Now a REAL lib
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<!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="List of all items in this crate"><meta name="keywords" content="rust, rustlang, rust-lang"><title>List of all items in this crate</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location">Crate memchr</h2></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><h1 class="fqn"><span class="in-band">List of all items</span></h1><h3 id="Structs">Structs</h3><ul class="structs docblock"><li><a href="struct.Memchr.html">Memchr</a></li><li><a href="struct.Memchr2.html">Memchr2</a></li><li><a href="struct.Memchr3.html">Memchr3</a></li><li><a href="memmem/struct.FindIter.html">memmem::FindIter</a></li><li><a href="memmem/struct.FindRevIter.html">memmem::FindRevIter</a></li><li><a href="memmem/struct.Finder.html">memmem::Finder</a></li><li><a href="memmem/struct.FinderBuilder.html">memmem::FinderBuilder</a></li><li><a href="memmem/struct.FinderRev.html">memmem::FinderRev</a></li></ul><h3 id="Enums">Enums</h3><ul class="enums docblock"><li><a href="memmem/enum.Prefilter.html">memmem::Prefilter</a></li></ul><h3 id="Functions">Functions</h3><ul class="functions docblock"><li><a href="fn.memchr.html">memchr</a></li><li><a href="fn.memchr2.html">memchr2</a></li><li><a href="fn.memchr2_iter.html">memchr2_iter</a></li><li><a href="fn.memchr3.html">memchr3</a></li><li><a href="fn.memchr3_iter.html">memchr3_iter</a></li><li><a href="fn.memchr_iter.html">memchr_iter</a></li><li><a href="memmem/fn.find.html">memmem::find</a></li><li><a href="memmem/fn.find_iter.html">memmem::find_iter</a></li><li><a href="memmem/fn.rfind.html">memmem::rfind</a></li><li><a href="memmem/fn.rfind_iter.html">memmem::rfind_iter</a></li><li><a href="fn.memrchr.html">memrchr</a></li><li><a href="fn.memrchr2.html">memrchr2</a></li><li><a href="fn.memrchr2_iter.html">memrchr2_iter</a></li><li><a href="fn.memrchr3.html">memrchr3</a></li><li><a href="fn.memrchr3_iter.html">memrchr3_iter</a></li><li><a href="fn.memrchr_iter.html">memrchr_iter</a></li></ul></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
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<!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="Search for the first occurrence of a byte in a slice."><meta name="keywords" content="rust, rustlang, rust-lang, memchr"><title>memchr in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memchr</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#87-125">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memchr(needle: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Search for the first occurrence of a byte in a slice.</p>
|
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<p>This returns the index corresponding to the first occurrence of <code>needle</code> in
|
||||
<code>haystack</code>, or <code>None</code> if one is not found. If an index is returned, it is
|
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guaranteed to be less than <code>usize::MAX</code>.</p>
|
||||
<p>While this is operationally the same as something like
|
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<code>haystack.iter().position(|&b| b == needle)</code>, <code>memchr</code> will use a highly
|
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optimized routine that can be up to an order of magnitude faster in some
|
||||
cases.</p>
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<h2 id="example"><a href="#example">Example</a></h2>
|
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<p>This shows how to find the first position of a byte in a byte string.</p>
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|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memchr</span>;
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<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"the quick brown fox"</span>;
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<span class="macro">assert_eq!</span>(<span class="ident">memchr</span>(<span class="string">b'k'</span>, <span class="ident">haystack</span>), <span class="prelude-val">Some</span>(<span class="number">8</span>));</code></pre></div>
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</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
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<!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="Like `memchr`, but searches for either of two bytes instead of just one."><meta name="keywords" content="rust, rustlang, rust-lang, memchr2"><title>memchr2 in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memchr2</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#151-178">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memchr2(needle1: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, needle2: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Like <code>memchr</code>, but searches for either of two bytes instead of just one.</p>
|
||||
<p>This returns the index corresponding to the first occurrence of <code>needle1</code>
|
||||
or the first occurrence of <code>needle2</code> in <code>haystack</code> (whichever occurs
|
||||
earlier), or <code>None</code> if neither one is found. If an index is returned, it is
|
||||
guaranteed to be less than <code>usize::MAX</code>.</p>
|
||||
<p>While this is operationally the same as something like
|
||||
<code>haystack.iter().position(|&b| b == needle1 || b == needle2)</code>, <code>memchr2</code>
|
||||
will use a highly optimized routine that can be up to an order of magnitude
|
||||
faster in some cases.</p>
|
||||
<h2 id="example"><a href="#example">Example</a></h2>
|
||||
<p>This shows how to find the first position of either of two bytes in a byte
|
||||
string.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memchr2</span>;
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||||
|
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<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"the quick brown fox"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="ident">memchr2</span>(<span class="string">b'k'</span>, <span class="string">b'q'</span>, <span class="ident">haystack</span>), <span class="prelude-val">Some</span>(<span class="number">4</span>));</code></pre></div>
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</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
