| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/miniz_oxide-0.7.1/src/deflate/buffer.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>buffer.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="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 source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../miniz_oxide/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../miniz_oxide/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
| <span id="2">2</span> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
| <span id="6">6</span> |
| <span id="7">7</span> |
| <span id="8">8</span> |
| <span id="9">9</span> |
| <span id="10">10</span> |
| <span id="11">11</span> |
| <span id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| <span id="47">47</span> |
| <span id="48">48</span> |
| <span id="49">49</span> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! Buffer wrappers implementing default so we can allocate the buffers with `Box::default()` |
| //! to avoid stack copies. Box::new() doesn't at the moment, and using a vec means we would lose |
| //! static length info. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::deflate::core::{LZ_DICT_SIZE, MAX_MATCH_LEN}; |
| |
| <span class="doccomment">/// Size of the buffer of lz77 encoded data. |
| </span><span class="kw">pub const </span>LZ_CODE_BUF_SIZE: usize = <span class="number">64 </span>* <span class="number">1024</span>; |
| <span class="doccomment">/// Size of the output buffer. |
| </span><span class="kw">pub const </span>OUT_BUF_SIZE: usize = (LZ_CODE_BUF_SIZE * <span class="number">13</span>) / <span class="number">10</span>; |
| <span class="kw">pub const </span>LZ_DICT_FULL_SIZE: usize = LZ_DICT_SIZE + MAX_MATCH_LEN - <span class="number">1 </span>+ <span class="number">1</span>; |
| |
| <span class="doccomment">/// Size of hash values in the hash chains. |
| </span><span class="kw">pub const </span>LZ_HASH_BITS: i32 = <span class="number">15</span>; |
| <span class="doccomment">/// How many bits to shift when updating the current hash value. |
| </span><span class="kw">pub const </span>LZ_HASH_SHIFT: i32 = (LZ_HASH_BITS + <span class="number">2</span>) / <span class="number">3</span>; |
| <span class="doccomment">/// Size of the chained hash tables. |
| </span><span class="kw">pub const </span>LZ_HASH_SIZE: usize = <span class="number">1 </span><< LZ_HASH_BITS; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>update_hash(current_hash: u16, byte: u8) -> u16 { |
| ((current_hash << LZ_HASH_SHIFT) ^ u16::from(byte)) & (LZ_HASH_SIZE <span class="kw">as </span>u16 - <span class="number">1</span>) |
| } |
| |
| <span class="kw">pub struct </span>HashBuffers { |
| <span class="kw">pub </span>dict: [u8; LZ_DICT_FULL_SIZE], |
| <span class="kw">pub </span>next: [u16; LZ_DICT_SIZE], |
| <span class="kw">pub </span>hash: [u16; LZ_DICT_SIZE], |
| } |
| |
| <span class="kw">impl </span>HashBuffers { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>reset(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw-2">*</span><span class="self">self </span>= HashBuffers::default(); |
| } |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>HashBuffers { |
| <span class="kw">fn </span>default() -> HashBuffers { |
| HashBuffers { |
| dict: [<span class="number">0</span>; LZ_DICT_FULL_SIZE], |
| next: [<span class="number">0</span>; LZ_DICT_SIZE], |
| hash: [<span class="number">0</span>; LZ_DICT_SIZE], |
| } |
| } |
| } |
| |
| <span class="kw">pub struct </span>LocalBuf { |
| <span class="kw">pub </span>b: [u8; OUT_BUF_SIZE], |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>LocalBuf { |
| <span class="kw">fn </span>default() -> LocalBuf { |
| LocalBuf { |
| b: [<span class="number">0</span>; OUT_BUF_SIZE], |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="miniz_oxide" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |