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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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/deflate/buffer.rs`."><title>buffer.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/deflate/</div>buffer.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-2"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! Buffer wrappers implementing default so we can allocate the buffers with `Box::default()`
<a href=#2 id=2 data-nosnippet>2</a>//! to avoid stack copies. Box::new() doesn't at the moment, and using a vec means we would lose
<a href=#3 id=3 data-nosnippet>3</a>//! static length info.
<a href=#4 id=4 data-nosnippet>4</a>
<a href=#5 id=5 data-nosnippet>5</a></span><span class="kw">use </span><span class="kw">crate</span>::deflate::core::{LZ_DICT_SIZE, MAX_MATCH_LEN};
<a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>alloc::boxed::Box;
<a href=#7 id=7 data-nosnippet>7</a><span class="kw">use </span>alloc::vec;
<a href=#8 id=8 data-nosnippet>8</a>
<a href=#9 id=9 data-nosnippet>9</a><span class="doccomment">/// Size of the buffer of lz77 encoded data.
<a href=#10 id=10 data-nosnippet>10</a></span><span class="kw">pub const </span>LZ_CODE_BUF_SIZE: usize = <span class="number">64 </span>* <span class="number">1024</span>;
<a href=#11 id=11 data-nosnippet>11</a><span class="kw">pub const </span>LZ_CODE_BUF_MASK: usize = LZ_CODE_BUF_SIZE - <span class="number">1</span>;
<a href=#12 id=12 data-nosnippet>12</a><span class="doccomment">/// Size of the output buffer.
<a href=#13 id=13 data-nosnippet>13</a></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>;
<a href=#14 id=14 data-nosnippet>14</a><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>;
<a href=#15 id=15 data-nosnippet>15</a>
<a href=#16 id=16 data-nosnippet>16</a><span class="doccomment">/// Size of hash values in the hash chains.
<a href=#17 id=17 data-nosnippet>17</a></span><span class="kw">pub const </span>LZ_HASH_BITS: i32 = <span class="number">15</span>;
<a href=#18 id=18 data-nosnippet>18</a><span class="doccomment">/// How many bits to shift when updating the current hash value.
<a href=#19 id=19 data-nosnippet>19</a></span><span class="kw">pub const </span>LZ_HASH_SHIFT: i32 = (LZ_HASH_BITS + <span class="number">2</span>) / <span class="number">3</span>;
<a href=#20 id=20 data-nosnippet>20</a><span class="doccomment">/// Size of the chained hash tables.
<a href=#21 id=21 data-nosnippet>21</a></span><span class="kw">pub const </span>LZ_HASH_SIZE: usize = <span class="number">1 </span>&lt;&lt; LZ_HASH_BITS;
<a href=#22 id=22 data-nosnippet>22</a>
<a href=#23 id=23 data-nosnippet>23</a><span class="attr">#[inline]
<a href=#24 id=24 data-nosnippet>24</a></span><span class="kw">pub const fn </span>update_hash(current_hash: u16, byte: u8) -&gt; u16 {
<a href=#25 id=25 data-nosnippet>25</a> ((current_hash &lt;&lt; LZ_HASH_SHIFT) ^ byte <span class="kw">as </span>u16) &amp; (LZ_HASH_SIZE <span class="kw">as </span>u16 - <span class="number">1</span>)
<a href=#26 id=26 data-nosnippet>26</a>}
<a href=#27 id=27 data-nosnippet>27</a>
<a href=#28 id=28 data-nosnippet>28</a><span class="kw">pub struct </span>HashBuffers {
<a href=#29 id=29 data-nosnippet>29</a> <span class="kw">pub </span>dict: Box&lt;[u8; LZ_DICT_FULL_SIZE]&gt;,
<a href=#30 id=30 data-nosnippet>30</a> <span class="kw">pub </span>next: Box&lt;[u16; LZ_DICT_SIZE]&gt;,
<a href=#31 id=31 data-nosnippet>31</a> <span class="kw">pub </span>hash: Box&lt;[u16; LZ_DICT_SIZE]&gt;,
<a href=#32 id=32 data-nosnippet>32</a>}
<a href=#33 id=33 data-nosnippet>33</a>
<a href=#34 id=34 data-nosnippet>34</a><span class="kw">impl </span>HashBuffers {
<a href=#35 id=35 data-nosnippet>35</a> <span class="attr">#[inline]
<a href=#36 id=36 data-nosnippet>36</a> </span><span class="kw">pub fn </span>reset(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
<a href=#37 id=37 data-nosnippet>37</a> <span class="self">self</span>.dict.fill(<span class="number">0</span>);
<a href=#38 id=38 data-nosnippet>38</a> <span class="self">self</span>.next.fill(<span class="number">0</span>);
<a href=#39 id=39 data-nosnippet>39</a> <span class="self">self</span>.hash.fill(<span class="number">0</span>);
<a href=#40 id=40 data-nosnippet>40</a> }
<a href=#41 id=41 data-nosnippet>41</a>}
<a href=#42 id=42 data-nosnippet>42</a>
<a href=#43 id=43 data-nosnippet>43</a><span class="kw">impl </span>Default <span class="kw">for </span>HashBuffers {
<a href=#44 id=44 data-nosnippet>44</a> <span class="kw">fn </span>default() -&gt; HashBuffers {
<a href=#45 id=45 data-nosnippet>45</a> HashBuffers {
<a href=#46 id=46 data-nosnippet>46</a> dict: <span class="macro">vec!</span>[<span class="number">0</span>; LZ_DICT_FULL_SIZE]
<a href=#47 id=47 data-nosnippet>47</a> .into_boxed_slice()
<a href=#48 id=48 data-nosnippet>48</a> .try_into()
<a href=#49 id=49 data-nosnippet>49</a> .unwrap(),
<a href=#50 id=50 data-nosnippet>50</a> next: <span class="macro">vec!</span>[<span class="number">0</span>; LZ_DICT_SIZE].into_boxed_slice().try_into().unwrap(),
<a href=#51 id=51 data-nosnippet>51</a> hash: <span class="macro">vec!</span>[<span class="number">0</span>; LZ_DICT_SIZE].into_boxed_slice().try_into().unwrap(),
<a href=#52 id=52 data-nosnippet>52</a> }
<a href=#53 id=53 data-nosnippet>53</a> }
<a href=#54 id=54 data-nosnippet>54</a>}
<a href=#55 id=55 data-nosnippet>55</a>
<a href=#56 id=56 data-nosnippet>56</a><span class="kw">pub struct </span>LocalBuf {
<a href=#57 id=57 data-nosnippet>57</a> <span class="kw">pub </span>b: [u8; OUT_BUF_SIZE],
<a href=#58 id=58 data-nosnippet>58</a>}
<a href=#59 id=59 data-nosnippet>59</a>
<a href=#60 id=60 data-nosnippet>60</a><span class="kw">impl </span>Default <span class="kw">for </span>LocalBuf {
<a href=#61 id=61 data-nosnippet>61</a> <span class="kw">fn </span>default() -&gt; LocalBuf {
<a href=#62 id=62 data-nosnippet>62</a> LocalBuf {
<a href=#63 id=63 data-nosnippet>63</a> b: [<span class="number">0</span>; OUT_BUF_SIZE],
<a href=#64 id=64 data-nosnippet>64</a> }
<a href=#65 id=65 data-nosnippet>65</a> }
<a href=#66 id=66 data-nosnippet>66</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/deflate/mod.rs`."><title>mod.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/deflate/</div>mod.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! This module contains functionality for compression.
<a href=#2 id=2 data-nosnippet>2</a>
<a href=#3 id=3 data-nosnippet>3</a></span><span class="kw">use </span><span class="kw">crate</span>::alloc::vec;
<a href=#4 id=4 data-nosnippet>4</a><span class="kw">use </span><span class="kw">crate</span>::alloc::vec::Vec;
<a href=#5 id=5 data-nosnippet>5</a>
<a href=#6 id=6 data-nosnippet>6</a><span class="kw">mod </span>buffer;
<a href=#7 id=7 data-nosnippet>7</a><span class="kw">pub mod </span>core;
<a href=#8 id=8 data-nosnippet>8</a><span class="kw">mod </span>stored;
<a href=#9 id=9 data-nosnippet>9</a><span class="kw">pub mod </span>stream;
<a href=#10 id=10 data-nosnippet>10</a><span class="kw">mod </span>zlib;
<a href=#11 id=11 data-nosnippet>11</a><span class="kw">use </span><span class="self">self</span>::core::<span class="kw-2">*</span>;
<a href=#12 id=12 data-nosnippet>12</a>
<a href=#13 id=13 data-nosnippet>13</a><span class="doccomment">/// How much processing the compressor should do to compress the data.
<a href=#14 id=14 data-nosnippet>14</a>/// `NoCompression` and `Bestspeed` have special meanings, the other levels determine the number
<a href=#15 id=15 data-nosnippet>15</a>/// of checks for matches in the hash chains and whether to use lazy or greedy parsing.
<a href=#16 id=16 data-nosnippet>16</a></span><span class="attr">#[repr(i32)]
<a href=#17 id=17 data-nosnippet>17</a>#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
<a href=#18 id=18 data-nosnippet>18</a></span><span class="kw">pub enum </span>CompressionLevel {
<a href=#19 id=19 data-nosnippet>19</a> <span class="doccomment">/// Don't do any compression, only output uncompressed blocks.
<a href=#20 id=20 data-nosnippet>20</a> </span>NoCompression = <span class="number">0</span>,
<a href=#21 id=21 data-nosnippet>21</a> <span class="doccomment">/// Fast compression. Uses a special compression routine that is optimized for speed.
<a href=#22 id=22 data-nosnippet>22</a> </span>BestSpeed = <span class="number">1</span>,
<a href=#23 id=23 data-nosnippet>23</a> <span class="doccomment">/// Slow/high compression. Do a lot of checks to try to find good matches.
<a href=#24 id=24 data-nosnippet>24</a> </span>BestCompression = <span class="number">9</span>,
<a href=#25 id=25 data-nosnippet>25</a> <span class="doccomment">/// Even more checks, can be very slow.
<a href=#26 id=26 data-nosnippet>26</a> </span>UberCompression = <span class="number">10</span>,
<a href=#27 id=27 data-nosnippet>27</a> <span class="doccomment">/// Default compromise between speed and compression.
<a href=#28 id=28 data-nosnippet>28</a> </span>DefaultLevel = <span class="number">6</span>,
<a href=#29 id=29 data-nosnippet>29</a> <span class="doccomment">/// Use the default compression level.
<a href=#30 id=30 data-nosnippet>30</a> </span>DefaultCompression = -<span class="number">1</span>,
<a href=#31 id=31 data-nosnippet>31</a>}
<a href=#32 id=32 data-nosnippet>32</a>
<a href=#33 id=33 data-nosnippet>33</a><span class="comment">// Missing safe rust analogue (this and mem-to-mem are quite similar)
<a href=#34 id=34 data-nosnippet>34</a>/*
<a href=#35 id=35 data-nosnippet>35</a>fn tdefl_compress(
<a href=#36 id=36 data-nosnippet>36</a> d: Option&lt;&amp;mut CompressorOxide&gt;,
<a href=#37 id=37 data-nosnippet>37</a> in_buf: *const c_void,
<a href=#38 id=38 data-nosnippet>38</a> in_size: Option&lt;&amp;mut usize&gt;,
<a href=#39 id=39 data-nosnippet>39</a> out_buf: *mut c_void,
<a href=#40 id=40 data-nosnippet>40</a> out_size: Option&lt;&amp;mut usize&gt;,
<a href=#41 id=41 data-nosnippet>41</a> flush: TDEFLFlush,
<a href=#42 id=42 data-nosnippet>42</a>) -&gt; TDEFLStatus {
<a href=#43 id=43 data-nosnippet>43</a> let res = match d {
<a href=#44 id=44 data-nosnippet>44</a> None =&gt; {
<a href=#45 id=45 data-nosnippet>45</a> in_size.map(|size| *size = 0);
<a href=#46 id=46 data-nosnippet>46</a> out_size.map(|size| *size = 0);
<a href=#47 id=47 data-nosnippet>47</a> (TDEFLStatus::BadParam, 0, 0)
<a href=#48 id=48 data-nosnippet>48</a> },
<a href=#49 id=49 data-nosnippet>49</a> Some(compressor) =&gt; {
<a href=#50 id=50 data-nosnippet>50</a> let callback_res = CallbackOxide::new(
<a href=#51 id=51 data-nosnippet>51</a> compressor.callback_func.clone(),
<a href=#52 id=52 data-nosnippet>52</a> in_buf,
<a href=#53 id=53 data-nosnippet>53</a> in_size,
<a href=#54 id=54 data-nosnippet>54</a> out_buf,
<a href=#55 id=55 data-nosnippet>55</a> out_size,
<a href=#56 id=56 data-nosnippet>56</a> );
<a href=#57 id=57 data-nosnippet>57</a>
<a href=#58 id=58 data-nosnippet>58</a> if let Ok(mut callback) = callback_res {
<a href=#59 id=59 data-nosnippet>59</a> let res = compress(compressor, &amp;mut callback, flush);
<a href=#60 id=60 data-nosnippet>60</a> callback.update_size(Some(res.1), Some(res.2));
<a href=#61 id=61 data-nosnippet>61</a> res
<a href=#62 id=62 data-nosnippet>62</a> } else {
<a href=#63 id=63 data-nosnippet>63</a> (TDEFLStatus::BadParam, 0, 0)
<a href=#64 id=64 data-nosnippet>64</a> }
<a href=#65 id=65 data-nosnippet>65</a> }
<a href=#66 id=66 data-nosnippet>66</a> };
<a href=#67 id=67 data-nosnippet>67</a> res.0
<a href=#68 id=68 data-nosnippet>68</a>}*/
<a href=#69 id=69 data-nosnippet>69</a>
<a href=#70 id=70 data-nosnippet>70</a>// Missing safe rust analogue
<a href=#71 id=71 data-nosnippet>71</a>/*
<a href=#72 id=72 data-nosnippet>72</a>fn tdefl_init(
<a href=#73 id=73 data-nosnippet>73</a> d: Option&lt;&amp;mut CompressorOxide&gt;,
<a href=#74 id=74 data-nosnippet>74</a> put_buf_func: PutBufFuncPtr,
<a href=#75 id=75 data-nosnippet>75</a> put_buf_user: *mut c_void,
<a href=#76 id=76 data-nosnippet>76</a> flags: c_int,
<a href=#77 id=77 data-nosnippet>77</a>) -&gt; TDEFLStatus {
<a href=#78 id=78 data-nosnippet>78</a> if let Some(d) = d {
<a href=#79 id=79 data-nosnippet>79</a> *d = CompressorOxide::new(
<a href=#80 id=80 data-nosnippet>80</a> put_buf_func.map(|func|
<a href=#81 id=81 data-nosnippet>81</a> CallbackFunc { put_buf_func: func, put_buf_user: put_buf_user }
<a href=#82 id=82 data-nosnippet>82</a> ),
<a href=#83 id=83 data-nosnippet>83</a> flags as u32,
<a href=#84 id=84 data-nosnippet>84</a> );
<a href=#85 id=85 data-nosnippet>85</a> TDEFLStatus::Okay
<a href=#86 id=86 data-nosnippet>86</a> } else {
<a href=#87 id=87 data-nosnippet>87</a> TDEFLStatus::BadParam
<a href=#88 id=88 data-nosnippet>88</a> }
<a href=#89 id=89 data-nosnippet>89</a>}*/
<a href=#90 id=90 data-nosnippet>90</a>
<a href=#91 id=91 data-nosnippet>91</a>// Missing safe rust analogue (though maybe best served by flate2 front-end instead)
<a href=#92 id=92 data-nosnippet>92</a>/*
<a href=#93 id=93 data-nosnippet>93</a>fn tdefl_compress_mem_to_output(
<a href=#94 id=94 data-nosnippet>94</a> buf: *const c_void,
<a href=#95 id=95 data-nosnippet>95</a> buf_len: usize,
<a href=#96 id=96 data-nosnippet>96</a> put_buf_func: PutBufFuncPtr,
<a href=#97 id=97 data-nosnippet>97</a> put_buf_user: *mut c_void,
<a href=#98 id=98 data-nosnippet>98</a> flags: c_int,
<a href=#99 id=99 data-nosnippet>99</a>) -&gt; bool*/
<a href=#100 id=100 data-nosnippet>100</a>
<a href=#101 id=101 data-nosnippet>101</a>// Missing safe Rust analogue
<a href=#102 id=102 data-nosnippet>102</a>/*
<a href=#103 id=103 data-nosnippet>103</a>fn tdefl_compress_mem_to_mem(
<a href=#104 id=104 data-nosnippet>104</a> out_buf: *mut c_void,
<a href=#105 id=105 data-nosnippet>105</a> out_buf_len: usize,
<a href=#106 id=106 data-nosnippet>106</a> src_buf: *const c_void,
<a href=#107 id=107 data-nosnippet>107</a> src_buf_len: usize,
<a href=#108 id=108 data-nosnippet>108</a> flags: c_int,
<a href=#109 id=109 data-nosnippet>109</a>) -&gt; usize*/
<a href=#110 id=110 data-nosnippet>110</a>
<a href=#111 id=111 data-nosnippet>111</a></span><span class="doccomment">/// Compress the input data to a vector, using the specified compression level (0-10).
<a href=#112 id=112 data-nosnippet>112</a></span><span class="kw">pub fn </span>compress_to_vec(input: <span class="kw-2">&amp;</span>[u8], level: u8) -&gt; Vec&lt;u8&gt; {
<a href=#113 id=113 data-nosnippet>113</a> compress_to_vec_inner(input, level, <span class="number">0</span>, <span class="number">0</span>)
<a href=#114 id=114 data-nosnippet>114</a>}
<a href=#115 id=115 data-nosnippet>115</a>
<a href=#116 id=116 data-nosnippet>116</a><span class="doccomment">/// Compress the input data to a vector, using the specified compression level (0-10), and with a
<a href=#117 id=117 data-nosnippet>117</a>/// zlib wrapper.
<a href=#118 id=118 data-nosnippet>118</a></span><span class="kw">pub fn </span>compress_to_vec_zlib(input: <span class="kw-2">&amp;</span>[u8], level: u8) -&gt; Vec&lt;u8&gt; {
<a href=#119 id=119 data-nosnippet>119</a> compress_to_vec_inner(input, level, <span class="number">1</span>, <span class="number">0</span>)
<a href=#120 id=120 data-nosnippet>120</a>}
<a href=#121 id=121 data-nosnippet>121</a>
<a href=#122 id=122 data-nosnippet>122</a><span class="doccomment">/// Simple function to compress data to a vec.
<a href=#123 id=123 data-nosnippet>123</a></span><span class="kw">fn </span>compress_to_vec_inner(<span class="kw-2">mut </span>input: <span class="kw-2">&amp;</span>[u8], level: u8, window_bits: i32, strategy: i32) -&gt; Vec&lt;u8&gt; {
<a href=#124 id=124 data-nosnippet>124</a> <span class="comment">// The comp flags function sets the zlib flag if the window_bits parameter is &gt; 0.
<a href=#125 id=125 data-nosnippet>125</a> </span><span class="kw">let </span>flags = create_comp_flags_from_zip_params(level.into(), window_bits, strategy);
<a href=#126 id=126 data-nosnippet>126</a> <span class="kw">let </span><span class="kw-2">mut </span>compressor = CompressorOxide::new(flags);
<a href=#127 id=127 data-nosnippet>127</a> <span class="kw">let </span><span class="kw-2">mut </span>output = <span class="macro">vec!</span>[<span class="number">0</span>; ::core::cmp::max(input.len() / <span class="number">2</span>, <span class="number">2</span>)];
<a href=#128 id=128 data-nosnippet>128</a>
<a href=#129 id=129 data-nosnippet>129</a> <span class="kw">let </span><span class="kw-2">mut </span>out_pos = <span class="number">0</span>;
<a href=#130 id=130 data-nosnippet>130</a> <span class="kw">loop </span>{
<a href=#131 id=131 data-nosnippet>131</a> <span class="kw">let </span>(status, bytes_in, bytes_out) = compress(
<a href=#132 id=132 data-nosnippet>132</a> <span class="kw-2">&amp;mut </span>compressor,
<a href=#133 id=133 data-nosnippet>133</a> input,
<a href=#134 id=134 data-nosnippet>134</a> <span class="kw-2">&amp;mut </span>output[out_pos..],
<a href=#135 id=135 data-nosnippet>135</a> TDEFLFlush::Finish,
<a href=#136 id=136 data-nosnippet>136</a> );
<a href=#137 id=137 data-nosnippet>137</a> out_pos += bytes_out;
<a href=#138 id=138 data-nosnippet>138</a>
<a href=#139 id=139 data-nosnippet>139</a> <span class="kw">match </span>status {
<a href=#140 id=140 data-nosnippet>140</a> TDEFLStatus::Done =&gt; {
<a href=#141 id=141 data-nosnippet>141</a> output.truncate(out_pos);
<a href=#142 id=142 data-nosnippet>142</a> <span class="kw">break</span>;
<a href=#143 id=143 data-nosnippet>143</a> }
<a href=#144 id=144 data-nosnippet>144</a> TDEFLStatus::Okay <span class="kw">if </span>bytes_in &lt;= input.len() =&gt; {
<a href=#145 id=145 data-nosnippet>145</a> input = <span class="kw-2">&amp;</span>input[bytes_in..];
<a href=#146 id=146 data-nosnippet>146</a>
<a href=#147 id=147 data-nosnippet>147</a> <span class="comment">// We need more space, so resize the vector.
<a href=#148 id=148 data-nosnippet>148</a> </span><span class="kw">if </span>output.len().saturating_sub(out_pos) &lt; <span class="number">30 </span>{
<a href=#149 id=149 data-nosnippet>149</a> output.resize(output.len() * <span class="number">2</span>, <span class="number">0</span>)
<a href=#150 id=150 data-nosnippet>150</a> }
<a href=#151 id=151 data-nosnippet>151</a> }
<a href=#152 id=152 data-nosnippet>152</a> <span class="comment">// Not supposed to happen unless there is a bug.
<a href=#153 id=153 data-nosnippet>153</a> </span><span class="kw">_ </span>=&gt; <span class="macro">panic!</span>(<span class="string">"Bug! Unexpectedly failed to compress!"</span>),
<a href=#154 id=154 data-nosnippet>154</a> }
<a href=#155 id=155 data-nosnippet>155</a> }
<a href=#156 id=156 data-nosnippet>156</a>
<a href=#157 id=157 data-nosnippet>157</a> output
<a href=#158 id=158 data-nosnippet>158</a>}
<a href=#159 id=159 data-nosnippet>159</a>
<a href=#160 id=160 data-nosnippet>160</a><span class="attr">#[cfg(test)]
<a href=#161 id=161 data-nosnippet>161</a></span><span class="kw">mod </span>test {
<a href=#162 id=162 data-nosnippet>162</a> <span class="kw">use super</span>::{compress_to_vec, compress_to_vec_inner, CompressionStrategy};
<a href=#163 id=163 data-nosnippet>163</a> <span class="kw">use </span><span class="kw">crate</span>::inflate::decompress_to_vec;
<a href=#164 id=164 data-nosnippet>164</a> <span class="kw">use </span>alloc::vec;
<a href=#165 id=165 data-nosnippet>165</a>
<a href=#166 id=166 data-nosnippet>166</a> <span class="doccomment">/// Test deflate example.
<a href=#167 id=167 data-nosnippet>167</a> ///
<a href=#168 id=168 data-nosnippet>168</a> /// Check if the encoder produces the same code as the example given by Mark Adler here:
<a href=#169 id=169 data-nosnippet>169</a> /// https://stackoverflow.com/questions/17398931/deflate-encoding-with-static-huffman-codes/17415203
<a href=#170 id=170 data-nosnippet>170</a> </span><span class="attr">#[test]
<a href=#171 id=171 data-nosnippet>171</a> </span><span class="kw">fn </span>compress_small() {
<a href=#172 id=172 data-nosnippet>172</a> <span class="kw">let </span>test_data = <span class="string">b"Deflate late"</span>;
<a href=#173 id=173 data-nosnippet>173</a> <span class="kw">let </span>check = [
<a href=#174 id=174 data-nosnippet>174</a> <span class="number">0x73</span>, <span class="number">0x49</span>, <span class="number">0x4d</span>, <span class="number">0xcb</span>, <span class="number">0x49</span>, <span class="number">0x2c</span>, <span class="number">0x49</span>, <span class="number">0x55</span>, <span class="number">0x00</span>, <span class="number">0x11</span>, <span class="number">0x00</span>,
<a href=#175 id=175 data-nosnippet>175</a> ];
<a href=#176 id=176 data-nosnippet>176</a>
<a href=#177 id=177 data-nosnippet>177</a> <span class="kw">let </span>res = compress_to_vec(test_data, <span class="number">1</span>);
<a href=#178 id=178 data-nosnippet>178</a> <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>check[..], res.as_slice());
<a href=#179 id=179 data-nosnippet>179</a>
<a href=#180 id=180 data-nosnippet>180</a> <span class="kw">let </span>res = compress_to_vec(test_data, <span class="number">9</span>);
<a href=#181 id=181 data-nosnippet>181</a> <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>check[..], res.as_slice());
<a href=#182 id=182 data-nosnippet>182</a> }
<a href=#183 id=183 data-nosnippet>183</a>
<a href=#184 id=184 data-nosnippet>184</a> <span class="attr">#[test]
<a href=#185 id=185 data-nosnippet>185</a> </span><span class="kw">fn </span>compress_huff_only() {
<a href=#186 id=186 data-nosnippet>186</a> <span class="kw">let </span>test_data = <span class="string">b"Deflate late"</span>;
<a href=#187 id=187 data-nosnippet>187</a>
<a href=#188 id=188 data-nosnippet>188</a> <span class="kw">let </span>res = compress_to_vec_inner(test_data, <span class="number">1</span>, <span class="number">0</span>, CompressionStrategy::HuffmanOnly <span class="kw">as </span>i32);
<a href=#189 id=189 data-nosnippet>189</a> <span class="kw">let </span>d = decompress_to_vec(res.as_slice()).expect(<span class="string">"Failed to decompress!"</span>);
<a href=#190 id=190 data-nosnippet>190</a> <span class="macro">assert_eq!</span>(test_data, d.as_slice());
<a href=#191 id=191 data-nosnippet>191</a> }
<a href=#192 id=192 data-nosnippet>192</a>
<a href=#193 id=193 data-nosnippet>193</a> <span class="attr">#[test]
<a href=#194 id=194 data-nosnippet>194</a> </span><span class="kw">fn </span>compress_rle() {
<a href=#195 id=195 data-nosnippet>195</a> <span class="kw">let </span>test_data = <span class="string">b"Deflate late"</span>;
<a href=#196 id=196 data-nosnippet>196</a>
<a href=#197 id=197 data-nosnippet>197</a> <span class="kw">let </span>res = compress_to_vec_inner(test_data, <span class="number">1</span>, <span class="number">0</span>, CompressionStrategy::RLE <span class="kw">as </span>i32);
<a href=#198 id=198 data-nosnippet>198</a> <span class="kw">let </span>d = decompress_to_vec(res.as_slice()).expect(<span class="string">"Failed to decompress!"</span>);
<a href=#199 id=199 data-nosnippet>199</a> <span class="macro">assert_eq!</span>(test_data, d.as_slice());
<a href=#200 id=200 data-nosnippet>200</a> }
<a href=#201 id=201 data-nosnippet>201</a>
<a href=#202 id=202 data-nosnippet>202</a> <span class="doccomment">/// Test that a raw block compresses fine.
<a href=#203 id=203 data-nosnippet>203</a> </span><span class="attr">#[test]
<a href=#204 id=204 data-nosnippet>204</a> </span><span class="kw">fn </span>compress_raw() {
<a href=#205 id=205 data-nosnippet>205</a> <span class="kw">let </span>text = <span class="string">b"Hello, zlib!"</span>;
<a href=#206 id=206 data-nosnippet>206</a> <span class="kw">let </span>encoded = {
<a href=#207 id=207 data-nosnippet>207</a> <span class="kw">let </span>len = text.len();
<a href=#208 id=208 data-nosnippet>208</a> <span class="kw">let </span>notlen = !len;
<a href=#209 id=209 data-nosnippet>209</a> <span class="kw">let </span><span class="kw-2">mut </span>encoded = <span class="macro">vec!</span>[
<a href=#210 id=210 data-nosnippet>210</a> <span class="number">1</span>,
<a href=#211 id=211 data-nosnippet>211</a> len <span class="kw">as </span>u8,
<a href=#212 id=212 data-nosnippet>212</a> (len &gt;&gt; <span class="number">8</span>) <span class="kw">as </span>u8,
<a href=#213 id=213 data-nosnippet>213</a> notlen <span class="kw">as </span>u8,
<a href=#214 id=214 data-nosnippet>214</a> (notlen &gt;&gt; <span class="number">8</span>) <span class="kw">as </span>u8,
<a href=#215 id=215 data-nosnippet>215</a> ];
<a href=#216 id=216 data-nosnippet>216</a> encoded.extend_from_slice(<span class="kw-2">&amp;</span>text[..]);
<a href=#217 id=217 data-nosnippet>217</a> encoded
<a href=#218 id=218 data-nosnippet>218</a> };
<a href=#219 id=219 data-nosnippet>219</a>
<a href=#220 id=220 data-nosnippet>220</a> <span class="kw">let </span>res = compress_to_vec(text, <span class="number">0</span>);
<a href=#221 id=221 data-nosnippet>221</a> <span class="macro">assert_eq!</span>(encoded, res.as_slice());
<a href=#222 id=222 data-nosnippet>222</a> }
<a href=#223 id=223 data-nosnippet>223</a>
<a href=#224 id=224 data-nosnippet>224</a> <span class="attr">#[test]
<a href=#225 id=225 data-nosnippet>225</a> </span><span class="kw">fn </span>short() {
<a href=#226 id=226 data-nosnippet>226</a> <span class="kw">let </span>test_data = [<span class="number">10</span>, <span class="number">10</span>, <span class="number">10</span>, <span class="number">10</span>, <span class="number">10</span>, <span class="number">55</span>];
<a href=#227 id=227 data-nosnippet>227</a> <span class="kw">let </span>c = compress_to_vec(<span class="kw-2">&amp;</span>test_data, <span class="number">9</span>);
<a href=#228 id=228 data-nosnippet>228</a>
<a href=#229 id=229 data-nosnippet>229</a> <span class="kw">let </span>d = decompress_to_vec(c.as_slice()).expect(<span class="string">"Failed to decompress!"</span>);
<a href=#230 id=230 data-nosnippet>230</a> <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>test_data, d.as_slice());
<a href=#231 id=231 data-nosnippet>231</a> <span class="comment">// Check that a static block is used here, rather than a raw block
<a href=#232 id=232 data-nosnippet>232</a> // , so the data is actually compressed.
<a href=#233 id=233 data-nosnippet>233</a> // (The optimal compressed length would be 5, but neither miniz nor zlib manages that either
<a href=#234 id=234 data-nosnippet>234</a> // as neither checks matches against the byte at index 0.)
<a href=#235 id=235 data-nosnippet>235</a> </span><span class="macro">assert!</span>(c.len() &lt;= <span class="number">6</span>);
<a href=#236 id=236 data-nosnippet>236</a> }
<a href=#237 id=237 data-nosnippet>237</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/deflate/stored.rs`."><title>stored.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/deflate/</div>stored.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span><span class="kw">crate</span>::deflate::buffer::{update_hash, LZ_HASH_SHIFT, LZ_HASH_SIZE};
<a href=#2 id=2 data-nosnippet>2</a><span class="kw">use </span><span class="kw">crate</span>::deflate::core::{
<a href=#3 id=3 data-nosnippet>3</a> flush_block, CallbackOxide, CompressorOxide, TDEFLFlush, TDEFLStatus, LZ_DICT_SIZE,
<a href=#4 id=4 data-nosnippet>4</a> LZ_DICT_SIZE_MASK, MAX_MATCH_LEN, MIN_MATCH_LEN,
<a href=#5 id=5 data-nosnippet>5</a>};
<a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>core::cmp;
<a href=#7 id=7 data-nosnippet>7</a>
<a href=#8 id=8 data-nosnippet>8</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>compress_stored(d: <span class="kw-2">&amp;mut </span>CompressorOxide, callback: <span class="kw-2">&amp;mut </span>CallbackOxide) -&gt; bool {
<a href=#9 id=9 data-nosnippet>9</a> <span class="kw">let </span>in_buf = <span class="kw">match </span>callback.buf() {
<a href=#10 id=10 data-nosnippet>10</a> <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="bool-val">true</span>,
<a href=#11 id=11 data-nosnippet>11</a> <span class="prelude-val">Some</span>(in_buf) =&gt; in_buf,
<a href=#12 id=12 data-nosnippet>12</a> };
<a href=#13 id=13 data-nosnippet>13</a>
<a href=#14 id=14 data-nosnippet>14</a> <span class="comment">// Make sure this is cleared in case compression level is switched later.
<a href=#15 id=15 data-nosnippet>15</a> // TODO: It's possible we don't need this or could do this elsewhere later
<a href=#16 id=16 data-nosnippet>16</a> // but just do this here to avoid causing issues for now.
<a href=#17 id=17 data-nosnippet>17</a> </span>d.params.saved_match_len = <span class="number">0</span>;
<a href=#18 id=18 data-nosnippet>18</a> <span class="kw">let </span><span class="kw-2">mut </span>bytes_written = d.lz.total_bytes;
<a href=#19 id=19 data-nosnippet>19</a> <span class="kw">let </span><span class="kw-2">mut </span>src_pos = d.params.src_pos;
<a href=#20 id=20 data-nosnippet>20</a> <span class="kw">let </span><span class="kw-2">mut </span>lookahead_size = d.dict.lookahead_size;
<a href=#21 id=21 data-nosnippet>21</a> <span class="kw">let </span><span class="kw-2">mut </span>lookahead_pos = d.dict.lookahead_pos;
<a href=#22 id=22 data-nosnippet>22</a>
<a href=#23 id=23 data-nosnippet>23</a> <span class="kw">while </span>src_pos &lt; in_buf.len() || (d.params.<span class="macro">flush !</span>= TDEFLFlush::None &amp;&amp; <span class="macro">lookahead_size !</span>= <span class="number">0</span>) {
<a href=#24 id=24 data-nosnippet>24</a> <span class="kw">let </span>src_buf_left = in_buf.len() - src_pos;
<a href=#25 id=25 data-nosnippet>25</a> <span class="kw">let </span>num_bytes_to_process = cmp::min(src_buf_left, MAX_MATCH_LEN - lookahead_size);
<a href=#26 id=26 data-nosnippet>26</a>
<a href=#27 id=27 data-nosnippet>27</a> <span class="kw">if </span>lookahead_size + d.dict.size &gt;= usize::from(MIN_MATCH_LEN) - <span class="number">1
<a href=#28 id=28 data-nosnippet>28</a> </span>&amp;&amp; num_bytes_to_process &gt; <span class="number">0
<a href=#29 id=29 data-nosnippet>29</a> </span>{
<a href=#30 id=30 data-nosnippet>30</a> <span class="kw">let </span>dictb = <span class="kw-2">&amp;mut </span>d.dict.b;
<a href=#31 id=31 data-nosnippet>31</a>
<a href=#32 id=32 data-nosnippet>32</a> <span class="kw">let </span><span class="kw-2">mut </span>dst_pos = (lookahead_pos + lookahead_size) &amp; LZ_DICT_SIZE_MASK;
<a href=#33 id=33 data-nosnippet>33</a> <span class="kw">let </span><span class="kw-2">mut </span>ins_pos = lookahead_pos + lookahead_size - <span class="number">2</span>;
<a href=#34 id=34 data-nosnippet>34</a> <span class="comment">// Start the hash value from the first two bytes
<a href=#35 id=35 data-nosnippet>35</a> </span><span class="kw">let </span><span class="kw-2">mut </span>hash = update_hash(
<a href=#36 id=36 data-nosnippet>36</a> u16::from(dictb.dict[ins_pos &amp; LZ_DICT_SIZE_MASK]),
<a href=#37 id=37 data-nosnippet>37</a> dictb.dict[(ins_pos + <span class="number">1</span>) &amp; LZ_DICT_SIZE_MASK],
<a href=#38 id=38 data-nosnippet>38</a> );
<a href=#39 id=39 data-nosnippet>39</a>
<a href=#40 id=40 data-nosnippet>40</a> lookahead_size += num_bytes_to_process;
<a href=#41 id=41 data-nosnippet>41</a>
<a href=#42 id=42 data-nosnippet>42</a> <span class="kw">for </span><span class="kw-2">&amp;</span>c <span class="kw">in </span><span class="kw-2">&amp;</span>in_buf[src_pos..src_pos + num_bytes_to_process] {
<a href=#43 id=43 data-nosnippet>43</a> <span class="comment">// Add byte to input buffer.
<a href=#44 id=44 data-nosnippet>44</a> </span>dictb.dict[dst_pos] = c;
<a href=#45 id=45 data-nosnippet>45</a> <span class="kw">if </span>dst_pos &lt; MAX_MATCH_LEN - <span class="number">1 </span>{
<a href=#46 id=46 data-nosnippet>46</a> dictb.dict[LZ_DICT_SIZE + dst_pos] = c;
<a href=#47 id=47 data-nosnippet>47</a> }
<a href=#48 id=48 data-nosnippet>48</a>
<a href=#49 id=49 data-nosnippet>49</a> <span class="comment">// Generate hash from the current byte,
<a href=#50 id=50 data-nosnippet>50</a> </span>hash = update_hash(hash, c);
<a href=#51 id=51 data-nosnippet>51</a> dictb.next[ins_pos &amp; LZ_DICT_SIZE_MASK] = dictb.hash[hash <span class="kw">as </span>usize];
<a href=#52 id=52 data-nosnippet>52</a> <span class="comment">// and insert it into the hash chain.
<a href=#53 id=53 data-nosnippet>53</a> </span>dictb.hash[hash <span class="kw">as </span>usize] = ins_pos <span class="kw">as </span>u16;
<a href=#54 id=54 data-nosnippet>54</a> dst_pos = (dst_pos + <span class="number">1</span>) &amp; LZ_DICT_SIZE_MASK;
<a href=#55 id=55 data-nosnippet>55</a> ins_pos += <span class="number">1</span>;
<a href=#56 id=56 data-nosnippet>56</a> }
<a href=#57 id=57 data-nosnippet>57</a> src_pos += num_bytes_to_process;
<a href=#58 id=58 data-nosnippet>58</a> } <span class="kw">else </span>{
<a href=#59 id=59 data-nosnippet>59</a> <span class="kw">let </span>dictb = <span class="kw-2">&amp;mut </span>d.dict.b;
<a href=#60 id=60 data-nosnippet>60</a> <span class="kw">for </span><span class="kw-2">&amp;</span>c <span class="kw">in </span><span class="kw-2">&amp;</span>in_buf[src_pos..src_pos + num_bytes_to_process] {
<a href=#61 id=61 data-nosnippet>61</a> <span class="kw">let </span>dst_pos = (lookahead_pos + lookahead_size) &amp; LZ_DICT_SIZE_MASK;
<a href=#62 id=62 data-nosnippet>62</a> dictb.dict[dst_pos] = c;
<a href=#63 id=63 data-nosnippet>63</a> <span class="kw">if </span>dst_pos &lt; MAX_MATCH_LEN - <span class="number">1 </span>{
<a href=#64 id=64 data-nosnippet>64</a> dictb.dict[LZ_DICT_SIZE + dst_pos] = c;
<a href=#65 id=65 data-nosnippet>65</a> }
<a href=#66 id=66 data-nosnippet>66</a>
<a href=#67 id=67 data-nosnippet>67</a> lookahead_size += <span class="number">1</span>;
<a href=#68 id=68 data-nosnippet>68</a> <span class="kw">if </span>lookahead_size + d.dict.size &gt;= MIN_MATCH_LEN.into() {
<a href=#69 id=69 data-nosnippet>69</a> <span class="kw">let </span>ins_pos = lookahead_pos + lookahead_size - <span class="number">3</span>;
<a href=#70 id=70 data-nosnippet>70</a> <span class="kw">let </span>hash = ((u32::from(dictb.dict[ins_pos &amp; LZ_DICT_SIZE_MASK])
<a href=#71 id=71 data-nosnippet>71</a> &lt;&lt; (LZ_HASH_SHIFT * <span class="number">2</span>))
<a href=#72 id=72 data-nosnippet>72</a> ^ ((u32::from(dictb.dict[(ins_pos + <span class="number">1</span>) &amp; LZ_DICT_SIZE_MASK])
<a href=#73 id=73 data-nosnippet>73</a> &lt;&lt; LZ_HASH_SHIFT)
<a href=#74 id=74 data-nosnippet>74</a> ^ u32::from(c)))
<a href=#75 id=75 data-nosnippet>75</a> &amp; (LZ_HASH_SIZE <span class="kw">as </span>u32 - <span class="number">1</span>);
<a href=#76 id=76 data-nosnippet>76</a>
<a href=#77 id=77 data-nosnippet>77</a> dictb.next[ins_pos &amp; LZ_DICT_SIZE_MASK] = dictb.hash[hash <span class="kw">as </span>usize];
<a href=#78 id=78 data-nosnippet>78</a> dictb.hash[hash <span class="kw">as </span>usize] = ins_pos <span class="kw">as </span>u16;
<a href=#79 id=79 data-nosnippet>79</a> }
<a href=#80 id=80 data-nosnippet>80</a> }
<a href=#81 id=81 data-nosnippet>81</a>
<a href=#82 id=82 data-nosnippet>82</a> src_pos += num_bytes_to_process;
<a href=#83 id=83 data-nosnippet>83</a> }
<a href=#84 id=84 data-nosnippet>84</a>
<a href=#85 id=85 data-nosnippet>85</a> d.dict.size = cmp::min(LZ_DICT_SIZE - lookahead_size, d.dict.size);
<a href=#86 id=86 data-nosnippet>86</a> <span class="kw">if </span>d.params.flush == TDEFLFlush::None &amp;&amp; lookahead_size &lt; MAX_MATCH_LEN {
<a href=#87 id=87 data-nosnippet>87</a> <span class="kw">break</span>;
<a href=#88 id=88 data-nosnippet>88</a> }
<a href=#89 id=89 data-nosnippet>89</a>
<a href=#90 id=90 data-nosnippet>90</a> <span class="kw">let </span>len_to_move = <span class="number">1</span>;
<a href=#91 id=91 data-nosnippet>91</a>
<a href=#92 id=92 data-nosnippet>92</a> bytes_written += <span class="number">1</span>;
<a href=#93 id=93 data-nosnippet>93</a>
<a href=#94 id=94 data-nosnippet>94</a> lookahead_pos += len_to_move;
<a href=#95 id=95 data-nosnippet>95</a> <span class="macro">assert!</span>(lookahead_size &gt;= len_to_move);
<a href=#96 id=96 data-nosnippet>96</a> lookahead_size -= len_to_move;
<a href=#97 id=97 data-nosnippet>97</a> d.dict.size = cmp::min(d.dict.size + len_to_move, LZ_DICT_SIZE);
<a href=#98 id=98 data-nosnippet>98</a>
<a href=#99 id=99 data-nosnippet>99</a> <span class="kw">if </span>bytes_written &gt; <span class="number">31 </span>* <span class="number">1024 </span>{
<a href=#100 id=100 data-nosnippet>100</a> d.lz.total_bytes = bytes_written;
<a href=#101 id=101 data-nosnippet>101</a>
<a href=#102 id=102 data-nosnippet>102</a> d.params.src_pos = src_pos;
<a href=#103 id=103 data-nosnippet>103</a> <span class="comment">// These values are used in flush_block, so we need to write them back here.
<a href=#104 id=104 data-nosnippet>104</a> </span>d.dict.lookahead_size = lookahead_size;
<a href=#105 id=105 data-nosnippet>105</a> d.dict.lookahead_pos = lookahead_pos;
<a href=#106 id=106 data-nosnippet>106</a>
<a href=#107 id=107 data-nosnippet>107</a> <span class="kw">let </span>n = flush_block(d, callback, TDEFLFlush::None)
<a href=#108 id=108 data-nosnippet>108</a> .unwrap_or(TDEFLStatus::PutBufFailed <span class="kw">as </span>i32);
<a href=#109 id=109 data-nosnippet>109</a> <span class="kw">if </span><span class="macro">n !</span>= <span class="number">0 </span>{
<a href=#110 id=110 data-nosnippet>110</a> <span class="kw">return </span>n &gt; <span class="number">0</span>;
<a href=#111 id=111 data-nosnippet>111</a> }
<a href=#112 id=112 data-nosnippet>112</a> bytes_written = d.lz.total_bytes;
<a href=#113 id=113 data-nosnippet>113</a> }
<a href=#114 id=114 data-nosnippet>114</a> }
<a href=#115 id=115 data-nosnippet>115</a>
<a href=#116 id=116 data-nosnippet>116</a> d.lz.total_bytes = bytes_written;
<a href=#117 id=117 data-nosnippet>117</a> d.params.src_pos = src_pos;
<a href=#118 id=118 data-nosnippet>118</a> d.dict.lookahead_size = lookahead_size;
<a href=#119 id=119 data-nosnippet>119</a> d.dict.lookahead_pos = lookahead_pos;
<a href=#120 id=120 data-nosnippet>120</a> <span class="bool-val">true
<a href=#121 id=121 data-nosnippet>121</a></span>}
<a href=#122 id=122 data-nosnippet>122</a>
<a href=#123 id=123 data-nosnippet>123</a><span class="comment">/*
<a href=#124 id=124 data-nosnippet>124</a>fn compress_rle(d: &amp;mut CompressorOxide, callback: &amp;mut CallbackOxide) -&gt; bool {
<a href=#125 id=125 data-nosnippet>125</a> let mut src_pos = d.params.src_pos;
<a href=#126 id=126 data-nosnippet>126</a> let in_buf = match callback.in_buf {
<a href=#127 id=127 data-nosnippet>127</a> None =&gt; return true,
<a href=#128 id=128 data-nosnippet>128</a> Some(in_buf) =&gt; in_buf,
<a href=#129 id=129 data-nosnippet>129</a> };
<a href=#130 id=130 data-nosnippet>130</a>
<a href=#131 id=131 data-nosnippet>131</a> let mut lookahead_size = d.dict.lookahead_size;
<a href=#132 id=132 data-nosnippet>132</a> let mut lookahead_pos = d.dict.lookahead_pos;
<a href=#133 id=133 data-nosnippet>133</a> let mut saved_lit = d.params.saved_lit;
<a href=#134 id=134 data-nosnippet>134</a> let mut saved_match_dist = d.params.saved_match_dist;
<a href=#135 id=135 data-nosnippet>135</a> let mut saved_match_len = d.params.saved_match_len;
<a href=#136 id=136 data-nosnippet>136</a>
<a href=#137 id=137 data-nosnippet>137</a> while src_pos &lt; in_buf.len() || (d.params.flush != TDEFLFlush::None &amp;&amp; lookahead_size != 0) {
<a href=#138 id=138 data-nosnippet>138</a> let src_buf_left = in_buf.len() - src_pos;
<a href=#139 id=139 data-nosnippet>139</a> let num_bytes_to_process = cmp::min(src_buf_left, MAX_MATCH_LEN - lookahead_size);
<a href=#140 id=140 data-nosnippet>140</a>
<a href=#141 id=141 data-nosnippet>141</a> if lookahead_size + d.dict.size &gt;= usize::from(MIN_MATCH_LEN) - 1
<a href=#142 id=142 data-nosnippet>142</a> &amp;&amp; num_bytes_to_process &gt; 0
<a href=#143 id=143 data-nosnippet>143</a> {
<a href=#144 id=144 data-nosnippet>144</a> let dictb = &amp;mut d.dict.b;
<a href=#145 id=145 data-nosnippet>145</a>
<a href=#146 id=146 data-nosnippet>146</a> let mut dst_pos = (lookahead_pos + lookahead_size) &amp; LZ_DICT_SIZE_MASK;
<a href=#147 id=147 data-nosnippet>147</a> let mut ins_pos = lookahead_pos + lookahead_size - 2;
<a href=#148 id=148 data-nosnippet>148</a> // Start the hash value from the first two bytes
<a href=#149 id=149 data-nosnippet>149</a> let mut hash = update_hash(
<a href=#150 id=150 data-nosnippet>150</a> u16::from(dictb.dict[ins_pos &amp; LZ_DICT_SIZE_MASK]),
<a href=#151 id=151 data-nosnippet>151</a> dictb.dict[(ins_pos + 1) &amp; LZ_DICT_SIZE_MASK],
<a href=#152 id=152 data-nosnippet>152</a> );
<a href=#153 id=153 data-nosnippet>153</a>
<a href=#154 id=154 data-nosnippet>154</a> lookahead_size += num_bytes_to_process;
<a href=#155 id=155 data-nosnippet>155</a>
<a href=#156 id=156 data-nosnippet>156</a> for &amp;c in &amp;in_buf[src_pos..src_pos + num_bytes_to_process] {
<a href=#157 id=157 data-nosnippet>157</a> // Add byte to input buffer.
<a href=#158 id=158 data-nosnippet>158</a> dictb.dict[dst_pos] = c;
<a href=#159 id=159 data-nosnippet>159</a> if dst_pos &lt; MAX_MATCH_LEN - 1 {
<a href=#160 id=160 data-nosnippet>160</a> dictb.dict[LZ_DICT_SIZE + dst_pos] = c;
<a href=#161 id=161 data-nosnippet>161</a> }
<a href=#162 id=162 data-nosnippet>162</a>
<a href=#163 id=163 data-nosnippet>163</a> // Generate hash from the current byte,
<a href=#164 id=164 data-nosnippet>164</a> hash = update_hash(hash, c);
<a href=#165 id=165 data-nosnippet>165</a> dictb.next[ins_pos &amp; LZ_DICT_SIZE_MASK] = dictb.hash[hash as usize];
<a href=#166 id=166 data-nosnippet>166</a> // and insert it into the hash chain.
<a href=#167 id=167 data-nosnippet>167</a> dictb.hash[hash as usize] = ins_pos as u16;
<a href=#168 id=168 data-nosnippet>168</a> dst_pos = (dst_pos + 1) &amp; LZ_DICT_SIZE_MASK;
<a href=#169 id=169 data-nosnippet>169</a> ins_pos += 1;
<a href=#170 id=170 data-nosnippet>170</a> }
<a href=#171 id=171 data-nosnippet>171</a> src_pos += num_bytes_to_process;
<a href=#172 id=172 data-nosnippet>172</a> } else {
<a href=#173 id=173 data-nosnippet>173</a> let dictb = &amp;mut d.dict.b;
<a href=#174 id=174 data-nosnippet>174</a> for &amp;c in &amp;in_buf[src_pos..src_pos + num_bytes_to_process] {
<a href=#175 id=175 data-nosnippet>175</a> let dst_pos = (lookahead_pos + lookahead_size) &amp; LZ_DICT_SIZE_MASK;
<a href=#176 id=176 data-nosnippet>176</a> dictb.dict[dst_pos] = c;
<a href=#177 id=177 data-nosnippet>177</a> if dst_pos &lt; MAX_MATCH_LEN - 1 {
<a href=#178 id=178 data-nosnippet>178</a> dictb.dict[LZ_DICT_SIZE + dst_pos] = c;
<a href=#179 id=179 data-nosnippet>179</a> }
<a href=#180 id=180 data-nosnippet>180</a>
<a href=#181 id=181 data-nosnippet>181</a> lookahead_size += 1;
<a href=#182 id=182 data-nosnippet>182</a> if lookahead_size + d.dict.size &gt;= MIN_MATCH_LEN.into() {
<a href=#183 id=183 data-nosnippet>183</a> let ins_pos = lookahead_pos + lookahead_size - 3;
<a href=#184 id=184 data-nosnippet>184</a> let hash = ((u32::from(dictb.dict[ins_pos &amp; LZ_DICT_SIZE_MASK])
<a href=#185 id=185 data-nosnippet>185</a> &lt;&lt; (LZ_HASH_SHIFT * 2))
<a href=#186 id=186 data-nosnippet>186</a> ^ ((u32::from(dictb.dict[(ins_pos + 1) &amp; LZ_DICT_SIZE_MASK])
<a href=#187 id=187 data-nosnippet>187</a> &lt;&lt; LZ_HASH_SHIFT)
<a href=#188 id=188 data-nosnippet>188</a> ^ u32::from(c)))
<a href=#189 id=189 data-nosnippet>189</a> &amp; (LZ_HASH_SIZE as u32 - 1);
<a href=#190 id=190 data-nosnippet>190</a>
<a href=#191 id=191 data-nosnippet>191</a> dictb.next[ins_pos &amp; LZ_DICT_SIZE_MASK] = dictb.hash[hash as usize];
<a href=#192 id=192 data-nosnippet>192</a> dictb.hash[hash as usize] = ins_pos as u16;
<a href=#193 id=193 data-nosnippet>193</a> }
<a href=#194 id=194 data-nosnippet>194</a> }
<a href=#195 id=195 data-nosnippet>195</a>
<a href=#196 id=196 data-nosnippet>196</a> src_pos += num_bytes_to_process;
<a href=#197 id=197 data-nosnippet>197</a> }
<a href=#198 id=198 data-nosnippet>198</a>
<a href=#199 id=199 data-nosnippet>199</a> d.dict.size = cmp::min(LZ_DICT_SIZE - lookahead_size, d.dict.size);
<a href=#200 id=200 data-nosnippet>200</a> if d.params.flush == TDEFLFlush::None &amp;&amp; lookahead_size &lt; MAX_MATCH_LEN {
<a href=#201 id=201 data-nosnippet>201</a> break;
<a href=#202 id=202 data-nosnippet>202</a> }
<a href=#203 id=203 data-nosnippet>203</a>
<a href=#204 id=204 data-nosnippet>204</a> let mut len_to_move = 1;
<a href=#205 id=205 data-nosnippet>205</a> let mut cur_match_dist = 0;
<a href=#206 id=206 data-nosnippet>206</a> let mut cur_match_len = if saved_match_len != 0 {
<a href=#207 id=207 data-nosnippet>207</a> saved_match_len
<a href=#208 id=208 data-nosnippet>208</a> } else {
<a href=#209 id=209 data-nosnippet>209</a> u32::from(MIN_MATCH_LEN) - 1
<a href=#210 id=210 data-nosnippet>210</a> };
<a href=#211 id=211 data-nosnippet>211</a> let cur_pos = lookahead_pos &amp; LZ_DICT_SIZE_MASK;
<a href=#212 id=212 data-nosnippet>212</a> // If TDEFL_RLE_MATCHES is set, we only look for repeating sequences of the current byte.
<a href=#213 id=213 data-nosnippet>213</a> if d.dict.size != 0 &amp;&amp; d.params.flags &amp; TDEFL_FORCE_ALL_RAW_BLOCKS == 0 {
<a href=#214 id=214 data-nosnippet>214</a> let c = d.dict.b.dict[(cur_pos.wrapping_sub(1)) &amp; LZ_DICT_SIZE_MASK];
<a href=#215 id=215 data-nosnippet>215</a> cur_match_len = d.dict.b.dict[cur_pos..(cur_pos + lookahead_size)]
<a href=#216 id=216 data-nosnippet>216</a> .iter()
<a href=#217 id=217 data-nosnippet>217</a> .take_while(|&amp;x| *x == c)
<a href=#218 id=218 data-nosnippet>218</a> .count() as u32;
<a href=#219 id=219 data-nosnippet>219</a> if cur_match_len &lt; MIN_MATCH_LEN.into() {
<a href=#220 id=220 data-nosnippet>220</a> cur_match_len = 0
<a href=#221 id=221 data-nosnippet>221</a> } else {
<a href=#222 id=222 data-nosnippet>222</a> cur_match_dist = 1
<a href=#223 id=223 data-nosnippet>223</a> }
<a href=#224 id=224 data-nosnippet>224</a> }
<a href=#225 id=225 data-nosnippet>225</a>
<a href=#226 id=226 data-nosnippet>226</a>
<a href=#227 id=227 data-nosnippet>227</a> let far_and_small = cur_match_len == MIN_MATCH_LEN.into() &amp;&amp; cur_match_dist &gt;= 8 * 1024;
<a href=#228 id=228 data-nosnippet>228</a> let filter_small = d.params.flags &amp; TDEFL_FILTER_MATCHES != 0 &amp;&amp; cur_match_len &lt;= 5;
<a href=#229 id=229 data-nosnippet>229</a> if far_and_small || filter_small || cur_pos == cur_match_dist as usize {
<a href=#230 id=230 data-nosnippet>230</a> cur_match_dist = 0;
<a href=#231 id=231 data-nosnippet>231</a> cur_match_len = 0;
<a href=#232 id=232 data-nosnippet>232</a> }
<a href=#233 id=233 data-nosnippet>233</a>
<a href=#234 id=234 data-nosnippet>234</a> if saved_match_len != 0 {
<a href=#235 id=235 data-nosnippet>235</a> if cur_match_len &gt; saved_match_len {
<a href=#236 id=236 data-nosnippet>236</a> record_literal(&amp;mut d.huff, &amp;mut d.lz, saved_lit);
<a href=#237 id=237 data-nosnippet>237</a> if cur_match_len &gt;= 128 {
<a href=#238 id=238 data-nosnippet>238</a> record_match(&amp;mut d.huff, &amp;mut d.lz, cur_match_len, cur_match_dist);
<a href=#239 id=239 data-nosnippet>239</a> saved_match_len = 0;
<a href=#240 id=240 data-nosnippet>240</a> len_to_move = cur_match_len as usize;
<a href=#241 id=241 data-nosnippet>241</a> } else {
<a href=#242 id=242 data-nosnippet>242</a> saved_lit = d.dict.b.dict[cur_pos];
<a href=#243 id=243 data-nosnippet>243</a> saved_match_dist = cur_match_dist;
<a href=#244 id=244 data-nosnippet>244</a> saved_match_len = cur_match_len;
<a href=#245 id=245 data-nosnippet>245</a> }
<a href=#246 id=246 data-nosnippet>246</a> } else {
<a href=#247 id=247 data-nosnippet>247</a> record_match(&amp;mut d.huff, &amp;mut d.lz, saved_match_len, saved_match_dist);
<a href=#248 id=248 data-nosnippet>248</a> len_to_move = (saved_match_len - 1) as usize;
<a href=#249 id=249 data-nosnippet>249</a> saved_match_len = 0;
<a href=#250 id=250 data-nosnippet>250</a> }
<a href=#251 id=251 data-nosnippet>251</a> } else if cur_match_dist == 0 {
<a href=#252 id=252 data-nosnippet>252</a> record_literal(
<a href=#253 id=253 data-nosnippet>253</a> &amp;mut d.huff,
<a href=#254 id=254 data-nosnippet>254</a> &amp;mut d.lz,
<a href=#255 id=255 data-nosnippet>255</a> d.dict.b.dict[cmp::min(cur_pos, d.dict.b.dict.len() - 1)],
<a href=#256 id=256 data-nosnippet>256</a> );
<a href=#257 id=257 data-nosnippet>257</a> } else if d.params.greedy_parsing
<a href=#258 id=258 data-nosnippet>258</a> || (d.params.flags &amp; TDEFL_RLE_MATCHES != 0)
<a href=#259 id=259 data-nosnippet>259</a> || cur_match_len &gt;= 128
<a href=#260 id=260 data-nosnippet>260</a> {
<a href=#261 id=261 data-nosnippet>261</a> // If we are using lazy matching, check for matches at the next byte if the current
<a href=#262 id=262 data-nosnippet>262</a> // match was shorter than 128 bytes.
<a href=#263 id=263 data-nosnippet>263</a> record_match(&amp;mut d.huff, &amp;mut d.lz, cur_match_len, cur_match_dist);
<a href=#264 id=264 data-nosnippet>264</a> len_to_move = cur_match_len as usize;
<a href=#265 id=265 data-nosnippet>265</a> } else {
<a href=#266 id=266 data-nosnippet>266</a> saved_lit = d.dict.b.dict[cmp::min(cur_pos, d.dict.b.dict.len() - 1)];
<a href=#267 id=267 data-nosnippet>267</a> saved_match_dist = cur_match_dist;
<a href=#268 id=268 data-nosnippet>268</a> saved_match_len = cur_match_len;
<a href=#269 id=269 data-nosnippet>269</a> }
<a href=#270 id=270 data-nosnippet>270</a>
<a href=#271 id=271 data-nosnippet>271</a> lookahead_pos += len_to_move;
<a href=#272 id=272 data-nosnippet>272</a> assert!(lookahead_size &gt;= len_to_move);
<a href=#273 id=273 data-nosnippet>273</a> lookahead_size -= len_to_move;
<a href=#274 id=274 data-nosnippet>274</a> d.dict.size = cmp::min(d.dict.size + len_to_move, LZ_DICT_SIZE);
<a href=#275 id=275 data-nosnippet>275</a>
<a href=#276 id=276 data-nosnippet>276</a> let lz_buf_tight = d.lz.code_position &gt; LZ_CODE_BUF_SIZE - 8;
<a href=#277 id=277 data-nosnippet>277</a> let raw = d.params.flags &amp; TDEFL_FORCE_ALL_RAW_BLOCKS != 0;
<a href=#278 id=278 data-nosnippet>278</a> let fat = ((d.lz.code_position * 115) &gt;&gt; 7) &gt;= d.lz.total_bytes as usize;
<a href=#279 id=279 data-nosnippet>279</a> let fat_or_raw = (d.lz.total_bytes &gt; 31 * 1024) &amp;&amp; (fat || raw);
<a href=#280 id=280 data-nosnippet>280</a>
<a href=#281 id=281 data-nosnippet>281</a> if lz_buf_tight || fat_or_raw {
<a href=#282 id=282 data-nosnippet>282</a> d.params.src_pos = src_pos;
<a href=#283 id=283 data-nosnippet>283</a> // These values are used in flush_block, so we need to write them back here.
<a href=#284 id=284 data-nosnippet>284</a> d.dict.lookahead_size = lookahead_size;
<a href=#285 id=285 data-nosnippet>285</a> d.dict.lookahead_pos = lookahead_pos;
<a href=#286 id=286 data-nosnippet>286</a>
<a href=#287 id=287 data-nosnippet>287</a> let n = flush_block(d, callback, TDEFLFlush::None)
<a href=#288 id=288 data-nosnippet>288</a> .unwrap_or(TDEFLStatus::PutBufFailed as i32);
<a href=#289 id=289 data-nosnippet>289</a> if n != 0 {
<a href=#290 id=290 data-nosnippet>290</a> d.params.saved_lit = saved_lit;
<a href=#291 id=291 data-nosnippet>291</a> d.params.saved_match_dist = saved_match_dist;
<a href=#292 id=292 data-nosnippet>292</a> d.params.saved_match_len = saved_match_len;
<a href=#293 id=293 data-nosnippet>293</a> return n &gt; 0;
<a href=#294 id=294 data-nosnippet>294</a> }
<a href=#295 id=295 data-nosnippet>295</a> }
<a href=#296 id=296 data-nosnippet>296</a> }
<a href=#297 id=297 data-nosnippet>297</a>
<a href=#298 id=298 data-nosnippet>298</a> d.params.src_pos = src_pos;
<a href=#299 id=299 data-nosnippet>299</a> d.dict.lookahead_size = lookahead_size;
<a href=#300 id=300 data-nosnippet>300</a> d.dict.lookahead_pos = lookahead_pos;
<a href=#301 id=301 data-nosnippet>301</a> d.params.saved_lit = saved_lit;
<a href=#302 id=302 data-nosnippet>302</a> d.params.saved_match_dist = saved_match_dist;
<a href=#303 id=303 data-nosnippet>303</a> d.params.saved_match_len = saved_match_len;
<a href=#304 id=304 data-nosnippet>304</a> true
<a href=#305 id=305 data-nosnippet>305</a>}*/
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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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/deflate/stream.rs`."><title>stream.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/deflate/</div>stream.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! Extra streaming compression functionality.
<a href=#2 id=2 data-nosnippet>2</a>//!
<a href=#3 id=3 data-nosnippet>3</a>//! As of now this is mainly intended for use to build a higher-level wrapper.
<a href=#4 id=4 data-nosnippet>4</a>//!
<a href=#5 id=5 data-nosnippet>5</a>//! There is no DeflateState as the needed state is contained in the compressor struct itself.
<a href=#6 id=6 data-nosnippet>6</a>
<a href=#7 id=7 data-nosnippet>7</a></span><span class="kw">use </span><span class="kw">crate</span>::deflate::core::{compress, CompressorOxide, TDEFLFlush, TDEFLStatus};
<a href=#8 id=8 data-nosnippet>8</a><span class="kw">use crate</span>::{MZError, MZFlush, MZStatus, StreamResult};
<a href=#9 id=9 data-nosnippet>9</a>
<a href=#10 id=10 data-nosnippet>10</a><span class="doccomment">/// Try to compress from input to output with the given [`CompressorOxide`].
<a href=#11 id=11 data-nosnippet>11</a>///
<a href=#12 id=12 data-nosnippet>12</a>/// # Errors
<a href=#13 id=13 data-nosnippet>13</a>///
<a href=#14 id=14 data-nosnippet>14</a>/// Returns [`MZError::Buf`] If the size of the `output` slice is empty or no progress was made due
<a href=#15 id=15 data-nosnippet>15</a>/// to lack of expected input data, or if called without [`MZFlush::Finish`] after the compression
<a href=#16 id=16 data-nosnippet>16</a>/// was already finished.
<a href=#17 id=17 data-nosnippet>17</a>///
<a href=#18 id=18 data-nosnippet>18</a>/// Returns [`MZError::Param`] if the compressor parameters are set wrong.
<a href=#19 id=19 data-nosnippet>19</a>///
<a href=#20 id=20 data-nosnippet>20</a>/// Returns [`MZError::Stream`] when lower-level decompressor returns a
<a href=#21 id=21 data-nosnippet>21</a>/// [`TDEFLStatus::PutBufFailed`]; may not actually be possible.
<a href=#22 id=22 data-nosnippet>22</a></span><span class="kw">pub fn </span>deflate(
<a href=#23 id=23 data-nosnippet>23</a> compressor: <span class="kw-2">&amp;mut </span>CompressorOxide,
<a href=#24 id=24 data-nosnippet>24</a> input: <span class="kw-2">&amp;</span>[u8],
<a href=#25 id=25 data-nosnippet>25</a> output: <span class="kw-2">&amp;mut </span>[u8],
<a href=#26 id=26 data-nosnippet>26</a> flush: MZFlush,
<a href=#27 id=27 data-nosnippet>27</a>) -&gt; StreamResult {
<a href=#28 id=28 data-nosnippet>28</a> <span class="kw">if </span>output.is_empty() {
<a href=#29 id=29 data-nosnippet>29</a> <span class="kw">return </span>StreamResult::error(MZError::Buf);
<a href=#30 id=30 data-nosnippet>30</a> }
<a href=#31 id=31 data-nosnippet>31</a>
<a href=#32 id=32 data-nosnippet>32</a> <span class="kw">if </span>compressor.prev_return_status() == TDEFLStatus::Done {
<a href=#33 id=33 data-nosnippet>33</a> <span class="kw">return if </span>flush == MZFlush::Finish {
<a href=#34 id=34 data-nosnippet>34</a> StreamResult {
<a href=#35 id=35 data-nosnippet>35</a> bytes_written: <span class="number">0</span>,
<a href=#36 id=36 data-nosnippet>36</a> bytes_consumed: <span class="number">0</span>,
<a href=#37 id=37 data-nosnippet>37</a> status: <span class="prelude-val">Ok</span>(MZStatus::StreamEnd),
<a href=#38 id=38 data-nosnippet>38</a> }
<a href=#39 id=39 data-nosnippet>39</a> } <span class="kw">else </span>{
<a href=#40 id=40 data-nosnippet>40</a> StreamResult::error(MZError::Buf)
<a href=#41 id=41 data-nosnippet>41</a> };
<a href=#42 id=42 data-nosnippet>42</a> }
<a href=#43 id=43 data-nosnippet>43</a>
<a href=#44 id=44 data-nosnippet>44</a> <span class="kw">let </span><span class="kw-2">mut </span>bytes_written = <span class="number">0</span>;
<a href=#45 id=45 data-nosnippet>45</a> <span class="kw">let </span><span class="kw-2">mut </span>bytes_consumed = <span class="number">0</span>;
<a href=#46 id=46 data-nosnippet>46</a>
<a href=#47 id=47 data-nosnippet>47</a> <span class="kw">let </span><span class="kw-2">mut </span>next_in = input;
<a href=#48 id=48 data-nosnippet>48</a> <span class="kw">let </span><span class="kw-2">mut </span>next_out = output;
<a href=#49 id=49 data-nosnippet>49</a>
<a href=#50 id=50 data-nosnippet>50</a> <span class="kw">let </span>status = <span class="kw">loop </span>{
<a href=#51 id=51 data-nosnippet>51</a> <span class="kw">let </span>in_bytes;
<a href=#52 id=52 data-nosnippet>52</a> <span class="kw">let </span>out_bytes;
<a href=#53 id=53 data-nosnippet>53</a> <span class="kw">let </span>defl_status = {
<a href=#54 id=54 data-nosnippet>54</a> <span class="kw">let </span>res = compress(compressor, next_in, next_out, TDEFLFlush::from(flush));
<a href=#55 id=55 data-nosnippet>55</a> in_bytes = res.<span class="number">1</span>;
<a href=#56 id=56 data-nosnippet>56</a> out_bytes = res.<span class="number">2</span>;
<a href=#57 id=57 data-nosnippet>57</a> res.<span class="number">0
<a href=#58 id=58 data-nosnippet>58</a> </span>};
<a href=#59 id=59 data-nosnippet>59</a>
<a href=#60 id=60 data-nosnippet>60</a> next_in = <span class="kw-2">&amp;</span>next_in[in_bytes..];
<a href=#61 id=61 data-nosnippet>61</a> next_out = <span class="kw-2">&amp;mut </span>next_out[out_bytes..];
<a href=#62 id=62 data-nosnippet>62</a> bytes_consumed += in_bytes;
<a href=#63 id=63 data-nosnippet>63</a> bytes_written += out_bytes;
<a href=#64 id=64 data-nosnippet>64</a>
<a href=#65 id=65 data-nosnippet>65</a> <span class="comment">// Check if we are done, or compression failed.
<a href=#66 id=66 data-nosnippet>66</a> </span><span class="kw">match </span>defl_status {
<a href=#67 id=67 data-nosnippet>67</a> TDEFLStatus::BadParam =&gt; <span class="kw">break </span><span class="prelude-val">Err</span>(MZError::Param),
<a href=#68 id=68 data-nosnippet>68</a> <span class="comment">// Don't think this can happen as we're not using a custom callback.
<a href=#69 id=69 data-nosnippet>69</a> </span>TDEFLStatus::PutBufFailed =&gt; <span class="kw">break </span><span class="prelude-val">Err</span>(MZError::Stream),
<a href=#70 id=70 data-nosnippet>70</a> TDEFLStatus::Done =&gt; <span class="kw">break </span><span class="prelude-val">Ok</span>(MZStatus::StreamEnd),
<a href=#71 id=71 data-nosnippet>71</a> <span class="kw">_ </span>=&gt; (),
<a href=#72 id=72 data-nosnippet>72</a> };
<a href=#73 id=73 data-nosnippet>73</a>
<a href=#74 id=74 data-nosnippet>74</a> <span class="comment">// All the output space was used, so wait for more.
<a href=#75 id=75 data-nosnippet>75</a> </span><span class="kw">if </span>next_out.is_empty() {
<a href=#76 id=76 data-nosnippet>76</a> <span class="kw">break </span><span class="prelude-val">Ok</span>(MZStatus::Ok);
<a href=#77 id=77 data-nosnippet>77</a> }
<a href=#78 id=78 data-nosnippet>78</a>
<a href=#79 id=79 data-nosnippet>79</a> <span class="kw">if </span>next_in.is_empty() &amp;&amp; (<span class="macro">flush !</span>= MZFlush::Finish) {
<a href=#80 id=80 data-nosnippet>80</a> <span class="kw">let </span>total_changed = bytes_written &gt; <span class="number">0 </span>|| bytes_consumed &gt; <span class="number">0</span>;
<a href=#81 id=81 data-nosnippet>81</a>
<a href=#82 id=82 data-nosnippet>82</a> <span class="kw">break if </span>(<span class="macro">flush !</span>= MZFlush::None) || total_changed {
<a href=#83 id=83 data-nosnippet>83</a> <span class="comment">// We wrote or consumed something, and/or did a flush (sync/partial etc.).
