" id="L33"> .code = <span class="tok-null">undefined</span>,</span>
<span class="line" id="L34"> .len = blk: {</span>
<span class="line" id="L35"> <span class="tok-kw">break</span> :blk <span class="tok-kw">switch</span> (self.bytes[self.i]) {</span>
<span class="line" id="L36"> <span class="tok-number">0b0000_0000</span>...<span class="tok-number">0b0111_1111</span> =&gt; <span class="tok-number">1</span>,</span>
<span class="line" id="L37"> <span class="tok-number">0b1100_0000</span>...<span class="tok-number">0b1101_1111</span> =&gt; <span class="tok-number">2</span>,</span>
<span class="line" id="L38"> <span class="tok-number">0b1110_0000</span>...<span class="tok-number">0b1110_1111</span> =&gt; <span class="tok-number">3</span>,</span>
<span class="line" id="L39"> <span class="tok-number">0b1111_0000</span>...<span class="tok-number">0b1111_0111</span> =&gt; <span class="tok-number">4</span>,</span>
<span class="line" id="L40"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L41"> };</span>
<span class="line" id="L42"> },</span>
<span class="line" id="L43"> .offset = self.i,</span>
<span class="line" id="L44"> };</span>
<span class="line" id="L45"></span>
<span class="line" id="L46"> self.i += cp.len;</span>
<span class="line" id="L47"> <span class="tok-kw">const</span> cp_bytes = self.bytes[self.i - cp.len .. self.i];</span>
<span class="line" id="L48"></span>
<span class="line" id="L49"> cp.code = <span class="tok-kw">switch</span> (cp.len) {</span>
<span class="line" id="L50"> <span class="tok-number">2</span> =&gt; (<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, (cp_bytes[<span class="tok-number">0</span>] &amp; <span class="tok-number">0b00011111</span>)) &lt;&lt; <span class="tok-number">6</span>) | (cp_bytes[<span class="tok-number">1</span>] &amp; <span class="tok-number">0b00111111</span>),</span>
<span class="line" id="L51"></span>
<span class="line" id="L52"> <span class="tok-number">3</span> =&gt; (((<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, (cp_bytes[<span class="tok-number">0</span>] &amp; <span class="tok-number">0b00001111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L53"> (cp_bytes[<span class="tok-number">1</span>] &amp; <span class="tok-number">0b00111111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L54"> (cp_bytes[<span class="tok-number">2</span>] &amp; <span class="tok-number">0b00111111</span>),</span>
<span class="line" id="L55"></span>
<span class="line" id="L56"> <span class="tok-number">4</span> =&gt; (((((<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, (cp_bytes[<span class="tok-number">0</span>] &amp; <span class="tok-number">0b00000111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L57"> (cp_bytes[<span class="tok-number">1</span>] &amp; <span class="tok-number">0b00111111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L58"> (cp_bytes[<span class="tok-number">2</span>] &amp; <span class="tok-number">0b00111111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L59"> (cp_bytes[<span class="tok-number">3</span>] &amp; <span class="tok-number">0b00111111</span>),</span>
<span class="line" id="L60"></span>
<span class="line" id="L61"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L62"> };</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> <span class="tok-kw">return</span> cp;</span>
<span class="line" id="L65"> }</span>
<span class="line" id="L66"></span>
<span class="line" id="L67"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">peek</span>(self: *CodePointIterator) ?CodePoint {</span>
<span class="line" id="L68"> <span class="tok-kw">const</span> saved_i = self.i;</span>
<span class="line" id="L69"> <span class="tok-kw">defer</span> self.i = saved_i;</span>
<span class="line" id="L70"> <span class="tok-kw">return</span> self.next();</span>
<span class="line" id="L71"> }</span>
<span class="line" id="L72">};</span>
<span class="line" id="L73"></span>
<span class="line" id="L74"><span class="tok-kw">test</span> <span class="tok-str">&quot;CodePointIterator peek&quot;</span> {</span>
<span class="line" id="L75"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = <span class="tok-str">&quot;Hi&quot;</span> };</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'H'</span>), iter.next().?.code);</span>
<span class="line" id="L78"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'i'</span>), iter.peek().?.code);</span>
<span class="line" id="L79"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'i'</span>), iter.next().?.code);</span>
<span class="line" id="L80"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(?CodePoint, <span class="tok-null">null</span>), iter.peek());</span>
<span class="line" id="L81"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(?CodePoint, <span class="tok-null">null</span>), iter.next());</span>
<span class="line" id="L82">}</span>
<span class="line" id="L83"></span>
<span class="line" id="L84"><span class="tok-comment">/// `readCodePoint` returns the next code point code as a `u21` in the given reader, or null at end-of-input.</span></span>
<span class="line" id="L85"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">readCodePoint</span>(reader: <span class="tok-kw">anytype</span>) !?<span class="tok-type">u21</span> {</span>
<span class="line" id="L86"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L87"></span>
<span class="line" id="L88"> buf[<span class="tok-number">0</span>] = reader.readByte() <span class="tok-kw">catch</span> |err| <span class="tok-kw">switch</span> (err) {</span>
<span class="line" id="L89"> <span class="tok-kw">error</span>.EndOfStream =&gt; <span class="tok-kw">return</span> <span class="tok-null">null</span>,</span>
<span class="line" id="L90"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> err,</span>
<span class="line" id="L91"> };</span>
<span class="line" id="L92"></span>
<span class="line" id="L93"> <span class="tok-kw">if</span> (buf[<span class="tok-number">0</span>] &lt; <span class="tok-number">128</span>) <span class="tok-kw">return</span> <span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, buf[<span class="tok-number">0</span>]);</span>
<span class="line" id="L94"></span>
<span class="line" id="L95"> <span class="tok-kw">const</span> len: <span class="tok-type">u3</span> = <span class="tok-kw">switch</span> (buf[<span class="tok-number">0</span>]) {</span>
<span class="line" id="L96"> <span class="tok-number">0b1100_0000</span>...<span class="tok-number">0b1101_1111</span> =&gt; <span class="tok-number">2</span>,</span>
<span class="line" id="L97"> <span class="tok-number">0b1110_0000</span>...<span class="tok-number">0b1110_1111</span> =&gt; <span class="tok-number">3</span>,</span>
<span class="line" id="L98"> <span class="tok-number">0b1111_0000</span>...<span class="tok-number">0b1111_0111</span> =&gt; <span class="tok-number">4</span>,</span>
<span class="line" id="L99"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidUtf8,</span>
<span class="line" id="L100"> };</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">const</span> read = <span class="tok-kw">try</span> reader.read(buf[<span class="tok-number">1</span>..len]);</span>
<span class="line" id="L103"></span>
<span class="line" id="L104"> <span class="tok-kw">if</span> (read &lt; len - <span class="tok-number">1</span>) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidUtf8;</span>
<span class="line" id="L105"></span>
<span class="line" id="L106"> <span class="tok-kw">return</span> <span class="tok-kw">switch</span> (len) {</span>
<span class="line" id="L107"> <span class="tok-number">2</span> =&gt; (<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, (buf[<span class="tok-number">0</span>] &amp; <span class="tok-number">0b00011111</span>)) &lt;&lt; <span class="tok-number">6</span>) | (buf[<span class="tok-number">1</span>] &amp; <span class="tok-number">0b00111111</span>),</span>
<span class="line" id="L108"></span>
<span class="line" id="L109"> <span class="tok-number">3</span> =&gt; (((<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, (buf[<span class="tok-number">0</span>] &amp; <span class="tok-number">0b00001111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L110"> (buf[<span class="tok-number">1</span>] &amp; <span class="tok-number">0b00111111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L111"> (buf[<span class="tok-number">2</span>] &amp; <span class="tok-number">0b00111111</span>),</span>
<span class="line" id="L112"></span>
<span class="line" id="L113"> <span class="tok-number">4</span> =&gt; (((((<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, (buf[<span class="tok-number">0</span>] &amp; <span class="tok-number">0b00000111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L114"> (buf[<span class="tok-number">1</span>] &amp; <span class="tok-number">0b00111111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L115"> (buf[<span class="tok-number">2</span>] &amp; <span class="tok-number">0b00111111</span>)) &lt;&lt; <span class="tok-number">6</span>) |</span>
<span class="line" id="L116"> (buf[<span class="tok-number">3</span>] &amp; <span class="tok-number">0b00111111</span>),</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"> <span class="tok-kw">else</span> =&gt; <span class="tok-kw">unreachable</span>,</span>
<span class="line" id="L119"> };</span>
<span class="line" id="L120">}</span>
<span class="line" id="L121"></span>
<span class="line" id="L122"><span class="tok-kw">test</span> <span class="tok-str">&quot;readCodePoint&quot;</span> {</span>
<span class="line" id="L123"> <span class="tok-kw">var</span> buf = <span class="tok-str">&quot;abé😹&quot;</span>.*;</span>
<span class="line" id="L124"> <span class="tok-kw">var</span> fis = std.io.fixedBufferStream(&amp;buf);</span>
<span class="line" id="L125"> <span class="tok-kw">const</span> reader = fis.reader();</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'a'</span>), (<span class="tok-kw">try</span> readCodePoint(reader)).?);</span>
<span class="line" id="L128"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'b'</span>), (<span class="tok-kw">try</span> readCodePoint(reader)).?);</span>
<span class="line" id="L129"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'é'</span>), (<span class="tok-kw">try</span> readCodePoint(reader)).?);</span>
<span class="line" id="L130"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">u21</span>, <span class="tok-str">'😹'</span>), (<span class="tok-kw">try</span> readCodePoint(reader)).?);</span>
<span class="line" id="L131"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(?<span class="tok-type">u21</span>, <span class="tok-null">null</span>), <span class="tok-kw">try</span> readCodePoint(reader));</span>
<span class="line" id="L132">}</span>
<span class="line" id="L133"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `Grapheme` represents a Unicode grapheme cluster by its length and offset in the source bytes.</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> unicode = std.unicode;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> CodePoint = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;CodePoint.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> CodePointIterator = CodePoint.CodePointIterator;</span>
<span class="line" id="L8"><span class="tok-kw">const</span> readCodePoint = CodePoint.readCodePoint;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> emoji = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/emoji_data.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">const</span> gbp = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/grapheme_break_property.zig&quot;</span>);</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Grapheme = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L13"></span>
<span class="line" id="L14">len: <span class="tok-type">usize</span>,</span>
<span class="line" id="L15">offset: <span class="tok-type">usize</span>,</span>
<span class="line" id="L16"></span>
<span class="line" id="L17"><span class="tok-comment">/// `eql` comparse `str` with the bytes of this grapheme cluster in `src` for equality.</span></span>
<span class="line" id="L18"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eql</span>(self: Grapheme, src: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, other: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L19"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, src[self.offset .. self.offset + self.len], other);</span>
<span class="line" id="L20">}</span>
<span class="line" id="L21"></span>
<span class="line" id="L22"><span class="tok-comment">/// `slice` returns the bytes that correspond to this grapheme cluster in `src`.</span></span>
<span class="line" id="L23"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">slice</span>(self: Grapheme, src: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) []<span class="tok-kw">const</span> <span class="tok-type">u8</span> {</span>
<span class="line" id="L24"> <span class="tok-kw">return</span> src[self.offset .. self.offset + self.len];</span>
<span class="line" id="L25">}</span>
<span class="line" id="L26"></span>
<span class="line" id="L27"><span class="tok-comment">/// `GraphemeIterator` iterates a sting of UTF-8 encoded bytes one grapheme cluster at-a-time.</span></span>
<span class="line" id="L28"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> GraphemeIterator = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L29"> buf: [<span class="tok-number">2</span>]?CodePoint = [_]?CodePoint{ <span class="tok-null">null</span>, <span class="tok-null">null</span> },</span>
<span class="line" id="L30"> cp_iter: CodePointIterator,</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L33"></span>
<span class="line" id="L34"> <span class="tok-comment">/// Assumes `src` is valid UTF-8.</span></span>
<span class="line" id="L35"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) Self {</span>
<span class="line" id="L36"> <span class="tok-kw">var</span> self = Self{ .cp_iter = CodePointIterator{ .bytes = str } };</span>
<span class="line" id="L37"> self.buf[<span class="tok-number">1</span>] = self.cp_iter.next();</span>
<span class="line" id="L38"></span>
<span class="line" id="L39"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L40"> }</span>
<span class="line" id="L41"></span>
<span class="line" id="L42"> <span class="tok-kw">fn</span> <span class="tok-fn">advance</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L43"> self.buf[<span class="tok-number">0</span>] = self.buf[<span class="tok-number">1</span>];</span>
<span class="line" id="L44"> self.buf[<span class="tok-number">1</span>] = self.cp_iter.next();</span>
<span class="line" id="L45"> }</span>
<span class="line" id="L46"></span>
<span class="line" id="L47"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">next</span>(self: *Self) ?Grapheme {</span>
<span class="line" id="L48"> self.advance();</span>
<span class="line" id="L49"></span>
<span class="line" id="L50"> <span class="tok-comment">// If at end</span>
</span>
<span class="line" id="L51"> <span class="tok-kw">if</span> (self.buf[<span class="tok-number">0</span>] == <span class="tok-null">null</span>) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L52"> <span class="tok-kw">if</span> (self.buf[<span class="tok-number">1</span>] == <span class="tok-null">null</span>) <span class="tok-kw">return</span> Grapheme{ .len = self.buf[<span class="tok-number">0</span>].?.len, .offset = self.buf[<span class="tok-number">0</span>].?.offset };</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-kw">const</span> gc_start = self.buf[<span class="tok-number">0</span>].?.offset;</span>
<span class="line" id="L55"> <span class="tok-kw">var</span> gc_len: <span class="tok-type">usize</span> = self.buf[<span class="tok-number">0</span>].?.len;</span>
<span class="line" id="L56"> <span class="tok-kw">var</span> state: <span class="tok-type">u3</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"> <span class="tok-kw">if</span> (graphemeBreak(</span>
<span class="line" id="L59"> self.buf[<span class="tok-number">0</span>].?.code,</span>
<span class="line" id="L60"> self.buf[<span class="tok-number">1</span>].?.code,</span>
<span class="line" id="L61"> &amp;state,</span>
<span class="line" id="L62"> )) <span class="tok-kw">return</span> Grapheme{ .len = gc_len, .offset = gc_start };</span>
<span class="line" id="L63"></span>
<span class="line" id="L64"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L65"> self.advance();</span>
<span class="line" id="L66"> <span class="tok-kw">if</span> (self.buf[<span class="tok-number">0</span>] == <span class="tok-null">null</span>) <span class="tok-kw">break</span>;</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"> gc_len += self.buf[<span class="tok-number">0</span>].?.len;</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"> <span class="tok-kw">if</span> (graphemeBreak(</span>
<span class="line" id="L71"> self.buf[<span class="tok-number">0</span>].?.code,</span>
<span class="line" id="L72"> <span class="tok-kw">if</span> (self.buf[<span class="tok-number">1</span>]) |ncp| ncp.code <span class="tok-kw">else</span> <span class="tok-number">0</span>,</span>
<span class="line" id="L73"> &amp;state,</span>
<span class="line" id="L74"> )) <span class="tok-kw">break</span>;</span>
<span class="line" id="L75"> }</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-kw">return</span> Grapheme{ .len = gc_len, .offset = gc_start };</span>
<span class="line" id="L78"> }</span>
<span class="line" id="L79">};</span>
<span class="line" id="L80"></span>
<span class="line" id="L81"><span class="tok-comment">/// `StreamingGraphemeIterator` iterates a `std.io.Reader` one grapheme cluster at-a-time.</span></span>
<span class="line" id="L82"><span class="tok-comment">/// Note that, given the steaming context, each grapheme cluster is returned as a slice of bytes.</span></span>
<span class="line" id="L83"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">StreamingGraphemeIterator</span>(<span class="tok-kw">comptime</span> T: <span class="tok-type">type</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L84"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L85"> allocator: std.mem.Allocator,</span>
<span class="line" id="L86"> buf: [<span class="tok-number">2</span>]?<span class="tok-type">u21</span> = [_]?<span class="tok-type">u21</span>{ <span class="tok-null">null</span>, <span class="tok-null">null</span> },</span>
<span class="line" id="L87"> reader: T,</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L90"></span>
<span class="line" id="L91"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: std.mem.Allocator, reader: <span class="tok-kw">anytype</span>) !Self {</span>
<span class="line" id="L92"> <span class="tok-kw">var</span> self = Self{ .allocator = allocator, .reader = reader };</span>
<span class="line" id="L93"> self.buf[<span class="tok-number">1</span>] = <span class="tok-kw">try</span> readCodePoint(self.reader);</span>
<span class="line" id="L94"></span>
<span class="line" id="L95"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L96"> }</span>
<span class="line" id="L97"></span>
<span class="line" id="L98"> <span class="tok-comment">/// Caller must free returned bytes with `allocator` passed to `init`.</span></span>
<span class="line" id="L99"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">next</span>(self: *Self) !?[]<span class="tok-type">u8</span> {</span>
<span class="line" id="L100"> <span class="tok-kw">const</span> code = (<span class="tok-kw">try</span> self.advance()) <span class="tok-kw">orelse</span> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L101"></span>
<span class="line" id="L102"> <span class="tok-kw">var</span> all_bytes = std.ArrayList(<span class="tok-type">u8</span>).init(self.allocator);</span>
<span class="line" id="L103"> <span class="tok-kw">errdefer</span> all_bytes.deinit();</span>
<span class="line" id="L104"></span>
<span class="line" id="L105"> <span class="tok-kw">try</span> encode_and_append(code, &amp;all_bytes);</span>
<span class="line" id="L106"></span>
<span class="line" id="L107"> <span class="tok-comment">// If at end</span>
</span>
<span class="line" id="L108"> <span class="tok-kw">if</span> (self.buf[<span class="tok-number">1</span>] == <span class="tok-null">null</span>) <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L109"></span>
<span class="line" id="L110"> <span class="tok-comment">// Instant breakers</span>
</span>
<span class="line" id="L111"> <span class="tok-comment">// CR</span>
</span>
<span class="line" id="L112"> <span class="tok-kw">if</span> (code == <span class="tok-str">'\x0d'</span>) {</span>
<span class="line" id="L113"> <span class="tok-kw">if</span> (self.buf[<span class="tok-number">1</span>].? == <span class="tok-str">'\x0a'</span>) {</span>
<span class="line" id="L114"> <span class="tok-comment">// CRLF</span>
</span>
<span class="line" id="L115"> <span class="tok-kw">try</span> encode_and_append(self.buf[<span class="tok-number">1</span>].?, &amp;all_bytes);</span>
<span class="line" id="L116"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L117"> }</span>
<span class="line" id="L118"></span>
<span class="line" id="L119"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L120"> }</span>
<span class="line" id="L121"> <span class="tok-comment">// LF</span>
</span>
<span class="line" id="L122"> <span class="tok-kw">if</span> (code == <span class="tok-str">'\x0a'</span>) <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L123"> <span class="tok-comment">// Control</span>
</span>
<span class="line" id="L124"> <span class="tok-kw">if</span> (gbp.isControl(code)) <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L125"></span>
<span class="line" id="L126"> <span class="tok-comment">// Common chars</span>
</span>
<span class="line" id="L127"> <span class="tok-kw">if</span> (code &lt; <span class="tok-number">0xa9</span>) {</span>
<span class="line" id="L128"> <span class="tok-comment">// Extend / ignorables loop</span>
</span>
<span class="line" id="L129"> <span class="tok-kw">while</span> (self.buf[<span class="tok-number">1</span>]) |next_cp| {</span>
<span class="line" id="L130"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x300</span> <span class="tok-kw">and</span> isIgnorable(next_cp)) {</span>
<span class="line" id="L131"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L132"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L133"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L134"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L135"> }</span>
<span class="line" id="L136"> }</span>
<span class="line" id="L137"></span>
<span class="line" id="L138"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L139"> }</span>
<span class="line" id="L140"></span>
<span class="line" id="L141"> <span class="tok-kw">if</span> (emoji.isExtendedPictographic(code)) {</span>
<span class="line" id="L142"> <span class="tok-kw">var</span> after_zwj = <span class="tok-null">false</span>;</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> <span class="tok-comment">// Extend / ignorables loop</span>
</span>
<span class="line" id="L145"> <span class="tok-kw">while</span> (self.buf[<span class="tok-number">1</span>]) |next_cp| {</span>
<span class="line" id="L146"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x300</span> <span class="tok-kw">and</span></span>
<span class="line" id="L147"> after_zwj <span class="tok-kw">and</span></span>
<span class="line" id="L148"> emoji.isExtendedPictographic(next_cp))</span>
<span class="line" id="L149"> {</span>
<span class="line" id="L150"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L151"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L152"> after_zwj = <span class="tok-null">false</span>;</span>
<span class="line" id="L153"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x300</span> <span class="tok-kw">and</span> isIgnorable(next_cp)) {</span>
<span class="line" id="L154"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L155"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L156"> <span class="tok-kw">if</span> (next_cp == <span class="tok-str">'\u{200d}'</span>) after_zwj = <span class="tok-null">true</span>;</span>
<span class="line" id="L157"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L158"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L159"> }</span>
<span class="line" id="L160"> }</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L163"> }</span>
<span class="line" id="L164"></span>
<span class="line" id="L165"> <span class="tok-kw">if</span> (<span class="tok-number">0x1100</span> &lt;= code <span class="tok-kw">and</span> code &lt;= <span class="tok-number">0xd7c6</span>) {</span>
<span class="line" id="L166"> <span class="tok-kw">const</span> next_cp = self.buf[<span class="tok-number">1</span>].?;</span>
<span class="line" id="L167"></span>
<span class="line" id="L168"> <span class="tok-kw">if</span> (gbp.isL(code)) {</span>
<span class="line" id="L169"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x1100</span> <span class="tok-kw">and</span></span>
<span class="line" id="L170"> (gbp.isL(next_cp) <span class="tok-kw">or</span></span>
<span class="line" id="L171"> gbp.isV(next_cp) <span class="tok-kw">or</span></span>
<span class="line" id="L172"> gbp.isLv(next_cp) <span class="tok-kw">or</span></span>
<span class="line" id="L173"> gbp.isLvt(next_cp)))</span>
<span class="line" id="L174"> {</span>
<span class="line" id="L175"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L176"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L177"> }</span>
<span class="line" id="L178"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (gbp.isLv(code) <span class="tok-kw">or</span> gbp.isV(code)) {</span>
<span class="line" id="L179"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x1100</span> <span class="tok-kw">and</span></span>
<span class="line" id="L180"> (gbp.isV(next_cp) <span class="tok-kw">or</span></span>
<span class="line" id="L181"> gbp.isT(next_cp)))</span>
<span class="line" id="L182"> {</span>
<span class="line" id="L183"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L184"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L185"> }</span>
<span class="line" id="L186"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (gbp.isLvt(code) <span class="tok-kw">or</span> gbp.isT(code)) {</span>
<span class="line" id="L187"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x1100</span> <span class="tok-kw">and</span> gbp.isT(next_cp)) {</span>
<span class="line" id="L188"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L189"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L190"> }</span>
<span class="line" id="L191"> }</span>
<span class="line" id="L192"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (<span class="tok-number">0x600</span> &lt;= code <span class="tok-kw">and</span> code &lt;= <span class="tok-number">0x11f02</span>) {</span>
<span class="line" id="L193"> <span class="tok-kw">if</span> (gbp.isPrepend(code)) {</span>
<span class="line" id="L194"> <span class="tok-kw">const</span> next_cp = self.buf[<span class="tok-number">1</span>].?;</span>
<span class="line" id="L195"></span>
<span class="line" id="L196"> <span class="tok-kw">if</span> (isBreaker(next_cp)) {</span>
<span class="line" id="L197"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L198"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L199"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L200"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L201"> }</span>
<span class="line" id="L202"> }</span>
<span class="line" id="L203"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (<span class="tok-number">0x1f1e6</span> &lt;= code <span class="tok-kw">and</span> code &lt;= <span class="tok-number">0x1f1ff</span>) {</span>
<span class="line" id="L204"> <span class="tok-kw">if</span> (gbp.isRegionalIndicator(code)) {</span>
<span class="line" id="L205"> <span class="tok-kw">const</span> next_cp = self.buf[<span class="tok-number">1</span>].?;</span>
<span class="line" id="L206"></span>
<span class="line" id="L207"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x1f1e6</span> <span class="tok-kw">and</span> gbp.isRegionalIndicator(next_cp)) {</span>
<span class="line" id="L208"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L209"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L210"> }</span>
<span class="line" id="L211"> }</span>
<span class="line" id="L212"> }</span>
<span class="line" id="L213"></span>
<span class="line" id="L214"> <span class="tok-comment">// Extend / ignorables loop</span>
</span>
<span class="line" id="L215"> <span class="tok-kw">while</span> (self.buf[<span class="tok-number">1</span>]) |next_cp| {</span>
<span class="line" id="L216"> <span class="tok-kw">if</span> (next_cp &gt;= <span class="tok-number">0x300</span> <span class="tok-kw">and</span> isIgnorable(next_cp)) {</span>
<span class="line" id="L217"> <span class="tok-kw">try</span> encode_and_append(next_cp, &amp;all_bytes);</span>
<span class="line" id="L218"> _ = self.advance() <span class="tok-kw">catch</span> <span class="tok-kw">unreachable</span>;</span>
<span class="line" id="L219"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L220"> <span class="tok-kw">break</span>;</span>
<span class="line" id="L221"> }</span>
<span class="line" id="L222"> }</span>
<span class="line" id="L223"></span>
<span class="line" id="L224"> <span class="tok-kw">return</span> <span class="tok-kw">try</span> all_bytes.toOwnedSlice();</span>
<span class="line" id="L225"> }</span>
<span class="line" id="L226"></span>
<span class="line" id="L227"> <span class="tok-kw">fn</span> <span class="tok-fn">advance</span>(self: *Self) !?<span class="tok-type">u21</span> {</span>
<span class="line" id="L228"> self.buf[<span class="tok-number">0</span>] = self.buf[<span class="tok-number">1</span>];</span>
<span class="line" id="L229"> self.buf[<span class="tok-number">1</span>] = <span class="tok-kw">try</span> readCodePoint(self.reader);</span>
<span class="line" id="L230"></span>
<span class="line" id="L231"> <span class="tok-kw">return</span> self.buf[<span class="tok-number">0</span>];</span>
<span class="line" id="L232"> }</span>
<span class="line" id="L233"></span>
<span class="line" id="L234"> <span class="tok-kw">fn</span> <span class="tok-fn">peek</span>(self: Self) ?<span class="tok-type">u21</span> {</span>
<span class="line" id="L235"> <span class="tok-kw">return</span> self.buf[<span class="tok-number">1</span>];</span>
<span class="line" id="L236"> }</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"> <span class="tok-kw">fn</span> <span class="tok-fn">encode_and_append</span>(cp: <span class="tok-type">u21</span>, list: *std.ArrayList(<span class="tok-type">u8</span>)) !<span class="tok-type">void</span> {</span>
<span class="line" id="L239"> <span class="tok-kw">var</span> tmp: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L240"> <span class="tok-kw">const</span> len = <span class="tok-kw">try</span> unicode.utf8Encode(cp, &amp;tmp);</span>
<span class="line" id="L241"> <span class="tok-kw">try</span> list.appendSlice(tmp[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L242"> }</span>
<span class="line" id="L243"> };</span>
<span class="line" id="L244">}</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"><span class="tok-comment">// Predicates</span>
</span>
<span class="line" id="L247"><span class="tok-kw">fn</span> <span class="tok-fn">isBreaker</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L248"> <span class="tok-kw">return</span> cp == <span class="tok-str">'\x0d'</span> <span class="tok-kw">or</span> cp == <span class="tok-str">'\x0a'</span> <span class="tok-kw">or</span> gbp.isControl(cp);</span>
<span class="line" id="L249">}</span>
<span class="line" id="L250"></span>
<span class="line" id="L251"><span class="tok-kw">fn</span> <span class="tok-fn">isIgnorable</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L252"> <span class="tok-kw">return</span> gbp.isExtend(cp) <span class="tok-kw">or</span> gbp.isSpacingmark(cp) <span class="tok-kw">or</span> cp == <span class="tok-str">'\u{200d}'</span>;</span>
<span class="line" id="L253">}</span>
<span class="line" id="L254"></span>
<span class="line" id="L255"><span class="tok-kw">test</span> <span class="tok-str">&quot;Segmentation comptime GraphemeIterator&quot;</span> {</span>
<span class="line" id="L256"> <span class="tok-kw">const</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;H&quot;</span>, <span class="tok-str">&quot;é&quot;</span>, <span class="tok-str">&quot;l&quot;</span>, <span class="tok-str">&quot;l&quot;</span>, <span class="tok-str">&quot;o&quot;</span> };</span>
<span class="line" id="L257"></span>
<span class="line" id="L258"> <span class="tok-kw">comptime</span> {</span>
<span class="line" id="L259"> <span class="tok-kw">const</span> src = <span class="tok-str">&quot;Héllo&quot;</span>;</span>
<span class="line" id="L260"> <span class="tok-kw">var</span> ct_iter = GraphemeIterator.init(src);</span>
<span class="line" id="L261"> <span class="tok-kw">var</span> i = <span class="tok-number">0</span>;</span>
<span class="line" id="L262"> <span class="tok-kw">while</span> (ct_iter.next()) |grapheme| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L263"> <span class="tok-kw">try</span> std.testing.expect(grapheme.eql(src, want[i]));</span>
<span class="line" id="L264"> }</span>
<span class="line" id="L265"> }</span>
<span class="line" id="L266">}</span>
<span class="line" id="L267"></span>
<span class="line" id="L268"><span class="tok-kw">test</span> <span class="tok-str">&quot;Simple StreamingGraphemeIterator&quot;</span> {</span>
<span class="line" id="L269"> <span class="tok-kw">var</span> buf = <span class="tok-str">&quot;abe\u{301}😹&quot;</span>.*;</span>
<span class="line" id="L270"> <span class="tok-kw">var</span> fis = std.io.fixedBufferStream(&amp;buf);</span>
<span class="line" id="L271"> <span class="tok-kw">const</span> reader = fis.reader();</span>
<span class="line" id="L272"> <span class="tok-kw">var</span> iter = <span class="tok-kw">try</span> StreamingGraphemeIterator(<span class="tok-builtin">@TypeOf</span>(reader)).init(std.testing.allocator, reader);</span>
<span class="line" id="L273"> <span class="tok-kw">const</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;a&quot;</span>, <span class="tok-str">&quot;b&quot;</span>, <span class="tok-str">&quot;e\u{301}&quot;</span>, <span class="tok-str">&quot;😹&quot;</span> };</span>
<span class="line" id="L274"></span>
<span class="line" id="L275"> <span class="tok-kw">for</span> (want) |str| {</span>
<span class="line" id="L276"> <span class="tok-kw">const</span> gc = (<span class="tok-kw">try</span> iter.next()).?;</span>
<span class="line" id="L277"> <span class="tok-kw">defer</span> std.testing.allocator.free(gc);</span>
<span class="line" id="L278"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(gc, str);</span>
<span class="line" id="L279"> }</span>
<span class="line" id="L280"></span>
<span class="line" id="L281"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(?[]<span class="tok-type">u8</span>, <span class="tok-null">null</span>), <span class="tok-kw">try</span> iter.next());</span>
<span class="line" id="L282">}</span>
<span class="line" id="L283"></span>
<span class="line" id="L284"><span class="tok-kw">test</span> <span class="tok-str">&quot;Segmentation ZWJ and ZWSP emoji sequences&quot;</span> {</span>
<span class="line" id="L285"> <span class="tok-kw">const</span> seq_1 = <span class="tok-str">&quot;\u{1F43B}\u{200D}\u{2744}\u{FE0F}&quot;</span>;</span>
<span class="line" id="L286"> <span class="tok-kw">const</span> seq_2 = <span class="tok-str">&quot;\u{1F43B}\u{200D}\u{2744}\u{FE0F}&quot;</span>;</span>
<span class="line" id="L287"> <span class="tok-kw">const</span> with_zwj = seq_1 ++ <span class="tok-str">&quot;\u{200D}&quot;</span> ++ seq_2;</span>
<span class="line" id="L288"> <span class="tok-kw">const</span> with_zwsp = seq_1 ++ <span class="tok-str">&quot;\u{200B}&quot;</span> ++ seq_2;</span>
<span class="line" id="L289"> <span class="tok-kw">const</span> no_joiner = seq_1 ++ seq_2;</span>
<span class="line" id="L290"></span>
<span class="line" id="L291"> <span class="tok-kw">var</span> ct_iter = GraphemeIterator.init(with_zwj);</span>
<span class="line" id="L292"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L293"> <span class="tok-kw">while</span> (ct_iter.next()) |_| : (i += <span class="tok-number">1</span>) {}</span>
<span class="line" id="L294"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">1</span>), i);</span>
<span class="line" id="L295"></span>
<span class="line" id="L296"> ct_iter = GraphemeIterator.init(with_zwsp);</span>
<span class="line" id="L297"> i = <span class="tok-number">0</span>;</span>
<span class="line" id="L298"> <span class="tok-kw">while</span> (ct_iter.next()) |_| : (i += <span class="tok-number">1</span>) {}</span>
<span class="line" id="L299"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">3</span>), i);</span>
<span class="line" id="L300"></span>
<span class="line" id="L301"> ct_iter = GraphemeIterator.init(no_joiner);</span>
<span class="line" id="L302"> i = <span class="tok-number">0</span>;</span>
<span class="line" id="L303"> <span class="tok-kw">while</span> (ct_iter.next()) |_| : (i += <span class="tok-number">1</span>) {}</span>
<span class="line" id="L304"> <span class="tok-kw">try</span> std.testing.expectEqual(<span class="tok-builtin">@as</span>(<span class="tok-type">usize</span>, <span class="tok-number">2</span>), i);</span>
<span class="line" id="L305">}</span>
<span class="line" id="L306"></span>
<span class="line" id="L307"><span class="tok-comment">// Grapheme break state.</span>
</span>
<span class="line" id="L308"><span class="tok-kw">fn</span> <span class="tok-fn">hasXpic</span>(state: *<span class="tok-kw">const</span> <span class="tok-type">u3</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L309"> <span class="tok-kw">return</span> state.* &amp; <span class="tok-number">1</span> == <span class="tok-number">1</span>;</span>
<span class="line" id="L310">}</span>
<span class="line" id="L311"></span>
<span class="line" id="L312"><span class="tok-kw">fn</span> <span class="tok-fn">setXpic</span>(state: *<span class="tok-type">u3</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L313"> state.* |= <span class="tok-number">1</span>;</span>
<span class="line" id="L314">}</span>
<span class="line" id="L315"></span>
<span class="line" id="L316"><span class="tok-kw">fn</span> <span class="tok-fn">unsetXpic</span>(state: *<span class="tok-type">u3</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L317"> state.* ^= <span class="tok-number">1</span>;</span>
<span class="line" id="L318">}</span>
<span class="line" id="L319"></span>
<span class="line" id="L320"><span class="tok-kw">fn</span> <span class="tok-fn">hasRegional</span>(state: *<span class="tok-kw">const</span> <span class="tok-type">u3</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L321"> <span class="tok-kw">return</span> state.* &amp; <span class="tok-number">2</span> == <span class="tok-number">2</span>;</span>
<span class="line" id="L322">}</span>
<span class="line" id="L323"></span>
<span class="line" id="L324"><span class="tok-kw">fn</span> <span class="tok-fn">setRegional</span>(state: *<span class="tok-type">u3</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L325"> state.* |= <span class="tok-number">2</span>;</span>
<span class="line" id="L326">}</span>
<span class="line" id="L327"></span>
<span class="line" id="L328"><span class="tok-kw">fn</span> <span class="tok-fn">unsetRegional</span>(state: *<span class="tok-type">u3</span>) <span class="tok-type">void</span> {</span>
<span class="line" id="L329"> state.* ^= <span class="tok-number">2</span>;</span>
<span class="line" id="L330">}</span>
<span class="line" id="L331"></span>
<span class="line" id="L332"><span class="tok-comment">/// `graphemeBreak` returns true only if a grapheme break point is required</span></span>
<span class="line" id="L333"><span class="tok-comment">/// between `cp1` and `cp2`. `state` should start out as 0. If calling</span></span>
<span class="line" id="L334"><span class="tok-comment">/// iteratively over a sequence of code points, this function must be called</span></span>
<span class="line" id="L335"><span class="tok-comment">/// IN ORDER on ALL potential breaks in a string.</span></span>
<span class="line" id="L336"><span class="tok-comment">/// Modeled after the API of utf8proc's `utf8proc_grapheme_break_stateful`.</span></span>
<span class="line" id="L337"><span class="tok-comment">/// https://github.com/JuliaStrings/utf8proc/blob/2bbb1ba932f727aad1fab14fafdbc89ff9dc4604/utf8proc.h#L599-L617</span></span>
<span class="line" id="L338"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">graphemeBreak</span>(</span>
<span class="line" id="L339"> cp1: <span class="tok-type">u21</span>,</span>
<span class="line" id="L340"> cp2: <span class="tok-type">u21</span>,</span>
<span class="line" id="L341"> state: *<span class="tok-type">u3</span>,</span>
<span class="line" id="L342">) <span class="tok-type">bool</span> {</span>
<span class="line" id="L343"> <span class="tok-comment">// GB11: Emoji Extend* ZWJ x Emoji</span>
</span>
<span class="line" id="L344"> <span class="tok-kw">if</span> (!hasXpic(state) <span class="tok-kw">and</span> emoji.isExtendedPictographic(cp1)) setXpic(state);</span>
<span class="line" id="L345"></span>
<span class="line" id="L346"> <span class="tok-comment">// GB3: CR x LF</span>
</span>
<span class="line" id="L347"> <span class="tok-kw">if</span> (cp1 == <span class="tok-str">'\r'</span> <span class="tok-kw">and</span> cp2 == <span class="tok-str">'\n'</span>) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L348"></span>
<span class="line" id="L349"> <span class="tok-comment">// GB4: Control</span>
</span>
<span class="line" id="L350"> <span class="tok-kw">if</span> (isBreaker(cp1)) <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L351"></span>
<span class="line" id="L352"> <span class="tok-comment">// GB6: Hangul L x (L|V|LV|VT)</span>
</span>
<span class="line" id="L353"> <span class="tok-kw">if</span> (gbp.isL(cp1)) {</span>
<span class="line" id="L354"> <span class="tok-kw">if</span> (gbp.isL(cp2) <span class="tok-kw">or</span></span>
<span class="line" id="L355"> gbp.isV(cp2) <span class="tok-kw">or</span></span>
<span class="line" id="L356"> gbp.isLv(cp2) <span class="tok-kw">or</span></span>
<span class="line" id="L357"> gbp.isLvt(cp2)) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L358"> }</span>
<span class="line" id="L359"></span>
<span class="line" id="L360"> <span class="tok-comment">// GB7: Hangul (LV | V) x (V | T)</span>
</span>
<span class="line" id="L361"> <span class="tok-kw">if</span> (gbp.isLv(cp1) <span class="tok-kw">or</span> gbp.isV(cp1)) {</span>
<span class="line" id="L362"> <span class="tok-kw">if</span> (gbp.isV(cp2) <span class="tok-kw">or</span></span>
<span class="line" id="L363"> gbp.isT(cp2)) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L364"> }</span>
<span class="line" id="L365"></span>
<span class="line" id="L366"> <span class="tok-comment">// GB8: Hangul (LVT | T) x T</span>
</span>
<span class="line" id="L367"> <span class="tok-kw">if</span> (gbp.isLvt(cp1) <span class="tok-kw">or</span> gbp.isT(cp1)) {</span>
<span class="line" id="L368"> <span class="tok-kw">if</span> (gbp.isT(cp2)) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L369"> }</span>
<span class="line" id="L370"></span>
<span class="line" id="L371"> <span class="tok-comment">// GB9b: x (Extend | ZWJ)</span>
</span>
<span class="line" id="L372"> <span class="tok-kw">if</span> (gbp.isExtend(cp2) <span class="tok-kw">or</span> gbp.isZwj(cp2)) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L373"></span>
<span class="line" id="L374"> <span class="tok-comment">// GB9a: x Spacing</span>
</span>
<span class="line" id="L375"> <span class="tok-kw">if</span> (gbp.isSpacingmark(cp2)) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L376"></span>
<span class="line" id="L377"> <span class="tok-comment">// GB9b: Prepend x</span>
</span>
<span class="line" id="L378"> <span class="tok-kw">if</span> (gbp.isPrepend(cp1) <span class="tok-kw">and</span> !isBreaker(cp2)) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L379"></span>
<span class="line" id="L380"> <span class="tok-comment">// GB12, GB13: RI x RI</span>
</span>
<span class="line" id="L381"> <span class="tok-kw">if</span> (gbp.isRegionalIndicator(cp1) <span class="tok-kw">and</span> gbp.isRegionalIndicator(cp2)) {</span>
<span class="line" id="L382"> <span class="tok-kw">if</span> (hasRegional(state)) {</span>
<span class="line" id="L383"> unsetRegional(state);</span>
<span class="line" id="L384"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L385"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L386"> setRegional(state);</span>
<span class="line" id="L387"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L388"> }</span>
<span class="line" id="L389"> }</span>
<span class="line" id="L390"></span>
<span class="line" id="L391"> <span class="tok-comment">// GB11: Emoji Extend* ZWJ x Emoji</span>
</span>
<span class="line" id="L392"> <span class="tok-kw">if</span> (hasXpic(state) <span class="tok-kw">and</span></span>
<span class="line" id="L393"> gbp.isZwj(cp1) <span class="tok-kw">and</span></span>
<span class="line" id="L394"> emoji.isExtendedPictographic(cp2))</span>
<span class="line" id="L395"> {</span>
<span class="line" id="L396"> unsetXpic(state);</span>
<span class="line" id="L397"> <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L398"> }</span>
<span class="line" id="L399"></span>
<span class="line" id="L400"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L401">}</span>
<span class="line" id="L402"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `Sentence` represents a sentence within a UTF-8 encoded string.</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> unicode = std.unicode;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> sbp = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/sentence_break_property.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> CodePoint = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;CodePoint.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> CodePointIterator = CodePoint.CodePointIterator;</span>
<span class="line" id="L9"></span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Sentence = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L11"></span>
<span class="line" id="L12">bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L13">offset: <span class="tok-type">usize</span>,</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-comment">/// `eql` compares `str` with the bytes of this sentence for equality.</span></span>
<span class="line" id="L16"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eql</span>(self: Sentence, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L17"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, self.bytes, str);</span>
<span class="line" id="L18">}</span>
<span class="line" id="L19"></span>
<span class="line" id="L20"><span class="tok-kw">const</span> Type = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L21"> aterm,</span>
<span class="line" id="L22"> close,</span>
<span class="line" id="L23"> cr,</span>
<span class="line" id="L24"> extend,</span>
<span class="line" id="L25"> format,</span>
<span class="line" id="L26"> lf,</span>
<span class="line" id="L27"> lower,</span>
<span class="line" id="L28"> numeric,</span>
<span class="line" id="L29"> oletter,</span>
<span class="line" id="L30"> scontinue,</span>
<span class="line" id="L31"> sep,</span>
<span class="line" id="L32"> sp,</span>
<span class="line" id="L33"> sterm,</span>
<span class="line" id="L34"> upper,</span>
<span class="line" id="L35"> any,</span>
<span class="line" id="L36"></span>
<span class="line" id="L37"> <span class="tok-kw">fn</span> <span class="tok-fn">get</span>(cp: CodePoint) Type {</span>
<span class="line" id="L38"> <span class="tok-kw">var</span> ty: Type = .any;</span>
<span class="line" id="L39"> <span class="tok-kw">if</span> (<span class="tok-number">0x000D</span> == cp.code) ty = .cr;</span>
<span class="line" id="L40"> <span class="tok-kw">if</span> (<span class="tok-number">0x000A</span> == cp.code) ty = .lf;</span>
<span class="line" id="L41"> <span class="tok-kw">if</span> (sbp.isLower(cp.code)) ty = .lower;</span>
<span class="line" id="L42"> <span class="tok-kw">if</span> (sbp.isUpper(cp.code)) ty = .upper;</span>
<span class="line" id="L43"> <span class="tok-kw">if</span> (sbp.isOletter(cp.code)) ty = .oletter;</span>
<span class="line" id="L44"> <span class="tok-kw">if</span> (sbp.isNumeric(cp.code)) ty = .numeric;</span>
<span class="line" id="L45"> <span class="tok-kw">if</span> (sbp.isSep(cp.code)) ty = .sep;</span>
<span class="line" id="L46"> <span class="tok-kw">if</span> (sbp.isSp(cp.code)) ty = .sp;</span>
<span class="line" id="L47"> <span class="tok-kw">if</span> (sbp.isClose(cp.code)) ty = .close;</span>
<span class="line" id="L48"> <span class="tok-kw">if</span> (sbp.isAterm(cp.code)) ty = .aterm;</span>
<span class="line" id="L49"> <span class="tok-kw">if</span> (sbp.isSterm(cp.code)) ty = .sterm;</span>
<span class="line" id="L50"> <span class="tok-kw">if</span> (sbp.isScontinue(cp.code)) ty = .scontinue;</span>
<span class="line" id="L51"> <span class="tok-kw">if</span> (sbp.isExtend(cp.code)) ty = .extend;</span>
<span class="line" id="L52"> <span class="tok-kw">if</span> (sbp.isFormat(cp.code)) ty = .format;</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"> <span class="tok-kw">return</span> ty;</span>
<span class="line" id="L55"> }</span>
<span class="line" id="L56">};</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"><span class="tok-kw">const</span> Token = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L59"> ty: Type,</span>
<span class="line" id="L60"> code_point: CodePoint,</span>
<span class="line" id="L61"> offset: <span class="tok-type">usize</span> = <span class="tok-number">0</span>,</span>
<span class="line" id="L62"></span>
<span class="line" id="L63"> <span class="tok-kw">fn</span> <span class="tok-fn">is</span>(self: Token, ty: Type) <span class="tok-type">bool</span> {</span>
<span class="line" id="L64"> <span class="tok-kw">return</span> self.ty == ty;</span>
<span class="line" id="L65"> }</span>
<span class="line" id="L66">};</span>
<span class="line" id="L67"></span>
<span class="line" id="L68"><span class="tok-kw">const</span> TokenList = std.ArrayList(Token);</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"><span class="tok-comment">/// `SentenceIterator` iterates a string one sentence at-a-time.</span></span>
<span class="line" id="L71"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> SentenceIterator = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L72"> bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L73"> i: ?<span class="tok-type">usize</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L74"> start: ?Token = <span class="tok-null">null</span>,</span>
<span class="line" id="L75"> tokens: TokenList,</span>
<span class="line" id="L76"></span>
<span class="line" id="L77"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L78"></span>
<span class="line" id="L79"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Self {</span>
<span class="line" id="L80"> <span class="tok-kw">if</span> (!unicode.utf8ValidateSlice(str)) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidUtf8;</span>
<span class="line" id="L81"></span>
<span class="line" id="L82"> <span class="tok-kw">var</span> self = Self{</span>
<span class="line" id="L83"> .bytes = str,</span>
<span class="line" id="L84"> .tokens = TokenList.init(allocator),</span>
<span class="line" id="L85"> };</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> <span class="tok-kw">try</span> self.lex();</span>
<span class="line" id="L88"></span>
<span class="line" id="L89"> <span class="tok-kw">if</span> (self.tokens.items.len == <span class="tok-number">0</span>) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.NoTokens;</span>
<span class="line" id="L90"> self.start = self.tokens.items[<span class="tok-number">0</span>];</span>
<span class="line" id="L91"></span>
<span class="line" id="L92"> <span class="tok-comment">// Set token offsets.</span>
</span>
<span class="line" id="L93"> <span class="tok-kw">for</span> (self.tokens.items, <span class="tok-number">0</span>..) |*token, i| {</span>
<span class="line" id="L94"> token.offset = i;</span>
<span class="line" id="L95"> }</span>
<span class="line" id="L96"></span>
<span class="line" id="L97"> <span class="tok-kw">return</span> self;</span>
<span class="line" id="L98"> }</span>
<span class="line" id="L99"></span>
<span class="line" id="L100"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">deinit</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L101"> self.tokens.deinit();</span>
<span class="line" id="L102"> }</span>
<span class="line" id="L103"></span>
<span class="line" id="L104"> <span class="tok-kw">fn</span> <span class="tok-fn">lex</span>(self: *Self) !<span class="tok-type">void</span> {</span>
<span class="line" id="L105"> <span class="tok-kw">var</span> iter = CodePointIterator{</span>
<span class="line" id="L106"> .bytes = self.bytes,</span>
<span class="line" id="L107"> .i = <span class="tok-number">0</span>,</span>
<span class="line" id="L108"> };</span>
<span class="line" id="L109"></span>
<span class="line" id="L110"> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L111"> <span class="tok-kw">try</span> self.tokens.append(.{</span>
<span class="line" id="L112"> .ty = Type.get(cp),</span>
<span class="line" id="L113"> .code_point = cp,</span>
<span class="line" id="L114"> });</span>
<span class="line" id="L115"> }</span>
<span class="line" id="L116"> }</span>
<span class="line" id="L117"></span>
<span class="line" id="L118"> <span class="tok-comment">// Main API.</span>
</span>
<span class="line" id="L119"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">next</span>(self: *Self) ?Sentence {</span>
<span class="line" id="L120"> no_break: <span class="tok-kw">while</span> (self.advance()) |current_token| {</span>
<span class="line" id="L121"> <span class="tok-kw">if</span> (isParaSep(current_token)) {</span>
<span class="line" id="L122"> <span class="tok-kw">var</span> end = current_token;</span>
<span class="line" id="L123"></span>
<span class="line" id="L124"> <span class="tok-kw">if</span> (current_token.is(.cr)) {</span>
<span class="line" id="L125"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L126"> <span class="tok-kw">if</span> (p.is(.lf)) {</span>
<span class="line" id="L127"> _ = self.advance();</span>
<span class="line" id="L128"> end = self.current();</span>
<span class="line" id="L129"> }</span>
<span class="line" id="L130"> }</span>
<span class="line" id="L131"> }</span>
<span class="line" id="L132"></span>
<span class="line" id="L133"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L134"> self.start = self.peek();</span>
<span class="line" id="L135"></span>
<span class="line" id="L136"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L137"> }</span>
<span class="line" id="L138"></span>
<span class="line" id="L139"> <span class="tok-kw">if</span> (current_token.is(.aterm)) {</span>
<span class="line" id="L140"> <span class="tok-kw">var</span> end = self.current();</span>
<span class="line" id="L141"></span>
<span class="line" id="L142"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L143"> <span class="tok-kw">if</span> (isUpper(p)) {</span>
<span class="line" id="L144"> <span class="tok-comment">// self.i may not be the same as current token's offset due to ignorable skipping.</span>
</span>
<span class="line" id="L145"> <span class="tok-kw">const</span> original_i = self.i;</span>
<span class="line" id="L146"> self.i = current_token.offset;</span>
<span class="line" id="L147"> <span class="tok-kw">defer</span> self.i = original_i;</span>
<span class="line" id="L148"></span>
<span class="line" id="L149"> <span class="tok-kw">if</span> (self.prevAfterSkip(isIgnorable)) |v| {</span>
<span class="line" id="L150"> <span class="tok-kw">if</span> (isUpperLower(v)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L151"> }</span>
<span class="line" id="L152"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isParaSep(p) <span class="tok-kw">or</span> isLower(p) <span class="tok-kw">or</span> isNumeric(p) <span class="tok-kw">or</span> isSContinue(p)) {</span>
<span class="line" id="L153"> <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L154"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isSpace(p)) {</span>
<span class="line" id="L155"> <span class="tok-comment">// ATerm Sp*</span>
</span>
<span class="line" id="L156"> self.run(isSpace);</span>
<span class="line" id="L157"> end = self.current();</span>
<span class="line" id="L158"> <span class="tok-comment">// Possible lower case after.</span>
</span>
<span class="line" id="L159"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L160"> <span class="tok-kw">if</span> (isLower(pp)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L161"> }</span>
<span class="line" id="L162"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isClose(p)) {</span>
<span class="line" id="L163"> <span class="tok-comment">// ATerm Close*</span>
</span>
<span class="line" id="L164"> self.run(isClose);</span>
<span class="line" id="L165"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L166"> <span class="tok-comment">// Possible ParaSep after.</span>
</span>
<span class="line" id="L167"> <span class="tok-kw">if</span> (isParaSep(pp)) {</span>
<span class="line" id="L168"> _ = self.advance();</span>
<span class="line" id="L169"> end = self.current();</span>
<span class="line" id="L170"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L171"> self.start = self.peek();</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L174"> }</span>
<span class="line" id="L175"> <span class="tok-comment">// Possible spaces after.</span>
</span>
<span class="line" id="L176"> <span class="tok-kw">if</span> (isSpace(pp)) {</span>
<span class="line" id="L177"> <span class="tok-comment">// ATerm Close* Sp*</span>
</span>
<span class="line" id="L178"> self.run(isSpace);</span>
<span class="line" id="L179"></span>
<span class="line" id="L180"> <span class="tok-kw">if</span> (self.peek()) |ppp| {</span>
<span class="line" id="L181"> <span class="tok-comment">// Possible lower after.</span>
</span>
<span class="line" id="L182"> <span class="tok-kw">if</span> (isLower(ppp)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L183"> <span class="tok-comment">// Possible lower after some allowed code points.</span>
</span>
<span class="line" id="L184"> <span class="tok-kw">if</span> (isAllowedBeforeLower(ppp)) {</span>
<span class="line" id="L185"> <span class="tok-kw">if</span> (self.peekAfterSkip(isAllowedBeforeLower)) |pppp| {</span>
<span class="line" id="L186"> <span class="tok-comment">// ATerm Close* Sp* !(Unallowed) Lower</span>
</span>
<span class="line" id="L187"> <span class="tok-kw">if</span> (isLower(pppp)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L188"> }</span>
<span class="line" id="L189"> }</span>
<span class="line" id="L190"> }</span>
<span class="line" id="L191"> }</span>
<span class="line" id="L192"> }</span>
<span class="line" id="L193"></span>
<span class="line" id="L194"> end = self.current();</span>
<span class="line" id="L195"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isSATerm(p)) {</span>
<span class="line" id="L196"> self.run(isSATerm);</span>
<span class="line" id="L197"> end = self.current();</span>
<span class="line" id="L198"> }</span>
<span class="line" id="L199"> }</span>
<span class="line" id="L200"></span>
<span class="line" id="L201"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L202"> self.start = self.peek();</span>
<span class="line" id="L203"></span>
<span class="line" id="L204"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L205"> }</span>
<span class="line" id="L206"></span>
<span class="line" id="L207"> <span class="tok-kw">if</span> (current_token.is(.sterm)) {</span>
<span class="line" id="L208"> <span class="tok-kw">var</span> end = self.current();</span>
<span class="line" id="L209"></span>
<span class="line" id="L210"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L211"> <span class="tok-kw">if</span> (isParaSep(p) <span class="tok-kw">or</span> isSATerm(p) <span class="tok-kw">or</span> isSContinue(p)) {</span>
<span class="line" id="L212"> _ = self.advance();</span>
<span class="line" id="L213"> end = self.current();</span>
<span class="line" id="L214"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isSpace(p)) {</span>
<span class="line" id="L215"> self.run(isSpace);</span>
<span class="line" id="L216"> end = self.current();</span>
<span class="line" id="L217"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isClose(p)) {</span>
<span class="line" id="L218"> <span class="tok-comment">// STerm Close*</span>
</span>
<span class="line" id="L219"> self.run(isClose);</span>
<span class="line" id="L220"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L221"> <span class="tok-kw">if</span> (isSpace(pp)) {</span>
<span class="line" id="L222"> <span class="tok-comment">// STerm Close* Sp*</span>
</span>
<span class="line" id="L223"> self.run(isSpace);</span>
<span class="line" id="L224"> }</span>
<span class="line" id="L225"> }</span>
<span class="line" id="L226"></span>
<span class="line" id="L227"> end = self.current();</span>
<span class="line" id="L228"> }</span>
<span class="line" id="L229"> }</span>
<span class="line" id="L230"></span>
<span class="line" id="L231"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L232"> self.start = self.peek();</span>
<span class="line" id="L233"></span>
<span class="line" id="L234"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L235"> }</span>
<span class="line" id="L236"> }</span>
<span class="line" id="L237"></span>
<span class="line" id="L238"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (self.start) |start| self.emit(start, self.last()) <span class="tok-kw">else</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L239"> }</span>
<span class="line" id="L240"></span>
<span class="line" id="L241"> <span class="tok-comment">// Token array movement.</span>
</span>
<span class="line" id="L242"> <span class="tok-kw">fn</span> <span class="tok-fn">forward</span>(self: *Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L243"> <span class="tok-kw">if</span> (self.i) |*index| {</span>
<span class="line" id="L244"> index.* += <span class="tok-number">1</span>;</span>
<span class="line" id="L245"> <span class="tok-kw">if</span> (index.* &gt;= self.tokens.items.len) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L246"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L247"> self.i = <span class="tok-number">0</span>;</span>
<span class="line" id="L248"> }</span>
<span class="line" id="L249"></span>
<span class="line" id="L250"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L251"> }</span>
<span class="line" id="L252"></span>
<span class="line" id="L253"> <span class="tok-comment">// Token array movement.</span>
</span>
<span class="line" id="L254"> <span class="tok-kw">fn</span> <span class="tok-fn">getRelative</span>(self: Self, n: <span class="tok-type">isize</span>) ?Token {</span>
<span class="line" id="L255"> <span class="tok-kw">var</span> index: <span class="tok-type">usize</span> = self.i <span class="tok-kw">orelse</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L256"></span>
<span class="line" id="L257"> <span class="tok-kw">if</span> (n &lt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L258"> <span class="tok-kw">if</span> (index == <span class="tok-number">0</span> <span class="tok-kw">or</span> -%n &gt; index) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L259"> index -= <span class="tok-builtin">@intCast</span>(-%n);</span>
<span class="line" id="L260"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L261"> <span class="tok-kw">const</span> un: <span class="tok-type">usize</span> = <span class="tok-builtin">@intCast</span>(n);</span>
<span class="line" id="L262"> <span class="tok-kw">if</span> (index + un &gt;= self.tokens.items.len) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L263"> index += un;</span>
<span class="line" id="L264"> }</span>
<span class="line" id="L265"></span>
<span class="line" id="L266"> <span class="tok-kw">return</span> self.tokens.items[index];</span>
<span class="line" id="L267"> }</span>
<span class="line" id="L268"></span>
<span class="line" id="L269"> <span class="tok-kw">fn</span> <span class="tok-fn">prevAfterSkip</span>(self: *Self, predicate: TokenPredicate) ?Token {</span>
<span class="line" id="L270"> <span class="tok-kw">if</span> (self.i == <span class="tok-null">null</span> <span class="tok-kw">or</span> self.i.? == <span class="tok-number">0</span>) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L271"></span>
<span class="line" id="L272"> <span class="tok-kw">var</span> i: <span class="tok-type">isize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L273"> <span class="tok-kw">while</span> (self.getRelative(-i)) |token| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L274"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">return</span> token;</span>
<span class="line" id="L275"> }</span>
<span class="line" id="L276"></span>
<span class="line" id="L277"> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L278"> }</span>
<span class="line" id="L279"></span>
<span class="line" id="L280"> <span class="tok-kw">fn</span> <span class="tok-fn">current</span>(self: Self) Token {</span>
<span class="line" id="L281"> <span class="tok-comment">// Assumes self.i is not null.</span>
</span>
<span class="line" id="L282"> <span class="tok-kw">return</span> self.tokens.items[self.i.?];</span>
<span class="line" id="L283"> }</span>
<span class="line" id="L284"></span>
<span class="line" id="L285"> <span class="tok-kw">fn</span> <span class="tok-fn">last</span>(self: Self) Token {</span>
<span class="line" id="L286"> <span class="tok-kw">return</span> self.tokens.items[self.tokens.items.len - <span class="tok-number">1</span>];</span>
<span class="line" id="L287"> }</span>
<span class="line" id="L288"></span>