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<!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="Like `memchr`, but searches for any of three bytes instead of just one."><meta name="keywords" content="rust, rustlang, rust-lang, memchr3"><title>memchr3 in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memchr3</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#204-236">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memchr3(<br> needle1: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle2: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle3: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]<br>) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Like <code>memchr</code>, but searches for any of three bytes instead of just one.</p>
|
||||
<p>This returns the index corresponding to the first occurrence of <code>needle1</code>,
|
||||
the first occurrence of <code>needle2</code>, or the first occurrence of <code>needle3</code> in
|
||||
<code>haystack</code> (whichever occurs earliest), or <code>None</code> if none are found. If an
|
||||
index is returned, it is guaranteed to be less than <code>usize::MAX</code>.</p>
|
||||
<p>While this is operationally the same as something like
|
||||
<code>haystack.iter().position(|&b| b == needle1 || b == needle2 || b == needle3)</code>, <code>memchr3</code> will use a highly optimized routine that can be
|
||||
up to an order of magnitude faster in some cases.</p>
|
||||
<h2 id="example"><a href="#example">Example</a></h2>
|
||||
<p>This shows how to find the first position of any of three bytes in a byte
|
||||
string.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memchr3</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"the quick brown fox"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="ident">memchr3</span>(<span class="string">b'k'</span>, <span class="string">b'q'</span>, <span class="string">b'e'</span>, <span class="ident">haystack</span>), <span class="prelude-val">Some</span>(<span class="number">2</span>));</code></pre></div>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
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<!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="Search for the last occurrence of a byte in a slice."><meta name="keywords" content="rust, rustlang, rust-lang, memrchr"><title>memrchr in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memrchr</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#260-299">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memrchr(needle: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Search for the last occurrence of a byte in a slice.</p>
|
||||
<p>This returns the index corresponding to the last occurrence of <code>needle</code> in
|
||||
<code>haystack</code>, or <code>None</code> if one is not found. If an index is returned, it is
|
||||
guaranteed to be less than <code>usize::MAX</code>.</p>
|
||||
<p>While this is operationally the same as something like
|
||||
<code>haystack.iter().rposition(|&b| b == needle)</code>, <code>memrchr</code> will use a highly
|
||||
optimized routine that can be up to an order of magnitude faster in some
|
||||
cases.</p>
|
||||
<h2 id="example"><a href="#example">Example</a></h2>
|
||||
<p>This shows how to find the last position of a byte in a byte string.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memrchr</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"the quick brown fox"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="ident">memrchr</span>(<span class="string">b'o'</span>, <span class="ident">haystack</span>), <span class="prelude-val">Some</span>(<span class="number">17</span>));</code></pre></div>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
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||||
<!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="Like `memrchr`, but searches for either of two bytes instead of just one."><meta name="keywords" content="rust, rustlang, rust-lang, memrchr2"><title>memrchr2 in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memrchr2</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#325-352">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memrchr2(needle1: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, needle2: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Like <code>memrchr</code>, but searches for either of two bytes instead of just one.</p>
|
||||
<p>This returns the index corresponding to the last occurrence of <code>needle1</code> or
|
||||
the last occurrence of <code>needle2</code> in <code>haystack</code> (whichever occurs later), or
|
||||
<code>None</code> if neither one is found. If an index is returned, it is guaranteed
|
||||
to be less than <code>usize::MAX</code>.</p>
|
||||
<p>While this is operationally the same as something like
|
||||
<code>haystack.iter().rposition(|&b| b == needle1 || b == needle2)</code>, <code>memrchr2</code>
|
||||
will use a highly optimized routine that can be up to an order of magnitude
|
||||
faster in some cases.</p>
|
||||
<h2 id="example"><a href="#example">Example</a></h2>
|
||||
<p>This shows how to find the last position of either of two bytes in a byte
|
||||
string.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memrchr2</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"the quick brown fox"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="ident">memrchr2</span>(<span class="string">b'k'</span>, <span class="string">b'q'</span>, <span class="ident">haystack</span>), <span class="prelude-val">Some</span>(<span class="number">8</span>));</code></pre></div>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
2
doc/memchr/fn.memrchr2_iter.html
Normal file
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Normal file
@ -0,0 +1,2 @@
|
||||
<!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="An iterator over all occurrences of the needles in a haystack, in reverse."><meta name="keywords" content="rust, rustlang, rust-lang, memrchr2_iter"><title>memrchr2_iter in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memrchr2_iter</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#46-52">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memrchr2_iter(<br> needle1: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle2: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]<br>) -> <a class="struct" href="https://doc.rust-lang.org/1.64.0/core/iter/adapters/rev/struct.Rev.html" title="struct core::iter::adapters::rev::Rev">Rev</a><<a class="struct" href="struct.Memchr2.html" title="struct memchr::Memchr2">Memchr2</a><'_>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An iterator over all occurrences of the needles in a haystack, in reverse.</p>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
17
doc/memchr/fn.memrchr3.html
Normal file
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|
||||
<!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="Like `memrchr`, but searches for any of three bytes instead of just one."><meta name="keywords" content="rust, rustlang, rust-lang, memrchr3"><title>memrchr3 in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memrchr3</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#378-410">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memrchr3(<br> needle1: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle2: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle3: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]<br>) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Like <code>memrchr</code>, but searches for any of three bytes instead of just one.</p>
|
||||
<p>This returns the index corresponding to the last occurrence of <code>needle1</code>,
|
||||
the last occurrence of <code>needle2</code>, or the last occurrence of <code>needle3</code> in
|
||||
<code>haystack</code> (whichever occurs later), or <code>None</code> if none are found. If an
|
||||
index is returned, it is guaranteed to be less than <code>usize::MAX</code>.</p>
|
||||
<p>While this is operationally the same as something like
|
||||
<code>haystack.iter().rposition(|&b| b == needle1 || b == needle2 || b == needle3)</code>, <code>memrchr3</code> will use a highly optimized routine that can be
|
||||
up to an order of magnitude faster in some cases.</p>
|
||||
<h2 id="example"><a href="#example">Example</a></h2>
|
||||
<p>This shows how to find the last position of any of three bytes in a byte
|
||||
string.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memrchr3</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"the quick brown fox"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="ident">memrchr3</span>(<span class="string">b'k'</span>, <span class="string">b'q'</span>, <span class="string">b'e'</span>, <span class="ident">haystack</span>), <span class="prelude-val">Some</span>(<span class="number">8</span>));</code></pre></div>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
2
doc/memchr/fn.memrchr3_iter.html
Normal file
2
doc/memchr/fn.memrchr3_iter.html
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@ -0,0 +1,2 @@
|
||||
<!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="An iterator over all occurrences of the needles in a haystack, in reverse."><meta name="keywords" content="rust, rustlang, rust-lang, memrchr3_iter"><title>memrchr3_iter in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memrchr3_iter</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#56-63">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memrchr3_iter(<br> needle1: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle2: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> needle3: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>,<br> haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]<br>) -> <a class="struct" href="https://doc.rust-lang.org/1.64.0/core/iter/adapters/rev/struct.Rev.html" title="struct core::iter::adapters::rev::Rev">Rev</a><<a class="struct" href="struct.Memchr3.html" title="struct memchr::Memchr3">Memchr3</a><'_>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An iterator over all occurrences of the needles in a haystack, in reverse.</p>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
2
doc/memchr/fn.memrchr_iter.html
Normal file
2
doc/memchr/fn.memrchr_iter.html
Normal file
@ -0,0 +1,2 @@
|
||||
<!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="An iterator over all occurrences of the needle in a haystack, in reverse."><meta name="keywords" content="rust, rustlang, rust-lang, memrchr_iter"><title>memrchr_iter in memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="index.html">memchr</a>::<wbr><a class="fn" href="#">memrchr_iter</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/memchr/mod.rs.html#40-42">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn memrchr_iter(needle: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>, haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="struct" href="https://doc.rust-lang.org/1.64.0/core/iter/adapters/rev/struct.Rev.html" title="struct core::iter::adapters::rev::Rev">Rev</a><<a class="struct" href="struct.Memchr.html" title="struct memchr::Memchr">Memchr</a><'_>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An iterator over all occurrences of the needle in a haystack, in reverse.</p>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
139
doc/memchr/index.html
Normal file
139
doc/memchr/index.html
Normal file
@ -0,0 +1,139 @@
|
||||
<!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="This library provides heavily optimized routines for string search primitives."><meta name="keywords" content="rust, rustlang, rust-lang, memchr"><title>memchr - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script defer src="../crates.js"></script><script defer src="../main.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc mod crate"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Crate memchr</a></h2><div class="sidebar-elems"><div class="block"><ul><li class="version">Version 2.5.0</li><li><a id="all-types" href="all.html">All Items</a></li></ul></div><section><div class="block"><ul><li><a href="#modules">Modules</a></li><li><a href="#structs">Structs</a></li><li><a href="#functions">Functions</a></li></ul></div></section></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../memchr/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Crate <a class="mod" href="#">memchr</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/memchr/lib.rs.html#1-181">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This library provides heavily optimized routines for string search primitives.</p>
|
||||
<h2 id="overview"><a href="#overview">Overview</a></h2>
|
||||
<p>This section gives a brief high level overview of what this crate offers.</p>
|
||||
<ul>
|
||||
<li>The top-level module provides routines for searching for 1, 2 or 3 bytes
|
||||
in the forward or reverse direction. When searching for more than one byte,
|
||||
positions are considered a match if the byte at that position matches any
|
||||
of the bytes.</li>
|
||||
<li>The <a href="memmem/index.html" title="memmem"><code>memmem</code></a> sub-module provides forward and reverse substring search
|
||||
routines.</li>
|
||||
</ul>
|
||||
<p>In all such cases, routines operate on <code>&[u8]</code> without regard to encoding. This
|
||||
is exactly what you want when searching either UTF-8 or arbitrary bytes.</p>
|
||||
<h2 id="example-using-memchr"><a href="#example-using-memchr">Example: using <code>memchr</code></a></h2>
|
||||
<p>This example shows how to use <code>memchr</code> to find the first occurrence of <code>z</code> in
|
||||
a haystack:</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memchr</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"foo bar baz quuz"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">10</span>), <span class="ident">memchr</span>(<span class="string">b'z'</span>, <span class="ident">haystack</span>));</code></pre></div>
|
||||
<h2 id="example-matching-one-of-three-possible-bytes"><a href="#example-matching-one-of-three-possible-bytes">Example: matching one of three possible bytes</a></h2>
|
||||
<p>This examples shows how to use <code>memrchr3</code> to find occurrences of <code>a</code>, <code>b</code> or
|
||||
<code>c</code>, starting at the end of the haystack.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memchr3_iter</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"xyzaxyzbxyzc"</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">memchr3_iter</span>(<span class="string">b'a'</span>, <span class="string">b'b'</span>, <span class="string">b'c'</span>, <span class="ident">haystack</span>).<span class="ident">rev</span>();
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">11</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">7</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">3</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">it</span>.<span class="ident">next</span>());</code></pre></div>
|
||||
<h2 id="example-iterating-over-substring-matches"><a href="#example-iterating-over-substring-matches">Example: iterating over substring matches</a></h2>
|
||||
<p>This example shows how to use the <a href="memmem/index.html" title="memmem"><code>memmem</code></a> sub-module to find occurrences of
|
||||
a substring in a haystack.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"foo bar foo baz foo"</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">memmem::find_iter</span>(<span class="ident">haystack</span>, <span class="string">"foo"</span>);
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">8</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">16</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">it</span>.<span class="ident">next</span>());</code></pre></div>
|
||||
<h2 id="example-repeating-a-search-for-the-same-needle"><a href="#example-repeating-a-search-for-the-same-needle">Example: repeating a search for the same needle</a></h2>
|
||||
<p>It may be possible for the overhead of constructing a substring searcher to be
|
||||
measurable in some workloads. In cases where the same needle is used to search
|
||||
many haystacks, it is possible to do construction once and thus to avoid it for
|
||||
subsequent searches. This can be done with a <a href="memmem/struct.Finder.html" title="memmem::Finder"><code>memmem::Finder</code></a>:</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">finder</span> <span class="op">=</span> <span class="ident">memmem::Finder::new</span>(<span class="string">"foo"</span>);
|
||||
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">4</span>), <span class="ident">finder</span>.<span class="ident">find</span>(<span class="string">b"baz foo quux"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">finder</span>.<span class="ident">find</span>(<span class="string">b"quux baz bar"</span>));</code></pre></div>
|
||||
<h2 id="why-use-this-crate"><a href="#why-use-this-crate">Why use this crate?</a></h2>
|
||||
<p>At first glance, the APIs provided by this crate might seem weird. Why provide
|
||||
a dedicated routine like <code>memchr</code> for something that could be implemented
|
||||
clearly and trivially in one line:</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">fn</span> <span class="ident">memchr</span>(<span class="ident">needle</span>: <span class="ident">u8</span>, <span class="ident">haystack</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
|
||||
<span class="ident">haystack</span>.<span class="ident">iter</span>().<span class="ident">position</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span> <span class="op">==</span> <span class="ident">needle</span>)
|
||||
}</code></pre></div>
|
||||
<p>Or similarly, why does this crate provide substring search routines when Rust’s
|
||||
core library already provides them?</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">fn</span> <span class="ident">search</span>(<span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">needle</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
|
||||
<span class="ident">haystack</span>.<span class="ident">find</span>(<span class="ident">needle</span>)
|
||||
}</code></pre></div>
|
||||
<p>The primary reason for both of them to exist is performance. When it comes to
|
||||
performance, at a high level at least, there are two primary ways to look at
|
||||
it:</p>
|
||||
<ul>
|
||||
<li><strong>Throughput</strong>: For this, think about it as, “given some very large haystack
|
||||
and a byte that never occurs in that haystack, how long does it take to
|
||||
search through it and determine that it, in fact, does not occur?”</li>
|
||||
<li><strong>Latency</strong>: For this, think about it as, “given a tiny haystack—just a
|
||||
few bytes—how long does it take to determine if a byte is in it?”</li>
|
||||
</ul>
|
||||
<p>The <code>memchr</code> routine in this crate has <em>slightly</em> worse latency than the
|
||||
solution presented above, however, its throughput can easily be over an
|
||||
order of magnitude faster. This is a good general purpose trade off to make.
|
||||
You rarely lose, but often gain big.</p>
|
||||
<p><strong>NOTE:</strong> The name <code>memchr</code> comes from the corresponding routine in libc. A key
|
||||
advantage of using this library is that its performance is not tied to its
|
||||
quality of implementation in the libc you happen to be using, which can vary
|
||||
greatly from platform to platform.</p>
|
||||
<p>But what about substring search? This one is a bit more complicated. The
|
||||
primary reason for its existence is still indeed performance, but it’s also
|
||||
useful because Rust’s core library doesn’t actually expose any substring
|
||||
search routine on arbitrary bytes. The only substring search routine that
|
||||
exists works exclusively on valid UTF-8.</p>
|
||||
<p>So if you have valid UTF-8, is there a reason to use this over the standard
|
||||
library substring search routine? Yes. This routine is faster on almost every
|
||||
metric, including latency. The natural question then, is why isn’t this
|
||||
implementation in the standard library, even if only for searching on UTF-8?