<a href=#84 id=84 data-nosnippet>84</a> </span><span class="prelude-val">Ok</span>(MZStatus::Ok)
<a href=#85 id=85 data-nosnippet>85</a> } <span class="kw">else </span>{
<a href=#86 id=86 data-nosnippet>86</a> <span class="comment">// No more input data, not flushing, and nothing was consumed or written,
<a href=#87 id=87 data-nosnippet>87</a> // so couldn't make any progress.
<a href=#88 id=88 data-nosnippet>88</a> </span><span class="prelude-val">Err</span>(MZError::Buf)
<a href=#89 id=89 data-nosnippet>89</a> };
<a href=#90 id=90 data-nosnippet>90</a> }
<a href=#91 id=91 data-nosnippet>91</a> };
<a href=#92 id=92 data-nosnippet>92</a> StreamResult {
<a href=#93 id=93 data-nosnippet>93</a> bytes_consumed,
<a href=#94 id=94 data-nosnippet>94</a> bytes_written,
<a href=#95 id=95 data-nosnippet>95</a> status,
<a href=#96 id=96 data-nosnippet>96</a> }
<a href=#97 id=97 data-nosnippet>97</a>}
<a href=#98 id=98 data-nosnippet>98</a>
<a href=#99 id=99 data-nosnippet>99</a><span class="attr">#[cfg(test)]
<a href=#100 id=100 data-nosnippet>100</a></span><span class="kw">mod </span>test {
<a href=#101 id=101 data-nosnippet>101</a> <span class="kw">use </span><span class="kw">super</span>::deflate;
<a href=#102 id=102 data-nosnippet>102</a> <span class="kw">use </span><span class="kw">crate</span>::deflate::CompressorOxide;
<a href=#103 id=103 data-nosnippet>103</a> <span class="kw">use </span><span class="kw">crate</span>::inflate::decompress_to_vec_zlib;
<a href=#104 id=104 data-nosnippet>104</a> <span class="kw">use crate</span>::{MZFlush, MZStatus};
<a href=#105 id=105 data-nosnippet>105</a> <span class="kw">use </span>alloc::boxed::Box;
<a href=#106 id=106 data-nosnippet>106</a> <span class="kw">use </span>alloc::vec;
<a href=#107 id=107 data-nosnippet>107</a>
<a href=#108 id=108 data-nosnippet>108</a> <span class="attr">#[test]
<a href=#109 id=109 data-nosnippet>109</a> </span><span class="kw">fn </span>test_state() {
<a href=#110 id=110 data-nosnippet>110</a> <span class="kw">let </span>data = <span class="string">b"Hello zlib!"</span>;
<a href=#111 id=111 data-nosnippet>111</a> <span class="kw">let </span><span class="kw-2">mut </span>compressed = <span class="macro">vec!</span>[<span class="number">0</span>; <span class="number">50</span>];
<a href=#112 id=112 data-nosnippet>112</a> <span class="kw">let </span><span class="kw-2">mut </span>compressor = Box::&lt;CompressorOxide&gt;::default();
<a href=#113 id=113 data-nosnippet>113</a> <span class="kw">let </span>res = deflate(<span class="kw-2">&amp;mut </span>compressor, data, <span class="kw-2">&amp;mut </span>compressed, MZFlush::Finish);
<a href=#114 id=114 data-nosnippet>114</a> <span class="kw">let </span>status = res.status.expect(<span class="string">"Failed to compress!"</span>);
<a href=#115 id=115 data-nosnippet>115</a> <span class="kw">let </span>decomp =
<a href=#116 id=116 data-nosnippet>116</a> decompress_to_vec_zlib(<span class="kw-2">&amp;</span>compressed).expect(<span class="string">"Failed to decompress compressed data"</span>);
<a href=#117 id=117 data-nosnippet>117</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#118 id=118 data-nosnippet>118</a> <span class="macro">assert_eq!</span>(decomp[..], data[..]);
<a href=#119 id=119 data-nosnippet>119</a> <span class="macro">assert_eq!</span>(res.bytes_consumed, data.len());
<a href=#120 id=120 data-nosnippet>120</a> }
<a href=#121 id=121 data-nosnippet>121</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/deflate/zlib.rs`."><title>zlib.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/deflate/</div>zlib.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span><span class="kw">crate</span>::deflate::core::deflate_flags::{
<a href=#2 id=2 data-nosnippet>2</a> TDEFL_FORCE_ALL_RAW_BLOCKS, TDEFL_GREEDY_PARSING_FLAG, TDEFL_RLE_MATCHES,
<a href=#3 id=3 data-nosnippet>3</a>};
<a href=#4 id=4 data-nosnippet>4</a>
<a href=#5 id=5 data-nosnippet>5</a><span class="kw">const </span>DEFAULT_CM: u8 = <span class="number">8</span>;
<a href=#6 id=6 data-nosnippet>6</a><span class="kw">const </span>DEFAULT_CINFO: u8 = <span class="number">7 </span>&lt;&lt; <span class="number">4</span>;
<a href=#7 id=7 data-nosnippet>7</a><span class="kw">const </span>_DEFAULT_FDICT: u8 = <span class="number">0</span>;
<a href=#8 id=8 data-nosnippet>8</a><span class="kw">const </span>DEFAULT_CMF: u8 = DEFAULT_CM | DEFAULT_CINFO;
<a href=#9 id=9 data-nosnippet>9</a><span class="comment">// CMF used for RLE (technically it uses a window size of 0 but the lowest that can
<a href=#10 id=10 data-nosnippet>10</a>// be specified in the header corresponds to a window size of 1 &lt;&lt; (0 + 8) aka 256.
<a href=#11 id=11 data-nosnippet>11</a></span><span class="kw">const </span>MIN_CMF: u8 = DEFAULT_CM; <span class="comment">// | 0
<a href=#12 id=12 data-nosnippet>12</a></span><span class="doccomment">/// The 16-bit value consisting of CMF and FLG must be divisible by this to be valid.
<a href=#13 id=13 data-nosnippet>13</a></span><span class="kw">const </span>FCHECK_DIVISOR: u8 = <span class="number">31</span>;
<a href=#14 id=14 data-nosnippet>14</a>
<a href=#15 id=15 data-nosnippet>15</a><span class="doccomment">/// Generate FCHECK from CMF and FLG (without FCKECH )so that they are correct according to the
<a href=#16 id=16 data-nosnippet>16</a>/// specification, i.e (CMF*256 + FCHK) % 31 = 0.
<a href=#17 id=17 data-nosnippet>17</a>/// Returns flg with the FCHKECK bits added (any existing FCHECK bits are ignored).
<a href=#18 id=18 data-nosnippet>18</a></span><span class="attr">#[inline]
<a href=#19 id=19 data-nosnippet>19</a></span><span class="kw">fn </span>add_fcheck(cmf: u8, flg: u8) -&gt; u8 {
<a href=#20 id=20 data-nosnippet>20</a> <span class="kw">let </span>rem = ((usize::from(cmf) * <span class="number">256</span>) + usize::from(flg)) % usize::from(FCHECK_DIVISOR);
<a href=#21 id=21 data-nosnippet>21</a>
<a href=#22 id=22 data-nosnippet>22</a> <span class="comment">// Clear existing FCHECK if any
<a href=#23 id=23 data-nosnippet>23</a> </span><span class="kw">let </span>flg = flg &amp; <span class="number">0b11100000</span>;
<a href=#24 id=24 data-nosnippet>24</a>
<a href=#25 id=25 data-nosnippet>25</a> <span class="comment">// Casting is safe as rem can't overflow since it is a value mod 31
<a href=#26 id=26 data-nosnippet>26</a> // We can simply add the value to flg as (31 - rem) will never be above 2^5
<a href=#27 id=27 data-nosnippet>27</a> </span>flg + (FCHECK_DIVISOR - rem <span class="kw">as </span>u8)
<a href=#28 id=28 data-nosnippet>28</a>}
<a href=#29 id=29 data-nosnippet>29</a>
<a href=#30 id=30 data-nosnippet>30</a><span class="attr">#[inline]
<a href=#31 id=31 data-nosnippet>31</a></span><span class="kw">const fn </span>zlib_level_from_flags(flags: u32) -&gt; u8 {
<a href=#32 id=32 data-nosnippet>32</a> <span class="kw">use </span><span class="kw">crate</span>::deflate::core::NUM_PROBES;
<a href=#33 id=33 data-nosnippet>33</a>
<a href=#34 id=34 data-nosnippet>34</a> <span class="kw">let </span>num_probes = flags &amp; <span class="kw">super</span>::MAX_PROBES_MASK;
<a href=#35 id=35 data-nosnippet>35</a> <span class="kw">if </span>(flags &amp; <span class="macro">TDEFL_GREEDY_PARSING_FLAG !</span>= <span class="number">0</span>) || (flags &amp; <span class="macro">TDEFL_RLE_MATCHES !</span>= <span class="number">0</span>) {
<a href=#36 id=36 data-nosnippet>36</a> <span class="kw">if </span>num_probes &lt;= <span class="number">1 </span>{
<a href=#37 id=37 data-nosnippet>37</a> <span class="number">0
<a href=#38 id=38 data-nosnippet>38</a> </span>} <span class="kw">else </span>{
<a href=#39 id=39 data-nosnippet>39</a> <span class="number">1
<a href=#40 id=40 data-nosnippet>40</a> </span>}
<a href=#41 id=41 data-nosnippet>41</a> } <span class="kw">else if </span>num_probes &gt;= NUM_PROBES[<span class="number">9</span>] <span class="kw">as </span>u32 {
<a href=#42 id=42 data-nosnippet>42</a> <span class="number">3
<a href=#43 id=43 data-nosnippet>43</a> </span>} <span class="kw">else </span>{
<a href=#44 id=44 data-nosnippet>44</a> <span class="number">2
<a href=#45 id=45 data-nosnippet>45</a> </span>}
<a href=#46 id=46 data-nosnippet>46</a>}
<a href=#47 id=47 data-nosnippet>47</a>
<a href=#48 id=48 data-nosnippet>48</a><span class="attr">#[inline]
<a href=#49 id=49 data-nosnippet>49</a></span><span class="kw">const fn </span>cmf_from_flags(flags: u32) -&gt; u8 {
<a href=#50 id=50 data-nosnippet>50</a> <span class="kw">if </span>(flags &amp; TDEFL_RLE_MATCHES == <span class="number">0</span>) &amp;&amp; (flags &amp; TDEFL_FORCE_ALL_RAW_BLOCKS == <span class="number">0</span>) {
<a href=#51 id=51 data-nosnippet>51</a> DEFAULT_CMF
<a href=#52 id=52 data-nosnippet>52</a> <span class="comment">// If we are using RLE encoding or no compression the window bits can be set as the
<a href=#53 id=53 data-nosnippet>53</a> // minimum.
<a href=#54 id=54 data-nosnippet>54</a> </span>} <span class="kw">else </span>{
<a href=#55 id=55 data-nosnippet>55</a> MIN_CMF
<a href=#56 id=56 data-nosnippet>56</a> }
<a href=#57 id=57 data-nosnippet>57</a>}
<a href=#58 id=58 data-nosnippet>58</a>
<a href=#59 id=59 data-nosnippet>59</a><span class="doccomment">/// Get the zlib header for the level using the default window size and no
<a href=#60 id=60 data-nosnippet>60</a>/// dictionary.
<a href=#61 id=61 data-nosnippet>61</a></span><span class="attr">#[inline]
<a href=#62 id=62 data-nosnippet>62</a></span><span class="kw">fn </span>header_from_level(level: u8, flags: u32) -&gt; [u8; <span class="number">2</span>] {
<a href=#63 id=63 data-nosnippet>63</a> <span class="kw">let </span>cmf = cmf_from_flags(flags);
<a href=#64 id=64 data-nosnippet>64</a> [cmf, add_fcheck(cmf, level &lt;&lt; <span class="number">6</span>)]
<a href=#65 id=65 data-nosnippet>65</a>}
<a href=#66 id=66 data-nosnippet>66</a>
<a href=#67 id=67 data-nosnippet>67</a><span class="doccomment">/// Create a zlib header from the given compression flags.
<a href=#68 id=68 data-nosnippet>68</a>/// Only level is considered.
<a href=#69 id=69 data-nosnippet>69</a></span><span class="attr">#[inline]
<a href=#70 id=70 data-nosnippet>70</a></span><span class="kw">pub fn </span>header_from_flags(flags: u32) -&gt; [u8; <span class="number">2</span>] {
<a href=#71 id=71 data-nosnippet>71</a> <span class="kw">let </span>level = zlib_level_from_flags(flags);
<a href=#72 id=72 data-nosnippet>72</a> header_from_level(level, flags)
<a href=#73 id=73 data-nosnippet>73</a>}
<a href=#74 id=74 data-nosnippet>74</a>
<a href=#75 id=75 data-nosnippet>75</a><span class="attr">#[cfg(test)]
<a href=#76 id=76 data-nosnippet>76</a></span><span class="kw">mod </span>test {
<a href=#77 id=77 data-nosnippet>77</a> <span class="kw">use </span><span class="kw">crate</span>::shared::MZ_DEFAULT_WINDOW_BITS;
<a href=#78 id=78 data-nosnippet>78</a> <span class="attr">#[test]
<a href=#79 id=79 data-nosnippet>79</a> </span><span class="kw">fn </span>zlib() {
<a href=#80 id=80 data-nosnippet>80</a> <span class="kw">use </span><span class="kw">super</span>::<span class="kw">super</span>::<span class="kw-2">*</span>;
<a href=#81 id=81 data-nosnippet>81</a> <span class="kw">use super</span>::<span class="kw-2">*</span>;
<a href=#82 id=82 data-nosnippet>82</a>
<a href=#83 id=83 data-nosnippet>83</a> <span class="kw">let </span>test_level = |level, expected| {
<a href=#84 id=84 data-nosnippet>84</a> <span class="kw">let </span>flags = create_comp_flags_from_zip_params(
<a href=#85 id=85 data-nosnippet>85</a> level,
<a href=#86 id=86 data-nosnippet>86</a> MZ_DEFAULT_WINDOW_BITS,
<a href=#87 id=87 data-nosnippet>87</a> CompressionStrategy::Default <span class="kw">as </span>i32,
<a href=#88 id=88 data-nosnippet>88</a> );
<a href=#89 id=89 data-nosnippet>89</a> <span class="macro">assert_eq!</span>(zlib_level_from_flags(flags), expected);
<a href=#90 id=90 data-nosnippet>90</a> };
<a href=#91 id=91 data-nosnippet>91</a>
<a href=#92 id=92 data-nosnippet>92</a> <span class="macro">assert_eq!</span>(zlib_level_from_flags(DEFAULT_FLAGS), <span class="number">2</span>);
<a href=#93 id=93 data-nosnippet>93</a> test_level(<span class="number">0</span>, <span class="number">0</span>);
<a href=#94 id=94 data-nosnippet>94</a> test_level(<span class="number">1</span>, <span class="number">0</span>);
<a href=#95 id=95 data-nosnippet>95</a> test_level(<span class="number">2</span>, <span class="number">1</span>);
<a href=#96 id=96 data-nosnippet>96</a> test_level(<span class="number">3</span>, <span class="number">1</span>);
<a href=#97 id=97 data-nosnippet>97</a> <span class="kw">for </span>i <span class="kw">in </span><span class="number">4</span>..=<span class="number">8 </span>{
<a href=#98 id=98 data-nosnippet>98</a> test_level(i, <span class="number">2</span>)
<a href=#99 id=99 data-nosnippet>99</a> }
<a href=#100 id=100 data-nosnippet>100</a> test_level(<span class="number">9</span>, <span class="number">3</span>);
<a href=#101 id=101 data-nosnippet>101</a> test_level(<span class="number">10</span>, <span class="number">3</span>);
<a href=#102 id=102 data-nosnippet>102</a> }
<a href=#103 id=103 data-nosnippet>103</a>
<a href=#104 id=104 data-nosnippet>104</a> <span class="attr">#[test]
<a href=#105 id=105 data-nosnippet>105</a> </span><span class="kw">fn </span>test_header() {
<a href=#106 id=106 data-nosnippet>106</a> <span class="kw">let </span>header = <span class="kw">super</span>::header_from_level(<span class="number">3</span>, <span class="number">0</span>);
<a href=#107 id=107 data-nosnippet>107</a> <span class="macro">assert_eq!</span>(
<a href=#108 id=108 data-nosnippet>108</a> ((usize::from(header[<span class="number">0</span>]) * <span class="number">256</span>) + usize::from(header[<span class="number">1</span>])) % <span class="number">31</span>,
<a href=#109 id=109 data-nosnippet>109</a> <span class="number">0
<a href=#110 id=110 data-nosnippet>110</a> </span>);
<a href=#111 id=111 data-nosnippet>111</a> }
<a href=#112 id=112 data-nosnippet>112</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/inflate/mod.rs`."><title>mod.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/inflate/</div>mod.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! This module contains functionality for decompression.
<a href=#2 id=2 data-nosnippet>2</a>
<a href=#3 id=3 data-nosnippet>3</a></span><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#4 id=4 data-nosnippet>4</a></span><span class="kw">use </span><span class="kw">crate</span>::alloc::{boxed::Box, vec, vec::Vec};
<a href=#5 id=5 data-nosnippet>5</a><span class="attr">#[cfg(all(feature = <span class="string">"std"</span>, feature = <span class="string">"with-alloc"</span>))]
<a href=#6 id=6 data-nosnippet>6</a></span><span class="kw">use </span>std::error::Error;
<a href=#7 id=7 data-nosnippet>7</a>
<a href=#8 id=8 data-nosnippet>8</a><span class="kw">pub mod </span>core;
<a href=#9 id=9 data-nosnippet>9</a><span class="kw">mod </span>output_buffer;
<a href=#10 id=10 data-nosnippet>10</a><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#11 id=11 data-nosnippet>11</a></span><span class="kw">pub mod </span>stream;
<a href=#12 id=12 data-nosnippet>12</a><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#13 id=13 data-nosnippet>13</a></span><span class="kw">use </span><span class="self">self</span>::core::<span class="kw-2">*</span>;
<a href=#14 id=14 data-nosnippet>14</a>
<a href=#15 id=15 data-nosnippet>15</a><span class="kw">const </span>TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS: i32 = -<span class="number">4</span>;
<a href=#16 id=16 data-nosnippet>16</a><span class="kw">const </span>TINFL_STATUS_BAD_PARAM: i32 = -<span class="number">3</span>;
<a href=#17 id=17 data-nosnippet>17</a><span class="kw">const </span>TINFL_STATUS_ADLER32_MISMATCH: i32 = -<span class="number">2</span>;
<a href=#18 id=18 data-nosnippet>18</a><span class="kw">const </span>TINFL_STATUS_FAILED: i32 = -<span class="number">1</span>;
<a href=#19 id=19 data-nosnippet>19</a><span class="kw">const </span>TINFL_STATUS_DONE: i32 = <span class="number">0</span>;
<a href=#20 id=20 data-nosnippet>20</a><span class="kw">const </span>TINFL_STATUS_NEEDS_MORE_INPUT: i32 = <span class="number">1</span>;
<a href=#21 id=21 data-nosnippet>21</a><span class="kw">const </span>TINFL_STATUS_HAS_MORE_OUTPUT: i32 = <span class="number">2</span>;
<a href=#22 id=22 data-nosnippet>22</a><span class="attr">#[cfg(feature = <span class="string">"block-boundary"</span>)]
<a href=#23 id=23 data-nosnippet>23</a></span><span class="kw">const </span>TINFL_STATUS_BLOCK_BOUNDARY: i32 = <span class="number">3</span>;
<a href=#24 id=24 data-nosnippet>24</a>
<a href=#25 id=25 data-nosnippet>25</a><span class="doccomment">/// Return status codes.
<a href=#26 id=26 data-nosnippet>26</a></span><span class="attr">#[repr(i8)]
<a href=#27 id=27 data-nosnippet>27</a>#[cfg_attr(not(feature = <span class="string">"rustc-dep-of-std"</span>), derive(Hash, Debug))]
<a href=#28 id=28 data-nosnippet>28</a>#[derive(Copy, Clone, PartialEq, Eq)]
<a href=#29 id=29 data-nosnippet>29</a></span><span class="kw">pub enum </span>TINFLStatus {
<a href=#30 id=30 data-nosnippet>30</a> <span class="doccomment">/// More input data was expected, but the caller indicated that there was no more data, so the
<a href=#31 id=31 data-nosnippet>31</a> /// input stream is likely truncated.
<a href=#32 id=32 data-nosnippet>32</a> ///
<a href=#33 id=33 data-nosnippet>33</a> /// This can't happen if you have provided the
<a href=#34 id=34 data-nosnippet>34</a> /// [`TINFL_FLAG_HAS_MORE_INPUT`][core::inflate_flags::TINFL_FLAG_HAS_MORE_INPUT] flag to the
<a href=#35 id=35 data-nosnippet>35</a> /// decompression. By setting that flag, you indicate more input exists but is not provided,
<a href=#36 id=36 data-nosnippet>36</a> /// and so reaching the end of the input data without finding the end of the compressed stream
<a href=#37 id=37 data-nosnippet>37</a> /// would instead return a [`NeedsMoreInput`][Self::NeedsMoreInput] status.
<a href=#38 id=38 data-nosnippet>38</a> </span>FailedCannotMakeProgress = TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS <span class="kw">as </span>i8,
<a href=#39 id=39 data-nosnippet>39</a>
<a href=#40 id=40 data-nosnippet>40</a> <span class="doccomment">/// The output buffer is an invalid size; consider the `flags` parameter.
<a href=#41 id=41 data-nosnippet>41</a> </span>BadParam = TINFL_STATUS_BAD_PARAM <span class="kw">as </span>i8,
<a href=#42 id=42 data-nosnippet>42</a>
<a href=#43 id=43 data-nosnippet>43</a> <span class="doccomment">/// The decompression went fine, but the adler32 checksum did not match the one
<a href=#44 id=44 data-nosnippet>44</a> /// provided in the header.
<a href=#45 id=45 data-nosnippet>45</a> </span>Adler32Mismatch = TINFL_STATUS_ADLER32_MISMATCH <span class="kw">as </span>i8,
<a href=#46 id=46 data-nosnippet>46</a>
<a href=#47 id=47 data-nosnippet>47</a> <span class="doccomment">/// Failed to decompress due to invalid data.
<a href=#48 id=48 data-nosnippet>48</a> </span>Failed = TINFL_STATUS_FAILED <span class="kw">as </span>i8,
<a href=#49 id=49 data-nosnippet>49</a>
<a href=#50 id=50 data-nosnippet>50</a> <span class="doccomment">/// Finished decompression without issues.
<a href=#51 id=51 data-nosnippet>51</a> ///
<a href=#52 id=52 data-nosnippet>52</a> /// This indicates the end of the compressed stream has been reached.
<a href=#53 id=53 data-nosnippet>53</a> </span>Done = TINFL_STATUS_DONE <span class="kw">as </span>i8,
<a href=#54 id=54 data-nosnippet>54</a>
<a href=#55 id=55 data-nosnippet>55</a> <span class="doccomment">/// The decompressor needs more input data to continue decompressing.
<a href=#56 id=56 data-nosnippet>56</a> ///
<a href=#57 id=57 data-nosnippet>57</a> /// This occurs when there's no more consumable input, but the end of the stream hasn't been
<a href=#58 id=58 data-nosnippet>58</a> /// reached, and you have supplied the
<a href=#59 id=59 data-nosnippet>59</a> /// [`TINFL_FLAG_HAS_MORE_INPUT`][core::inflate_flags::TINFL_FLAG_HAS_MORE_INPUT] flag to the
<a href=#60 id=60 data-nosnippet>60</a> /// decompressor. Had you not supplied that flag (which would mean you were asserting that you
<a href=#61 id=61 data-nosnippet>61</a> /// believed all the data was available) you would have gotten a
<a href=#62 id=62 data-nosnippet>62</a> /// [`FailedCannotMakeProcess`][Self::FailedCannotMakeProgress] instead.
<a href=#63 id=63 data-nosnippet>63</a> </span>NeedsMoreInput = TINFL_STATUS_NEEDS_MORE_INPUT <span class="kw">as </span>i8,
<a href=#64 id=64 data-nosnippet>64</a>
<a href=#65 id=65 data-nosnippet>65</a> <span class="doccomment">/// There is still pending data that didn't fit in the output buffer.