<span class="line" id="L289"> <span class="tok-kw">fn</span> <span class="tok-fn">peek</span>(self: Self) ?Token {</span>
<span class="line" id="L290"> <span class="tok-kw">return</span> self.getRelative(<span class="tok-number">1</span>);</span>
<span class="line" id="L291"> }</span>
<span class="line" id="L292"></span>
<span class="line" id="L293"> <span class="tok-kw">fn</span> <span class="tok-fn">peekAfterSkip</span>(self: *Self, predicate: TokenPredicate) ?Token {</span>
<span class="line" id="L294"> <span class="tok-kw">var</span> i: <span class="tok-type">isize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L295"> <span class="tok-kw">while</span> (self.getRelative(i)) |token| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L296"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">return</span> token;</span>
<span class="line" id="L297"> }</span>
<span class="line" id="L298"></span>
<span class="line" id="L299"> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L300"> }</span>
<span class="line" id="L301"></span>
<span class="line" id="L302"> <span class="tok-kw">fn</span> <span class="tok-fn">advance</span>(self: *Self) ?Token {</span>
<span class="line" id="L303"> <span class="tok-kw">const</span> token = <span class="tok-kw">if</span> (self.forward()) self.current() <span class="tok-kw">else</span> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L304"> <span class="tok-kw">if</span> (!isParaSep(token)) _ = self.skipIgnorables(token);</span>
<span class="line" id="L305"></span>
<span class="line" id="L306"> <span class="tok-kw">return</span> token;</span>
<span class="line" id="L307"> }</span>
<span class="line" id="L308"></span>
<span class="line" id="L309"> <span class="tok-kw">fn</span> <span class="tok-fn">run</span>(self: *Self, predicate: TokenPredicate) <span class="tok-type">void</span> {</span>
<span class="line" id="L310"> <span class="tok-kw">while</span> (self.peek()) |token| {</span>
<span class="line" id="L311"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">break</span>;</span>
<span class="line" id="L312"> _ = self.advance();</span>
<span class="line" id="L313"> }</span>
<span class="line" id="L314"> }</span>
<span class="line" id="L315"></span>
<span class="line" id="L316"> <span class="tok-kw">fn</span> <span class="tok-fn">skipIgnorables</span>(self: *Self, end: Token) Token {</span>
<span class="line" id="L317"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L318"> <span class="tok-kw">if</span> (isIgnorable(p)) {</span>
<span class="line" id="L319"> self.run(isIgnorable);</span>
<span class="line" id="L320"> <span class="tok-kw">return</span> self.current();</span>
<span class="line" id="L321"> }</span>
<span class="line" id="L322"> }</span>
<span class="line" id="L323"></span>
<span class="line" id="L324"> <span class="tok-kw">return</span> end;</span>
<span class="line" id="L325"> }</span>
<span class="line" id="L326"></span>
<span class="line" id="L327"> <span class="tok-comment">// Production.</span>
</span>
<span class="line" id="L328"> <span class="tok-kw">fn</span> <span class="tok-fn">emit</span>(self: Self, start_token: Token, end_token: Token) Sentence {</span>
<span class="line" id="L329"> <span class="tok-kw">const</span> start = start_token.code_point.offset;</span>
<span class="line" id="L330"> <span class="tok-kw">const</span> end = end_token.code_point.offset + end_token.code_point.len;</span>
<span class="line" id="L331"></span>
<span class="line" id="L332"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L333"> .bytes = self.bytes[start..end],</span>
<span class="line" id="L334"> .offset = start,</span>
<span class="line" id="L335"> };</span>
<span class="line" id="L336"> }</span>
<span class="line" id="L337">};</span>
<span class="line" id="L338"></span>
<span class="line" id="L339"><span class="tok-comment">// Predicates</span>
</span>
<span class="line" id="L340"><span class="tok-kw">const</span> TokenPredicate = *<span class="tok-kw">const</span> <span class="tok-kw">fn</span> (Token) <span class="tok-type">bool</span>;</span>
<span class="line" id="L341"></span>
<span class="line" id="L342"><span class="tok-kw">fn</span> <span class="tok-fn">isNumeric</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L343"> <span class="tok-kw">return</span> token.ty == .numeric;</span>
<span class="line" id="L344">}</span>
<span class="line" id="L345"></span>
<span class="line" id="L346"><span class="tok-kw">fn</span> <span class="tok-fn">isLower</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L347"> <span class="tok-kw">return</span> token.ty == .lower;</span>
<span class="line" id="L348">}</span>
<span class="line" id="L349"></span>
<span class="line" id="L350"><span class="tok-kw">fn</span> <span class="tok-fn">isUpper</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L351"> <span class="tok-kw">return</span> token.ty == .upper;</span>
<span class="line" id="L352">}</span>
<span class="line" id="L353"></span>
<span class="line" id="L354"><span class="tok-kw">fn</span> <span class="tok-fn">isUpperLower</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L355"> <span class="tok-kw">return</span> isUpper(token) <span class="tok-kw">or</span> isLower(token);</span>
<span class="line" id="L356">}</span>
<span class="line" id="L357"></span>
<span class="line" id="L358"><span class="tok-kw">fn</span> <span class="tok-fn">isIgnorable</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L359"> <span class="tok-kw">return</span> token.ty == .extend <span class="tok-kw">or</span> token.ty == .format;</span>
<span class="line" id="L360">}</span>
<span class="line" id="L361"></span>
<span class="line" id="L362"><span class="tok-kw">fn</span> <span class="tok-fn">isClose</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L363"> <span class="tok-kw">return</span> token.ty == .close;</span>
<span class="line" id="L364">}</span>
<span class="line" id="L365"></span>
<span class="line" id="L366"><span class="tok-kw">fn</span> <span class="tok-fn">isSpace</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L367"> <span class="tok-kw">return</span> token.ty == .sp;</span>
<span class="line" id="L368">}</span>
<span class="line" id="L369"></span>
<span class="line" id="L370"><span class="tok-kw">fn</span> <span class="tok-fn">isParaSep</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L371"> <span class="tok-kw">return</span> token.ty == .cr <span class="tok-kw">or</span> token.ty == .lf <span class="tok-kw">or</span> token.ty == .sep;</span>
<span class="line" id="L372">}</span>
<span class="line" id="L373"></span>
<span class="line" id="L374"><span class="tok-kw">fn</span> <span class="tok-fn">isSATerm</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L375"> <span class="tok-kw">return</span> token.ty == .aterm <span class="tok-kw">or</span> token.ty == .sterm;</span>
<span class="line" id="L376">}</span>
<span class="line" id="L377"></span>
<span class="line" id="L378"><span class="tok-kw">fn</span> <span class="tok-fn">isSContinue</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L379"> <span class="tok-kw">return</span> token.ty == .scontinue;</span>
<span class="line" id="L380">}</span>
<span class="line" id="L381"></span>
<span class="line" id="L382"><span class="tok-kw">fn</span> <span class="tok-fn">isUnallowedBeforeLower</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L383"> <span class="tok-kw">return</span> token.ty == .oletter <span class="tok-kw">or</span> isUpperLower(token) <span class="tok-kw">or</span> isSATerm(token) <span class="tok-kw">or</span> isParaSep(token);</span>
<span class="line" id="L384">}</span>
<span class="line" id="L385"></span>
<span class="line" id="L386"><span class="tok-kw">fn</span> <span class="tok-fn">isAllowedBeforeLower</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L387"> <span class="tok-kw">return</span> !isUnallowedBeforeLower(token);</span>
<span class="line" id="L388">}</span>
<span class="line" id="L389"></span>
<span class="line" id="L390"><span class="tok-comment">// Comptime</span>
</span>
<span class="line" id="L391"><span class="tok-kw">fn</span> <span class="tok-fn">getTokens</span>(<span class="tok-kw">comptime</span> str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>, <span class="tok-kw">comptime</span> n: <span class="tok-type">usize</span>) [n]Token {</span>
<span class="line" id="L392"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L393"> <span class="tok-kw">var</span> cp_iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L394"> <span class="tok-kw">var</span> tokens: [n]Token = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L395"></span>
<span class="line" id="L396"> <span class="tok-kw">while</span> (cp_iter.next()) |cp| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L397"> tokens[i] = .{</span>
<span class="line" id="L398"> .ty = Type.get(cp),</span>
<span class="line" id="L399"> .code_point = cp,</span>
<span class="line" id="L400"> .offset = i,</span>
<span class="line" id="L401"> };</span>
<span class="line" id="L402"> }</span>
<span class="line" id="L403"></span>
<span class="line" id="L404"> <span class="tok-kw">return</span> tokens;</span>
<span class="line" id="L405">}</span>
<span class="line" id="L406"></span>
<span class="line" id="L407"><span class="tok-comment">/// `ComptimeSentenceIterator` is like `SentenceIterator` but requires a string literal to do its work at compile time.</span></span>
<span class="line" id="L408"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">ComptimeSentenceIterator</span>(<span class="tok-kw">comptime</span> str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">type</span> {</span>
<span class="line" id="L409"> <span class="tok-kw">const</span> cp_count: <span class="tok-type">usize</span> = unicode.utf8CountCodepoints(str) <span class="tok-kw">catch</span> <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;Invalid UTF-8.&quot;</span>);</span>
<span class="line" id="L410"> <span class="tok-kw">if</span> (cp_count == <span class="tok-number">0</span>) <span class="tok-builtin">@compileError</span>(<span class="tok-str">&quot;No code points?&quot;</span>);</span>
<span class="line" id="L411"> <span class="tok-kw">const</span> tokens = getTokens(str, cp_count);</span>
<span class="line" id="L412"></span>
<span class="line" id="L413"> <span class="tok-kw">return</span> <span class="tok-kw">struct</span> {</span>
<span class="line" id="L414"> bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span> = str,</span>
<span class="line" id="L415"> i: ?<span class="tok-type">usize</span> = <span class="tok-null">null</span>,</span>
<span class="line" id="L416"> start: ?Token = tokens[<span class="tok-number">0</span>],</span>
<span class="line" id="L417"> tokens: [cp_count]Token = tokens,</span>
<span class="line" id="L418"></span>
<span class="line" id="L419"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L420"></span>
<span class="line" id="L421"> <span class="tok-comment">// Main API.</span>
</span>
<span class="line" id="L422"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">next</span>(self: *Self) ?Sentence {</span>
<span class="line" id="L423"> no_break: <span class="tok-kw">while</span> (self.advance()) |current_token| {</span>
<span class="line" id="L424"> <span class="tok-kw">if</span> (isParaSep(current_token)) {</span>
<span class="line" id="L425"> <span class="tok-kw">var</span> end = current_token;</span>
<span class="line" id="L426"></span>
<span class="line" id="L427"> <span class="tok-kw">if</span> (current_token.is(.cr)) {</span>
<span class="line" id="L428"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L429"> <span class="tok-kw">if</span> (p.is(.lf)) {</span>
<span class="line" id="L430"> _ = self.advance();</span>
<span class="line" id="L431"> end = self.current();</span>
<span class="line" id="L432"> }</span>
<span class="line" id="L433"> }</span>
<span class="line" id="L434"> }</span>
<span class="line" id="L435"></span>
<span class="line" id="L436"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L437"> self.start = self.peek();</span>
<span class="line" id="L438"></span>
<span class="line" id="L439"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L440"> }</span>
<span class="line" id="L441"></span>
<span class="line" id="L442"> <span class="tok-kw">if</span> (current_token.is(.aterm)) {</span>
<span class="line" id="L443"> <span class="tok-kw">var</span> end = self.current();</span>
<span class="line" id="L444"></span>
<span class="line" id="L445"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L446"> <span class="tok-kw">if</span> (isUpper(p)) {</span>
<span class="line" id="L447"> <span class="tok-comment">// self.i may not be the same as current token's offset due to ignorable skipping.</span>
</span>
<span class="line" id="L448"> <span class="tok-kw">const</span> original_i = self.i;</span>
<span class="line" id="L449"> self.i = current_token.offset;</span>
<span class="line" id="L450"> <span class="tok-kw">defer</span> self.i = original_i;</span>
<span class="line" id="L451"></span>
<span class="line" id="L452"> <span class="tok-kw">if</span> (self.prevAfterSkip(isIgnorable)) |v| {</span>
<span class="line" id="L453"> <span class="tok-kw">if</span> (isUpperLower(v)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L454"> }</span>
<span class="line" id="L455"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isParaSep(p) <span class="tok-kw">or</span> isLower(p) <span class="tok-kw">or</span> isNumeric(p) <span class="tok-kw">or</span> isSContinue(p)) {</span>
<span class="line" id="L456"> <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L457"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isSpace(p)) {</span>
<span class="line" id="L458"> <span class="tok-comment">// ATerm Sp*</span>
</span>
<span class="line" id="L459"> self.run(isSpace);</span>
<span class="line" id="L460"> end = self.current();</span>
<span class="line" id="L461"> <span class="tok-comment">// Possible lower case after.</span>
</span>
<span class="line" id="L462"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L463"> <span class="tok-kw">if</span> (isLower(pp)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L464"> }</span>
<span class="line" id="L465"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isClose(p)) {</span>
<span class="line" id="L466"> <span class="tok-comment">// ATerm Close*</span>
</span>
<span class="line" id="L467"> self.run(isClose);</span>
<span class="line" id="L468"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L469"> <span class="tok-comment">// Possible ParaSep after.</span>
</span>
<span class="line" id="L470"> <span class="tok-kw">if</span> (isParaSep(pp)) {</span>
<span class="line" id="L471"> _ = self.advance();</span>
<span class="line" id="L472"> end = self.current();</span>
<span class="line" id="L473"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L474"> self.start = self.peek();</span>
<span class="line" id="L475"></span>
<span class="line" id="L476"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L477"> }</span>
<span class="line" id="L478"> <span class="tok-comment">// Possible spaces after.</span>
</span>
<span class="line" id="L479"> <span class="tok-kw">if</span> (isSpace(pp)) {</span>
<span class="line" id="L480"> <span class="tok-comment">// ATerm Close* Sp*</span>
</span>
<span class="line" id="L481"> self.run(isSpace);</span>
<span class="line" id="L482"></span>
<span class="line" id="L483"> <span class="tok-kw">if</span> (self.peek()) |ppp| {</span>
<span class="line" id="L484"> <span class="tok-comment">// Possible lower after.</span>
</span>
<span class="line" id="L485"> <span class="tok-kw">if</span> (isLower(ppp)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L486"> <span class="tok-comment">// Possible lower after some allowed code points.</span>
</span>
<span class="line" id="L487"> <span class="tok-kw">if</span> (isAllowedBeforeLower(ppp)) {</span>
<span class="line" id="L488"> <span class="tok-kw">if</span> (self.peekAfterSkip(isAllowedBeforeLower)) |pppp| {</span>
<span class="line" id="L489"> <span class="tok-comment">// ATerm Close* Sp* !(Unallowed) Lower</span>
</span>
<span class="line" id="L490"> <span class="tok-kw">if</span> (isLower(pppp)) <span class="tok-kw">continue</span> :no_break;</span>
<span class="line" id="L491"> }</span>
<span class="line" id="L492"> }</span>
<span class="line" id="L493"> }</span>
<span class="line" id="L494"> }</span>
<span class="line" id="L495"> }</span>
<span class="line" id="L496"></span>
<span class="line" id="L497"> end = self.current();</span>
<span class="line" id="L498"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isSATerm(p)) {</span>
<span class="line" id="L499"> self.run(isSATerm);</span>
<span class="line" id="L500"> end = self.current();</span>
<span class="line" id="L501"> }</span>
<span class="line" id="L502"> }</span>
<span class="line" id="L503"></span>
<span class="line" id="L504"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L505"> self.start = self.peek();</span>
<span class="line" id="L506"></span>
<span class="line" id="L507"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L508"> }</span>
<span class="line" id="L509"></span>
<span class="line" id="L510"> <span class="tok-kw">if</span> (current_token.is(.sterm)) {</span>
<span class="line" id="L511"> <span class="tok-kw">var</span> end = self.current();</span>
<span class="line" id="L512"></span>
<span class="line" id="L513"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L514"> <span class="tok-kw">if</span> (isParaSep(p) <span class="tok-kw">or</span> isSATerm(p) <span class="tok-kw">or</span> isSContinue(p)) {</span>
<span class="line" id="L515"> _ = self.advance();</span>
<span class="line" id="L516"> end = self.current();</span>
<span class="line" id="L517"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isSpace(p)) {</span>
<span class="line" id="L518"> self.run(isSpace);</span>
<span class="line" id="L519"> end = self.current();</span>
<span class="line" id="L520"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isClose(p)) {</span>
<span class="line" id="L521"> <span class="tok-comment">// STerm Close*</span>
</span>
<span class="line" id="L522"> self.run(isClose);</span>
<span class="line" id="L523"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L524"> <span class="tok-kw">if</span> (isSpace(pp)) {</span>
<span class="line" id="L525"> <span class="tok-comment">// STerm Close* Sp*</span>
</span>
<span class="line" id="L526"> self.run(isSpace);</span>
<span class="line" id="L527"> }</span>
<span class="line" id="L528"> }</span>
<span class="line" id="L529"></span>
<span class="line" id="L530"> end = self.current();</span>
<span class="line" id="L531"> }</span>
<span class="line" id="L532"> }</span>
<span class="line" id="L533"></span>
<span class="line" id="L534"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L535"> self.start = self.peek();</span>
<span class="line" id="L536"></span>
<span class="line" id="L537"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L538"> }</span>
<span class="line" id="L539"> }</span>
<span class="line" id="L540"></span>
<span class="line" id="L541"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (self.start) |start| self.emit(start, self.last()) <span class="tok-kw">else</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L542"> }</span>
<span class="line" id="L543"></span>
<span class="line" id="L544"> <span class="tok-comment">// Token array movement.</span>
</span>
<span class="line" id="L545"> <span class="tok-kw">fn</span> <span class="tok-fn">forward</span>(self: *Self) <span class="tok-type">bool</span> {</span>
<span class="line" id="L546"> <span class="tok-kw">if</span> (self.i) |*index| {</span>
<span class="line" id="L547"> index.* += <span class="tok-number">1</span>;</span>
<span class="line" id="L548"> <span class="tok-kw">if</span> (index.* &gt;= self.tokens.len) <span class="tok-kw">return</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L549"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L550"> self.i = <span class="tok-number">0</span>;</span>
<span class="line" id="L551"> }</span>
<span class="line" id="L552"></span>
<span class="line" id="L553"> <span class="tok-kw">return</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L554"> }</span>
<span class="line" id="L555"></span>
<span class="line" id="L556"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">count</span>(self: *Self) <span class="tok-type">usize</span> {</span>
<span class="line" id="L557"> <span class="tok-kw">const</span> original_i = self.i;</span>
<span class="line" id="L558"> <span class="tok-kw">const</span> original_start = self.start;</span>
<span class="line" id="L559"> <span class="tok-kw">defer</span> {</span>
<span class="line" id="L560"> self.i = original_i;</span>
<span class="line" id="L561"> self.start = original_start;</span>
<span class="line" id="L562"> }</span>
<span class="line" id="L563"></span>
<span class="line" id="L564"> self.rewind();</span>
<span class="line" id="L565"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L566"> <span class="tok-kw">while</span> (self.next()) |_| : (i += <span class="tok-number">1</span>) {}</span>
<span class="line" id="L567"></span>
<span class="line" id="L568"> <span class="tok-kw">return</span> i;</span>
<span class="line" id="L569"> }</span>
<span class="line" id="L570"></span>
<span class="line" id="L571"> <span class="tok-comment">// Token array movement.</span>
</span>
<span class="line" id="L572"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">rewind</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L573"> self.i = <span class="tok-null">null</span>;</span>
<span class="line" id="L574"> self.start = self.tokens[<span class="tok-number">0</span>];</span>
<span class="line" id="L575"> }</span>
<span class="line" id="L576"></span>
<span class="line" id="L577"> <span class="tok-kw">fn</span> <span class="tok-fn">getRelative</span>(self: Self, n: <span class="tok-type">isize</span>) ?Token {</span>
<span class="line" id="L578"> <span class="tok-kw">var</span> index: <span class="tok-type">usize</span> = self.i <span class="tok-kw">orelse</span> <span class="tok-number">0</span>;</span>
<span class="line" id="L579"></span>
<span class="line" id="L580"> <span class="tok-kw">if</span> (n &lt; <span class="tok-number">0</span>) {</span>
<span class="line" id="L581"> <span class="tok-kw">if</span> (index == <span class="tok-number">0</span> <span class="tok-kw">or</span> -%n &gt; index) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L582"> index -= <span class="tok-builtin">@intCast</span>(-%n);</span>
<span class="line" id="L583"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L584"> <span class="tok-kw">const</span> un: <span class="tok-type">usize</span> = <span class="tok-builtin">@intCast</span>(n);</span>
<span class="line" id="L585"> <span class="tok-kw">if</span> (index + un &gt;= self.tokens.len) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L586"> index += un;</span>
<span class="line" id="L587"> }</span>
<span class="line" id="L588"></span>
<span class="line" id="L589"> <span class="tok-kw">return</span> self.tokens[index];</span>
<span class="line" id="L590"> }</span>
<span class="line" id="L591"></span>
<span class="line" id="L592"> <span class="tok-kw">fn</span> <span class="tok-fn">prevAfterSkip</span>(self: *Self, predicate: TokenPredicate) ?Token {</span>
<span class="line" id="L593"> <span class="tok-kw">if</span> (self.i == <span class="tok-null">null</span> <span class="tok-kw">or</span> self.i.? == <span class="tok-number">0</span>) <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L594"></span>
<span class="line" id="L595"> <span class="tok-kw">var</span> i: <span class="tok-type">isize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L596"> <span class="tok-kw">while</span> (self.getRelative(-i)) |token| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L597"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">return</span> token;</span>
<span class="line" id="L598"> }</span>
<span class="line" id="L599"></span>
<span class="line" id="L600"> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L601"> }</span>
<span class="line" id="L602"></span>
<span class="line" id="L603"> <span class="tok-kw">fn</span> <span class="tok-fn">current</span>(self: Self) Token {</span>
<span class="line" id="L604"> <span class="tok-comment">// Assumes self.i is not null.</span>
</span>
<span class="line" id="L605"> <span class="tok-kw">return</span> self.tokens[self.i.?];</span>
<span class="line" id="L606"> }</span>
<span class="line" id="L607"></span>
<span class="line" id="L608"> <span class="tok-kw">fn</span> <span class="tok-fn">last</span>(self: Self) Token {</span>
<span class="line" id="L609"> <span class="tok-kw">return</span> self.tokens[self.tokens.len - <span class="tok-number">1</span>];</span>
<span class="line" id="L610"> }</span>
<span class="line" id="L611"></span>
<span class="line" id="L612"> <span class="tok-kw">fn</span> <span class="tok-fn">peek</span>(self: Self) ?Token {</span>
<span class="line" id="L613"> <span class="tok-kw">return</span> self.getRelative(<span class="tok-number">1</span>);</span>
<span class="line" id="L614"> }</span>
<span class="line" id="L615"></span>
<span class="line" id="L616"> <span class="tok-kw">fn</span> <span class="tok-fn">peekAfterSkip</span>(self: *Self, predicate: TokenPredicate) ?Token {</span>
<span class="line" id="L617"> <span class="tok-kw">var</span> i: <span class="tok-type">isize</span> = <span class="tok-number">1</span>;</span>
<span class="line" id="L618"> <span class="tok-kw">while</span> (self.getRelative(i)) |token| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L619"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">return</span> token;</span>
<span class="line" id="L620"> }</span>
<span class="line" id="L621"></span>
<span class="line" id="L622"> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L623"> }</span>
<span class="line" id="L624"></span>
<span class="line" id="L625"> <span class="tok-kw">fn</span> <span class="tok-fn">advance</span>(self: *Self) ?Token {</span>
<span class="line" id="L626"> <span class="tok-kw">const</span> token = <span class="tok-kw">if</span> (self.forward()) self.current() <span class="tok-kw">else</span> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L627"> <span class="tok-kw">if</span> (!isParaSep(token)) _ = self.skipIgnorables(token);</span>
<span class="line" id="L628"></span>
<span class="line" id="L629"> <span class="tok-kw">return</span> token;</span>
<span class="line" id="L630"> }</span>
<span class="line" id="L631"></span>
<span class="line" id="L632"> <span class="tok-kw">fn</span> <span class="tok-fn">run</span>(self: *Self, predicate: TokenPredicate) <span class="tok-type">void</span> {</span>
<span class="line" id="L633"> <span class="tok-kw">while</span> (self.peek()) |token| {</span>
<span class="line" id="L634"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">break</span>;</span>
<span class="line" id="L635"> _ = self.advance();</span>
<span class="line" id="L636"> }</span>
<span class="line" id="L637"> }</span>
<span class="line" id="L638"></span>
<span class="line" id="L639"> <span class="tok-kw">fn</span> <span class="tok-fn">skipIgnorables</span>(self: *Self, end: Token) Token {</span>
<span class="line" id="L640"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L641"> <span class="tok-kw">if</span> (isIgnorable(p)) {</span>
<span class="line" id="L642"> self.run(isIgnorable);</span>
<span class="line" id="L643"> <span class="tok-kw">return</span> self.current();</span>
<span class="line" id="L644"> }</span>
<span class="line" id="L645"> }</span>
<span class="line" id="L646"></span>
<span class="line" id="L647"> <span class="tok-kw">return</span> end;</span>
<span class="line" id="L648"> }</span>
<span class="line" id="L649"></span>
<span class="line" id="L650"> <span class="tok-comment">// Production.</span>
</span>
<span class="line" id="L651"> <span class="tok-kw">fn</span> <span class="tok-fn">emit</span>(self: Self, start_token: Token, end_token: Token) Sentence {</span>
<span class="line" id="L652"> <span class="tok-kw">const</span> start = start_token.code_point.offset;</span>
<span class="line" id="L653"> <span class="tok-kw">const</span> end = end_token.code_point.offset + end_token.code_point.len;</span>
<span class="line" id="L654"></span>
<span class="line" id="L655"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L656"> .bytes = self.bytes[start..end],</span>
<span class="line" id="L657"> .offset = start,</span>
<span class="line" id="L658"> };</span>
<span class="line" id="L659"> }</span>
<span class="line" id="L660"> };</span>
<span class="line" id="L661">}</span>
<span class="line" id="L662"></span>
<span class="line" id="L663"><span class="tok-kw">test</span> <span class="tok-str">&quot;Segmentation ComptimeSentenceIterator&quot;</span> {</span>
<span class="line" id="L664"> <span class="tok-builtin">@setEvalBranchQuota</span>(<span class="tok-number">2_000</span>);</span>
<span class="line" id="L665"></span>
<span class="line" id="L666"> <span class="tok-kw">const</span> input =</span>
<span class="line" id="L667"> <span class="tok-str">\\(&quot;Go.&quot;) (&quot;He said.&quot;)</span></span>
<span class="line" id="L668"> ;</span>
<span class="line" id="L669"> <span class="tok-kw">comptime</span> <span class="tok-kw">var</span> ct_iter = ComptimeSentenceIterator(input){};</span>
<span class="line" id="L670"> <span class="tok-kw">const</span> n = <span class="tok-kw">comptime</span> ct_iter.count();</span>
<span class="line" id="L671"> <span class="tok-kw">comptime</span> <span class="tok-kw">var</span> sentences: [n]Sentence = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L672"> <span class="tok-kw">comptime</span> {</span>
<span class="line" id="L673"> <span class="tok-kw">var</span> i: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L674"> <span class="tok-kw">while</span> (ct_iter.next()) |sentence| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L675"> sentences[i] = sentence;</span>
<span class="line" id="L676"> }</span>
<span class="line" id="L677"> }</span>
<span class="line" id="L678"></span>
<span class="line" id="L679"> <span class="tok-kw">const</span> s1 =</span>
<span class="line" id="L680"> <span class="tok-str">\\(&quot;Go.&quot;) </span></span>
<span class="line" id="L681"> ;</span>
<span class="line" id="L682"> <span class="tok-kw">const</span> s2 =</span>
<span class="line" id="L683"> <span class="tok-str">\\(&quot;He said.&quot;)</span></span>
<span class="line" id="L684"> ;</span>
<span class="line" id="L685"> <span class="tok-kw">const</span> want = &amp;[_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ s1, s2 };</span>
<span class="line" id="L686"></span>
<span class="line" id="L687"> <span class="tok-kw">for</span> (sentences, <span class="tok-number">0</span>..) |sentence, i| {</span>
<span class="line" id="L688"> <span class="tok-kw">try</span> std.testing.expect(sentence.eql(want[i]));</span>
<span class="line" id="L689"> }</span>
<span class="line" id="L690">}</span>
<span class="line" id="L691"></span>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `Word` represents a single word within a UTF-8 encoded string by its bytes and offset.</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> unicode = std.unicode;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-kw">const</span> wbp = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/word_break_property.zig&quot;</span>);</span>
<span class="line" id="L7"><span class="tok-kw">const</span> CodePoint = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;CodePoint.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">const</span> CodePointIterator = CodePoint.CodePointIterator;</span>
<span class="line" id="L9"><span class="tok-kw">const</span> emoji = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;../autogen/emoji_data.zig&quot;</span>);</span>
<span class="line" id="L10"></span>
<span class="line" id="L11"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Word = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L12"></span>
<span class="line" id="L13">bytes: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>,</span>
<span class="line" id="L14">offset: <span class="tok-type">usize</span>,</span>
<span class="line" id="L15"></span>
<span class="line" id="L16"><span class="tok-comment">/// `eal` compares `str` with the bytes of this word for equality.</span></span>
<span class="line" id="L17"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">eql</span>(self: Word, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L18"> <span class="tok-kw">return</span> std.mem.eql(<span class="tok-type">u8</span>, self.bytes, str);</span>
<span class="line" id="L19">}</span>
<span class="line" id="L20"></span>
<span class="line" id="L21"><span class="tok-kw">const</span> Type = <span class="tok-kw">enum</span> {</span>
<span class="line" id="L22"> aletter,</span>
<span class="line" id="L23"> cr,</span>
<span class="line" id="L24"> dquote,</span>
<span class="line" id="L25"> extend,</span>
<span class="line" id="L26"> extendnumlet,</span>
<span class="line" id="L27"> format,</span>
<span class="line" id="L28"> hletter,</span>
<span class="line" id="L29"> katakana,</span>
<span class="line" id="L30"> lf,</span>
<span class="line" id="L31"> midletter,</span>
<span class="line" id="L32"> midnum,</span>
<span class="line" id="L33"> midnumlet,</span>
<span class="line" id="L34"> newline,</span>
<span class="line" id="L35"> numeric,</span>
<span class="line" id="L36"> regional,</span>
<span class="line" id="L37"> squote,</span>
<span class="line" id="L38"> wsegspace,</span>
<span class="line" id="L39"> xpic,</span>
<span class="line" id="L40"> zwj,</span>
<span class="line" id="L41"> any,</span>
<span class="line" id="L42"></span>
<span class="line" id="L43"> <span class="tok-kw">fn</span> <span class="tok-fn">get</span>(cp: CodePoint) Type {</span>
<span class="line" id="L44"> <span class="tok-kw">var</span> ty: Type = .any;</span>
<span class="line" id="L45"> <span class="tok-kw">if</span> (<span class="tok-number">0x000D</span> == cp.code) ty = .cr;</span>
<span class="line" id="L46"> <span class="tok-kw">if</span> (<span class="tok-number">0x000A</span> == cp.code) ty = .lf;</span>
<span class="line" id="L47"> <span class="tok-kw">if</span> (<span class="tok-number">0x200D</span> == cp.code) ty = .zwj;</span>
<span class="line" id="L48"> <span class="tok-kw">if</span> (<span class="tok-number">0x0022</span> == cp.code) ty = .dquote;</span>
<span class="line" id="L49"> <span class="tok-kw">if</span> (<span class="tok-number">0x0027</span> == cp.code) ty = .squote;</span>
<span class="line" id="L50"> <span class="tok-kw">if</span> (wbp.isAletter(cp.code)) ty = .aletter;</span>
<span class="line" id="L51"> <span class="tok-kw">if</span> (wbp.isExtend(cp.code)) ty = .extend;</span>
<span class="line" id="L52"> <span class="tok-kw">if</span> (wbp.isExtendnumlet(cp.code)) ty = .extendnumlet;</span>
<span class="line" id="L53"> <span class="tok-kw">if</span> (wbp.isFormat(cp.code)) ty = .format;</span>
<span class="line" id="L54"> <span class="tok-kw">if</span> (wbp.isHebrewLetter(cp.code)) ty = .hletter;</span>
<span class="line" id="L55"> <span class="tok-kw">if</span> (wbp.isKatakana(cp.code)) ty = .katakana;</span>
<span class="line" id="L56"> <span class="tok-kw">if</span> (wbp.isMidletter(cp.code)) ty = .midletter;</span>
<span class="line" id="L57"> <span class="tok-kw">if</span> (wbp.isMidnum(cp.code)) ty = .midnum;</span>
<span class="line" id="L58"> <span class="tok-kw">if</span> (wbp.isMidnumlet(cp.code)) ty = .midnumlet;</span>
<span class="line" id="L59"> <span class="tok-kw">if</span> (wbp.isNewline(cp.code)) ty = .newline;</span>
<span class="line" id="L60"> <span class="tok-kw">if</span> (wbp.isNumeric(cp.code)) ty = .numeric;</span>
<span class="line" id="L61"> <span class="tok-kw">if</span> (wbp.isRegionalIndicator(cp.code)) ty = .regional;</span>
<span class="line" id="L62"> <span class="tok-kw">if</span> (wbp.isWsegspace(cp.code)) ty = .wsegspace;</span>
<span class="line" id="L63"> <span class="tok-kw">if</span> (emoji.isExtendedPictographic(cp.code)) ty = .xpic;</span>
<span class="line" id="L64"></span>
<span class="line" id="L65"> <span class="tok-kw">return</span> ty;</span>
<span class="line" id="L66"> }</span>
<span class="line" id="L67">};</span>
<span class="line" id="L68"></span>
<span class="line" id="L69"><span class="tok-kw">const</span> Token = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L70"> ty: Type,</span>
<span class="line" id="L71"> code_point: CodePoint,</span>
<span class="line" id="L72"></span>
<span class="line" id="L73"> <span class="tok-kw">fn</span> <span class="tok-fn">is</span>(self: Token, ty: Type) <span class="tok-type">bool</span> {</span>
<span class="line" id="L74"> <span class="tok-kw">return</span> self.ty == ty;</span>
<span class="line" id="L75"> }</span>
<span class="line" id="L76">};</span>
<span class="line" id="L77"></span>
<span class="line" id="L78"><span class="tok-comment">/// `WordIterator` iterates a Unicode string one word at-a-time. Note that whitespace and punctuation appear as separate</span></span>
<span class="line" id="L79"><span class="tok-comment">/// elements in the iteration.</span></span>
<span class="line" id="L80"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> WordIterator = <span class="tok-kw">struct</span> {</span>
<span class="line" id="L81"> cp_iter: CodePointIterator,</span>
<span class="line" id="L82"> current: ?Token = <span class="tok-null">null</span>,</span>
<span class="line" id="L83"> start: ?Token = <span class="tok-null">null</span>,</span>
<span class="line" id="L84"></span>
<span class="line" id="L85"> <span class="tok-kw">const</span> Self = <span class="tok-builtin">@This</span>();</span>
<span class="line" id="L86"></span>
<span class="line" id="L87"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">init</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) !Self {</span>
<span class="line" id="L88"> <span class="tok-kw">if</span> (!unicode.utf8ValidateSlice(str)) <span class="tok-kw">return</span> <span class="tok-kw">error</span>.InvalidUtf8;</span>
<span class="line" id="L89"> <span class="tok-kw">return</span> Self{ .cp_iter = CodePointIterator{ .bytes = str } };</span>
<span class="line" id="L90"> }</span>
<span class="line" id="L91"></span>
<span class="line" id="L92"> <span class="tok-comment">// Main API.</span>
</span>
<span class="line" id="L93"> <span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">next</span>(self: *Self) ?Word {</span>
<span class="line" id="L94"> <span class="tok-kw">if</span> (self.advance()) |latest_non_ignorable| {</span>
<span class="line" id="L95"> <span class="tok-kw">var</span> end = self.current.?;</span>
<span class="line" id="L96"> <span class="tok-kw">var</span> done = <span class="tok-null">false</span>;</span>
<span class="line" id="L97"></span>
<span class="line" id="L98"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> isBreaker(latest_non_ignorable)) {</span>
<span class="line" id="L99"> <span class="tok-kw">if</span> (latest_non_ignorable.is(.cr)) {</span>
<span class="line" id="L100"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L101"> <span class="tok-comment">// WB</span>
</span>
<span class="line" id="L102"> <span class="tok-kw">if</span> (p.is(.lf)) {</span>
<span class="line" id="L103"> _ = self.advance();</span>
<span class="line" id="L104"> end = self.current.?;</span>
<span class="line" id="L105"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L106"> }</span>
<span class="line" id="L107"> }</span>
<span class="line" id="L108"> }</span>
<span class="line" id="L109"> }</span>
<span class="line" id="L110"></span>
<span class="line" id="L111"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> end.is(.zwj)) {</span>
<span class="line" id="L112"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L113"> <span class="tok-comment">// WB3c</span>
</span>
<span class="line" id="L114"> <span class="tok-kw">if</span> (p.is(.xpic)) {</span>
<span class="line" id="L115"> _ = self.advance();</span>
<span class="line" id="L116"> end = self.current.?;</span>
<span class="line" id="L117"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L118"> }</span>
<span class="line" id="L119"> }</span>
<span class="line" id="L120"> }</span>
<span class="line" id="L121"></span>
<span class="line" id="L122"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.wsegspace)) {</span>
<span class="line" id="L123"> <span class="tok-kw">while</span> (self.peek()) |p| {</span>
<span class="line" id="L124"> <span class="tok-comment">// WB3d</span>
</span>
<span class="line" id="L125"> <span class="tok-kw">if</span> (p.is(.wsegspace) <span class="tok-kw">and</span> !isIgnorable(end)) {</span>
<span class="line" id="L126"> _ = self.advance();</span>
<span class="line" id="L127"> end = self.current.?;</span>
<span class="line" id="L128"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L129"> } <span class="tok-kw">else</span> <span class="tok-kw">break</span>;</span>
<span class="line" id="L130"> }</span>
<span class="line" id="L131"> }</span>
<span class="line" id="L132"></span>
<span class="line" id="L133"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> (isAHLetter(latest_non_ignorable) <span class="tok-kw">or</span> latest_non_ignorable.is(.numeric))) {</span>
<span class="line" id="L134"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L135"> <span class="tok-comment">// WB5, WB8, WB9, WB10</span>
</span>
<span class="line" id="L136"> <span class="tok-kw">if</span> (isAHLetter(p) <span class="tok-kw">or</span> p.is(.numeric)) {</span>
<span class="line" id="L137"> self.run(isAlphaNum);</span>
<span class="line" id="L138"> end = self.current.?;</span>
<span class="line" id="L139"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L140"> }</span>
<span class="line" id="L141"> }</span>
<span class="line" id="L142"> }</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> isAHLetter(latest_non_ignorable)) {</span>
<span class="line" id="L145"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L146"> <span class="tok-comment">// WB6, WB7</span>
</span>
<span class="line" id="L147"> <span class="tok-kw">if</span> (p.is(.midletter) <span class="tok-kw">or</span> isMidNumLetQ(p)) {</span>
<span class="line" id="L148"> <span class="tok-comment">// Save state</span>
</span>
<span class="line" id="L149"> <span class="tok-kw">const</span> saved_i = self.cp_iter.i;</span>
<span class="line" id="L150"> <span class="tok-kw">const</span> saved_current = self.current;</span>
<span class="line" id="L151"> <span class="tok-kw">const</span> saved_start = self.start;</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"> _ = self.advance(); <span class="tok-comment">// (MidLetter|MidNumLetQ)</span>
</span>
<span class="line" id="L154"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L155"> <span class="tok-kw">if</span> (isAHLetter(pp)) {</span>
<span class="line" id="L156"> _ = self.advance(); <span class="tok-comment">// AHLetter</span>
</span>
<span class="line" id="L157"> end = self.current.?;</span>
<span class="line" id="L158"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L159"> }</span>
<span class="line" id="L160"> }</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"> <span class="tok-kw">if</span> (!done) {</span>
<span class="line" id="L163"> <span class="tok-comment">// Restore state</span>
</span>
<span class="line" id="L164"> self.cp_iter.i = saved_i;</span>
<span class="line" id="L165"> self.current = saved_current;</span>
<span class="line" id="L166"> self.start = saved_start;</span>
<span class="line" id="L167"> }</span>
<span class="line" id="L168"> }</span>
<span class="line" id="L169"> }</span>
<span class="line" id="L170"> }</span>
<span class="line" id="L171"></span>
<span class="line" id="L172"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.hletter)) {</span>
<span class="line" id="L173"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L174"> <span class="tok-comment">// WB7a</span>
</span>
<span class="line" id="L175"> <span class="tok-kw">if</span> (p.is(.squote)) {</span>
<span class="line" id="L176"> _ = self.advance();</span>
<span class="line" id="L177"> end = self.current.?;</span>
<span class="line" id="L178"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L179"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (p.is(.dquote)) {</span>
<span class="line" id="L180"> <span class="tok-comment">// WB7b, WB7c</span>
</span>
<span class="line" id="L181"> <span class="tok-comment">// Save state</span>
</span>
<span class="line" id="L182"> <span class="tok-kw">const</span> saved_i = self.cp_iter.i;</span>
<span class="line" id="L183"> <span class="tok-kw">const</span> saved_current = self.current;</span>
<span class="line" id="L184"> <span class="tok-kw">const</span> saved_start = self.start;</span>
<span class="line" id="L185"></span>
<span class="line" id="L186"> _ = self.advance(); <span class="tok-comment">// Double_Quote</span>
</span>
<span class="line" id="L187"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L188"> <span class="tok-kw">if</span> (pp.is(.hletter)) {</span>
<span class="line" id="L189"> _ = self.advance(); <span class="tok-comment">// Hebrew_Letter</span>
</span>
<span class="line" id="L190"> end = self.current.?;</span>
<span class="line" id="L191"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L192"> }</span>
<span class="line" id="L193"> }</span>
<span class="line" id="L194"></span>
<span class="line" id="L195"> <span class="tok-kw">if</span> (!done) {</span>
<span class="line" id="L196"> <span class="tok-comment">// Restore state</span>
</span>
<span class="line" id="L197"> self.cp_iter.i = saved_i;</span>
<span class="line" id="L198"> self.current = saved_current;</span>
<span class="line" id="L199"> self.start = saved_start;</span>
<span class="line" id="L200"> }</span>
<span class="line" id="L201"> }</span>
<span class="line" id="L202"> }</span>
<span class="line" id="L203"> }</span>
<span class="line" id="L204"></span>
<span class="line" id="L205"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.numeric)) {</span>
<span class="line" id="L206"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L207"> <span class="tok-kw">if</span> (p.is(.midnum) <span class="tok-kw">or</span> isMidNumLetQ(p)) {</span>
<span class="line" id="L208"> <span class="tok-comment">// WB11, WB12</span>
</span>
<span class="line" id="L209"> <span class="tok-comment">// Save state</span>
</span>
<span class="line" id="L210"> <span class="tok-kw">const</span> saved_i = self.cp_iter.i;</span>
<span class="line" id="L211"> <span class="tok-kw">const</span> saved_current = self.current;</span>
<span class="line" id="L212"> <span class="tok-kw">const</span> saved_start = self.start;</span>
<span class="line" id="L213"></span>
<span class="line" id="L214"> _ = self.advance(); <span class="tok-comment">// (MidNum|MidNumLetQ)</span>
</span>
<span class="line" id="L215"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L216"> <span class="tok-kw">if</span> (pp.is(.numeric)) {</span>
<span class="line" id="L217"> _ = self.advance(); <span class="tok-comment">// Numeric</span>
</span>
<span class="line" id="L218"> end = self.current.?;</span>
<span class="line" id="L219"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L220"> }</span>
<span class="line" id="L221"> }</span>
<span class="line" id="L222"></span>
<span class="line" id="L223"> <span class="tok-kw">if</span> (!done) {</span>
<span class="line" id="L224"> <span class="tok-comment">// Restore state</span>
</span>
<span class="line" id="L225"> self.cp_iter.i = saved_i;</span>
<span class="line" id="L226"> self.current = saved_current;</span>
<span class="line" id="L227"> self.start = saved_start;</span>
<span class="line" id="L228"> }</span>
<span class="line" id="L229"> }</span>
<span class="line" id="L230"> }</span>
<span class="line" id="L231"> }</span>
<span class="line" id="L232"></span>
<span class="line" id="L233"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> (isAHLetter(latest_non_ignorable) <span class="tok-kw">or</span> latest_non_ignorable.is(.numeric) <span class="tok-kw">or</span> latest_non_ignorable.is(.katakana) <span class="tok-kw">or</span></span>
<span class="line" id="L234"> latest_non_ignorable.is(.extendnumlet)))</span>
<span class="line" id="L235"> {</span>
<span class="line" id="L236"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L237"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L238"> <span class="tok-comment">// WB13a</span>
</span>
<span class="line" id="L239"> <span class="tok-kw">if</span> (p.is(.extendnumlet)) {</span>
<span class="line" id="L240"> _ = self.advance(); <span class="tok-comment">// ExtendNumLet</span>
</span>
<span class="line" id="L241"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L242"> <span class="tok-kw">if</span> (isAHLetter(pp) <span class="tok-kw">or</span> isNumeric(pp) <span class="tok-kw">or</span> pp.is(.katakana)) {</span>
<span class="line" id="L243"> <span class="tok-comment">// WB13b</span>
</span>
<span class="line" id="L244"> _ = self.advance(); <span class="tok-comment">// (AHLetter|Numeric|Katakana)</span>
</span>
<span class="line" id="L245"> }</span>
<span class="line" id="L246"> }</span>
<span class="line" id="L247"> end = self.current.?;</span>
<span class="line" id="L248"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L249"> } <span class="tok-kw">else</span> <span class="tok-kw">break</span>;</span>
<span class="line" id="L250"> } <span class="tok-kw">else</span> <span class="tok-kw">break</span>;</span>
<span class="line" id="L251"> }</span>
<span class="line" id="L252"> }</span>
<span class="line" id="L253"></span>
<span class="line" id="L254"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.extendnumlet)) {</span>
<span class="line" id="L255"> <span class="tok-kw">while</span> (<span class="tok-null">true</span>) {</span>
<span class="line" id="L256"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L257"> <span class="tok-comment">// WB13b</span>
</span>
<span class="line" id="L258"> <span class="tok-kw">if</span> (isAHLetter(p) <span class="tok-kw">or</span> p.is(.numeric) <span class="tok-kw">or</span> p.is(.katakana)) {</span>
<span class="line" id="L259"> _ = self.advance(); <span class="tok-comment">// (AHLetter|Numeric|Katakana)</span>
</span>
<span class="line" id="L260"> end = self.current.?;</span>
<span class="line" id="L261"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L262"></span>
<span class="line" id="L263"> <span class="tok-kw">if</span> (self.peek()) |pp| {</span>
<span class="line" id="L264"> <span class="tok-comment">// Chain.</span>
</span>
<span class="line" id="L265"> <span class="tok-kw">if</span> (pp.is(.extendnumlet)) {</span>
<span class="line" id="L266"> _ = self.advance(); <span class="tok-comment">// ExtendNumLet</span>
</span>
<span class="line" id="L267"> <span class="tok-kw">continue</span>;</span>
<span class="line" id="L268"> }</span>
<span class="line" id="L269"> }</span>
<span class="line" id="L270"> } <span class="tok-kw">else</span> <span class="tok-kw">break</span>;</span>
<span class="line" id="L271"> } <span class="tok-kw">else</span> <span class="tok-kw">break</span>;</span>
<span class="line" id="L272"> }</span>
<span class="line" id="L273"> }</span>
<span class="line" id="L274"></span>
<span class="line" id="L275"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.katakana)) {</span>
<span class="line" id="L276"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L277"> <span class="tok-comment">// WB13</span>
</span>
<span class="line" id="L278"> <span class="tok-kw">if</span> (p.is(.katakana)) {</span>
<span class="line" id="L279"> _ = self.advance();</span>
<span class="line" id="L280"> end = self.current.?;</span>
<span class="line" id="L281"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L282"> }</span>
<span class="line" id="L283"> }</span>
<span class="line" id="L284"> }</span>
<span class="line" id="L285"></span>
<span class="line" id="L286"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.regional)) {</span>
<span class="line" id="L287"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L288"> <span class="tok-comment">// WB</span>
</span>
<span class="line" id="L289"> <span class="tok-kw">if</span> (p.is(.regional)) {</span>
<span class="line" id="L290"> _ = self.advance();</span>
<span class="line" id="L291"> end = self.current.?;</span>
<span class="line" id="L292"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L293"> }</span>
<span class="line" id="L294"> }</span>
<span class="line" id="L295"> }</span>
<span class="line" id="L296"></span>
<span class="line" id="L297"> <span class="tok-kw">if</span> (!done <span class="tok-kw">and</span> latest_non_ignorable.is(.xpic)) {</span>
<span class="line" id="L298"> <span class="tok-kw">if</span> (self.peek()) |p| {</span>
<span class="line" id="L299"> <span class="tok-comment">// WB</span>
</span>
<span class="line" id="L300"> <span class="tok-kw">if</span> (p.is(.xpic) <span class="tok-kw">and</span> end.is(.zwj)) {</span>
<span class="line" id="L301"> _ = self.advance();</span>
<span class="line" id="L302"> end = self.current.?;</span>
<span class="line" id="L303"> done = <span class="tok-null">true</span>;</span>
<span class="line" id="L304"> }</span>
<span class="line" id="L305"> }</span>
<span class="line" id="L306"> }</span>
<span class="line" id="L307"></span>
<span class="line" id="L308"> <span class="tok-kw">const</span> start = self.start.?;</span>
<span class="line" id="L309"> self.start = self.peek();</span>
<span class="line" id="L310"></span>
<span class="line" id="L311"> <span class="tok-comment">// WB</span>
</span>
<span class="line" id="L312"> <span class="tok-kw">return</span> self.emit(start, end);</span>
<span class="line" id="L313"> }</span>
<span class="line" id="L314"></span>
<span class="line" id="L315"> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L316"> }</span>
<span class="line" id="L317"></span>
<span class="line" id="L318"> <span class="tok-kw">fn</span> <span class="tok-fn">peek</span>(self: *Self) ?Token {</span>
<span class="line" id="L319"> <span class="tok-kw">const</span> saved_i = self.cp_iter.i;</span>
<span class="line" id="L320"> <span class="tok-kw">defer</span> self.cp_iter.i = saved_i;</span>
<span class="line" id="L321"></span>
<span class="line" id="L322"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (self.cp_iter.next()) |cp| Token{</span>
<span class="line" id="L323"> .ty = Type.get(cp),</span>
<span class="line" id="L324"> .code_point = cp,</span>
<span class="line" id="L325"> } <span class="tok-kw">else</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L326"> }</span>
<span class="line" id="L327"></span>
<span class="line" id="L328"> <span class="tok-kw">fn</span> <span class="tok-fn">advance</span>(self: *Self) ?Token {</span>
<span class="line" id="L329"> <span class="tok-kw">const</span> latest_non_ignorable = <span class="tok-kw">if</span> (self.cp_iter.next()) |cp| Token{</span>
<span class="line" id="L330"> .ty = Type.get(cp),</span>
<span class="line" id="L331"> .code_point = cp,</span>
<span class="line" id="L332"> } <span class="tok-kw">else</span> <span class="tok-kw">return</span> <span class="tok-null">null</span>;</span>
<span class="line" id="L333"></span>
<span class="line" id="L334"> self.current = latest_non_ignorable;</span>
<span class="line" id="L335"> <span class="tok-kw">if</span> (self.start == <span class="tok-null">null</span>) self.start = latest_non_ignorable; <span class="tok-comment">// Happens only at beginning.</span>
</span>
<span class="line" id="L336"></span>
<span class="line" id="L337"> <span class="tok-comment">// WB3a, WB3b</span>
</span>
<span class="line" id="L338"> <span class="tok-kw">if</span> (!isBreaker(latest_non_ignorable)) self.skipIgnorables();</span>
<span class="line" id="L339"></span>
<span class="line" id="L340"> <span class="tok-kw">return</span> latest_non_ignorable;</span>
<span class="line" id="L341"> }</span>
<span class="line" id="L342"></span>
<span class="line" id="L343"> <span class="tok-kw">fn</span> <span class="tok-fn">run</span>(self: *Self, predicate: TokenPredicate) <span class="tok-type">void</span> {</span>
<span class="line" id="L344"> <span class="tok-kw">while</span> (self.peek()) |token| {</span>
<span class="line" id="L345"> <span class="tok-kw">if</span> (!predicate(token)) <span class="tok-kw">break</span>;</span>
<span class="line" id="L346"> _ = self.advance();</span>
<span class="line" id="L347"> }</span>
<span class="line" id="L348"> }</span>
<span class="line" id="L349"></span>
<span class="line" id="L350"> <span class="tok-kw">fn</span> <span class="tok-fn">skipIgnorables</span>(self: *Self) <span class="tok-type">void</span> {</span>
<span class="line" id="L351"> <span class="tok-kw">while</span> (self.peek()) |peek_token| {</span>
<span class="line" id="L352"> <span class="tok-kw">if</span> (!isIgnorable(peek_token)) <span class="tok-kw">break</span>;</span>
<span class="line" id="L353"> _ = self.advance();</span>
<span class="line" id="L354"> }</span>
<span class="line" id="L355"> }</span>
<span class="line" id="L356"></span>
<span class="line" id="L357"> <span class="tok-comment">// Production.</span>
</span>
<span class="line" id="L358"> <span class="tok-kw">fn</span> <span class="tok-fn">emit</span>(self: Self, start_token: Token, end_token: Token) Word {</span>
<span class="line" id="L359"> <span class="tok-kw">const</span> start = start_token.code_point.offset;</span>
<span class="line" id="L360"> <span class="tok-kw">const</span> end = end_token.code_point.offset + end_token.code_point.len;</span>
<span class="line" id="L361"></span>
<span class="line" id="L362"> <span class="tok-kw">return</span> .{</span>
<span class="line" id="L363"> .bytes = self.cp_iter.bytes[start..end],</span>
<span class="line" id="L364"> .offset = start,</span>
<span class="line" id="L365"> };</span>
<span class="line" id="L366"> }</span>
<span class="line" id="L367">};</span>
<span class="line" id="L368"></span>
<span class="line" id="L369"><span class="tok-comment">// Predicates</span>
</span>
<span class="line" id="L370"><span class="tok-kw">const</span> TokenPredicate = *<span class="tok-kw">const</span> <span class="tok-kw">fn</span> (Token) <span class="tok-type">bool</span>;</span>
<span class="line" id="L371"></span>
<span class="line" id="L372"><span class="tok-kw">fn</span> <span class="tok-fn">isAHLetter</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L373"> <span class="tok-kw">return</span> token.ty == .aletter <span class="tok-kw">or</span> token.ty == .hletter;</span>
<span class="line" id="L374">}</span>
<span class="line" id="L375"></span>
<span class="line" id="L376"><span class="tok-kw">fn</span> <span class="tok-fn">isAlphaNum</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L377"> <span class="tok-kw">return</span> isAHLetter(token) <span class="tok-kw">or</span> isNumeric(token);</span>
<span class="line" id="L378">}</span>
<span class="line" id="L379"></span>
<span class="line" id="L380"><span class="tok-kw">fn</span> <span class="tok-fn">isBreaker</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L381"> <span class="tok-kw">return</span> token.ty == .newline <span class="tok-kw">or</span> token.ty == .cr <span class="tok-kw">or</span> token.ty == .lf;</span>
<span class="line" id="L382">}</span>
<span class="line" id="L383"></span>
<span class="line" id="L384"><span class="tok-kw">fn</span> <span class="tok-fn">isIgnorable</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L385"> <span class="tok-kw">return</span> token.ty == .extend <span class="tok-kw">or</span> token.ty == .format <span class="tok-kw">or</span> token.ty == .zwj;</span>
<span class="line" id="L386">}</span>
<span class="line" id="L387"></span>
<span class="line" id="L388"><span class="tok-kw">fn</span> <span class="tok-fn">isMidNumLetQ</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L389"> <span class="tok-kw">return</span> token.ty == .midnumlet <span class="tok-kw">or</span> token.ty == .squote;</span>
<span class="line" id="L390">}</span>
<span class="line" id="L391"></span>
<span class="line" id="L392"><span class="tok-kw">fn</span> <span class="tok-fn">isNumeric</span>(token: Token) <span class="tok-type">bool</span> {</span>
<span class="line" id="L393"> <span class="tok-kw">return</span> token.ty == .numeric;</span>
<span class="line" id="L394">}</span>
<span class="line" id="L395"></span>
<span class="line" id="L396"><span class="tok-kw">test</span> <span class="tok-str">&quot;Segmentation comptime WordIterator&quot;</span> {</span>
<span class="line" id="L397"> <span class="tok-kw">const</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot;Hello&quot;</span>, <span class="tok-str">&quot; &quot;</span>, <span class="tok-str">&quot;World&quot;</span> };</span>
<span class="line" id="L398"></span>
<span class="line" id="L399"> <span class="tok-kw">comptime</span> {</span>
<span class="line" id="L400"> <span class="tok-kw">var</span> ct_iter = <span class="tok-kw">try</span> WordIterator.init(<span class="tok-str">&quot;Hello World&quot;</span>);</span>
<span class="line" id="L401"> <span class="tok-kw">var</span> i = <span class="tok-number">0</span>;</span>
<span class="line" id="L402"> <span class="tok-kw">while</span> (ct_iter.next()) |word| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L403"> <span class="tok-kw">try</span> std.testing.expect(word.eql(want[i]));</span>
<span class="line" id="L404"> }</span>
<span class="line" id="L405"> }</span>
<span class="line" id="L406">}</span>
<span class="line" id="L407"></span>
<span class="line" id="L408"><span class="tok-kw">test</span> <span class="tok-str">&quot;WB3d - Keep horizontal whitespace together.&quot;</span> {</span>
<span class="line" id="L409"> <span class="tok-kw">const</span> want = [_][]<span class="tok-kw">const</span> <span class="tok-type">u8</span>{ <span class="tok-str">&quot; &quot;</span>, <span class="tok-str">&quot;Hello&quot;</span>, <span class="tok-str">&quot; &quot;</span>, <span class="tok-str">&quot;World&quot;</span>, <span class="tok-str">&quot; &quot;</span> };</span>
<span class="line" id="L410"></span>
<span class="line" id="L411"> <span class="tok-kw">comptime</span> {</span>
<span class="line" id="L412"> <span class="tok-kw">var</span> ct_iter = <span class="tok-kw">try</span> WordIterator.init(<span class="tok-str">&quot; Hello World &quot;</span>);</span>
<span class="line" id="L413"> <span class="tok-kw">var</span> i = <span class="tok-number">0</span>;</span>
<span class="line" id="L414"> <span class="tok-kw">while</span> (ct_iter.next()) |word| : (i += <span class="tok-number">1</span>) {</span>
<span class="line" id="L415"> <span class="tok-kw">try</span> std.testing.expect(word.eql(want[i]));</span>
<span class="line" id="L416"> }</span>
<span class="line" id="L417"> }</span>
<span class="line" id="L418">}</span>
<span class="line" id="L419"></span>
</code></pre></body>
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<pre><code><span class="line" id="L1"><span class="tok-comment">//! `ziglyph` is a Unicode text processing library for the Zig Programming Language.</span></span>
<span class="line" id="L2"></span>
<span class="line" id="L3"><span class="tok-kw">const</span> std = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;std&quot;</span>);</span>
<span class="line" id="L4"><span class="tok-kw">const</span> unicode = std.unicode;</span>
<span class="line" id="L5"></span>
<span class="line" id="L6"><span class="tok-comment">// Functionality by popular Unicode General Category.</span>
</span>
<span class="line" id="L7"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> letter = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;category/letter.zig&quot;</span>);</span>
<span class="line" id="L8"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> mark = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;category/mark.zig&quot;</span>);</span>
<span class="line" id="L9"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> number = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;category/number.zig&quot;</span>);</span>
<span class="line" id="L10"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> punct = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;category/punct.zig&quot;</span>);</span>
<span class="line" id="L11"></span>
<span class="line" id="L12"><span class="tok-comment">// Display width calculation.</span>
</span>
<span class="line" id="L13"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> display_width = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;display_width.zig&quot;</span>);</span>
<span class="line" id="L14"></span>
<span class="line" id="L15"><span class="tok-comment">// String segmentation.</span>
</span>
<span class="line" id="L16"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CodePoint = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;segmenter/CodePoint.zig&quot;</span>);</span>
<span class="line" id="L17"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> CodePointIterator = CodePoint.CodePointIterator;</span>
<span class="line" id="L18"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> readCodePoint = CodePoint.readCodePoint;</span>
<span class="line" id="L19"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Grapheme = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;segmenter/Grapheme.zig&quot;</span>);</span>
<span class="line" id="L20"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> GraphemeIterator = Grapheme.GraphemeIterator;</span>
<span class="line" id="L21"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> StreamingGraphemeIterator = Grapheme.StreamingGraphemeIterator;</span>
<span class="line" id="L22"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> graphemeBreak = Grapheme.graphemeBreak;</span>
<span class="line" id="L23"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Word = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;segmenter/Word.zig&quot;</span>);</span>
<span class="line" id="L24"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> WordIterator = Word.WordIterator;</span>
<span class="line" id="L25"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Sentence = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;segmenter/Sentence.zig&quot;</span>);</span>
<span class="line" id="L26"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> SentenceIterator = Sentence.SentenceIterator;</span>
<span class="line" id="L27"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> ComptimeSentenceIterator = Sentence.ComptimeSentenceIterator;</span>
<span class="line" id="L28"></span>
<span class="line" id="L29"><span class="tok-comment">// Collation</span>
</span>
<span class="line" id="L30"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Collator = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;collator/Collator.zig&quot;</span>);</span>
<span class="line" id="L31"></span>
<span class="line" id="L32"><span class="tok-comment">// Normalization</span>
</span>
<span class="line" id="L33"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> Normalizer = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;normalizer/Normalizer.zig&quot;</span>);</span>
<span class="line" id="L34"></span>
<span class="line" id="L35"><span class="tok-comment">// Auto-Generated</span>
</span>
<span class="line" id="L36"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> blocks = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/blocks.zig&quot;</span>);</span>
<span class="line" id="L37"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> case_folding = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/case_folding.zig&quot;</span>);</span>
<span class="line" id="L38"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> combining_class = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/derived_combining_class.zig&quot;</span>);</span>
<span class="line" id="L39"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> core_properties = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/derived_core_properties.zig&quot;</span>);</span>
<span class="line" id="L40"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> east_asian_width = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/derived_east_asian_width.zig&quot;</span>);</span>
<span class="line" id="L41"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> general_category = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/derived_general_category.zig&quot;</span>);</span>
<span class="line" id="L42"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> normalization_props = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/derived_normalization_props.zig&quot;</span>);</span>
<span class="line" id="L43"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> numeric_type = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/derived_numeric_type.zig&quot;</span>);</span>
<span class="line" id="L44"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> emoji = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/emoji_data.zig&quot;</span>);</span>
<span class="line" id="L45"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> grapheme_break = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/grapheme_break_property.zig&quot;</span>);</span>
<span class="line" id="L46"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> hangul = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/hangul_syllable_type.zig&quot;</span>);</span>
<span class="line" id="L47"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> lowercase = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/lower_map.zig&quot;</span>);</span>
<span class="line" id="L48"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> properties = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/prop_list.zig&quot;</span>);</span>
<span class="line" id="L49"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> sentence_break = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/sentence_break_property.zig&quot;</span>);</span>
<span class="line" id="L50"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> titlecase = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/title_map.zig&quot;</span>);</span>
<span class="line" id="L51"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> uppercase = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/upper_map.zig&quot;</span>);</span>
<span class="line" id="L52"><span class="tok-kw">pub</span> <span class="tok-kw">const</span> word_break = <span class="tok-builtin">@import</span>(<span class="tok-str">&quot;autogen/word_break_property.zig&quot;</span>);</span>
<span class="line" id="L53"></span>
<span class="line" id="L54"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAlphabetic</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L55"> <span class="tok-kw">return</span> core_properties.isAlphabetic(cp);</span>
<span class="line" id="L56">}</span>
<span class="line" id="L57"></span>
<span class="line" id="L58"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiAlphabetic</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L59"> <span class="tok-kw">return</span> (cp &gt;= <span class="tok-str">'A'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'a'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>);</span>
<span class="line" id="L60">}</span>
<span class="line" id="L61"></span>
<span class="line" id="L62"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAlphaNum</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L63"> <span class="tok-kw">return</span> isAlphabetic(cp) <span class="tok-kw">or</span> isNumber(cp);</span>
<span class="line" id="L64">}</span>
<span class="line" id="L65"></span>
<span class="line" id="L66"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiAlphaNum</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L67"> <span class="tok-kw">return</span> (cp &gt;= <span class="tok-str">'A'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'a'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'0'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>);</span>
<span class="line" id="L68">}</span>
<span class="line" id="L69"></span>
<span class="line" id="L70"><span class="tok-comment">/// `isCased` returns true if `cp` can be lower, title, or uppercase.</span></span>
<span class="line" id="L71"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isCased</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L72"> <span class="tok-kw">return</span> letter.isCased(cp);</span>
<span class="line" id="L73">}</span>
<span class="line" id="L74"></span>
<span class="line" id="L75"><span class="tok-comment">/// `isCasedStr` returns true when all code points in `str` are either lower, title, or uppercase.</span></span>
<span class="line" id="L76"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isCasedStr</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L77"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L78"></span>
<span class="line" id="L79"> <span class="tok-kw">return</span> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L80"> <span class="tok-kw">if</span> (!isCased(cp.code)) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L81"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L82">}</span>
<span class="line" id="L83"></span>
<span class="line" id="L84"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isCasedStr&quot;</span> {</span>
<span class="line" id="L85"> <span class="tok-kw">try</span> std.testing.expect(isCasedStr(<span class="tok-str">&quot;abc&quot;</span>));</span>
<span class="line" id="L86"> <span class="tok-kw">try</span> std.testing.expect(!isCasedStr(<span class="tok-str">&quot;abc123&quot;</span>));</span>
<span class="line" id="L87"> <span class="tok-kw">try</span> std.testing.expect(!isCasedStr(<span class="tok-str">&quot;123&quot;</span>));</span>
<span class="line" id="L88">}</span>
<span class="line" id="L89"></span>
<span class="line" id="L90"><span class="tok-comment">/// `isDecimal` detects all Unicode decimal numbers.</span></span>
<span class="line" id="L91"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isDecimal</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L92"> <span class="tok-kw">return</span> number.isDecimal(cp);</span>
<span class="line" id="L93">}</span>
<span class="line" id="L94"></span>
<span class="line" id="L95"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L96"> <span class="tok-kw">return</span> number.isDigit(cp);</span>
<span class="line" id="L97">}</span>
<span class="line" id="L98"></span>
<span class="line" id="L99"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L100"> <span class="tok-kw">return</span> cp &gt;= <span class="tok-str">'0'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>;</span>
<span class="line" id="L101">}</span>
<span class="line" id="L102"></span>
<span class="line" id="L103"><span class="tok-comment">/// `isGraphic` detects any code point that can be represented graphically, including spaces.</span></span>
<span class="line" id="L104"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isGraphic</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L105"> <span class="tok-kw">return</span> isPrint(cp) <span class="tok-kw">or</span> isWhiteSpace(cp);</span>
<span class="line" id="L106">}</span>
<span class="line" id="L107"></span>
<span class="line" id="L108"><span class="tok-comment">// `isHexDigit` detects hexadecimal code points.</span>
</span>
<span class="line" id="L109"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isHexDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L110"> <span class="tok-kw">return</span> number.isHexDigit(cp);</span>
<span class="line" id="L111">}</span>
<span class="line" id="L112"></span>
<span class="line" id="L113"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiHexDigit</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L114"> <span class="tok-kw">return</span> (cp &gt;= <span class="tok-str">'a'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'f'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'A'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'F'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'0'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>);</span>
<span class="line" id="L115">}</span>
<span class="line" id="L116"></span>
<span class="line" id="L117"><span class="tok-comment">/// `isPrint` detects any code point that can be printed, excluding spaces.</span></span>
<span class="line" id="L118"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isPrint</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L119"> <span class="tok-kw">return</span> isAlphaNum(cp) <span class="tok-kw">or</span> isMark(cp) <span class="tok-kw">or</span> isPunct(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L120"> isSymbol(cp) <span class="tok-kw">or</span> isWhiteSpace(cp);</span>
<span class="line" id="L121">}</span>
<span class="line" id="L122"></span>
<span class="line" id="L123"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiPrint</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L124"> <span class="tok-kw">return</span> std.ascii.isPrint(<span class="tok-builtin">@intCast</span>(cp));</span>
<span class="line" id="L125">}</span>
<span class="line" id="L126"></span>
<span class="line" id="L127"><span class="tok-comment">/// `isControl` detects control characters.</span></span>
<span class="line" id="L128"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isControl</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L129"> <span class="tok-kw">return</span> general_category.isControl(cp);</span>
<span class="line" id="L130">}</span>
<span class="line" id="L131"></span>
<span class="line" id="L132"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiControl</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L133"> <span class="tok-kw">return</span> std.ascii.isControl(<span class="tok-builtin">@intCast</span>(cp));</span>
<span class="line" id="L134">}</span>
<span class="line" id="L135"></span>
<span class="line" id="L136"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isLetter</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L137"> <span class="tok-kw">return</span> letter.isLetter(cp);</span>
<span class="line" id="L138">}</span>
<span class="line" id="L139"></span>
<span class="line" id="L140"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiLetter</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L141"> <span class="tok-kw">return</span> (cp &gt;= <span class="tok-str">'A'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) <span class="tok-kw">or</span> (cp &gt;= <span class="tok-str">'a'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>);</span>
<span class="line" id="L142">}</span>
<span class="line" id="L143"></span>
<span class="line" id="L144"><span class="tok-comment">/// `isLower` detects code points that are lowercase.</span></span>
<span class="line" id="L145"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L146"> <span class="tok-kw">return</span> letter.isLower(cp);</span>
<span class="line" id="L147">}</span>
<span class="line" id="L148"></span>
<span class="line" id="L149"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L150"> <span class="tok-kw">return</span> cp &gt;= <span class="tok-str">'a'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>;</span>
<span class="line" id="L151">}</span>
<span class="line" id="L152"></span>
<span class="line" id="L153"><span class="tok-comment">/// `isLowerStr` returns true when all code points in `s` are lowercase.</span></span>
<span class="line" id="L154"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isLowerStr</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L155"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L156"></span>
<span class="line" id="L157"> <span class="tok-kw">return</span> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L158"> <span class="tok-kw">if</span> (isCased(cp.code) <span class="tok-kw">and</span> !isLower(cp.code)) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L159"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L160">}</span>
<span class="line" id="L161"></span>
<span class="line" id="L162"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isLowerStr&quot;</span> {</span>
<span class="line" id="L163"> <span class="tok-kw">try</span> std.testing.expect(isLowerStr(<span class="tok-str">&quot;abc&quot;</span>));</span>
<span class="line" id="L164"> <span class="tok-kw">try</span> std.testing.expect(isLowerStr(<span class="tok-str">&quot;abc123&quot;</span>));</span>
<span class="line" id="L165"> <span class="tok-kw">try</span> std.testing.expect(!isLowerStr(<span class="tok-str">&quot;Abc123&quot;</span>));</span>
<span class="line" id="L166">}</span>
<span class="line" id="L167"></span>
<span class="line" id="L168"><span class="tok-comment">/// `isMark` detects Unicode marks (combining, spacing, etc.)</span></span>
<span class="line" id="L169"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isMark</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L170"> <span class="tok-kw">return</span> mark.isMark(cp);</span>
<span class="line" id="L171">}</span>
<span class="line" id="L172"></span>
<span class="line" id="L173"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isNumber</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L174"> <span class="tok-kw">return</span> number.isNumber(cp);</span>
<span class="line" id="L175">}</span>
<span class="line" id="L176"></span>
<span class="line" id="L177"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiNumber</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L178"> <span class="tok-kw">return</span> cp &gt;= <span class="tok-str">'0'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'9'</span>;</span>
<span class="line" id="L179">}</span>
<span class="line" id="L180"></span>
<span class="line" id="L181"><span class="tok-comment">/// `isPunct` detects punctuation characters. Note some punctuation may be considered as symbols by Unicode.</span></span>
<span class="line" id="L182"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isPunct</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L183"> <span class="tok-kw">return</span> punct.isPunct(cp);</span>
<span class="line" id="L184">}</span>
<span class="line" id="L185"></span>
<span class="line" id="L186"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiPunct</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L187"> <span class="tok-kw">return</span> std.ascii.isPunct(<span class="tok-builtin">@intCast</span>(cp));</span>
<span class="line" id="L188">}</span>
<span class="line" id="L189"></span>
<span class="line" id="L190"><span class="tok-comment">/// `isWhiteSpace` detects code points that have the Unicode *WhiteSpace* property.</span></span>
<span class="line" id="L191"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isWhiteSpace</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L192"> <span class="tok-kw">return</span> properties.isWhiteSpace(cp);</span>
<span class="line" id="L193">}</span>
<span class="line" id="L194"></span>
<span class="line" id="L195"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiWhiteSpace</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L196"> <span class="tok-kw">return</span> std.ascii.isSpace(<span class="tok-builtin">@intCast</span>(cp));</span>
<span class="line" id="L197">}</span>
<span class="line" id="L198"></span>
<span class="line" id="L199"><span class="tok-comment">// `isSymbol` detects symbols which may include code points commonly considered to be punctuation.</span>
</span>
<span class="line" id="L200"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isSymbol</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L201"> <span class="tok-kw">return</span> general_category.isMathSymbol(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L202"> general_category.isCurrencySymbol(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L203"> general_category.isModifierSymbol(cp) <span class="tok-kw">or</span></span>
<span class="line" id="L204"> general_category.isOtherSymbol(cp);</span>
<span class="line" id="L205">}</span>
<span class="line" id="L206"></span>
<span class="line" id="L207"><span class="tok-comment">/// `isTitle` detects code points in titlecase, which may be different than uppercase.</span></span>
<span class="line" id="L208"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isTitle</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L209"> <span class="tok-kw">return</span> letter.isTitle(cp);</span>
<span class="line" id="L210">}</span>
<span class="line" id="L211"></span>
<span class="line" id="L212"><span class="tok-comment">/// `isUpper` detects code points in uppercase.</span></span>
<span class="line" id="L213"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L214"> <span class="tok-kw">return</span> letter.isUpper(cp);</span>
<span class="line" id="L215">}</span>
<span class="line" id="L216"></span>
<span class="line" id="L217"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isAsciiUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L218"> <span class="tok-kw">return</span> cp &gt;= <span class="tok-str">'A'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>;</span>
<span class="line" id="L219">}</span>
<span class="line" id="L220"></span>
<span class="line" id="L221"><span class="tok-comment">/// `isUpperStr` returns true when all code points in `str` are uppercase.</span></span>
<span class="line" id="L222"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">isUpperStr</span>(str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) <span class="tok-type">bool</span> {</span>
<span class="line" id="L223"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L224"></span>
<span class="line" id="L225"> <span class="tok-kw">return</span> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L226"> <span class="tok-kw">if</span> (isCased(cp.code) <span class="tok-kw">and</span> !isUpper(cp.code)) <span class="tok-kw">break</span> <span class="tok-null">false</span>;</span>
<span class="line" id="L227"> } <span class="tok-kw">else</span> <span class="tok-null">true</span>;</span>
<span class="line" id="L228">}</span>
<span class="line" id="L229"></span>
<span class="line" id="L230"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isUpperStr&quot;</span> {</span>
<span class="line" id="L231"> <span class="tok-kw">try</span> std.testing.expect(isUpperStr(<span class="tok-str">&quot;ABC&quot;</span>));</span>
<span class="line" id="L232"> <span class="tok-kw">try</span> std.testing.expect(isUpperStr(<span class="tok-str">&quot;ABC123&quot;</span>));</span>
<span class="line" id="L233"> <span class="tok-kw">try</span> std.testing.expect(!isUpperStr(<span class="tok-str">&quot;abc123&quot;</span>));</span>
<span class="line" id="L234">}</span>
<span class="line" id="L235"></span>
<span class="line" id="L236"><span class="tok-comment">/// `toLower` returns the lowercase code point for the given code point. It returns the same</span></span>
<span class="line" id="L237"><span class="tok-comment">/// code point given if no mapping exists.</span></span>
<span class="line" id="L238"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L239"> <span class="tok-kw">return</span> letter.toLower(cp);</span>
<span class="line" id="L240">}</span>
<span class="line" id="L241"></span>
<span class="line" id="L242"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toAsciiLower</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L243"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (cp &gt;= <span class="tok-str">'A'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'Z'</span>) cp ^ <span class="tok-number">32</span> <span class="tok-kw">else</span> cp;</span>
<span class="line" id="L244">}</span>
<span class="line" id="L245"></span>
<span class="line" id="L246"><span class="tok-comment">/// `toCaseFoldStr` returns the case folded version of `str`. Caller must free returned memory.</span></span>
<span class="line" id="L247"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toCaseFoldStr</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L248"> <span class="tok-kw">var</span> result = std.ArrayList(<span class="tok-type">u8</span>).init(allocator);</span>
<span class="line" id="L249"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L250"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L251"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L252"></span>