|
||||
The reason is that the implementation details for using SIMD in the standard
|
||||
library haven’t quite been worked out yet.</p>
|
||||
<p><strong>NOTE:</strong> Currently, only <code>x86_64</code> targets have highly accelerated
|
||||
implementations of substring search. For <code>memchr</code>, all targets have
|
||||
somewhat-accelerated implementations, while only <code>x86_64</code> targets have highly
|
||||
accelerated implementations. This limitation is expected to be lifted once the
|
||||
standard library exposes a platform independent SIMD API.</p>
|
||||
<h2 id="crate-features"><a href="#crate-features">Crate features</a></h2>
|
||||
<ul>
|
||||
<li><strong>std</strong> - When enabled (the default), this will permit this crate to use
|
||||
features specific to the standard library. Currently, the only thing used
|
||||
from the standard library is runtime SIMD CPU feature detection. This means
|
||||
that this feature must be enabled to get AVX accelerated routines. When
|
||||
<code>std</code> is not enabled, this crate will still attempt to use SSE2 accelerated
|
||||
routines on <code>x86_64</code>.</li>
|
||||
<li><strong>libc</strong> - When enabled (<strong>not</strong> the default), this library will use your
|
||||
platform’s libc implementation of <code>memchr</code> (and <code>memrchr</code> on Linux). This
|
||||
can be useful on non-<code>x86_64</code> targets where the fallback implementation in
|
||||
this crate is not as good as the one found in your libc. All other routines
|
||||
(e.g., <code>memchr[23]</code> and substring search) unconditionally use the
|
||||
implementation in this crate.</li>
|
||||
</ul>
|
||||
</div></details><h2 id="modules" class="small-section-header"><a href="#modules">Modules</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="mod" href="memmem/index.html" title="memchr::memmem mod">memmem</a></div><div class="item-right docblock-short"><p>This module provides forward and reverse substring search routines.</p>
|
||||
</div></div></div><h2 id="structs" class="small-section-header"><a href="#structs">Structs</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.Memchr.html" title="memchr::Memchr struct">Memchr</a></div><div class="item-right docblock-short"><p>An iterator for <code>memchr</code>.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.Memchr2.html" title="memchr::Memchr2 struct">Memchr2</a></div><div class="item-right docblock-short"><p>An iterator for <code>memchr2</code>.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.Memchr3.html" title="memchr::Memchr3 struct">Memchr3</a></div><div class="item-right docblock-short"><p>An iterator for <code>memchr3</code>.</p>
|
||||
</div></div></div><h2 id="functions" class="small-section-header"><a href="#functions">Functions</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memchr.html" title="memchr::memchr fn">memchr</a></div><div class="item-right docblock-short"><p>Search for the first occurrence of a byte in a slice.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memchr2.html" title="memchr::memchr2 fn">memchr2</a></div><div class="item-right docblock-short"><p>Like <code>memchr</code>, but searches for either of two bytes instead of just one.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memchr2_iter.html" title="memchr::memchr2_iter fn">memchr2_iter</a></div><div class="item-right docblock-short"><p>An iterator over all occurrences of the needles in a haystack.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memchr3.html" title="memchr::memchr3 fn">memchr3</a></div><div class="item-right docblock-short"><p>Like <code>memchr</code>, but searches for any of three bytes instead of just one.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memchr3_iter.html" title="memchr::memchr3_iter fn">memchr3_iter</a></div><div class="item-right docblock-short"><p>An iterator over all occurrences of the needles in a haystack.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memchr_iter.html" title="memchr::memchr_iter fn">memchr_iter</a></div><div class="item-right docblock-short"><p>An iterator over all occurrences of the needle in a haystack.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memrchr.html" title="memchr::memrchr fn">memrchr</a></div><div class="item-right docblock-short"><p>Search for the last occurrence of a byte in a slice.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memrchr2.html" title="memchr::memrchr2 fn">memrchr2</a></div><div class="item-right docblock-short"><p>Like <code>memrchr</code>, but searches for either of two bytes instead of just one.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memrchr2_iter.html" title="memchr::memrchr2_iter fn">memrchr2_iter</a></div><div class="item-right docblock-short"><p>An iterator over all occurrences of the needles in a haystack, in reverse.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memrchr3.html" title="memchr::memrchr3 fn">memrchr3</a></div><div class="item-right docblock-short"><p>Like <code>memrchr</code>, but searches for any of three bytes instead of just one.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memrchr3_iter.html" title="memchr::memrchr3_iter fn">memrchr3_iter</a></div><div class="item-right docblock-short"><p>An iterator over all occurrences of the needles in a haystack, in reverse.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.memrchr_iter.html" title="memchr::memrchr_iter fn">memrchr_iter</a></div><div class="item-right docblock-short"><p>An iterator over all occurrences of the needle in a haystack, in reverse.</p>
|
||||
</div></div></div></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
11
doc/memchr/memchr/fn.memchr.html
Normal file
11
doc/memchr/memchr/fn.memchr.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memchr.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memchr.html">../../memchr/fn.memchr.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memchr.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memchr2.html
Normal file
11
doc/memchr/memchr/fn.memchr2.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memchr2.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memchr2.html">../../memchr/fn.memchr2.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memchr2.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memchr2_iter.html
Normal file
11
doc/memchr/memchr/fn.memchr2_iter.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memchr2_iter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memchr2_iter.html">../../memchr/fn.memchr2_iter.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memchr2_iter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memchr3.html
Normal file
11
doc/memchr/memchr/fn.memchr3.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memchr3.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memchr3.html">../../memchr/fn.memchr3.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memchr3.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memchr3_iter.html
Normal file
11
doc/memchr/memchr/fn.memchr3_iter.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memchr3_iter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memchr3_iter.html">../../memchr/fn.memchr3_iter.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memchr3_iter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memchr_iter.html