<a href=#66 id=66 data-nosnippet>66</a> </span>HasMoreOutput = TINFL_STATUS_HAS_MORE_OUTPUT <span class="kw">as </span>i8,
<a href=#67 id=67 data-nosnippet>67</a>
<a href=#68 id=68 data-nosnippet>68</a> <span class="doccomment">/// Reached the end of a deflate block, and the start of the next block.
<a href=#69 id=69 data-nosnippet>69</a> ///
<a href=#70 id=70 data-nosnippet>70</a> /// At this point, you can suspend decompression and later resume with a new `DecompressorOxide`.
<a href=#71 id=71 data-nosnippet>71</a> /// The only state that must be preserved is [`DecompressorOxide::block_boundary_state()`],
<a href=#72 id=72 data-nosnippet>72</a> /// plus the last 32KiB of the output buffer (or less if you know the stream was compressed with
<a href=#73 id=73 data-nosnippet>73</a> /// a smaller window size).
<a href=#74 id=74 data-nosnippet>74</a> ///
<a href=#75 id=75 data-nosnippet>75</a> /// This is only returned if you use the
<a href=#76 id=76 data-nosnippet>76</a> /// [`TINFL_FLAG_STOP_ON_BLOCK_BOUNDARY`][core::inflate_flags::TINFL_FLAG_STOP_ON_BLOCK_BOUNDARY] flag.
<a href=#77 id=77 data-nosnippet>77</a> </span><span class="attr">#[cfg(feature = <span class="string">"block-boundary"</span>)]
<a href=#78 id=78 data-nosnippet>78</a> </span>BlockBoundary = TINFL_STATUS_BLOCK_BOUNDARY <span class="kw">as </span>i8,
<a href=#79 id=79 data-nosnippet>79</a>}
<a href=#80 id=80 data-nosnippet>80</a>
<a href=#81 id=81 data-nosnippet>81</a><span class="kw">impl </span>TINFLStatus {
<a href=#82 id=82 data-nosnippet>82</a> <span class="kw">pub fn </span>from_i32(value: i32) -&gt; <span class="prelude-ty">Option</span>&lt;TINFLStatus&gt; {
<a href=#83 id=83 data-nosnippet>83</a> <span class="kw">use </span><span class="self">self</span>::TINFLStatus::<span class="kw-2">*</span>;
<a href=#84 id=84 data-nosnippet>84</a> <span class="kw">match </span>value {
<a href=#85 id=85 data-nosnippet>85</a> TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS =&gt; <span class="prelude-val">Some</span>(FailedCannotMakeProgress),
<a href=#86 id=86 data-nosnippet>86</a> TINFL_STATUS_BAD_PARAM =&gt; <span class="prelude-val">Some</span>(BadParam),
<a href=#87 id=87 data-nosnippet>87</a> TINFL_STATUS_ADLER32_MISMATCH =&gt; <span class="prelude-val">Some</span>(Adler32Mismatch),
<a href=#88 id=88 data-nosnippet>88</a> TINFL_STATUS_FAILED =&gt; <span class="prelude-val">Some</span>(Failed),
<a href=#89 id=89 data-nosnippet>89</a> TINFL_STATUS_DONE =&gt; <span class="prelude-val">Some</span>(Done),
<a href=#90 id=90 data-nosnippet>90</a> TINFL_STATUS_NEEDS_MORE_INPUT =&gt; <span class="prelude-val">Some</span>(NeedsMoreInput),
<a href=#91 id=91 data-nosnippet>91</a> TINFL_STATUS_HAS_MORE_OUTPUT =&gt; <span class="prelude-val">Some</span>(HasMoreOutput),
<a href=#92 id=92 data-nosnippet>92</a> <span class="attr">#[cfg(feature = <span class="string">"block-boundary"</span>)]
<a href=#93 id=93 data-nosnippet>93</a> </span>TINFL_STATUS_BLOCK_BOUNDARY =&gt; <span class="prelude-val">Some</span>(BlockBoundary),
<a href=#94 id=94 data-nosnippet>94</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#95 id=95 data-nosnippet>95</a> }
<a href=#96 id=96 data-nosnippet>96</a> }
<a href=#97 id=97 data-nosnippet>97</a>}
<a href=#98 id=98 data-nosnippet>98</a>
<a href=#99 id=99 data-nosnippet>99</a><span class="doccomment">/// Struct return when decompress_to_vec functions fail.
<a href=#100 id=100 data-nosnippet>100</a></span><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#101 id=101 data-nosnippet>101</a>#[derive(Debug)]
<a href=#102 id=102 data-nosnippet>102</a></span><span class="kw">pub struct </span>DecompressError {
<a href=#103 id=103 data-nosnippet>103</a> <span class="doccomment">/// Decompressor status on failure. See [TINFLStatus] for details.
<a href=#104 id=104 data-nosnippet>104</a> </span><span class="kw">pub </span>status: TINFLStatus,
<a href=#105 id=105 data-nosnippet>105</a> <span class="doccomment">/// The currently decompressed data if any.
<a href=#106 id=106 data-nosnippet>106</a> </span><span class="kw">pub </span>output: Vec&lt;u8&gt;,
<a href=#107 id=107 data-nosnippet>107</a>}
<a href=#108 id=108 data-nosnippet>108</a>
<a href=#109 id=109 data-nosnippet>109</a><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#110 id=110 data-nosnippet>110</a></span><span class="kw">impl </span>alloc::fmt::Display <span class="kw">for </span>DecompressError {
<a href=#111 id=111 data-nosnippet>111</a> <span class="attr">#[cold]
<a href=#112 id=112 data-nosnippet>112</a> </span><span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>::core::fmt::Formatter&lt;<span class="lifetime">'_</span>&gt;) -&gt; ::core::fmt::Result {
<a href=#113 id=113 data-nosnippet>113</a> f.write_str(<span class="kw">match </span><span class="self">self</span>.status {
<a href=#114 id=114 data-nosnippet>114</a> TINFLStatus::FailedCannotMakeProgress =&gt; <span class="string">"Truncated input stream"</span>,
<a href=#115 id=115 data-nosnippet>115</a> TINFLStatus::BadParam =&gt; <span class="string">"Invalid output buffer size"</span>,
<a href=#116 id=116 data-nosnippet>116</a> TINFLStatus::Adler32Mismatch =&gt; <span class="string">"Adler32 checksum mismatch"</span>,
<a href=#117 id=117 data-nosnippet>117</a> TINFLStatus::Failed =&gt; <span class="string">"Invalid input data"</span>,
<a href=#118 id=118 data-nosnippet>118</a> TINFLStatus::Done =&gt; <span class="string">""</span>, <span class="comment">// Unreachable
<a href=#119 id=119 data-nosnippet>119</a> </span>TINFLStatus::NeedsMoreInput =&gt; <span class="string">"Truncated input stream"</span>,
<a href=#120 id=120 data-nosnippet>120</a> TINFLStatus::HasMoreOutput =&gt; <span class="string">"Output size exceeded the specified limit"</span>,
<a href=#121 id=121 data-nosnippet>121</a> <span class="attr">#[cfg(feature = <span class="string">"block-boundary"</span>)]
<a href=#122 id=122 data-nosnippet>122</a> </span>TINFLStatus::BlockBoundary =&gt; <span class="string">"Reached end of a deflate block"</span>,
<a href=#123 id=123 data-nosnippet>123</a> })
<a href=#124 id=124 data-nosnippet>124</a> }
<a href=#125 id=125 data-nosnippet>125</a>}
<a href=#126 id=126 data-nosnippet>126</a>
<a href=#127 id=127 data-nosnippet>127</a><span class="doccomment">/// Implement Error trait only if std feature is requested as it requires std.
<a href=#128 id=128 data-nosnippet>128</a></span><span class="attr">#[cfg(all(feature = <span class="string">"std"</span>, feature = <span class="string">"with-alloc"</span>))]
<a href=#129 id=129 data-nosnippet>129</a></span><span class="kw">impl </span>Error <span class="kw">for </span>DecompressError {}
<a href=#130 id=130 data-nosnippet>130</a>
<a href=#131 id=131 data-nosnippet>131</a><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#132 id=132 data-nosnippet>132</a></span><span class="kw">fn </span>decompress_error(status: TINFLStatus, output: Vec&lt;u8&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;u8&gt;, DecompressError&gt; {
<a href=#133 id=133 data-nosnippet>133</a> <span class="prelude-val">Err</span>(DecompressError { status, output })
<a href=#134 id=134 data-nosnippet>134</a>}
<a href=#135 id=135 data-nosnippet>135</a>
<a href=#136 id=136 data-nosnippet>136</a><span class="doccomment">/// Decompress the deflate-encoded data in `input` to a vector.
<a href=#137 id=137 data-nosnippet>137</a>///
<a href=#138 id=138 data-nosnippet>138</a>/// NOTE: This function will not bound the output, so if the output is large enough it can result in an out of memory error.
<a href=#139 id=139 data-nosnippet>139</a>/// It is therefore suggested to not use this for anything other than test programs, use the functions with a specified limit, or
<a href=#140 id=140 data-nosnippet>140</a>/// ideally streaming decompression via the [flate2](https://github.com/alexcrichton/flate2-rs) library instead.
<a href=#141 id=141 data-nosnippet>141</a>///
<a href=#142 id=142 data-nosnippet>142</a>/// Returns a [`Result`] containing the [`Vec`] of decompressed data on success, and a [struct][DecompressError] containing the status and so far decompressed data if any on failure.
<a href=#143 id=143 data-nosnippet>143</a></span><span class="attr">#[inline]
<a href=#144 id=144 data-nosnippet>144</a>#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#145 id=145 data-nosnippet>145</a></span><span class="kw">pub fn </span>decompress_to_vec(input: <span class="kw-2">&amp;</span>[u8]) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;u8&gt;, DecompressError&gt; {
<a href=#146 id=146 data-nosnippet>146</a> decompress_to_vec_inner(input, <span class="number">0</span>, usize::MAX)
<a href=#147 id=147 data-nosnippet>147</a>}
<a href=#148 id=148 data-nosnippet>148</a>
<a href=#149 id=149 data-nosnippet>149</a><span class="doccomment">/// Decompress the deflate-encoded data (with a zlib wrapper) in `input` to a vector.
<a href=#150 id=150 data-nosnippet>150</a>///
<a href=#151 id=151 data-nosnippet>151</a>/// NOTE: This function will not bound the output, so if the output is large enough it can result in an out of memory error.
<a href=#152 id=152 data-nosnippet>152</a>/// It is therefore suggested to not use this for anything other than test programs, use the functions with a specified limit, or
<a href=#153 id=153 data-nosnippet>153</a>/// ideally streaming decompression via the [flate2](https://github.com/alexcrichton/flate2-rs) library instead.
<a href=#154 id=154 data-nosnippet>154</a>///
<a href=#155 id=155 data-nosnippet>155</a>/// Returns a [`Result`] containing the [`Vec`] of decompressed data on success, and a [struct][DecompressError] containing the status and so far decompressed data if any on failure.
<a href=#156 id=156 data-nosnippet>156</a></span><span class="attr">#[inline]
<a href=#157 id=157 data-nosnippet>157</a>#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#158 id=158 data-nosnippet>158</a></span><span class="kw">pub fn </span>decompress_to_vec_zlib(input: <span class="kw-2">&amp;</span>[u8]) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;u8&gt;, DecompressError&gt; {
<a href=#159 id=159 data-nosnippet>159</a> decompress_to_vec_inner(
<a href=#160 id=160 data-nosnippet>160</a> input,
<a href=#161 id=161 data-nosnippet>161</a> inflate_flags::TINFL_FLAG_PARSE_ZLIB_HEADER,
<a href=#162 id=162 data-nosnippet>162</a> usize::MAX,
<a href=#163 id=163 data-nosnippet>163</a> )
<a href=#164 id=164 data-nosnippet>164</a>}
<a href=#165 id=165 data-nosnippet>165</a>
<a href=#166 id=166 data-nosnippet>166</a><span class="doccomment">/// Decompress the deflate-encoded data in `input` to a vector.
<a href=#167 id=167 data-nosnippet>167</a>///
<a href=#168 id=168 data-nosnippet>168</a>/// The vector is grown to at most `max_size` bytes; if the data does not fit in that size,
<a href=#169 id=169 data-nosnippet>169</a>/// the error [struct][DecompressError] will contain the status [`TINFLStatus::HasMoreOutput`] and the data that was decompressed on failure.
<a href=#170 id=170 data-nosnippet>170</a>///
<a href=#171 id=171 data-nosnippet>171</a>/// As this function tries to decompress everything in one go, it's not ideal for general use outside of tests or where the output size is expected to be small.
<a href=#172 id=172 data-nosnippet>172</a>/// It is suggested to use streaming decompression via the [flate2](https://github.com/alexcrichton/flate2-rs) library instead.
<a href=#173 id=173 data-nosnippet>173</a>///
<a href=#174 id=174 data-nosnippet>174</a>/// Returns a [`Result`] containing the [`Vec`] of decompressed data on success, and a [struct][DecompressError] on failure.
<a href=#175 id=175 data-nosnippet>175</a></span><span class="attr">#[inline]
<a href=#176 id=176 data-nosnippet>176</a>#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#177 id=177 data-nosnippet>177</a></span><span class="kw">pub fn </span>decompress_to_vec_with_limit(
<a href=#178 id=178 data-nosnippet>178</a> input: <span class="kw-2">&amp;</span>[u8],
<a href=#179 id=179 data-nosnippet>179</a> max_size: usize,
<a href=#180 id=180 data-nosnippet>180</a>) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;u8&gt;, DecompressError&gt; {
<a href=#181 id=181 data-nosnippet>181</a> decompress_to_vec_inner(input, <span class="number">0</span>, max_size)
<a href=#182 id=182 data-nosnippet>182</a>}
<a href=#183 id=183 data-nosnippet>183</a>
<a href=#184 id=184 data-nosnippet>184</a><span class="doccomment">/// Decompress the deflate-encoded data (with a zlib wrapper) in `input` to a vector.
<a href=#185 id=185 data-nosnippet>185</a>/// The vector is grown to at most `max_size` bytes; if the data does not fit in that size,
<a href=#186 id=186 data-nosnippet>186</a>/// the error [struct][DecompressError] will contain the status [`TINFLStatus::HasMoreOutput`] and the data that was decompressed on failure.
<a href=#187 id=187 data-nosnippet>187</a>///
<a href=#188 id=188 data-nosnippet>188</a>/// As this function tries to decompress everything in one go, it's not ideal for general use outside of tests or where the output size is expected to be small.
<a href=#189 id=189 data-nosnippet>189</a>/// It is suggested to use streaming decompression via the [flate2](https://github.com/alexcrichton/flate2-rs) library instead.
<a href=#190 id=190 data-nosnippet>190</a>///
<a href=#191 id=191 data-nosnippet>191</a>/// Returns a [`Result`] containing the [`Vec`] of decompressed data on success, and a [struct][DecompressError] on failure.
<a href=#192 id=192 data-nosnippet>192</a></span><span class="attr">#[inline]
<a href=#193 id=193 data-nosnippet>193</a>#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#194 id=194 data-nosnippet>194</a></span><span class="kw">pub fn </span>decompress_to_vec_zlib_with_limit(
<a href=#195 id=195 data-nosnippet>195</a> input: <span class="kw-2">&amp;</span>[u8],
<a href=#196 id=196 data-nosnippet>196</a> max_size: usize,
<a href=#197 id=197 data-nosnippet>197</a>) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;u8&gt;, DecompressError&gt; {
<a href=#198 id=198 data-nosnippet>198</a> decompress_to_vec_inner(input, inflate_flags::TINFL_FLAG_PARSE_ZLIB_HEADER, max_size)
<a href=#199 id=199 data-nosnippet>199</a>}
<a href=#200 id=200 data-nosnippet>200</a>
<a href=#201 id=201 data-nosnippet>201</a><span class="doccomment">/// Backend of various to-[`Vec`] decompressions.
<a href=#202 id=202 data-nosnippet>202</a>///
<a href=#203 id=203 data-nosnippet>203</a>/// Returns [`Vec`] of decompressed data on success and the [error struct][DecompressError] with details on failure.
<a href=#204 id=204 data-nosnippet>204</a></span><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#205 id=205 data-nosnippet>205</a></span><span class="kw">fn </span>decompress_to_vec_inner(
<a href=#206 id=206 data-nosnippet>206</a> <span class="kw-2">mut </span>input: <span class="kw-2">&amp;</span>[u8],
<a href=#207 id=207 data-nosnippet>207</a> flags: u32,
<a href=#208 id=208 data-nosnippet>208</a> max_output_size: usize,
<a href=#209 id=209 data-nosnippet>209</a>) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;u8&gt;, DecompressError&gt; {
<a href=#210 id=210 data-nosnippet>210</a> <span class="kw">let </span>flags = flags | inflate_flags::TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF;
<a href=#211 id=211 data-nosnippet>211</a> <span class="kw">let </span><span class="kw-2">mut </span>ret: Vec&lt;u8&gt; = <span class="macro">vec!</span>[<span class="number">0</span>; input.len().saturating_mul(<span class="number">2</span>).min(max_output_size)];
<a href=#212 id=212 data-nosnippet>212</a>
<a href=#213 id=213 data-nosnippet>213</a> <span class="kw">let </span><span class="kw-2">mut </span>decomp = Box::&lt;DecompressorOxide&gt;::default();
<a href=#214 id=214 data-nosnippet>214</a>
<a href=#215 id=215 data-nosnippet>215</a> <span class="kw">let </span><span class="kw-2">mut </span>out_pos = <span class="number">0</span>;
<a href=#216 id=216 data-nosnippet>216</a> <span class="kw">loop </span>{
<a href=#217 id=217 data-nosnippet>217</a> <span class="comment">// Wrap the whole output slice so we know we have enough of the
<a href=#218 id=218 data-nosnippet>218</a> // decompressed data for matches.
<a href=#219 id=219 data-nosnippet>219</a> </span><span class="kw">let </span>(status, in_consumed, out_consumed) =
<a href=#220 id=220 data-nosnippet>220</a> decompress(<span class="kw-2">&amp;mut </span>decomp, input, <span class="kw-2">&amp;mut </span>ret, out_pos, flags);
<a href=#221 id=221 data-nosnippet>221</a> out_pos += out_consumed;
<a href=#222 id=222 data-nosnippet>222</a>
<a href=#223 id=223 data-nosnippet>223</a> <span class="kw">match </span>status {
<a href=#224 id=224 data-nosnippet>224</a> TINFLStatus::Done =&gt; {
<a href=#225 id=225 data-nosnippet>225</a> ret.truncate(out_pos);
<a href=#226 id=226 data-nosnippet>226</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(ret);
<a href=#227 id=227 data-nosnippet>227</a> }
<a href=#228 id=228 data-nosnippet>228</a>
<a href=#229 id=229 data-nosnippet>229</a> TINFLStatus::HasMoreOutput =&gt; {
<a href=#230 id=230 data-nosnippet>230</a> <span class="comment">// in_consumed is not expected to be out of bounds,
<a href=#231 id=231 data-nosnippet>231</a> // but the check eliminates a panicking code path
<a href=#232 id=232 data-nosnippet>232</a> </span><span class="kw">if </span>in_consumed &gt; input.len() {
<a href=#233 id=233 data-nosnippet>233</a> <span class="kw">return </span>decompress_error(TINFLStatus::HasMoreOutput, ret);
<a href=#234 id=234 data-nosnippet>234</a> }
<a href=#235 id=235 data-nosnippet>235</a> input = <span class="kw-2">&amp;</span>input[in_consumed..];
<a href=#236 id=236 data-nosnippet>236</a>
<a href=#237 id=237 data-nosnippet>237</a> <span class="comment">// if the buffer has already reached the size limit, return an error
<a href=#238 id=238 data-nosnippet>238</a> </span><span class="kw">if </span>ret.len() &gt;= max_output_size {
<a href=#239 id=239 data-nosnippet>239</a> <span class="kw">return </span>decompress_error(TINFLStatus::HasMoreOutput, ret);
<a href=#240 id=240 data-nosnippet>240</a> }
<a href=#241 id=241 data-nosnippet>241</a> <span class="comment">// calculate the new length, capped at `max_output_size`
<a href=#242 id=242 data-nosnippet>242</a> </span><span class="kw">let </span>new_len = ret.len().saturating_mul(<span class="number">2</span>).min(max_output_size);
<a href=#243 id=243 data-nosnippet>243</a> ret.resize(new_len, <span class="number">0</span>);
<a href=#244 id=244 data-nosnippet>244</a> }
<a href=#245 id=245 data-nosnippet>245</a>
<a href=#246 id=246 data-nosnippet>246</a> <span class="kw">_ </span>=&gt; <span class="kw">return </span>decompress_error(status, ret),
<a href=#247 id=247 data-nosnippet>247</a> }
<a href=#248 id=248 data-nosnippet>248</a> }
<a href=#249 id=249 data-nosnippet>249</a>}
<a href=#250 id=250 data-nosnippet>250</a>
<a href=#251 id=251 data-nosnippet>251</a><span class="doccomment">/// Decompress one or more source slices from an iterator into the output slice.
<a href=#252 id=252 data-nosnippet>252</a>///
<a href=#253 id=253 data-nosnippet>253</a>/// * On success, returns the number of bytes that were written.
<a href=#254 id=254 data-nosnippet>254</a>/// * On failure, returns the failure status code.
<a href=#255 id=255 data-nosnippet>255</a>///
<a href=#256 id=256 data-nosnippet>256</a>/// This will fail if the output buffer is not large enough, but in that case
<a href=#257 id=257 data-nosnippet>257</a>/// the output buffer will still contain the partial decompression.
<a href=#258 id=258 data-nosnippet>258</a>///
<a href=#259 id=259 data-nosnippet>259</a>/// * `out` the output buffer.
<a href=#260 id=260 data-nosnippet>260</a>/// * `it` the iterator of input slices.
<a href=#261 id=261 data-nosnippet>261</a>/// * `zlib_header` if the first slice out of the iterator is expected to have a
<a href=#262 id=262 data-nosnippet>262</a>/// Zlib header. Otherwise the slices are assumed to be the deflate data only.
<a href=#263 id=263 data-nosnippet>263</a>/// * `ignore_adler32` if the adler32 checksum should be calculated or not.
<a href=#264 id=264 data-nosnippet>264</a></span><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#265 id=265 data-nosnippet>265</a></span><span class="kw">pub fn </span>decompress_slice_iter_to_slice&lt;<span class="lifetime">'out</span>, <span class="lifetime">'inp</span>&gt;(
<a href=#266 id=266 data-nosnippet>266</a> out: <span class="kw-2">&amp;</span><span class="lifetime">'out </span><span class="kw-2">mut </span>[u8],
<a href=#267 id=267 data-nosnippet>267</a> it: <span class="kw">impl </span>Iterator&lt;Item = <span class="kw-2">&amp;</span><span class="lifetime">'inp </span>[u8]&gt;,
<a href=#268 id=268 data-nosnippet>268</a> zlib_header: bool,
<a href=#269 id=269 data-nosnippet>269</a> ignore_adler32: bool,
<a href=#270 id=270 data-nosnippet>270</a>) -&gt; <span class="prelude-ty">Result</span>&lt;usize, TINFLStatus&gt; {
<a href=#271 id=271 data-nosnippet>271</a> <span class="kw">use </span><span class="self">self</span>::core::inflate_flags::<span class="kw-2">*</span>;
<a href=#272 id=272 data-nosnippet>272</a>
<a href=#273 id=273 data-nosnippet>273</a> <span class="kw">let </span><span class="kw-2">mut </span>it = it.peekable();
<a href=#274 id=274 data-nosnippet>274</a> <span class="kw">let </span>r = <span class="kw-2">&amp;mut </span>DecompressorOxide::new();
<a href=#275 id=275 data-nosnippet>275</a> <span class="kw">let </span><span class="kw-2">mut </span>out_pos = <span class="number">0</span>;
<a href=#276 id=276 data-nosnippet>276</a> <span class="kw">while let </span><span class="prelude-val">Some</span>(in_buf) = it.next() {
<a href=#277 id=277 data-nosnippet>277</a> <span class="kw">let </span>has_more = it.peek().is_some();
<a href=#278 id=278 data-nosnippet>278</a> <span class="kw">let </span>flags = {
<a href=#279 id=279 data-nosnippet>279</a> <span class="kw">let </span><span class="kw-2">mut </span>f = TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF;
<a href=#280 id=280 data-nosnippet>280</a> <span class="kw">if </span>zlib_header {
<a href=#281 id=281 data-nosnippet>281</a> f |= TINFL_FLAG_PARSE_ZLIB_HEADER;
<a href=#282 id=282 data-nosnippet>282</a> }
<a href=#283 id=283 data-nosnippet>283</a> <span class="kw">if </span>ignore_adler32 {
<a href=#284 id=284 data-nosnippet>284</a> f |= TINFL_FLAG_IGNORE_ADLER32;
<a href=#285 id=285 data-nosnippet>285</a> }
<a href=#286 id=286 data-nosnippet>286</a> <span class="kw">if </span>has_more {
<a href=#287 id=287 data-nosnippet>287</a> f |= TINFL_FLAG_HAS_MORE_INPUT;
<a href=#288 id=288 data-nosnippet>288</a> }
<a href=#289 id=289 data-nosnippet>289</a> f
<a href=#290 id=290 data-nosnippet>290</a> };
<a href=#291 id=291 data-nosnippet>291</a> <span class="kw">let </span>(status, _input_read, bytes_written) = decompress(r, in_buf, out, out_pos, flags);
<a href=#292 id=292 data-nosnippet>292</a> out_pos += bytes_written;
<a href=#293 id=293 data-nosnippet>293</a> <span class="kw">match </span>status {
<a href=#294 id=294 data-nosnippet>294</a> TINFLStatus::NeedsMoreInput =&gt; <span class="kw">continue</span>,
<a href=#295 id=295 data-nosnippet>295</a> TINFLStatus::Done =&gt; <span class="kw">return </span><span class="prelude-val">Ok</span>(out_pos),
<a href=#296 id=296 data-nosnippet>296</a> e =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(e),
<a href=#297 id=297 data-nosnippet>297</a> }
<a href=#298 id=298 data-nosnippet>298</a> }
<a href=#299 id=299 data-nosnippet>299</a> <span class="comment">// If we ran out of source slices without getting a `Done` from the
<a href=#300 id=300 data-nosnippet>300</a> // decompression we can call it a failure.
<a href=#301 id=301 data-nosnippet>301</a> </span><span class="prelude-val">Err</span>(TINFLStatus::FailedCannotMakeProgress)
<a href=#302 id=302 data-nosnippet>302</a>}
<a href=#303 id=303 data-nosnippet>303</a>
<a href=#304 id=304 data-nosnippet>304</a><span class="attr">#[cfg(all(test, feature = <span class="string">"with-alloc"</span>))]
<a href=#305 id=305 data-nosnippet>305</a></span><span class="kw">mod </span>test {
<a href=#306 id=306 data-nosnippet>306</a> <span class="kw">use super</span>::{
<a href=#307 id=307 data-nosnippet>307</a> decompress_slice_iter_to_slice, decompress_to_vec_zlib, decompress_to_vec_zlib_with_limit,
<a href=#308 id=308 data-nosnippet>308</a> DecompressError, TINFLStatus,
<a href=#309 id=309 data-nosnippet>309</a> };
<a href=#310 id=310 data-nosnippet>310</a> <span class="kw">const </span>ENCODED: [u8; <span class="number">20</span>] = [
<a href=#311 id=311 data-nosnippet>311</a> <span class="number">120</span>, <span class="number">156</span>, <span class="number">243</span>, <span class="number">72</span>, <span class="number">205</span>, <span class="number">201</span>, <span class="number">201</span>, <span class="number">215</span>, <span class="number">81</span>, <span class="number">168</span>, <span class="number">202</span>, <span class="number">201</span>, <span class="number">76</span>, <span class="number">82</span>, <span class="number">4</span>, <span class="number">0</span>, <span class="number">27</span>, <span class="number">101</span>, <span class="number">4</span>, <span class="number">19</span>,
<a href=#312 id=312 data-nosnippet>312</a> ];
<a href=#313 id=313 data-nosnippet>313</a>
<a href=#314 id=314 data-nosnippet>314</a> <span class="attr">#[test]
<a href=#315 id=315 data-nosnippet>315</a> </span><span class="kw">fn </span>decompress_vec() {
<a href=#316 id=316 data-nosnippet>316</a> <span class="kw">let </span>res = decompress_to_vec_zlib(<span class="kw-2">&amp;</span>ENCODED[..]).unwrap();
<a href=#317 id=317 data-nosnippet>317</a> <span class="macro">assert_eq!</span>(res.as_slice(), <span class="kw-2">&amp;</span><span class="string">b"Hello, zlib!"</span>[..]);
<a href=#318 id=318 data-nosnippet>318</a> }
<a href=#319 id=319 data-nosnippet>319</a>
<a href=#320 id=320 data-nosnippet>320</a> <span class="attr">#[test]
<a href=#321 id=321 data-nosnippet>321</a> </span><span class="kw">fn </span>decompress_vec_with_high_limit() {
<a href=#322 id=322 data-nosnippet>322</a> <span class="kw">let </span>res = decompress_to_vec_zlib_with_limit(<span class="kw-2">&amp;</span>ENCODED[..], <span class="number">100_000</span>).unwrap();
<a href=#323 id=323 data-nosnippet>323</a> <span class="macro">assert_eq!</span>(res.as_slice(), <span class="kw-2">&amp;</span><span class="string">b"Hello, zlib!"</span>[..]);
<a href=#324 id=324 data-nosnippet>324</a> }
<a href=#325 id=325 data-nosnippet>325</a>
<a href=#326 id=326 data-nosnippet>326</a> <span class="attr">#[test]
<a href=#327 id=327 data-nosnippet>327</a> </span><span class="kw">fn </span>fail_to_decompress_with_limit() {
<a href=#328 id=328 data-nosnippet>328</a> <span class="kw">let </span>res = decompress_to_vec_zlib_with_limit(<span class="kw-2">&amp;</span>ENCODED[..], <span class="number">8</span>);
<a href=#329 id=329 data-nosnippet>329</a> <span class="kw">match </span>res {
<a href=#330 id=330 data-nosnippet>330</a> <span class="prelude-val">Err</span>(DecompressError {
<a href=#331 id=331 data-nosnippet>331</a> status: TINFLStatus::HasMoreOutput,
<a href=#332 id=332 data-nosnippet>332</a> ..
<a href=#333 id=333 data-nosnippet>333</a> }) =&gt; (), <span class="comment">// expected result
<a href=#334 id=334 data-nosnippet>334</a> </span><span class="kw">_ </span>=&gt; <span class="macro">panic!</span>(<span class="string">"Decompression output size limit was not enforced"</span>),
<a href=#335 id=335 data-nosnippet>335</a> }
<a href=#336 id=336 data-nosnippet>336</a> }
<a href=#337 id=337 data-nosnippet>337</a>
<a href=#338 id=338 data-nosnippet>338</a> <span class="attr">#[test]
<a href=#339 id=339 data-nosnippet>339</a> </span><span class="kw">fn </span>test_decompress_slice_iter_to_slice() {
<a href=#340 id=340 data-nosnippet>340</a> <span class="comment">// one slice
<a href=#341 id=341 data-nosnippet>341</a> </span><span class="kw">let </span><span class="kw-2">mut </span>out = [<span class="number">0_u8</span>; <span class="number">12_usize</span>];
<a href=#342 id=342 data-nosnippet>342</a> <span class="kw">let </span>r =
<a href=#343 id=343 data-nosnippet>343</a> decompress_slice_iter_to_slice(<span class="kw-2">&amp;mut </span>out, <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>ENCODED[..]).into_iter(), <span class="bool-val">true</span>, <span class="bool-val">false</span>);
<a href=#344 id=344 data-nosnippet>344</a> <span class="macro">assert_eq!</span>(r, <span class="prelude-val">Ok</span>(<span class="number">12</span>));
<a href=#345 id=345 data-nosnippet>345</a> <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>out[..<span class="number">12</span>], <span class="kw-2">&amp;</span><span class="string">b"Hello, zlib!"</span>[..]);
<a href=#346 id=346 data-nosnippet>346</a>
<a href=#347 id=347 data-nosnippet>347</a> <span class="comment">// some chunks at a time
<a href=#348 id=348 data-nosnippet>348</a> </span><span class="kw">for </span>chunk_size <span class="kw">in </span><span class="number">1</span>..<span class="number">13 </span>{
<a href=#349 id=349 data-nosnippet>349</a> <span class="comment">// Note: because of https://github.com/Frommi/miniz_oxide/issues/110 our
<a href=#350 id=350 data-nosnippet>350</a> // out buffer needs to have +1 byte available when the chunk size cuts
<a href=#351 id=351 data-nosnippet>351</a> // the adler32 data off from the last actual data.
<a href=#352 id=352 data-nosnippet>352</a> </span><span class="kw">let </span><span class="kw-2">mut </span>out = [<span class="number">0_u8</span>; <span class="number">12_usize </span>+ <span class="number">1</span>];
<a href=#353 id=353 data-nosnippet>353</a> <span class="kw">let </span>r =
<a href=#354 id=354 data-nosnippet>354</a> decompress_slice_iter_to_slice(<span class="kw-2">&amp;mut </span>out, ENCODED.chunks(chunk_size), <span class="bool-val">true</span>, <span class="bool-val">false</span>);
<a href=#355 id=355 data-nosnippet>355</a> <span class="macro">assert_eq!</span>(r, <span class="prelude-val">Ok</span>(<span class="number">12</span>));
<a href=#356 id=356 data-nosnippet>356</a> <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>out[..<span class="number">12</span>], <span class="kw-2">&amp;</span><span class="string">b"Hello, zlib!"</span>[..]);
<a href=#357 id=357 data-nosnippet>357</a> }
<a href=#358 id=358 data-nosnippet>358</a>
<a href=#359 id=359 data-nosnippet>359</a> <span class="comment">// output buffer too small
<a href=#360 id=360 data-nosnippet>360</a> </span><span class="kw">let </span><span class="kw-2">mut </span>out = [<span class="number">0_u8</span>; <span class="number">3_usize</span>];
<a href=#361 id=361 data-nosnippet>361</a> <span class="kw">let </span>r = decompress_slice_iter_to_slice(<span class="kw-2">&amp;mut </span>out, ENCODED.chunks(<span class="number">7</span>), <span class="bool-val">true</span>, <span class="bool-val">false</span>);
<a href=#362 id=362 data-nosnippet>362</a> <span class="macro">assert!</span>(r.is_err());
<a href=#363 id=363 data-nosnippet>363</a> }
<a href=#364 id=364 data-nosnippet>364</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/inflate/output_buffer.rs`."><title>output_buffer.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/inflate/</div>output_buffer.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">/// A wrapper for the output slice used when decompressing.
<a href=#2 id=2 data-nosnippet>2</a>///
<a href=#3 id=3 data-nosnippet>3</a>/// Using this rather than `Cursor` lets us implement the writing methods directly on
<a href=#4 id=4 data-nosnippet>4</a>/// the buffer and lets us use a usize rather than u64 for the position which helps with
<a href=#5 id=5 data-nosnippet>5</a>/// performance on 32-bit systems.
<a href=#6 id=6 data-nosnippet>6</a></span><span class="kw">pub struct </span>OutputBuffer&lt;<span class="lifetime">'a</span>&gt; {
<a href=#7 id=7 data-nosnippet>7</a> slice: <span class="kw-2">&amp;</span><span class="lifetime">'a </span><span class="kw-2">mut </span>[u8],
<a href=#8 id=8 data-nosnippet>8</a> position: usize,
<a href=#9 id=9 data-nosnippet>9</a>}
<a href=#10 id=10 data-nosnippet>10</a>
<a href=#11 id=11 data-nosnippet>11</a><span class="kw">impl</span>&lt;<span class="lifetime">'a</span>&gt; OutputBuffer&lt;<span class="lifetime">'a</span>&gt; {
<a href=#12 id=12 data-nosnippet>12</a> <span class="attr">#[inline]
<a href=#13 id=13 data-nosnippet>13</a> </span><span class="kw">pub fn </span>from_slice_and_pos(slice: <span class="kw-2">&amp;</span><span class="lifetime">'a </span><span class="kw-2">mut </span>[u8], position: usize) -&gt; OutputBuffer&lt;<span class="lifetime">'a</span>&gt; {
<a href=#14 id=14 data-nosnippet>14</a> OutputBuffer { slice, position }
<a href=#15 id=15 data-nosnippet>15</a> }
<a href=#16 id=16 data-nosnippet>16</a>
<a href=#17 id=17 data-nosnippet>17</a> <span class="attr">#[inline(always)]
<a href=#18 id=18 data-nosnippet>18</a> </span><span class="kw">pub const fn </span>position(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; usize {
<a href=#19 id=19 data-nosnippet>19</a> <span class="self">self</span>.position
<a href=#20 id=20 data-nosnippet>20</a> }
<a href=#21 id=21 data-nosnippet>21</a>
<a href=#22 id=22 data-nosnippet>22</a> <span class="attr">#[inline(always)]
<a href=#23 id=23 data-nosnippet>23</a> </span><span class="kw">pub fn </span>set_position(<span class="kw-2">&amp;mut </span><span class="self">self</span>, position: usize) {
<a href=#24 id=24 data-nosnippet>24</a> <span class="self">self</span>.position = position;
<a href=#25 id=25 data-nosnippet>25</a> }
<a href=#26 id=26 data-nosnippet>26</a>
<a href=#27 id=27 data-nosnippet>27</a> <span class="doccomment">/// Write a byte to the current position and increment
<a href=#28 id=28 data-nosnippet>28</a> ///
<a href=#29 id=29 data-nosnippet>29</a> /// Assumes that there is space.
<a href=#30 id=30 data-nosnippet>30</a> </span><span class="attr">#[inline]
<a href=#31 id=31 data-nosnippet>31</a> </span><span class="kw">pub fn </span>write_byte(<span class="kw-2">&amp;mut </span><span class="self">self</span>, byte: u8) {
<a href=#32 id=32 data-nosnippet>32</a> <span class="self">self</span>.slice[<span class="self">self</span>.position] = byte;
<a href=#33 id=33 data-nosnippet>33</a> <span class="self">self</span>.position += <span class="number">1</span>;
<a href=#34 id=34 data-nosnippet>34</a> }
<a href=#35 id=35 data-nosnippet>35</a>
<a href=#36 id=36 data-nosnippet>36</a> <span class="doccomment">/// Write a slice to the current position and increment
<a href=#37 id=37 data-nosnippet>37</a> ///
<a href=#38 id=38 data-nosnippet>38</a> /// Assumes that there is space.
<a href=#39 id=39 data-nosnippet>39</a> </span><span class="attr">#[inline]
<a href=#40 id=40 data-nosnippet>40</a> </span><span class="kw">pub fn </span>write_slice(<span class="kw-2">&amp;mut </span><span class="self">self</span>, data: <span class="kw-2">&amp;</span>[u8]) {
<a href=#41 id=41 data-nosnippet>41</a> <span class="kw">let </span>len = data.len();
<a href=#42 id=42 data-nosnippet>42</a> <span class="self">self</span>.slice[<span class="self">self</span>.position..<span class="self">self</span>.position + len].copy_from_slice(data);
<a href=#43 id=43 data-nosnippet>43</a> <span class="self">self</span>.position += data.len();
<a href=#44 id=44 data-nosnippet>44</a> }
<a href=#45 id=45 data-nosnippet>45</a>
<a href=#46 id=46 data-nosnippet>46</a> <span class="attr">#[inline]
<a href=#47 id=47 data-nosnippet>47</a> </span><span class="kw">pub const fn </span>bytes_left(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; usize {
<a href=#48 id=48 data-nosnippet>48</a> <span class="self">self</span>.slice.len() - <span class="self">self</span>.position
<a href=#49 id=49 data-nosnippet>49</a> }
<a href=#50 id=50 data-nosnippet>50</a>
<a href=#51 id=51 data-nosnippet>51</a> <span class="attr">#[inline(always)]
<a href=#52 id=52 data-nosnippet>52</a> </span><span class="kw">pub const fn </span>get_ref(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span>[u8] {
<a href=#53 id=53 data-nosnippet>53</a> <span class="self">self</span>.slice
<a href=#54 id=54 data-nosnippet>54</a> }
<a href=#55 id=55 data-nosnippet>55</a>
<a href=#56 id=56 data-nosnippet>56</a> <span class="attr">#[inline(always)]
<a href=#57 id=57 data-nosnippet>57</a> </span><span class="kw">pub fn </span>get_mut(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;mut </span>[u8] {
<a href=#58 id=58 data-nosnippet>58</a> <span class="self">self</span>.slice
<a href=#59 id=59 data-nosnippet>59</a> }
<a href=#60 id=60 data-nosnippet>60</a>}
<a href=#61 id=61 data-nosnippet>61</a>
<a href=#62 id=62 data-nosnippet>62</a><span class="doccomment">/// A wrapper for the output slice used when decompressing.
<a href=#63 id=63 data-nosnippet>63</a>///
<a href=#64 id=64 data-nosnippet>64</a>/// Using this rather than `Cursor` lets us implement the writing methods directly on
<a href=#65 id=65 data-nosnippet>65</a>/// the buffer and lets us use a usize rather than u64 for the position which helps with
<a href=#66 id=66 data-nosnippet>66</a>/// performance on 32-bit systems.
<a href=#67 id=67 data-nosnippet>67</a></span><span class="attr">#[derive(Copy, Clone)]
<a href=#68 id=68 data-nosnippet>68</a></span><span class="kw">pub struct </span>InputWrapper&lt;<span class="lifetime">'a</span>&gt; {
<a href=#69 id=69 data-nosnippet>69</a> slice: <span class="kw-2">&amp;</span><span class="lifetime">'a </span>[u8],
<a href=#70 id=70 data-nosnippet>70</a>}
<a href=#71 id=71 data-nosnippet>71</a>
<a href=#72 id=72 data-nosnippet>72</a><span class="kw">impl</span>&lt;<span class="lifetime">'a</span>&gt; InputWrapper&lt;<span class="lifetime">'a</span>&gt; {
<a href=#73 id=73 data-nosnippet>73</a> <span class="attr">#[inline(always)]
<a href=#74 id=74 data-nosnippet>74</a> </span><span class="kw">pub const fn </span>as_slice(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span>[u8] {
<a href=#75 id=75 data-nosnippet>75</a> <span class="self">self</span>.slice
<a href=#76 id=76 data-nosnippet>76</a> }
<a href=#77 id=77 data-nosnippet>77</a>
<a href=#78 id=78 data-nosnippet>78</a> <span class="attr">#[inline(always)]
<a href=#79 id=79 data-nosnippet>79</a> </span><span class="kw">pub const fn </span>from_slice(slice: <span class="kw-2">&amp;</span><span class="lifetime">'a </span>[u8]) -&gt; InputWrapper&lt;<span class="lifetime">'a</span>&gt; {
<a href=#80 id=80 data-nosnippet>80</a> InputWrapper { slice }
<a href=#81 id=81 data-nosnippet>81</a> }
<a href=#82 id=82 data-nosnippet>82</a>
<a href=#83 id=83 data-nosnippet>83</a> <span class="attr">#[inline(always)]
<a href=#84 id=84 data-nosnippet>84</a> </span><span class="kw">pub fn </span>advance(<span class="kw-2">&amp;mut </span><span class="self">self</span>, steps: usize) {
<a href=#85 id=85 data-nosnippet>85</a> <span class="self">self</span>.slice = <span class="kw-2">&amp;</span><span class="self">self</span>.slice[steps..];
<a href=#86 id=86 data-nosnippet>86</a> }
<a href=#87 id=87 data-nosnippet>87</a>
<a href=#88 id=88 data-nosnippet>88</a> <span class="attr">#[inline]
<a href=#89 id=89 data-nosnippet>89</a> </span><span class="kw">pub fn </span>read_byte(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;u8&gt; {
<a href=#90 id=90 data-nosnippet>90</a> <span class="self">self</span>.slice.first().map(|n| {
<a href=#91 id=91 data-nosnippet>91</a> <span class="self">self</span>.advance(<span class="number">1</span>);
<a href=#92 id=92 data-nosnippet>92</a> <span class="kw-2">*</span>n
<a href=#93 id=93 data-nosnippet>93</a> })
<a href=#94 id=94 data-nosnippet>94</a> }
<a href=#95 id=95 data-nosnippet>95</a>
<a href=#96 id=96 data-nosnippet>96</a> <span class="attr">#[inline]
<a href=#97 id=97 data-nosnippet>97</a> #[cfg(target_pointer_width = <span class="string">"64"</span>)]
<a href=#98 id=98 data-nosnippet>98</a> </span><span class="kw">pub fn </span>read_u32_le(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; u32 {
<a href=#99 id=99 data-nosnippet>99</a> <span class="kw">let </span>ret = {
<a href=#100 id=100 data-nosnippet>100</a> <span class="kw">let </span>four_bytes: [u8; <span class="number">4</span>] = <span class="self">self</span>.slice[..<span class="number">4</span>].try_into().unwrap_or_default();
<a href=#101 id=101 data-nosnippet>101</a> u32::from_le_bytes(four_bytes)
<a href=#102 id=102 data-nosnippet>102</a> };
<a href=#103 id=103 data-nosnippet>103</a> <span class="self">self</span>.advance(<span class="number">4</span>);
<a href=#104 id=104 data-nosnippet>104</a> ret
<a href=#105 id=105 data-nosnippet>105</a> }
<a href=#106 id=106 data-nosnippet>106</a>
<a href=#107 id=107 data-nosnippet>107</a> <span class="attr">#[inline(always)]
<a href=#108 id=108 data-nosnippet>108</a> </span><span class="kw">pub const fn </span>bytes_left(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; usize {
<a href=#109 id=109 data-nosnippet>109</a> <span class="self">self</span>.slice.len()
<a href=#110 id=110 data-nosnippet>110</a> }
<a href=#111 id=111 data-nosnippet>111</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/inflate/stream.rs`."><title>stream.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../../static.files/storage-e2aeef58.js"></script><script defer src="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/inflate/</div>stream.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! Extra streaming decompression functionality.
<a href=#2 id=2 data-nosnippet>2</a>//!
<a href=#3 id=3 data-nosnippet>3</a>//! As of now this is mainly intended for use to build a higher-level wrapper.
<a href=#4 id=4 data-nosnippet>4</a></span><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#5 id=5 data-nosnippet>5</a></span><span class="kw">use </span><span class="kw">crate</span>::alloc::boxed::Box;
<a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>core::{cmp, mem};
<a href=#7 id=7 data-nosnippet>7</a>
<a href=#8 id=8 data-nosnippet>8</a><span class="kw">use </span><span class="kw">crate</span>::inflate::core::{decompress, inflate_flags, DecompressorOxide, TINFL_LZ_DICT_SIZE};
<a href=#9 id=9 data-nosnippet>9</a><span class="kw">use </span><span class="kw">crate</span>::inflate::TINFLStatus;
<a href=#10 id=10 data-nosnippet>10</a><span class="kw">use crate</span>::{DataFormat, MZError, MZFlush, MZResult, MZStatus, StreamResult};
<a href=#11 id=11 data-nosnippet>11</a>
<a href=#12 id=12 data-nosnippet>12</a><span class="doccomment">/// Tag that determines reset policy of [InflateState](struct.InflateState.html)
<a href=#13 id=13 data-nosnippet>13</a></span><span class="kw">pub trait </span>ResetPolicy {
<a href=#14 id=14 data-nosnippet>14</a> <span class="doccomment">/// Performs reset
<a href=#15 id=15 data-nosnippet>15</a> </span><span class="kw">fn </span>reset(<span class="kw-2">&amp;</span><span class="self">self</span>, state: <span class="kw-2">&amp;mut </span>InflateState);
<a href=#16 id=16 data-nosnippet>16</a>}
<a href=#17 id=17 data-nosnippet>17</a>
<a href=#18 id=18 data-nosnippet>18</a><span class="doccomment">/// Resets state, without performing expensive ops (e.g. zeroing buffer)
<a href=#19 id=19 data-nosnippet>19</a>///
<a href=#20 id=20 data-nosnippet>20</a>/// Note that not zeroing buffer can lead to security issues when dealing with untrusted input.
<a href=#21 id=21 data-nosnippet>21</a></span><span class="kw">pub struct </span>MinReset;
<a href=#22 id=22 data-nosnippet>22</a>
<a href=#23 id=23 data-nosnippet>23</a><span class="kw">impl </span>ResetPolicy <span class="kw">for </span>MinReset {
<a href=#24 id=24 data-nosnippet>24</a> <span class="kw">fn </span>reset(<span class="kw-2">&amp;</span><span class="self">self</span>, state: <span class="kw-2">&amp;mut </span>InflateState) {
<a href=#25 id=25 data-nosnippet>25</a> state.decompressor().init();
<a href=#26 id=26 data-nosnippet>26</a> state.dict_ofs = <span class="number">0</span>;
<a href=#27 id=27 data-nosnippet>27</a> state.dict_avail = <span class="number">0</span>;
<a href=#28 id=28 data-nosnippet>28</a> state.first_call = <span class="bool-val">true</span>;
<a href=#29 id=29 data-nosnippet>29</a> state.has_flushed = <span class="bool-val">false</span>;
<a href=#30 id=30 data-nosnippet>30</a> state.last_status = TINFLStatus::NeedsMoreInput;
<a href=#31 id=31 data-nosnippet>31</a> }
<a href=#32 id=32 data-nosnippet>32</a>}
<a href=#33 id=33 data-nosnippet>33</a>
<a href=#34 id=34 data-nosnippet>34</a><span class="doccomment">/// Resets state and zero memory, continuing to use the same data format.
<a href=#35 id=35 data-nosnippet>35</a></span><span class="kw">pub struct </span>ZeroReset;
<a href=#36 id=36 data-nosnippet>36</a>
<a href=#37 id=37 data-nosnippet>37</a><span class="kw">impl </span>ResetPolicy <span class="kw">for </span>ZeroReset {
<a href=#38 id=38 data-nosnippet>38</a> <span class="attr">#[inline]
<a href=#39 id=39 data-nosnippet>39</a> </span><span class="kw">fn </span>reset(<span class="kw-2">&amp;</span><span class="self">self</span>, state: <span class="kw-2">&amp;mut </span>InflateState) {
<a href=#40 id=40 data-nosnippet>40</a> MinReset.reset(state);
<a href=#41 id=41 data-nosnippet>41</a> state.dict = [<span class="number">0</span>; TINFL_LZ_DICT_SIZE];
<a href=#42 id=42 data-nosnippet>42</a> }
<a href=#43 id=43 data-nosnippet>43</a>}
<a href=#44 id=44 data-nosnippet>44</a>
<a href=#45 id=45 data-nosnippet>45</a><span class="doccomment">/// Full reset of the state, including zeroing memory.
<a href=#46 id=46 data-nosnippet>46</a>///
<a href=#47 id=47 data-nosnippet>47</a>/// Requires to provide new data format.
<a href=#48 id=48 data-nosnippet>48</a></span><span class="kw">pub struct </span>FullReset(<span class="kw">pub </span>DataFormat);
<a href=#49 id=49 data-nosnippet>49</a>
<a href=#50 id=50 data-nosnippet>50</a><span class="kw">impl </span>ResetPolicy <span class="kw">for </span>FullReset {
<a href=#51 id=51 data-nosnippet>51</a> <span class="attr">#[inline]
<a href=#52 id=52 data-nosnippet>52</a> </span><span class="kw">fn </span>reset(<span class="kw-2">&amp;</span><span class="self">self</span>, state: <span class="kw-2">&amp;mut </span>InflateState) {
<a href=#53 id=53 data-nosnippet>53</a> ZeroReset.reset(state);
<a href=#54 id=54 data-nosnippet>54</a> state.data_format = <span class="self">self</span>.<span class="number">0</span>;
<a href=#55 id=55 data-nosnippet>55</a> }
<a href=#56 id=56 data-nosnippet>56</a>}
<a href=#57 id=57 data-nosnippet>57</a>
<a href=#58 id=58 data-nosnippet>58</a><span class="doccomment">/// A struct that compbines a decompressor with extra data for streaming decompression.
<a href=#59 id=59 data-nosnippet>59</a>///
<a href=#60 id=60 data-nosnippet>60</a></span><span class="attr">#[derive(Clone)]
<a href=#61 id=61 data-nosnippet>61</a></span><span class="kw">pub struct </span>InflateState {
<a href=#62 id=62 data-nosnippet>62</a> <span class="doccomment">/// Inner decompressor struct
<a href=#63 id=63 data-nosnippet>63</a> </span>decomp: DecompressorOxide,
<a href=#64 id=64 data-nosnippet>64</a>
<a href=#65 id=65 data-nosnippet>65</a> <span class="doccomment">/// Buffer of input bytes for matches.
<a href=#66 id=66 data-nosnippet>66</a> /// TODO: Could probably do this a bit cleaner with some
<a href=#67 id=67 data-nosnippet>67</a> /// Cursor-like class.
<a href=#68 id=68 data-nosnippet>68</a> /// We may also look into whether we need to keep a buffer here, or just one in the
<a href=#69 id=69 data-nosnippet>69</a> /// decompressor struct.
<a href=#70 id=70 data-nosnippet>70</a> </span>dict: [u8; TINFL_LZ_DICT_SIZE],
<a href=#71 id=71 data-nosnippet>71</a> <span class="doccomment">/// Where in the buffer are we currently at?
<a href=#72 id=72 data-nosnippet>72</a> </span>dict_ofs: usize,
<a href=#73 id=73 data-nosnippet>73</a> <span class="doccomment">/// How many bytes of data to be flushed is there currently in the buffer?
<a href=#74 id=74 data-nosnippet>74</a> </span>dict_avail: usize,
<a href=#75 id=75 data-nosnippet>75</a>
<a href=#76 id=76 data-nosnippet>76</a> first_call: bool,
<a href=#77 id=77 data-nosnippet>77</a> has_flushed: bool,
<a href=#78 id=78 data-nosnippet>78</a>
<a href=#79 id=79 data-nosnippet>79</a> <span class="doccomment">/// Whether the input data is wrapped in a zlib header and checksum.
<a href=#80 id=80 data-nosnippet>80</a> /// TODO: This should be stored in the decompressor.
<a href=#81 id=81 data-nosnippet>81</a> </span>data_format: DataFormat,
<a href=#82 id=82 data-nosnippet>82</a> last_status: TINFLStatus,
<a href=#83 id=83 data-nosnippet>83</a>}
<a href=#84 id=84 data-nosnippet>84</a>
<a href=#85 id=85 data-nosnippet>85</a><span class="kw">impl </span>Default <span class="kw">for </span>InflateState {
<a href=#86 id=86 data-nosnippet>86</a> <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
<a href=#87 id=87 data-nosnippet>87</a> InflateState {
<a href=#88 id=88 data-nosnippet>88</a> decomp: DecompressorOxide::default(),
<a href=#89 id=89 data-nosnippet>89</a> dict: [<span class="number">0</span>; TINFL_LZ_DICT_SIZE],
<a href=#90 id=90 data-nosnippet>90</a> dict_ofs: <span class="number">0</span>,
<a href=#91 id=91 data-nosnippet>91</a> dict_avail: <span class="number">0</span>,
<a href=#92 id=92 data-nosnippet>92</a> first_call: <span class="bool-val">true</span>,
<a href=#93 id=93 data-nosnippet>93</a> has_flushed: <span class="bool-val">false</span>,
<a href=#94 id=94 data-nosnippet>94</a> data_format: DataFormat::Raw,
<a href=#95 id=95 data-nosnippet>95</a> last_status: TINFLStatus::NeedsMoreInput,
<a href=#96 id=96 data-nosnippet>96</a> }
<a href=#97 id=97 data-nosnippet>97</a> }
<a href=#98 id=98 data-nosnippet>98</a>}
<a href=#99 id=99 data-nosnippet>99</a><span class="kw">impl </span>InflateState {
<a href=#100 id=100 data-nosnippet>100</a> <span class="doccomment">/// Create a new state.
<a href=#101 id=101 data-nosnippet>101</a> ///
<a href=#102 id=102 data-nosnippet>102</a> /// Note that this struct is quite large due to internal buffers, and as such storing it on
<a href=#103 id=103 data-nosnippet>103</a> /// the stack is not recommended.
<a href=#104 id=104 data-nosnippet>104</a> ///
<a href=#105 id=105 data-nosnippet>105</a> /// # Parameters
<a href=#106 id=106 data-nosnippet>106</a> /// `data_format`: Determines whether the compressed data is assumed to wrapped with zlib
<a href=#107 id=107 data-nosnippet>107</a> /// metadata.
<a href=#108 id=108 data-nosnippet>108</a> </span><span class="kw">pub fn </span>new(data_format: DataFormat) -&gt; InflateState {
<a href=#109 id=109 data-nosnippet>109</a> InflateState {
<a href=#110 id=110 data-nosnippet>110</a> data_format,
<a href=#111 id=111 data-nosnippet>111</a> ..Default::default()
<a href=#112 id=112 data-nosnippet>112</a> }
<a href=#113 id=113 data-nosnippet>113</a> }
<a href=#114 id=114 data-nosnippet>114</a>
<a href=#115 id=115 data-nosnippet>115</a> <span class="doccomment">/// Create a new state on the heap.
<a href=#116 id=116 data-nosnippet>116</a> ///
<a href=#117 id=117 data-nosnippet>117</a> /// # Parameters
<a href=#118 id=118 data-nosnippet>118</a> /// `data_format`: Determines whether the compressed data is assumed to wrapped with zlib
<a href=#119 id=119 data-nosnippet>119</a> /// metadata.
<a href=#120 id=120 data-nosnippet>120</a> </span><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#121 id=121 data-nosnippet>121</a> </span><span class="kw">pub fn </span>new_boxed(data_format: DataFormat) -&gt; Box&lt;InflateState&gt; {
<a href=#122 id=122 data-nosnippet>122</a> <span class="kw">let </span><span class="kw-2">mut </span>b: Box&lt;InflateState&gt; = Box::default();
<a href=#123 id=123 data-nosnippet>123</a> b.data_format = data_format;
<a href=#124 id=124 data-nosnippet>124</a> b
<a href=#125 id=125 data-nosnippet>125</a> }
<a href=#126 id=126 data-nosnippet>126</a>
<a href=#127 id=127 data-nosnippet>127</a> <span class="doccomment">/// Access the innner decompressor.
<a href=#128 id=128 data-nosnippet>128</a> </span><span class="kw">pub fn </span>decompressor(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;mut </span>DecompressorOxide {
<a href=#129 id=129 data-nosnippet>129</a> <span class="kw-2">&amp;mut </span><span class="self">self</span>.decomp
<a href=#130 id=130 data-nosnippet>130</a> }
<a href=#131 id=131 data-nosnippet>131</a>
<a href=#132 id=132 data-nosnippet>132</a> <span class="doccomment">/// Return the status of the last call to `inflate` with this `InflateState`.
<a href=#133 id=133 data-nosnippet>133</a> </span><span class="kw">pub const fn </span>last_status(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; TINFLStatus {
<a href=#134 id=134 data-nosnippet>134</a> <span class="self">self</span>.last_status
<a href=#135 id=135 data-nosnippet>135</a> }
<a href=#136 id=136 data-nosnippet>136</a>
<a href=#137 id=137 data-nosnippet>137</a> <span class="doccomment">/// Create a new state using miniz/zlib style window bits parameter.
<a href=#138 id=138 data-nosnippet>138</a> ///
<a href=#139 id=139 data-nosnippet>139</a> /// The decompressor does not support different window sizes. As such,
<a href=#140 id=140 data-nosnippet>140</a> /// any positive (&gt;0) value will set the zlib header flag, while a negative one
<a href=#141 id=141 data-nosnippet>141</a> /// will not.
<a href=#142 id=142 data-nosnippet>142</a> </span><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#143 id=143 data-nosnippet>143</a> </span><span class="kw">pub fn </span>new_boxed_with_window_bits(window_bits: i32) -&gt; Box&lt;InflateState&gt; {
<a href=#144 id=144 data-nosnippet>144</a> <span class="kw">let </span><span class="kw-2">mut </span>b: Box&lt;InflateState&gt; = Box::default();
<a href=#145 id=145 data-nosnippet>145</a> b.data_format = DataFormat::from_window_bits(window_bits);
<a href=#146 id=146 data-nosnippet>146</a> b
<a href=#147 id=147 data-nosnippet>147</a> }
<a href=#148 id=148 data-nosnippet>148</a>
<a href=#149 id=149 data-nosnippet>149</a> <span class="attr">#[inline]
<a href=#150 id=150 data-nosnippet>150</a> </span><span class="doccomment">/// Reset the decompressor without re-allocating memory, using the given
<a href=#151 id=151 data-nosnippet>151</a> /// data format.
<a href=#152 id=152 data-nosnippet>152</a> </span><span class="kw">pub fn </span>reset(<span class="kw-2">&amp;mut </span><span class="self">self</span>, data_format: DataFormat) {
<a href=#153 id=153 data-nosnippet>153</a> <span class="self">self</span>.reset_as(FullReset(data_format));
<a href=#154 id=154 data-nosnippet>154</a> }
<a href=#155 id=155 data-nosnippet>155</a>
<a href=#156 id=156 data-nosnippet>156</a> <span class="attr">#[inline]
<a href=#157 id=157 data-nosnippet>157</a> </span><span class="doccomment">/// Resets the state according to specified policy.
<a href=#158 id=158 data-nosnippet>158</a> </span><span class="kw">pub fn </span>reset_as&lt;T: ResetPolicy&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, policy: T) {
<a href=#159 id=159 data-nosnippet>159</a> policy.reset(<span class="self">self</span>)
<a href=#160 id=160 data-nosnippet>160</a> }
<a href=#161 id=161 data-nosnippet>161</a>}
<a href=#162 id=162 data-nosnippet>162</a>
<a href=#163 id=163 data-nosnippet>163</a><span class="doccomment">/// Try to decompress from `input` to `output` with the given [`InflateState`]
<a href=#164 id=164 data-nosnippet>164</a>///
<a href=#165 id=165 data-nosnippet>165</a>/// # `flush`
<a href=#166 id=166 data-nosnippet>166</a>///
<a href=#167 id=167 data-nosnippet>167</a>/// Generally, the various [`MZFlush`] flags have meaning only on the compression side. They can be
<a href=#168 id=168 data-nosnippet>168</a>/// supplied here, but the only one that has any semantic meaning is [`MZFlush::Finish`], which is a
<a href=#169 id=169 data-nosnippet>169</a>/// signal that the stream is expected to finish, and failing to do so is an error. It isn't
<a href=#170 id=170 data-nosnippet>170</a>/// necessary to specify it when the stream ends; you'll still get returned a
<a href=#171 id=171 data-nosnippet>171</a>/// [`MZStatus::StreamEnd`] anyway. Other values either have no effect or cause errors. It's
<a href=#172 id=172 data-nosnippet>172</a>/// likely that you'll almost always just want to use [`MZFlush::None`].
<a href=#173 id=173 data-nosnippet>173</a>///
<a href=#174 id=174 data-nosnippet>174</a>/// # Errors
<a href=#175 id=175 data-nosnippet>175</a>///
<a href=#176 id=176 data-nosnippet>176</a>/// Returns [`MZError::Buf`] if the size of the `output` slice is empty or no progress was made due
<a href=#177 id=177 data-nosnippet>177</a>/// to lack of expected input data, or if called with [`MZFlush::Finish`] and input wasn't all
<a href=#178 id=178 data-nosnippet>178</a>/// consumed.
<a href=#179 id=179 data-nosnippet>179</a>///
<a href=#180 id=180 data-nosnippet>180</a>/// Returns [`MZError::Data`] if this or a a previous call failed with an error return from
<a href=#181 id=181 data-nosnippet>181</a>/// [`TINFLStatus`]; probably indicates corrupted data.
<a href=#182 id=182 data-nosnippet>182</a>///
<a href=#183 id=183 data-nosnippet>183</a>/// Returns [`MZError::Stream`] when called with [`MZFlush::Full`] (meaningless on
<a href=#184 id=184 data-nosnippet>184</a>/// decompression), or when called without [`MZFlush::Finish`] after an earlier call with
<a href=#185 id=185 data-nosnippet>185</a>/// [`MZFlush::Finish`] has been made.
<a href=#186 id=186 data-nosnippet>186</a></span><span class="kw">pub fn </span>inflate(
<a href=#187 id=187 data-nosnippet>187</a> state: <span class="kw-2">&amp;mut </span>InflateState,
<a href=#188 id=188 data-nosnippet>188</a> input: <span class="kw-2">&amp;</span>[u8],
<a href=#189 id=189 data-nosnippet>189</a> output: <span class="kw-2">&amp;mut </span>[u8],
<a href=#190 id=190 data-nosnippet>190</a> flush: MZFlush,
<a href=#191 id=191 data-nosnippet>191</a>) -&gt; StreamResult {
<a href=#192 id=192 data-nosnippet>192</a> <span class="kw">let </span><span class="kw-2">mut </span>bytes_consumed = <span class="number">0</span>;
<a href=#193 id=193 data-nosnippet>193</a> <span class="kw">let </span><span class="kw-2">mut </span>bytes_written = <span class="number">0</span>;
<a href=#194 id=194 data-nosnippet>194</a> <span class="kw">let </span><span class="kw-2">mut </span>next_in = input;
<a href=#195 id=195 data-nosnippet>195</a> <span class="kw">let </span><span class="kw-2">mut </span>next_out = output;
<a href=#196 id=196 data-nosnippet>196</a>
<a href=#197 id=197 data-nosnippet>197</a> <span class="kw">if </span>flush == MZFlush::Full {
<a href=#198 id=198 data-nosnippet>198</a> <span class="kw">return </span>StreamResult::error(MZError::Stream);
<a href=#199 id=199 data-nosnippet>199</a> }
<a href=#200 id=200 data-nosnippet>200</a>
<a href=#201 id=201 data-nosnippet>201</a> <span class="kw">let </span><span class="kw-2">mut </span>decomp_flags = <span class="kw">if </span>state.data_format == DataFormat::Zlib {
<a href=#202 id=202 data-nosnippet>202</a> inflate_flags::TINFL_FLAG_COMPUTE_ADLER32
<a href=#203 id=203 data-nosnippet>203</a> } <span class="kw">else </span>{
<a href=#204 id=204 data-nosnippet>204</a> inflate_flags::TINFL_FLAG_IGNORE_ADLER32
<a href=#205 id=205 data-nosnippet>205</a> };
<a href=#206 id=206 data-nosnippet>206</a>
<a href=#207 id=207 data-nosnippet>207</a> <span class="kw">if </span>(state.data_format == DataFormat::Zlib)
<a href=#208 id=208 data-nosnippet>208</a> | (state.data_format == DataFormat::ZLibIgnoreChecksum)
<a href=#209 id=209 data-nosnippet>209</a> {
<a href=#210 id=210 data-nosnippet>210</a> decomp_flags |= inflate_flags::TINFL_FLAG_PARSE_ZLIB_HEADER;
<a href=#211 id=211 data-nosnippet>211</a> }
<a href=#212 id=212 data-nosnippet>212</a>
<a href=#213 id=213 data-nosnippet>213</a> <span class="kw">let </span>first_call = state.first_call;
<a href=#214 id=214 data-nosnippet>214</a> state.first_call = <span class="bool-val">false</span>;
<a href=#215 id=215 data-nosnippet>215</a> <span class="kw">if </span>state.last_status == TINFLStatus::FailedCannotMakeProgress {
<a href=#216 id=216 data-nosnippet>216</a> <span class="kw">return </span>StreamResult::error(MZError::Buf);
<a href=#217 id=217 data-nosnippet>217</a> }
<a href=#218 id=218 data-nosnippet>218</a> <span class="kw">if </span>(state.last_status <span class="kw">as </span>i32) &lt; <span class="number">0 </span>{
<a href=#219 id=219 data-nosnippet>219</a> <span class="kw">return </span>StreamResult::error(MZError::Data);
<a href=#220 id=220 data-nosnippet>220</a> }
<a href=#221 id=221 data-nosnippet>221</a>
<a href=#222 id=222 data-nosnippet>222</a> <span class="kw">if </span>state.has_flushed &amp;&amp; (<span class="macro">flush !</span>= MZFlush::Finish) {
<a href=#223 id=223 data-nosnippet>223</a> <span class="kw">return </span>StreamResult::error(MZError::Stream);
<a href=#224 id=224 data-nosnippet>224</a> }
<a href=#225 id=225 data-nosnippet>225</a> state.has_flushed |= flush == MZFlush::Finish;
<a href=#226 id=226 data-nosnippet>226</a>
<a href=#227 id=227 data-nosnippet>227</a> <span class="kw">if </span>(flush == MZFlush::Finish) &amp;&amp; first_call {
<a href=#228 id=228 data-nosnippet>228</a> decomp_flags |= inflate_flags::TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF;
<a href=#229 id=229 data-nosnippet>229</a>
<a href=#230 id=230 data-nosnippet>230</a> <span class="comment">// The caller is indicating that they want to finish the compression and this is the first call with the current stream
<a href=#231 id=231 data-nosnippet>231</a> // so we can simply write directly to the output buffer.
<a href=#232 id=232 data-nosnippet>232</a> // If there is not enough space for all of the decompressed data we will end up with a failure regardless.