<span class="line" id="L253"> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L254"> <span class="tok-kw">const</span> cf = letter.toCaseFold(cp.code);</span>
<span class="line" id="L255"> <span class="tok-kw">for</span> (cf) |cfcp| {</span>
<span class="line" id="L256"> <span class="tok-kw">if</span> (cfcp == <span class="tok-number">0</span>) <span class="tok-kw">break</span>;</span>
<span class="line" id="L257"> <span class="tok-kw">const</span> len = <span class="tok-kw">try</span> unicode.utf8Encode(cfcp, &amp;buf);</span>
<span class="line" id="L258"> <span class="tok-kw">try</span> result.appendSlice(buf[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L259"> }</span>
<span class="line" id="L260"> }</span>
<span class="line" id="L261"></span>
<span class="line" id="L262"> <span class="tok-kw">return</span> result.toOwnedSlice();</span>
<span class="line" id="L263">}</span>
<span class="line" id="L264"></span>
<span class="line" id="L265"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph toCaseFoldStr&quot;</span> {</span>
<span class="line" id="L266"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L267"> <span class="tok-kw">const</span> got = <span class="tok-kw">try</span> toCaseFoldStr(allocator, <span class="tok-str">&quot;AbC123\u{0390}&quot;</span>);</span>
<span class="line" id="L268"> <span class="tok-kw">defer</span> allocator.free(got);</span>
<span class="line" id="L269"> <span class="tok-kw">try</span> std.testing.expect(std.mem.eql(<span class="tok-type">u8</span>, <span class="tok-str">&quot;abc123\u{03B9}\u{0308}\u{0301}&quot;</span>, got));</span>
<span class="line" id="L270">}</span>
<span class="line" id="L271"></span>
<span class="line" id="L272"><span class="tok-comment">/// `toLowerStr` returns the lowercase version of `s`. Caller must free returned memory with `allocator`.</span></span>
<span class="line" id="L273"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toLowerStr</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L274"> <span class="tok-kw">var</span> result = std.ArrayList(<span class="tok-type">u8</span>).init(allocator);</span>
<span class="line" id="L275"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L276"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L277"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L278"></span>
<span class="line" id="L279"> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L280"> <span class="tok-kw">const</span> len = <span class="tok-kw">try</span> unicode.utf8Encode(toLower(cp.code), &amp;buf);</span>
<span class="line" id="L281"> <span class="tok-kw">try</span> result.appendSlice(buf[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L282"> }</span>
<span class="line" id="L283"></span>
<span class="line" id="L284"> <span class="tok-kw">return</span> result.toOwnedSlice();</span>
<span class="line" id="L285">}</span>
<span class="line" id="L286"></span>
<span class="line" id="L287"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph toLowerStr&quot;</span> {</span>
<span class="line" id="L288"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L289"> <span class="tok-kw">const</span> got = <span class="tok-kw">try</span> toLowerStr(allocator, <span class="tok-str">&quot;AbC123&quot;</span>);</span>
<span class="line" id="L290"> <span class="tok-kw">defer</span> allocator.free(got);</span>
<span class="line" id="L291"> <span class="tok-kw">try</span> std.testing.expect(std.mem.eql(<span class="tok-type">u8</span>, <span class="tok-str">&quot;abc123&quot;</span>, got));</span>
<span class="line" id="L292">}</span>
<span class="line" id="L293"></span>
<span class="line" id="L294"><span class="tok-comment">/// `toTitle` returns the titlecase code point for the given code point. It returns the same</span></span>
<span class="line" id="L295"><span class="tok-comment">/// code point given if no mapping exists.</span></span>
<span class="line" id="L296"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toTitle</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L297"> <span class="tok-kw">return</span> letter.toTitle(cp);</span>
<span class="line" id="L298">}</span>
<span class="line" id="L299"></span>
<span class="line" id="L300"><span class="tok-comment">/// `toTitleStr` returns the titlecase version of `str`. Caller must free returned memory with `allocator`.</span></span>
<span class="line" id="L301"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toTitleStr</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L302"> <span class="tok-kw">var</span> words = <span class="tok-kw">try</span> WordIterator.init(str);</span>
<span class="line" id="L303"> <span class="tok-kw">var</span> result = std.ArrayList(<span class="tok-type">u8</span>).init(allocator);</span>
<span class="line" id="L304"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L305"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L306"></span>
<span class="line" id="L307"> <span class="tok-kw">while</span> (words.next()) |word| {</span>
<span class="line" id="L308"> <span class="tok-kw">var</span> code_points = CodePointIterator{ .bytes = word.bytes };</span>
<span class="line" id="L309"> <span class="tok-kw">var</span> got_f = <span class="tok-null">false</span>;</span>
<span class="line" id="L310"></span>
<span class="line" id="L311"> <span class="tok-kw">while</span> (code_points.next()) |cp| {</span>
<span class="line" id="L312"> <span class="tok-kw">var</span> len: <span class="tok-type">usize</span> = <span class="tok-number">0</span>;</span>
<span class="line" id="L313"></span>
<span class="line" id="L314"> <span class="tok-kw">if</span> (!got_f <span class="tok-kw">and</span> isCased(cp.code)) {</span>
<span class="line" id="L315"> <span class="tok-comment">// First cased is titlecase.</span>
</span>
<span class="line" id="L316"> len = <span class="tok-kw">try</span> unicode.utf8Encode(toTitle(cp.code), &amp;buf);</span>
<span class="line" id="L317"> got_f = <span class="tok-null">true</span>;</span>
<span class="line" id="L318"> } <span class="tok-kw">else</span> <span class="tok-kw">if</span> (isCased(cp.code)) {</span>
<span class="line" id="L319"> <span class="tok-comment">// Subsequent cased are lowercase.</span>
</span>
<span class="line" id="L320"> len = <span class="tok-kw">try</span> unicode.utf8Encode(toLower(cp.code), &amp;buf);</span>
<span class="line" id="L321"> } <span class="tok-kw">else</span> {</span>
<span class="line" id="L322"> <span class="tok-comment">// Uncased remain the same.</span>
</span>
<span class="line" id="L323"> len = <span class="tok-kw">try</span> unicode.utf8Encode(cp.code, &amp;buf);</span>
<span class="line" id="L324"> }</span>
<span class="line" id="L325"></span>
<span class="line" id="L326"> <span class="tok-kw">try</span> result.appendSlice(buf[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L327"> }</span>
<span class="line" id="L328"> }</span>
<span class="line" id="L329"></span>
<span class="line" id="L330"> <span class="tok-kw">return</span> result.toOwnedSlice();</span>
<span class="line" id="L331">}</span>
<span class="line" id="L332"></span>
<span class="line" id="L333"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph toTitleStr&quot;</span> {</span>
<span class="line" id="L334"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L335"> <span class="tok-kw">const</span> got = <span class="tok-kw">try</span> toTitleStr(allocator, <span class="tok-str">&quot;the aBc123 broWn. fox&quot;</span>);</span>
<span class="line" id="L336"> <span class="tok-kw">defer</span> allocator.free(got);</span>
<span class="line" id="L337"> <span class="tok-kw">try</span> std.testing.expectEqualStrings(<span class="tok-str">&quot;The Abc123 Brown. Fox&quot;</span>, got);</span>
<span class="line" id="L338">}</span>
<span class="line" id="L339"></span>
<span class="line" id="L340"><span class="tok-comment">/// `toUpper` returns the uppercase code point for the given code point. It returns the same</span></span>
<span class="line" id="L341"><span class="tok-comment">/// code point given if no mapping exists.</span></span>
<span class="line" id="L342"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L343"> <span class="tok-kw">return</span> letter.toUpper(cp);</span>
<span class="line" id="L344">}</span>
<span class="line" id="L345"></span>
<span class="line" id="L346"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toAsciiUpper</span>(cp: <span class="tok-type">u21</span>) <span class="tok-type">u21</span> {</span>
<span class="line" id="L347"> <span class="tok-kw">return</span> <span class="tok-kw">if</span> (cp &gt;= <span class="tok-str">'a'</span> <span class="tok-kw">and</span> cp &lt;= <span class="tok-str">'z'</span>) cp ^ <span class="tok-number">32</span> <span class="tok-kw">else</span> cp;</span>
<span class="line" id="L348">}</span>
<span class="line" id="L349"></span>
<span class="line" id="L350"><span class="tok-comment">/// `toUpperStr` returns the uppercase version of `str`. Caller must free returned memory with `allocator`.</span></span>
<span class="line" id="L351"><span class="tok-kw">pub</span> <span class="tok-kw">fn</span> <span class="tok-fn">toUpperStr</span>(allocator: std.mem.Allocator, str: []<span class="tok-kw">const</span> <span class="tok-type">u8</span>) ![]<span class="tok-type">u8</span> {</span>
<span class="line" id="L352"> <span class="tok-kw">var</span> result = std.ArrayList(<span class="tok-type">u8</span>).init(allocator);</span>
<span class="line" id="L353"> <span class="tok-kw">defer</span> result.deinit();</span>
<span class="line" id="L354"> <span class="tok-kw">var</span> buf: [<span class="tok-number">4</span>]<span class="tok-type">u8</span> = <span class="tok-null">undefined</span>;</span>
<span class="line" id="L355"> <span class="tok-kw">var</span> iter = CodePointIterator{ .bytes = str };</span>
<span class="line" id="L356"></span>
<span class="line" id="L357"> <span class="tok-kw">while</span> (iter.next()) |cp| {</span>
<span class="line" id="L358"> <span class="tok-kw">const</span> len = <span class="tok-kw">try</span> unicode.utf8Encode(toUpper(cp.code), &amp;buf);</span>
<span class="line" id="L359"> <span class="tok-kw">try</span> result.appendSlice(buf[<span class="tok-number">0</span>..len]);</span>
<span class="line" id="L360"> }</span>
<span class="line" id="L361"></span>
<span class="line" id="L362"> <span class="tok-kw">return</span> result.toOwnedSlice();</span>
<span class="line" id="L363">}</span>
<span class="line" id="L364"></span>
<span class="line" id="L365"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph toUpperStr&quot;</span> {</span>
<span class="line" id="L366"> <span class="tok-kw">var</span> allocator = std.testing.allocator;</span>
<span class="line" id="L367"> <span class="tok-kw">const</span> got = <span class="tok-kw">try</span> toUpperStr(allocator, <span class="tok-str">&quot;aBc123&quot;</span>);</span>
<span class="line" id="L368"> <span class="tok-kw">defer</span> allocator.free(got);</span>
<span class="line" id="L369"> <span class="tok-kw">try</span> std.testing.expect(std.mem.eql(<span class="tok-type">u8</span>, <span class="tok-str">&quot;ABC123&quot;</span>, got));</span>
<span class="line" id="L370">}</span>
<span class="line" id="L371"></span>
<span class="line" id="L372"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph ASCII methods&quot;</span> {</span>
<span class="line" id="L373"> <span class="tok-kw">const</span> z = <span class="tok-str">'F'</span>;</span>
<span class="line" id="L374"> <span class="tok-kw">try</span> std.testing.expect(isAsciiAlphabetic(z));</span>
<span class="line" id="L375"> <span class="tok-kw">try</span> std.testing.expect(isAsciiAlphaNum(z));</span>
<span class="line" id="L376"> <span class="tok-kw">try</span> std.testing.expect(isAsciiHexDigit(z));</span>
<span class="line" id="L377"> <span class="tok-kw">try</span> std.testing.expect(isAsciiPrint(z));</span>
<span class="line" id="L378"> <span class="tok-kw">try</span> std.testing.expect(isAsciiUpper(z));</span>
<span class="line" id="L379"> <span class="tok-kw">try</span> std.testing.expect(!isAsciiControl(z));</span>
<span class="line" id="L380"> <span class="tok-kw">try</span> std.testing.expect(!isAsciiDigit(z));</span>
<span class="line" id="L381"> <span class="tok-kw">try</span> std.testing.expect(!isAsciiNumber(z));</span>
<span class="line" id="L382"> <span class="tok-kw">try</span> std.testing.expect(!isAsciiLower(z));</span>
<span class="line" id="L383"> <span class="tok-kw">try</span> std.testing.expectEqual(toAsciiLower(z), <span class="tok-str">'f'</span>);</span>
<span class="line" id="L384"> <span class="tok-kw">try</span> std.testing.expectEqual(toAsciiUpper(<span class="tok-str">'a'</span>), <span class="tok-str">'A'</span>);</span>
<span class="line" id="L385"> <span class="tok-kw">try</span> std.testing.expect(isAsciiLower(toAsciiLower(z)));</span>
<span class="line" id="L386">}</span>
<span class="line" id="L387"></span>
<span class="line" id="L388"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph struct&quot;</span> {</span>
<span class="line" id="L389"> <span class="tok-kw">const</span> z = <span class="tok-str">'z'</span>;</span>
<span class="line" id="L390"> <span class="tok-kw">try</span> std.testing.expect(isAlphaNum(z));</span>
<span class="line" id="L391"> <span class="tok-kw">try</span> std.testing.expect(!isControl(z));</span>
<span class="line" id="L392"> <span class="tok-kw">try</span> std.testing.expect(!isDecimal(z));</span>
<span class="line" id="L393"> <span class="tok-kw">try</span> std.testing.expect(!isDigit(z));</span>
<span class="line" id="L394"> <span class="tok-kw">try</span> std.testing.expect(!isHexDigit(z));</span>
<span class="line" id="L395"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(z));</span>
<span class="line" id="L396"> <span class="tok-kw">try</span> std.testing.expect(isLetter(z));</span>
<span class="line" id="L397"> <span class="tok-kw">try</span> std.testing.expect(isLower(z));</span>
<span class="line" id="L398"> <span class="tok-kw">try</span> std.testing.expect(!isMark(z));</span>
<span class="line" id="L399"> <span class="tok-kw">try</span> std.testing.expect(!isNumber(z));</span>
<span class="line" id="L400"> <span class="tok-kw">try</span> std.testing.expect(isPrint(z));</span>
<span class="line" id="L401"> <span class="tok-kw">try</span> std.testing.expect(!isPunct(z));</span>
<span class="line" id="L402"> <span class="tok-kw">try</span> std.testing.expect(!isWhiteSpace(z));</span>
<span class="line" id="L403"> <span class="tok-kw">try</span> std.testing.expect(!isSymbol(z));</span>
<span class="line" id="L404"> <span class="tok-kw">try</span> std.testing.expect(!isTitle(z));</span>
<span class="line" id="L405"> <span class="tok-kw">try</span> std.testing.expect(!isUpper(z));</span>
<span class="line" id="L406"> <span class="tok-kw">const</span> uz = toUpper(z);</span>
<span class="line" id="L407"> <span class="tok-kw">try</span> std.testing.expect(isUpper(uz));</span>
<span class="line" id="L408"> <span class="tok-kw">try</span> std.testing.expectEqual(uz, <span class="tok-str">'Z'</span>);</span>
<span class="line" id="L409"> <span class="tok-kw">const</span> lz = toLower(uz);</span>
<span class="line" id="L410"> <span class="tok-kw">try</span> std.testing.expect(isLower(lz));</span>
<span class="line" id="L411"> <span class="tok-kw">try</span> std.testing.expectEqual(lz, <span class="tok-str">'z'</span>);</span>
<span class="line" id="L412"> <span class="tok-kw">const</span> tz = toTitle(lz);</span>
<span class="line" id="L413"> <span class="tok-kw">try</span> std.testing.expect(isUpper(tz));</span>
<span class="line" id="L414"> <span class="tok-kw">try</span> std.testing.expectEqual(tz, <span class="tok-str">'Z'</span>);</span>
<span class="line" id="L415">}</span>
<span class="line" id="L416"></span>
<span class="line" id="L417"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isGraphic&quot;</span> {</span>
<span class="line" id="L418"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L419"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(<span class="tok-str">'\u{20E4}'</span>));</span>
<span class="line" id="L420"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(<span class="tok-str">'1'</span>));</span>
<span class="line" id="L421"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(<span class="tok-str">'?'</span>));</span>
<span class="line" id="L422"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(<span class="tok-str">' '</span>));</span>
<span class="line" id="L423"> <span class="tok-kw">try</span> std.testing.expect(isGraphic(<span class="tok-str">'='</span>));</span>
<span class="line" id="L424"> <span class="tok-kw">try</span> std.testing.expect(!isGraphic(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L425">}</span>
<span class="line" id="L426"></span>
<span class="line" id="L427"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isHexDigit&quot;</span> {</span>
<span class="line" id="L428"> <span class="tok-kw">var</span> cp: <span class="tok-type">u21</span> = <span class="tok-str">'0'</span>;</span>
<span class="line" id="L429"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'9'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L430"> <span class="tok-kw">try</span> std.testing.expect(isHexDigit(cp));</span>
<span class="line" id="L431"> }</span>
<span class="line" id="L432"></span>
<span class="line" id="L433"> cp = <span class="tok-str">'A'</span>;</span>
<span class="line" id="L434"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'F'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L435"> <span class="tok-kw">try</span> std.testing.expect(isHexDigit(cp));</span>
<span class="line" id="L436"> }</span>
<span class="line" id="L437"></span>
<span class="line" id="L438"> cp = <span class="tok-str">'a'</span>;</span>
<span class="line" id="L439"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'f'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L440"> <span class="tok-kw">try</span> std.testing.expect(isHexDigit(cp));</span>
<span class="line" id="L441"> }</span>
<span class="line" id="L442"></span>
<span class="line" id="L443"> <span class="tok-kw">try</span> std.testing.expect(!isHexDigit(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L444"> <span class="tok-kw">try</span> std.testing.expect(!isHexDigit(<span class="tok-str">'Z'</span>));</span>
<span class="line" id="L445">}</span>
<span class="line" id="L446"></span>
<span class="line" id="L447"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isPrint&quot;</span> {</span>
<span class="line" id="L448"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L449"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">'\u{20E4}'</span>));</span>
<span class="line" id="L450"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">'1'</span>));</span>
<span class="line" id="L451"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">'?'</span>));</span>
<span class="line" id="L452"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">'='</span>));</span>
<span class="line" id="L453"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">' '</span>));</span>
<span class="line" id="L454"> <span class="tok-kw">try</span> std.testing.expect(isPrint(<span class="tok-str">'\t'</span>));</span>
<span class="line" id="L455"> <span class="tok-kw">try</span> std.testing.expect(!isPrint(<span class="tok-str">'\u{0003}'</span>));</span>
<span class="line" id="L456">}</span>
<span class="line" id="L457"></span>
<span class="line" id="L458"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isAlphaNum&quot;</span> {</span>
<span class="line" id="L459"> <span class="tok-kw">var</span> cp: <span class="tok-type">u21</span> = <span class="tok-str">'0'</span>;</span>
<span class="line" id="L460"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'9'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L461"> <span class="tok-kw">try</span> std.testing.expect(isAlphaNum(cp));</span>
<span class="line" id="L462"> }</span>
<span class="line" id="L463"></span>
<span class="line" id="L464"> cp = <span class="tok-str">'a'</span>;</span>
<span class="line" id="L465"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'z'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L466"> <span class="tok-kw">try</span> std.testing.expect(isAlphaNum(cp));</span>
<span class="line" id="L467"> }</span>
<span class="line" id="L468"></span>
<span class="line" id="L469"> cp = <span class="tok-str">'A'</span>;</span>
<span class="line" id="L470"> <span class="tok-kw">while</span> (cp &lt;= <span class="tok-str">'Z'</span>) : (cp += <span class="tok-number">1</span>) {</span>
<span class="line" id="L471"> <span class="tok-kw">try</span> std.testing.expect(isAlphaNum(cp));</span>
<span class="line" id="L472"> }</span>
<span class="line" id="L473"></span>
<span class="line" id="L474"> <span class="tok-kw">try</span> std.testing.expect(!isAlphaNum(<span class="tok-str">'='</span>));</span>
<span class="line" id="L475">}</span>
<span class="line" id="L476"></span>
<span class="line" id="L477"><span class="tok-kw">test</span> <span class="tok-str">&quot;ziglyph isControl&quot;</span> {</span>
<span class="line" id="L478"> <span class="tok-kw">try</span> std.testing.expect(isControl(<span class="tok-str">'\t'</span>));</span>
<span class="line" id="L479"> <span class="tok-kw">try</span> std.testing.expect(isControl(<span class="tok-str">'\u{0008}'</span>));</span>
<span class="line" id="L480"> <span class="tok-kw">try</span> std.testing.expect(isControl(<span class="tok-str">'\u{0012}'</span>));</span>
<span class="line" id="L481"> <span class="tok-kw">try</span> std.testing.expect(isControl(<span class="tok-str">'\n'</span>));</span>
<span class="line" id="L482"> <span class="tok-kw">try</span> std.testing.expect(isControl(<span class="tok-str">'\r'</span>));</span>
<span class="line" id="L483"> <span class="tok-kw">try</span> std.testing.expect(!isControl(<span class="tok-str">'A'</span>));</span>
<span class="line" id="L484">}</span>
<span class="line" id="L485"></span>
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