Normal file
11
doc/memchr/memchr/fn.memchr_iter.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memchr_iter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memchr_iter.html">../../memchr/fn.memchr_iter.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memchr_iter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memrchr.html
Normal file
11
doc/memchr/memchr/fn.memrchr.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memrchr.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memrchr.html">../../memchr/fn.memrchr.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memrchr.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memrchr2.html
Normal file
11
doc/memchr/memchr/fn.memrchr2.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memrchr2.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memrchr2.html">../../memchr/fn.memrchr2.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memrchr2.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memrchr2_iter.html
Normal file
11
doc/memchr/memchr/fn.memrchr2_iter.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memrchr2_iter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memrchr2_iter.html">../../memchr/fn.memrchr2_iter.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memrchr2_iter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memrchr3.html
Normal file
11
doc/memchr/memchr/fn.memrchr3.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memrchr3.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memrchr3.html">../../memchr/fn.memrchr3.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memrchr3.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memrchr3_iter.html
Normal file
11
doc/memchr/memchr/fn.memrchr3_iter.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memrchr3_iter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memrchr3_iter.html">../../memchr/fn.memrchr3_iter.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memrchr3_iter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/fn.memrchr_iter.html
Normal file
11
doc/memchr/memchr/fn.memrchr_iter.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../memchr/fn.memrchr_iter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../memchr/fn.memrchr_iter.html">../../memchr/fn.memrchr_iter.html</a>...</p>
|
||||
<script>location.replace("../../memchr/fn.memrchr_iter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/iter/struct.Memchr.html
Normal file
11
doc/memchr/memchr/iter/struct.Memchr.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../../memchr/struct.Memchr.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../../memchr/struct.Memchr.html">../../../memchr/struct.Memchr.html</a>...</p>
|
||||
<script>location.replace("../../../memchr/struct.Memchr.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/iter/struct.Memchr2.html
Normal file
11
doc/memchr/memchr/iter/struct.Memchr2.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../../memchr/struct.Memchr2.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../../memchr/struct.Memchr2.html">../../../memchr/struct.Memchr2.html</a>...</p>
|
||||
<script>location.replace("../../../memchr/struct.Memchr2.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
11
doc/memchr/memchr/iter/struct.Memchr3.html
Normal file
11
doc/memchr/memchr/iter/struct.Memchr3.html
Normal file
@ -0,0 +1,11 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../../memchr/struct.Memchr3.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../../memchr/struct.Memchr3.html">../../../memchr/struct.Memchr3.html</a>...</p>
|
||||
<script>location.replace("../../../memchr/struct.Memchr3.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
48
doc/memchr/memmem/enum.Prefilter.html
Normal file
48
doc/memchr/memmem/enum.Prefilter.html
Normal file
File diff suppressed because one or more lines are too long
20
doc/memchr/memmem/fn.find.html
Normal file
20
doc/memchr/memmem/fn.find.html
Normal file
@ -0,0 +1,20 @@
|
||||
<!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="Returns the index of the first occurrence of the given needle."><meta name="keywords" content="rust, rustlang, rust-lang, find"><title>find in memchr::memmem - Rust</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" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr::memmem</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../memchr/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="../index.html">memchr</a>::<wbr><a href="index.html">memmem</a>::<wbr><a class="fn" href="#">find</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/memchr/memmem/mod.rs.html#259-265">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn find(haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>], needle: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Returns the index of the first occurrence of the given needle.</p>
|
||||
<p>Note that if you’re are searching for the same needle in many different
|
||||
small haystacks, it may be faster to initialize a <a href="struct.Finder.html" title="Finder"><code>Finder</code></a> once,
|
||||
and reuse it for each search.</p>
|
||||
<h2 id="complexity"><a href="#complexity">Complexity</a></h2>
|
||||
<p>This routine is guaranteed to have worst case linear time complexity
|
||||
with respect to both the needle and the haystack. That is, this runs
|
||||
in <code>O(needle.len() + haystack.len())</code> time.</p>
|
||||
<p>This routine is also guaranteed to have worst case constant space
|
||||
complexity.</p>
|
||||
<h2 id="examples"><a href="#examples">Examples</a></h2>
|
||||
<p>Basic usage:</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"foo bar baz"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), <span class="ident">memmem::find</span>(<span class="ident">haystack</span>, <span class="string">b"foo"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">4</span>), <span class="ident">memmem::find</span>(<span class="ident">haystack</span>, <span class="string">b"bar"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">memmem::find</span>(<span class="ident">haystack</span>, <span class="string">b"quux"</span>));</code></pre></div>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
20
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|
||||
<!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="Returns the index of the last occurrence of the given needle."><meta name="keywords" content="rust, rustlang, rust-lang, rfind"><title>rfind in memchr::memmem - Rust</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" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In memchr::memmem</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../memchr/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="../index.html">memchr</a>::<wbr><a href="index.html">memmem</a>::<wbr><a class="fn" href="#">rfind</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/memchr/memmem/mod.rs.html#296-302">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn rfind(haystack: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>], needle: &[<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>]) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Returns the index of the last occurrence of the given needle.</p>
|
||||
<p>Note that if you’re are searching for the same needle in many different
|
||||
small haystacks, it may be faster to initialize a <a href="struct.FinderRev.html" title="FinderRev"><code>FinderRev</code></a> once,
|
||||
and reuse it for each search.</p>
|
||||
<h2 id="complexity"><a href="#complexity">Complexity</a></h2>
|
||||
<p>This routine is guaranteed to have worst case linear time complexity
|
||||
with respect to both the needle and the haystack. That is, this runs
|
||||
in <code>O(needle.len() + haystack.len())</code> time.</p>
|
||||
<p>This routine is also guaranteed to have worst case constant space
|
||||
complexity.</p>
|
||||
<h2 id="examples"><a href="#examples">Examples</a></h2>
|
||||
<p>Basic usage:</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"foo bar baz"</span>;
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), <span class="ident">memmem::rfind</span>(<span class="ident">haystack</span>, <span class="string">b"foo"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">4</span>), <span class="ident">memmem::rfind</span>(<span class="ident">haystack</span>, <span class="string">b"bar"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">8</span>), <span class="ident">memmem::rfind</span>(<span class="ident">haystack</span>, <span class="string">b"ba"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">memmem::rfind</span>(<span class="ident">haystack</span>, <span class="string">b"quux"</span>));</code></pre></div>
|
||||
</div></details></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
20
doc/memchr/memmem/fn.rfind_iter.html
Normal file
20
doc/memchr/memmem/fn.rfind_iter.html
Normal file
File diff suppressed because one or more lines are too long
63
doc/memchr/memmem/index.html
Normal file
63
doc/memchr/memmem/index.html
Normal file
@ -0,0 +1,63 @@
|
||||
<!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="This module provides forward and reverse substring search routines."><meta name="keywords" content="rust, rustlang, rust-lang, memmem"><title>memchr::memmem - Rust</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" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../memchr/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Module memmem</a></h2><div class="sidebar-elems"><section><div class="block"><ul><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#functions">Functions</a></li></ul></div></section></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../memchr/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Module <a href="../index.html">memchr</a>::<wbr><a class="mod" href="#">memmem</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/memchr/memmem/mod.rs.html#1-1321">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This module provides forward and reverse substring search routines.</p>
|
||||
<p>Unlike the standard library’s substring search routines, these work on
|
||||
arbitrary bytes. For all non-empty needles, these routines will report exactly
|
||||
the same values as the corresponding routines in the standard library. For
|
||||
the empty needle, the standard library reports matches only at valid UTF-8
|
||||
boundaries, where as these routines will report matches at every position.</p>
|
||||
<p>Other than being able to work on arbitrary bytes, the primary reason to prefer
|
||||
these routines over the standard library routines is that these will generally
|
||||
be faster. In some cases, significantly so.</p>
|
||||
<h2 id="example-iterating-over-substring-matches"><a href="#example-iterating-over-substring-matches">Example: iterating over substring matches</a></h2>
|
||||
<p>This example shows how to use <a href="fn.find_iter.html" title="find_iter"><code>find_iter</code></a> to find occurrences of a substring
|
||||
in a haystack.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"foo bar foo baz foo"</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">memmem::find_iter</span>(<span class="ident">haystack</span>, <span class="string">"foo"</span>);
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">8</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">16</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">it</span>.<span class="ident">next</span>());</code></pre></div>
|
||||
<h2 id="example-iterating-over-substring-matches-in-reverse"><a href="#example-iterating-over-substring-matches-in-reverse">Example: iterating over substring matches in reverse</a></h2>
|
||||
<p>This example shows how to use <a href="fn.rfind_iter.html" title="rfind_iter"><code>rfind_iter</code></a> to find occurrences of a substring
|
||||
in a haystack starting from the end of the haystack.</p>
|
||||
<p><strong>NOTE:</strong> This module does not implement double ended iterators, so reverse
|
||||
searches aren’t done by calling <code>rev</code> on a forward iterator.</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">haystack</span> <span class="op">=</span> <span class="string">b"foo bar foo baz foo"</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">memmem::rfind_iter</span>(<span class="ident">haystack</span>, <span class="string">"foo"</span>);
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">16</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">8</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), <span class="ident">it</span>.<span class="ident">next</span>());
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">it</span>.<span class="ident">next</span>());</code></pre></div>
|
||||
<h2 id="example-repeating-a-search-for-the-same-needle"><a href="#example-repeating-a-search-for-the-same-needle">Example: repeating a search for the same needle</a></h2>
|
||||
<p>It may be possible for the overhead of constructing a substring searcher to be
|
||||
measurable in some workloads. In cases where the same needle is used to search
|
||||
many haystacks, it is possible to do construction once and thus to avoid it for
|
||||
subsequent searches. This can be done with a <a href="struct.Finder.html" title="Finder"><code>Finder</code></a> (or a <a href="struct.FinderRev.html" title="FinderRev"><code>FinderRev</code></a> for
|
||||
reverse searches).</p>
|
||||
|
||||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">memchr::memmem</span>;
|
||||
|
||||
<span class="kw">let</span> <span class="ident">finder</span> <span class="op">=</span> <span class="ident">memmem::Finder::new</span>(<span class="string">"foo"</span>);
|
||||
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">4</span>), <span class="ident">finder</span>.<span class="ident">find</span>(<span class="string">b"baz foo quux"</span>));
|
||||
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, <span class="ident">finder</span>.<span class="ident">find</span>(<span class="string">b"quux baz bar"</span>));</code></pre></div>
|
||||
