| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/unicode-normalization-0.1.22/src/lookups.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lookups.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" href="https://unicode-rs.github.io/unicode-rs_sm.png"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../unicode_normalization/index.html"><div class="logo-container"> |
| <img src="https://unicode-rs.github.io/unicode-rs_sm.png" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../unicode_normalization/index.html"> |
| <img src="https://unicode-rs.github.io/unicode-rs_sm.png" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
| <span id="2">2</span> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
| <span id="6">6</span> |
| <span id="7">7</span> |
| <span id="8">8</span> |
| <span id="9">9</span> |
| <span id="10">10</span> |
| <span id="11">11</span> |
| <span id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| <span id="47">47</span> |
| <span id="48">48</span> |
| <span id="49">49</span> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| <span id="59">59</span> |
| <span id="60">60</span> |
| <span id="61">61</span> |
| <span id="62">62</span> |
| <span id="63">63</span> |
| <span id="64">64</span> |
| <span id="65">65</span> |
| <span id="66">66</span> |
| <span id="67">67</span> |
| <span id="68">68</span> |
| <span id="69">69</span> |
| <span id="70">70</span> |
| <span id="71">71</span> |
| <span id="72">72</span> |
| <span id="73">73</span> |
| <span id="74">74</span> |
| <span id="75">75</span> |
| <span id="76">76</span> |
| <span id="77">77</span> |
| <span id="78">78</span> |
| <span id="79">79</span> |
| <span id="80">80</span> |
| <span id="81">81</span> |
| <span id="82">82</span> |
| <span id="83">83</span> |
| <span id="84">84</span> |
| <span id="85">85</span> |
| <span id="86">86</span> |
| <span id="87">87</span> |
| <span id="88">88</span> |
| <span id="89">89</span> |
| <span id="90">90</span> |
| <span id="91">91</span> |
| <span id="92">92</span> |
| <span id="93">93</span> |
| <span id="94">94</span> |
| <span id="95">95</span> |
| <span id="96">96</span> |
| <span id="97">97</span> |
| <span id="98">98</span> |
| <span id="99">99</span> |
| <span id="100">100</span> |
| <span id="101">101</span> |
| <span id="102">102</span> |
| <span id="103">103</span> |
| <span id="104">104</span> |
| <span id="105">105</span> |
| <span id="106">106</span> |
| <span id="107">107</span> |
| <span id="108">108</span> |
| <span id="109">109</span> |
| <span id="110">110</span> |
| <span id="111">111</span> |
| <span id="112">112</span> |
| <span id="113">113</span> |
| <span id="114">114</span> |
| <span id="115">115</span> |
| <span id="116">116</span> |
| <span id="117">117</span> |
| <span id="118">118</span> |
| <span id="119">119</span> |
| <span id="120">120</span> |
| <span id="121">121</span> |
| <span id="122">122</span> |
| <span id="123">123</span> |
| <span id="124">124</span> |
| <span id="125">125</span> |
| <span id="126">126</span> |
| <span id="127">127</span> |
| <span id="128">128</span> |
| <span id="129">129</span> |
| <span id="130">130</span> |
| <span id="131">131</span> |
| <span id="132">132</span> |
| <span id="133">133</span> |
| <span id="134">134</span> |
| <span id="135">135</span> |
| <span id="136">136</span> |
| <span id="137">137</span> |
| <span id="138">138</span> |
| </pre><pre class="rust"><code><span class="comment">// Copyright 2019 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| </span><span class="doccomment">//! Lookups of unicode properties using minimal perfect hashing. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::perfect_hash::mph_lookup; |
| <span class="kw">use </span><span class="kw">crate</span>::tables::<span class="kw-2">*</span>; |
| |
| <span class="doccomment">/// Look up the canonical combining class for a codepoint. |
| /// |
| /// The value returned is as defined in the Unicode Character Database. |
| </span><span class="kw">pub fn </span>canonical_combining_class(c: char) -> u8 { |
| mph_lookup( |
| c.into(), |
| CANONICAL_COMBINING_CLASS_SALT, |
| CANONICAL_COMBINING_CLASS_KV, |
| u8_lookup_fk, |
| u8_lookup_fv, |
| <span class="number">0</span>, |
| ) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>composition_table(c1: char, c2: char) -> <span class="prelude-ty">Option</span><char> { |
| <span class="kw">if </span>c1 < <span class="string">'\u{10000}' </span>&& c2 < <span class="string">'\u{10000}' </span>{ |
| mph_lookup( |
| (c1 <span class="kw">as </span>u32) << <span class="number">16 </span>| (c2 <span class="kw">as </span>u32), |
| COMPOSITION_TABLE_SALT, |
| COMPOSITION_TABLE_KV, |
| pair_lookup_fk, |
| pair_lookup_fv_opt, |
| <span class="prelude-val">None</span>, |
| ) |
| } <span class="kw">else </span>{ |
| composition_table_astral(c1, c2) |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>canonical_fully_decomposed(c: char) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>[char]> { |
| mph_lookup( |
| c.into(), |
| CANONICAL_DECOMPOSED_SALT, |
| CANONICAL_DECOMPOSED_KV, |
| pair_lookup_fk, |
| pair_lookup_fv_opt, |
| <span class="prelude-val">None</span>, |
| ) |
| .map(|(start, len)| <span class="kw-2">&</span>CANONICAL_DECOMPOSED_CHARS[start <span class="kw">as </span>usize..][..len <span class="kw">as </span>usize]) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>compatibility_fully_decomposed(c: char) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>[char]> { |
| mph_lookup( |
| c.into(), |
| COMPATIBILITY_DECOMPOSED_SALT, |
| COMPATIBILITY_DECOMPOSED_KV, |
| pair_lookup_fk, |
| pair_lookup_fv_opt, |
| <span class="prelude-val">None</span>, |
| ) |
| .map(|(start, len)| <span class="kw-2">&</span>COMPATIBILITY_DECOMPOSED_CHARS[start <span class="kw">as </span>usize..][..len <span class="kw">as </span>usize]) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>cjk_compat_variants_fully_decomposed(c: char) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>[char]> { |
| mph_lookup( |
| c.into(), |
| CJK_COMPAT_VARIANTS_DECOMPOSED_SALT, |
| CJK_COMPAT_VARIANTS_DECOMPOSED_KV, |
| pair_lookup_fk, |
| pair_lookup_fv_opt, |
| <span class="prelude-val">None</span>, |
| ) |
| .map(|(start, len)| <span class="kw-2">&</span>CJK_COMPAT_VARIANTS_DECOMPOSED_CHARS[start <span class="kw">as </span>usize..][..len <span class="kw">as </span>usize]) |
| } |
| |
| <span class="doccomment">/// Return whether the given character is a combining mark (`General_Category=Mark`) |
| </span><span class="kw">pub fn </span>is_combining_mark(c: char) -> bool { |
| mph_lookup( |
| c.into(), |
| COMBINING_MARK_SALT, |
| COMBINING_MARK_KV, |
| bool_lookup_fk, |
| bool_lookup_fv, |
| <span class="bool-val">false</span>, |
| ) |
| } |
| |
| <span class="kw">pub fn </span>stream_safe_trailing_nonstarters(c: char) -> usize { |
| mph_lookup( |
| c.into(), |
| TRAILING_NONSTARTERS_SALT, |
| TRAILING_NONSTARTERS_KV, |
| u8_lookup_fk, |
| u8_lookup_fv, |
| <span class="number">0</span>, |
| ) <span class="kw">as </span>usize |
| } |
| |
| <span class="doccomment">/// Extract the key in a 24 bit key and 8 bit value packed in a u32. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>u8_lookup_fk(kv: u32) -> u32 { |
| kv >> <span class="number">8 |
| </span>} |
| |
| <span class="doccomment">/// Extract the value in a 24 bit key and 8 bit value packed in a u32. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>u8_lookup_fv(kv: u32) -> u8 { |
| (kv & <span class="number">0xff</span>) <span class="kw">as </span>u8 |
| } |
| |
| <span class="doccomment">/// Extract the key for a boolean lookup. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bool_lookup_fk(kv: u32) -> u32 { |
| kv |
| } |
| |
| <span class="doccomment">/// Extract the value for a boolean lookup. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bool_lookup_fv(_kv: u32) -> bool { |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="doccomment">/// Extract the key in a pair. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>pair_lookup_fk<T>(kv: (u32, T)) -> u32 { |
| kv.<span class="number">0 |
| </span>} |
| |
| <span class="doccomment">/// Extract the value in a pair, returning an option. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>pair_lookup_fv_opt<T>(kv: (u32, T)) -> <span class="prelude-ty">Option</span><T> { |
| <span class="prelude-val">Some</span>(kv.<span class="number">1</span>) |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="unicode_normalization" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