</div></details><h2 id="structs" class="small-section-header"><a href="#structs">Structs</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.FindIter.html" title="memchr::memmem::FindIter struct">FindIter</a></div><div class="item-right docblock-short"><p>An iterator over non-overlapping substring matches.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.FindRevIter.html" title="memchr::memmem::FindRevIter struct">FindRevIter</a></div><div class="item-right docblock-short"><p>An iterator over non-overlapping substring matches in reverse.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.Finder.html" title="memchr::memmem::Finder struct">Finder</a></div><div class="item-right docblock-short"><p>A single substring searcher fixed to a particular needle.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.FinderBuilder.html" title="memchr::memmem::FinderBuilder struct">FinderBuilder</a></div><div class="item-right docblock-short"><p>A builder for constructing non-default forward or reverse memmem finders.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.FinderRev.html" title="memchr::memmem::FinderRev struct">FinderRev</a></div><div class="item-right docblock-short"><p>A single substring reverse searcher fixed to a particular needle.</p>
|
||||
</div></div></div><h2 id="enums" class="small-section-header"><a href="#enums">Enums</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="enum" href="enum.Prefilter.html" title="memchr::memmem::Prefilter enum">Prefilter</a></div><div class="item-right docblock-short"><p>Prefilter controls whether heuristics are used to accelerate searching.</p>
|
||||
</div></div></div><h2 id="functions" class="small-section-header"><a href="#functions">Functions</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.find.html" title="memchr::memmem::find fn">find</a></div><div class="item-right docblock-short"><p>Returns the index of the first occurrence of the given needle.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.find_iter.html" title="memchr::memmem::find_iter fn">find_iter</a></div><div class="item-right docblock-short"><p>Returns an iterator over all non-overlapping occurrences of a substring in
|
||||
a haystack.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.rfind.html" title="memchr::memmem::rfind fn">rfind</a></div><div class="item-right docblock-short"><p>Returns the index of the last occurrence of the given needle.</p>
|
||||
</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.rfind_iter.html" title="memchr::memmem::rfind_iter fn">rfind_iter</a></div><div class="item-right docblock-short"><p>Returns a reverse iterator over all non-overlapping occurrences of a
|
||||
substring in a haystack.</p>
|
||||
</div></div></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="memchr" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.64.0 (a55dd71d5 2022-09-19)" ></div></body></html>
|
||||
11
doc/memchr/memmem/prefilter/enum.Prefilter.html
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11
doc/memchr/memmem/prefilter/enum.Prefilter.html
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|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0;URL=../../../memchr/memmem/enum.Prefilter.html">
|
||||
<title>Redirection</title>
|
||||
</head>
|
||||
<body>
|
||||
<p>Redirecting to <a href="../../../memchr/memmem/enum.Prefilter.html">../../../memchr/memmem/enum.Prefilter.html</a>...</p>
|
||||
<script>location.replace("../../../memchr/memmem/enum.Prefilter.html" + location.search + location.hash);</script>
|
||||
</body>
|
||||
</html>
|
||||
1
doc/memchr/memmem/sidebar-items.js
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1
doc/memchr/memmem/sidebar-items.js
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|
||||
window.SIDEBAR_ITEMS = {"enum":[["Prefilter","Prefilter controls whether heuristics are used to accelerate searching."]],"fn":[["find","Returns the index of the first occurrence of the given needle."],["find_iter","Returns an iterator over all non-overlapping occurrences of a substring in a haystack."],["rfind","Returns the index of the last occurrence of the given needle."],["rfind_iter","Returns a reverse iterator over all non-overlapping occurrences of a substring in a haystack."]],"struct":[["FindIter","An iterator over non-overlapping substring matches."],["FindRevIter","An iterator over non-overlapping substring matches in reverse."],["Finder","A single substring searcher fixed to a particular needle."],["FinderBuilder","A builder for constructing non-default forward or reverse memmem finders."],["FinderRev","A single substring reverse searcher fixed to a particular needle."]]};
|
||||
138
doc/memchr/memmem/struct.FindIter.html
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138
doc/memchr/memmem/struct.FindIter.html
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138
doc/memchr/memmem/struct.FindRevIter.html
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138
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84
doc/memchr/memmem/struct.Finder.html
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84
doc/memchr/memmem/struct.Finder.html
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31
doc/memchr/memmem/struct.FinderBuilder.html
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31
doc/memchr/memmem/struct.FinderBuilder.html
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87
doc/memchr/memmem/struct.FinderRev.html
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87
doc/memchr/memmem/struct.FinderRev.html
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1
doc/memchr/sidebar-items.js
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1
doc/memchr/sidebar-items.js
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@ -0,0 +1 @@
|
||||
window.SIDEBAR_ITEMS = {"fn":[["memchr","Search for the first occurrence of a byte in a slice."],["memchr2","Like `memchr`, but searches for either of two bytes instead of just one."],["memchr2_iter","An iterator over all occurrences of the needles in a haystack."],["memchr3","Like `memchr`, but searches for any of three bytes instead of just one."],["memchr3_iter","An iterator over all occurrences of the needles in a haystack."],["memchr_iter","An iterator over all occurrences of the needle in a haystack."],["memrchr","Search for the last occurrence of a byte in a slice."],["memrchr2","Like `memrchr`, but searches for either of two bytes instead of just one."],["memrchr2_iter","An iterator over all occurrences of the needles in a haystack, in reverse."],["memrchr3","Like `memrchr`, but searches for any of three bytes instead of just one."],["memrchr3_iter","An iterator over all occurrences of the needles in a haystack, in reverse."],["memrchr_iter","An iterator over all occurrences of the needle in a haystack, in reverse."]],"mod":[["memmem","This module provides forward and reverse substring search routines."]],"struct":[["Memchr","An iterator for `memchr`."],["Memchr2","An iterator for `memchr2`."],["Memchr3","An iterator for `memchr3`."]]};
|
||||
138
doc/memchr/struct.Memchr.html
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138
doc/memchr/struct.Memchr.html
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138
doc/memchr/struct.Memchr2.html
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138
doc/memchr/struct.Memchr2.html
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138
doc/memchr/struct.Memchr3.html
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138
doc/memchr/struct.Memchr3.html
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Reference in New Issue
Block a user