<a href=#233 id=233 data-nosnippet>233</a> </span><span class="kw">let </span>status = decompress(<span class="kw-2">&amp;mut </span>state.decomp, next_in, next_out, <span class="number">0</span>, decomp_flags);
<a href=#234 id=234 data-nosnippet>234</a> <span class="kw">let </span>in_bytes = status.<span class="number">1</span>;
<a href=#235 id=235 data-nosnippet>235</a> <span class="kw">let </span>out_bytes = status.<span class="number">2</span>;
<a href=#236 id=236 data-nosnippet>236</a> <span class="kw">let </span>status = status.<span class="number">0</span>;
<a href=#237 id=237 data-nosnippet>237</a>
<a href=#238 id=238 data-nosnippet>238</a> state.last_status = status;
<a href=#239 id=239 data-nosnippet>239</a>
<a href=#240 id=240 data-nosnippet>240</a> bytes_consumed += in_bytes;
<a href=#241 id=241 data-nosnippet>241</a> bytes_written += out_bytes;
<a href=#242 id=242 data-nosnippet>242</a>
<a href=#243 id=243 data-nosnippet>243</a> <span class="kw">let </span>ret_status = {
<a href=#244 id=244 data-nosnippet>244</a> <span class="kw">if </span>status == TINFLStatus::FailedCannotMakeProgress {
<a href=#245 id=245 data-nosnippet>245</a> <span class="prelude-val">Err</span>(MZError::Buf)
<a href=#246 id=246 data-nosnippet>246</a> } <span class="kw">else if </span>(status <span class="kw">as </span>i32) &lt; <span class="number">0 </span>{
<a href=#247 id=247 data-nosnippet>247</a> <span class="prelude-val">Err</span>(MZError::Data)
<a href=#248 id=248 data-nosnippet>248</a> } <span class="kw">else if </span><span class="macro">status !</span>= TINFLStatus::Done {
<a href=#249 id=249 data-nosnippet>249</a> state.last_status = TINFLStatus::Failed;
<a href=#250 id=250 data-nosnippet>250</a> <span class="prelude-val">Err</span>(MZError::Buf)
<a href=#251 id=251 data-nosnippet>251</a> } <span class="kw">else </span>{
<a href=#252 id=252 data-nosnippet>252</a> <span class="prelude-val">Ok</span>(MZStatus::StreamEnd)
<a href=#253 id=253 data-nosnippet>253</a> }
<a href=#254 id=254 data-nosnippet>254</a> };
<a href=#255 id=255 data-nosnippet>255</a> <span class="kw">return </span>StreamResult {
<a href=#256 id=256 data-nosnippet>256</a> bytes_consumed,
<a href=#257 id=257 data-nosnippet>257</a> bytes_written,
<a href=#258 id=258 data-nosnippet>258</a> status: ret_status,
<a href=#259 id=259 data-nosnippet>259</a> };
<a href=#260 id=260 data-nosnippet>260</a> }
<a href=#261 id=261 data-nosnippet>261</a>
<a href=#262 id=262 data-nosnippet>262</a> <span class="kw">if </span><span class="macro">flush !</span>= MZFlush::Finish {
<a href=#263 id=263 data-nosnippet>263</a> decomp_flags |= inflate_flags::TINFL_FLAG_HAS_MORE_INPUT;
<a href=#264 id=264 data-nosnippet>264</a> }
<a href=#265 id=265 data-nosnippet>265</a>
<a href=#266 id=266 data-nosnippet>266</a> <span class="kw">if </span>state.<span class="macro">dict_avail !</span>= <span class="number">0 </span>{
<a href=#267 id=267 data-nosnippet>267</a> bytes_written += push_dict_out(state, <span class="kw-2">&amp;mut </span>next_out);
<a href=#268 id=268 data-nosnippet>268</a> <span class="kw">return </span>StreamResult {
<a href=#269 id=269 data-nosnippet>269</a> bytes_consumed,
<a href=#270 id=270 data-nosnippet>270</a> bytes_written,
<a href=#271 id=271 data-nosnippet>271</a> status: <span class="prelude-val">Ok</span>(
<a href=#272 id=272 data-nosnippet>272</a> <span class="kw">if </span>(state.last_status == TINFLStatus::Done) &amp;&amp; (state.dict_avail == <span class="number">0</span>) {
<a href=#273 id=273 data-nosnippet>273</a> MZStatus::StreamEnd
<a href=#274 id=274 data-nosnippet>274</a> } <span class="kw">else </span>{
<a href=#275 id=275 data-nosnippet>275</a> MZStatus::Ok
<a href=#276 id=276 data-nosnippet>276</a> },
<a href=#277 id=277 data-nosnippet>277</a> ),
<a href=#278 id=278 data-nosnippet>278</a> };
<a href=#279 id=279 data-nosnippet>279</a> }
<a href=#280 id=280 data-nosnippet>280</a>
<a href=#281 id=281 data-nosnippet>281</a> <span class="kw">let </span>status = inflate_loop(
<a href=#282 id=282 data-nosnippet>282</a> state,
<a href=#283 id=283 data-nosnippet>283</a> <span class="kw-2">&amp;mut </span>next_in,
<a href=#284 id=284 data-nosnippet>284</a> <span class="kw-2">&amp;mut </span>next_out,
<a href=#285 id=285 data-nosnippet>285</a> <span class="kw-2">&amp;mut </span>bytes_consumed,
<a href=#286 id=286 data-nosnippet>286</a> <span class="kw-2">&amp;mut </span>bytes_written,
<a href=#287 id=287 data-nosnippet>287</a> decomp_flags,
<a href=#288 id=288 data-nosnippet>288</a> flush,
<a href=#289 id=289 data-nosnippet>289</a> );
<a href=#290 id=290 data-nosnippet>290</a> StreamResult {
<a href=#291 id=291 data-nosnippet>291</a> bytes_consumed,
<a href=#292 id=292 data-nosnippet>292</a> bytes_written,
<a href=#293 id=293 data-nosnippet>293</a> status,
<a href=#294 id=294 data-nosnippet>294</a> }
<a href=#295 id=295 data-nosnippet>295</a>}
<a href=#296 id=296 data-nosnippet>296</a>
<a href=#297 id=297 data-nosnippet>297</a><span class="kw">fn </span>inflate_loop(
<a href=#298 id=298 data-nosnippet>298</a> state: <span class="kw-2">&amp;mut </span>InflateState,
<a href=#299 id=299 data-nosnippet>299</a> next_in: <span class="kw-2">&amp;mut &amp;</span>[u8],
<a href=#300 id=300 data-nosnippet>300</a> next_out: <span class="kw-2">&amp;mut &amp;mut </span>[u8],
<a href=#301 id=301 data-nosnippet>301</a> total_in: <span class="kw-2">&amp;mut </span>usize,
<a href=#302 id=302 data-nosnippet>302</a> total_out: <span class="kw-2">&amp;mut </span>usize,
<a href=#303 id=303 data-nosnippet>303</a> decomp_flags: u32,
<a href=#304 id=304 data-nosnippet>304</a> flush: MZFlush,
<a href=#305 id=305 data-nosnippet>305</a>) -&gt; MZResult {
<a href=#306 id=306 data-nosnippet>306</a> <span class="kw">let </span>orig_in_len = next_in.len();
<a href=#307 id=307 data-nosnippet>307</a> <span class="kw">loop </span>{
<a href=#308 id=308 data-nosnippet>308</a> <span class="kw">let </span>status = decompress(
<a href=#309 id=309 data-nosnippet>309</a> <span class="kw-2">&amp;mut </span>state.decomp,
<a href=#310 id=310 data-nosnippet>310</a> next_in,
<a href=#311 id=311 data-nosnippet>311</a> <span class="kw-2">&amp;mut </span>state.dict,
<a href=#312 id=312 data-nosnippet>312</a> state.dict_ofs,
<a href=#313 id=313 data-nosnippet>313</a> decomp_flags,
<a href=#314 id=314 data-nosnippet>314</a> );
<a href=#315 id=315 data-nosnippet>315</a>
<a href=#316 id=316 data-nosnippet>316</a> <span class="kw">let </span>in_bytes = status.<span class="number">1</span>;
<a href=#317 id=317 data-nosnippet>317</a> <span class="kw">let </span>out_bytes = status.<span class="number">2</span>;
<a href=#318 id=318 data-nosnippet>318</a> <span class="kw">let </span>status = status.<span class="number">0</span>;
<a href=#319 id=319 data-nosnippet>319</a>
<a href=#320 id=320 data-nosnippet>320</a> state.last_status = status;
<a href=#321 id=321 data-nosnippet>321</a>
<a href=#322 id=322 data-nosnippet>322</a> <span class="kw-2">*</span>next_in = <span class="kw-2">&amp;</span>next_in[in_bytes..];
<a href=#323 id=323 data-nosnippet>323</a> <span class="kw-2">*</span>total_in += in_bytes;
<a href=#324 id=324 data-nosnippet>324</a>
<a href=#325 id=325 data-nosnippet>325</a> state.dict_avail = out_bytes;
<a href=#326 id=326 data-nosnippet>326</a> <span class="kw-2">*</span>total_out += push_dict_out(state, next_out);
<a href=#327 id=327 data-nosnippet>327</a>
<a href=#328 id=328 data-nosnippet>328</a> <span class="comment">// Finish was requested but we didn't end on an end block.
<a href=#329 id=329 data-nosnippet>329</a> </span><span class="kw">if </span>status == TINFLStatus::FailedCannotMakeProgress {
<a href=#330 id=330 data-nosnippet>330</a> <span class="kw">return </span><span class="prelude-val">Err</span>(MZError::Buf);
<a href=#331 id=331 data-nosnippet>331</a> }
<a href=#332 id=332 data-nosnippet>332</a> <span class="comment">// The stream was corrupted, and decompression failed.
<a href=#333 id=333 data-nosnippet>333</a> </span><span class="kw">else if </span>(status <span class="kw">as </span>i32) &lt; <span class="number">0 </span>{
<a href=#334 id=334 data-nosnippet>334</a> <span class="kw">return </span><span class="prelude-val">Err</span>(MZError::Data);
<a href=#335 id=335 data-nosnippet>335</a> }
<a href=#336 id=336 data-nosnippet>336</a>
<a href=#337 id=337 data-nosnippet>337</a> <span class="comment">// The decompressor has flushed all it's data and is waiting for more input, but
<a href=#338 id=338 data-nosnippet>338</a> // there was no more input provided.
<a href=#339 id=339 data-nosnippet>339</a> </span><span class="kw">if </span>(status == TINFLStatus::NeedsMoreInput) &amp;&amp; orig_in_len == <span class="number">0 </span>{
<a href=#340 id=340 data-nosnippet>340</a> <span class="kw">return </span><span class="prelude-val">Err</span>(MZError::Buf);
<a href=#341 id=341 data-nosnippet>341</a> }
<a href=#342 id=342 data-nosnippet>342</a>
<a href=#343 id=343 data-nosnippet>343</a> <span class="kw">if </span>flush == MZFlush::Finish {
<a href=#344 id=344 data-nosnippet>344</a> <span class="kw">if </span>status == TINFLStatus::Done {
<a href=#345 id=345 data-nosnippet>345</a> <span class="comment">// There is not enough space in the output buffer to flush the remaining
<a href=#346 id=346 data-nosnippet>346</a> // decompressed data in the internal buffer.
<a href=#347 id=347 data-nosnippet>347</a> </span><span class="kw">return if </span>state.<span class="macro">dict_avail !</span>= <span class="number">0 </span>{
<a href=#348 id=348 data-nosnippet>348</a> <span class="prelude-val">Err</span>(MZError::Buf)
<a href=#349 id=349 data-nosnippet>349</a> } <span class="kw">else </span>{
<a href=#350 id=350 data-nosnippet>350</a> <span class="prelude-val">Ok</span>(MZStatus::StreamEnd)
<a href=#351 id=351 data-nosnippet>351</a> };
<a href=#352 id=352 data-nosnippet>352</a> <span class="comment">// No more space in the output buffer, but we're not done.
<a href=#353 id=353 data-nosnippet>353</a> </span>} <span class="kw">else if </span>next_out.is_empty() {
<a href=#354 id=354 data-nosnippet>354</a> <span class="kw">return </span><span class="prelude-val">Err</span>(MZError::Buf);
<a href=#355 id=355 data-nosnippet>355</a> }
<a href=#356 id=356 data-nosnippet>356</a> } <span class="kw">else </span>{
<a href=#357 id=357 data-nosnippet>357</a> <span class="comment">// We're not expected to finish, so it's fine if we can't flush everything yet.
<a href=#358 id=358 data-nosnippet>358</a> </span><span class="kw">let </span>empty_buf = next_in.is_empty() || next_out.is_empty();
<a href=#359 id=359 data-nosnippet>359</a> <span class="kw">if </span>(status == TINFLStatus::Done) || empty_buf || (state.<span class="macro">dict_avail !</span>= <span class="number">0</span>) {
<a href=#360 id=360 data-nosnippet>360</a> <span class="kw">return if </span>(status == TINFLStatus::Done) &amp;&amp; (state.dict_avail == <span class="number">0</span>) {
<a href=#361 id=361 data-nosnippet>361</a> <span class="comment">// No more data left, we're done.
<a href=#362 id=362 data-nosnippet>362</a> </span><span class="prelude-val">Ok</span>(MZStatus::StreamEnd)
<a href=#363 id=363 data-nosnippet>363</a> } <span class="kw">else </span>{
<a href=#364 id=364 data-nosnippet>364</a> <span class="comment">// Ok for now, still waiting for more input data or output space.
<a href=#365 id=365 data-nosnippet>365</a> </span><span class="prelude-val">Ok</span>(MZStatus::Ok)
<a href=#366 id=366 data-nosnippet>366</a> };
<a href=#367 id=367 data-nosnippet>367</a> }
<a href=#368 id=368 data-nosnippet>368</a> }
<a href=#369 id=369 data-nosnippet>369</a> }
<a href=#370 id=370 data-nosnippet>370</a>}
<a href=#371 id=371 data-nosnippet>371</a>
<a href=#372 id=372 data-nosnippet>372</a><span class="kw">fn </span>push_dict_out(state: <span class="kw-2">&amp;mut </span>InflateState, next_out: <span class="kw-2">&amp;mut &amp;mut </span>[u8]) -&gt; usize {
<a href=#373 id=373 data-nosnippet>373</a> <span class="kw">let </span>n = cmp::min(state.dict_avail, next_out.len());
<a href=#374 id=374 data-nosnippet>374</a> (next_out[..n]).copy_from_slice(<span class="kw-2">&amp;</span>state.dict[state.dict_ofs..state.dict_ofs + n]);
<a href=#375 id=375 data-nosnippet>375</a> <span class="kw-2">*</span>next_out = <span class="kw-2">&amp;mut </span>mem::take(next_out)[n..];
<a href=#376 id=376 data-nosnippet>376</a> state.dict_avail -= n;
<a href=#377 id=377 data-nosnippet>377</a> state.dict_ofs = (state.dict_ofs + (n)) &amp; (TINFL_LZ_DICT_SIZE - <span class="number">1</span>);
<a href=#378 id=378 data-nosnippet>378</a> n
<a href=#379 id=379 data-nosnippet>379</a>}
<a href=#380 id=380 data-nosnippet>380</a>
<a href=#381 id=381 data-nosnippet>381</a><span class="attr">#[cfg(all(test, feature = <span class="string">"with-alloc"</span>))]
<a href=#382 id=382 data-nosnippet>382</a></span><span class="kw">mod </span>test {
<a href=#383 id=383 data-nosnippet>383</a> <span class="kw">use super</span>::{inflate, InflateState};
<a href=#384 id=384 data-nosnippet>384</a> <span class="kw">use crate</span>::{DataFormat, MZFlush, MZStatus};
<a href=#385 id=385 data-nosnippet>385</a> <span class="kw">use </span>alloc::vec;
<a href=#386 id=386 data-nosnippet>386</a>
<a href=#387 id=387 data-nosnippet>387</a> <span class="attr">#[test]
<a href=#388 id=388 data-nosnippet>388</a> </span><span class="kw">fn </span>test_state() {
<a href=#389 id=389 data-nosnippet>389</a> <span class="kw">let </span>encoded = [
<a href=#390 id=390 data-nosnippet>390</a> <span class="number">120u8</span>, <span class="number">156</span>, <span class="number">243</span>, <span class="number">72</span>, <span class="number">205</span>, <span class="number">201</span>, <span class="number">201</span>, <span class="number">215</span>, <span class="number">81</span>, <span class="number">168</span>, <span class="number">202</span>, <span class="number">201</span>, <span class="number">76</span>, <span class="number">82</span>, <span class="number">4</span>, <span class="number">0</span>, <span class="number">27</span>, <span class="number">101</span>, <span class="number">4</span>,
<a href=#391 id=391 data-nosnippet>391</a> <span class="number">19</span>,
<a href=#392 id=392 data-nosnippet>392</a> ];
<a href=#393 id=393 data-nosnippet>393</a> <span class="kw">let </span><span class="kw-2">mut </span>out = <span class="macro">vec!</span>[<span class="number">0</span>; <span class="number">50</span>];
<a href=#394 id=394 data-nosnippet>394</a> <span class="kw">let </span><span class="kw-2">mut </span>state = InflateState::new_boxed(DataFormat::Zlib);
<a href=#395 id=395 data-nosnippet>395</a> <span class="kw">let </span>res = inflate(<span class="kw-2">&amp;mut </span>state, <span class="kw-2">&amp;</span>encoded, <span class="kw-2">&amp;mut </span>out, MZFlush::Finish);
<a href=#396 id=396 data-nosnippet>396</a> <span class="kw">let </span>status = res.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#397 id=397 data-nosnippet>397</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#398 id=398 data-nosnippet>398</a> <span class="macro">assert_eq!</span>(out[..res.bytes_written <span class="kw">as </span>usize], <span class="string">b"Hello, zlib!"</span>[..]);
<a href=#399 id=399 data-nosnippet>399</a> <span class="macro">assert_eq!</span>(res.bytes_consumed, encoded.len());
<a href=#400 id=400 data-nosnippet>400</a>
<a href=#401 id=401 data-nosnippet>401</a> state.reset_as(<span class="kw">super</span>::ZeroReset);
<a href=#402 id=402 data-nosnippet>402</a> out.iter_mut().map(|x| <span class="kw-2">*</span>x = <span class="number">0</span>).count();
<a href=#403 id=403 data-nosnippet>403</a> <span class="kw">let </span>res = inflate(<span class="kw-2">&amp;mut </span>state, <span class="kw-2">&amp;</span>encoded, <span class="kw-2">&amp;mut </span>out, MZFlush::Finish);
<a href=#404 id=404 data-nosnippet>404</a> <span class="kw">let </span>status = res.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#405 id=405 data-nosnippet>405</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#406 id=406 data-nosnippet>406</a> <span class="macro">assert_eq!</span>(out[..res.bytes_written <span class="kw">as </span>usize], <span class="string">b"Hello, zlib!"</span>[..]);
<a href=#407 id=407 data-nosnippet>407</a> <span class="macro">assert_eq!</span>(res.bytes_consumed, encoded.len());
<a href=#408 id=408 data-nosnippet>408</a>
<a href=#409 id=409 data-nosnippet>409</a> state.reset_as(<span class="kw">super</span>::MinReset);
<a href=#410 id=410 data-nosnippet>410</a> out.iter_mut().map(|x| <span class="kw-2">*</span>x = <span class="number">0</span>).count();
<a href=#411 id=411 data-nosnippet>411</a> <span class="kw">let </span>res = inflate(<span class="kw-2">&amp;mut </span>state, <span class="kw-2">&amp;</span>encoded, <span class="kw-2">&amp;mut </span>out, MZFlush::Finish);
<a href=#412 id=412 data-nosnippet>412</a> <span class="kw">let </span>status = res.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#413 id=413 data-nosnippet>413</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#414 id=414 data-nosnippet>414</a> <span class="macro">assert_eq!</span>(out[..res.bytes_written <span class="kw">as </span>usize], <span class="string">b"Hello, zlib!"</span>[..]);
<a href=#415 id=415 data-nosnippet>415</a> <span class="macro">assert_eq!</span>(res.bytes_consumed, encoded.len());
<a href=#416 id=416 data-nosnippet>416</a> <span class="macro">assert_eq!</span>(state.decompressor().adler32(), <span class="prelude-val">Some</span>(<span class="number">459605011</span>));
<a href=#417 id=417 data-nosnippet>417</a>
<a href=#418 id=418 data-nosnippet>418</a> <span class="comment">// Test state when not computing adler.
<a href=#419 id=419 data-nosnippet>419</a> </span>state = InflateState::new_boxed(DataFormat::ZLibIgnoreChecksum);
<a href=#420 id=420 data-nosnippet>420</a> out.iter_mut().map(|x| <span class="kw-2">*</span>x = <span class="number">0</span>).count();
<a href=#421 id=421 data-nosnippet>421</a> <span class="kw">let </span>res = inflate(<span class="kw-2">&amp;mut </span>state, <span class="kw-2">&amp;</span>encoded, <span class="kw-2">&amp;mut </span>out, MZFlush::Finish);
<a href=#422 id=422 data-nosnippet>422</a> <span class="kw">let </span>status = res.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#423 id=423 data-nosnippet>423</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#424 id=424 data-nosnippet>424</a> <span class="macro">assert_eq!</span>(out[..res.bytes_written <span class="kw">as </span>usize], <span class="string">b"Hello, zlib!"</span>[..]);
<a href=#425 id=425 data-nosnippet>425</a> <span class="macro">assert_eq!</span>(res.bytes_consumed, encoded.len());
<a href=#426 id=426 data-nosnippet>426</a> <span class="comment">// Not computed, so should be Some(1)
<a href=#427 id=427 data-nosnippet>427</a> </span><span class="macro">assert_eq!</span>(state.decompressor().adler32(), <span class="prelude-val">Some</span>(<span class="number">1</span>));
<a href=#428 id=428 data-nosnippet>428</a> <span class="comment">// Should still have the checksum read from the header file.
<a href=#429 id=429 data-nosnippet>429</a> </span><span class="macro">assert_eq!</span>(state.decompressor().adler32_header(), <span class="prelude-val">Some</span>(<span class="number">459605011</span>))
<a href=#430 id=430 data-nosnippet>430</a> }
<a href=#431 id=431 data-nosnippet>431</a>
<a href=#432 id=432 data-nosnippet>432</a> <span class="attr">#[test]
<a href=#433 id=433 data-nosnippet>433</a> </span><span class="kw">fn </span>test_partial_continue() {
<a href=#434 id=434 data-nosnippet>434</a> <span class="kw">let </span>encoded = [
<a href=#435 id=435 data-nosnippet>435</a> <span class="number">120u8</span>, <span class="number">156</span>, <span class="number">243</span>, <span class="number">72</span>, <span class="number">205</span>, <span class="number">201</span>, <span class="number">201</span>, <span class="number">215</span>, <span class="number">81</span>, <span class="number">168</span>, <span class="number">202</span>, <span class="number">201</span>, <span class="number">76</span>, <span class="number">82</span>, <span class="number">4</span>, <span class="number">0</span>, <span class="number">27</span>, <span class="number">101</span>, <span class="number">4</span>,
<a href=#436 id=436 data-nosnippet>436</a> <span class="number">19</span>,
<a href=#437 id=437 data-nosnippet>437</a> ];
<a href=#438 id=438 data-nosnippet>438</a>
<a href=#439 id=439 data-nosnippet>439</a> <span class="comment">// Feed input bytes one at a time to the decompressor
<a href=#440 id=440 data-nosnippet>440</a> </span><span class="kw">let </span><span class="kw-2">mut </span>out = <span class="macro">vec!</span>[<span class="number">0</span>; <span class="number">50</span>];
<a href=#441 id=441 data-nosnippet>441</a> <span class="kw">let </span><span class="kw-2">mut </span>state = InflateState::new_boxed(DataFormat::Zlib);
<a href=#442 id=442 data-nosnippet>442</a> <span class="kw">let </span><span class="kw-2">mut </span>part_in = <span class="number">0</span>;
<a href=#443 id=443 data-nosnippet>443</a> <span class="kw">let </span><span class="kw-2">mut </span>part_out = <span class="number">0</span>;
<a href=#444 id=444 data-nosnippet>444</a> <span class="kw">for </span>i <span class="kw">in </span><span class="number">1</span>..=encoded.len() {
<a href=#445 id=445 data-nosnippet>445</a> <span class="kw">let </span>res = inflate(
<a href=#446 id=446 data-nosnippet>446</a> <span class="kw-2">&amp;mut </span>state,
<a href=#447 id=447 data-nosnippet>447</a> <span class="kw-2">&amp;</span>encoded[part_in..i],
<a href=#448 id=448 data-nosnippet>448</a> <span class="kw-2">&amp;mut </span>out[part_out..],
<a href=#449 id=449 data-nosnippet>449</a> MZFlush::None,
<a href=#450 id=450 data-nosnippet>450</a> );
<a href=#451 id=451 data-nosnippet>451</a> <span class="kw">let </span>status = res.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#452 id=452 data-nosnippet>452</a> <span class="kw">if </span>i == encoded.len() {
<a href=#453 id=453 data-nosnippet>453</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#454 id=454 data-nosnippet>454</a> } <span class="kw">else </span>{
<a href=#455 id=455 data-nosnippet>455</a> <span class="macro">assert_eq!</span>(status, MZStatus::Ok);
<a href=#456 id=456 data-nosnippet>456</a> }
<a href=#457 id=457 data-nosnippet>457</a> part_out += res.bytes_written <span class="kw">as </span>usize;
<a href=#458 id=458 data-nosnippet>458</a> part_in += res.bytes_consumed;
<a href=#459 id=459 data-nosnippet>459</a> }
<a href=#460 id=460 data-nosnippet>460</a>
<a href=#461 id=461 data-nosnippet>461</a> <span class="macro">assert_eq!</span>(out[..part_out <span class="kw">as </span>usize], <span class="string">b"Hello, zlib!"</span>[..]);
<a href=#462 id=462 data-nosnippet>462</a> <span class="macro">assert_eq!</span>(part_in, encoded.len());
<a href=#463 id=463 data-nosnippet>463</a> <span class="macro">assert_eq!</span>(state.decompressor().adler32(), <span class="prelude-val">Some</span>(<span class="number">459605011</span>));
<a href=#464 id=464 data-nosnippet>464</a> }
<a href=#465 id=465 data-nosnippet>465</a>
<a href=#466 id=466 data-nosnippet>466</a> <span class="comment">// Inflate part of a stream and clone the inflate state.
<a href=#467 id=467 data-nosnippet>467</a> // Discard the original state and resume the stream from the clone.
<a href=#468 id=468 data-nosnippet>468</a> </span><span class="attr">#[test]
<a href=#469 id=469 data-nosnippet>469</a> </span><span class="kw">fn </span>test_rewind_and_resume() {
<a href=#470 id=470 data-nosnippet>470</a> <span class="kw">let </span>encoded = [
<a href=#471 id=471 data-nosnippet>471</a> <span class="number">120u8</span>, <span class="number">156</span>, <span class="number">243</span>, <span class="number">72</span>, <span class="number">205</span>, <span class="number">201</span>, <span class="number">201</span>, <span class="number">215</span>, <span class="number">81</span>, <span class="number">168</span>, <span class="number">202</span>, <span class="number">201</span>, <span class="number">76</span>, <span class="number">82</span>, <span class="number">4</span>, <span class="number">0</span>, <span class="number">27</span>, <span class="number">101</span>, <span class="number">4</span>,
<a href=#472 id=472 data-nosnippet>472</a> <span class="number">19</span>,
<a href=#473 id=473 data-nosnippet>473</a> ];
<a href=#474 id=474 data-nosnippet>474</a> <span class="kw">let </span>decoded = <span class="string">b"Hello, zlib!"</span>;
<a href=#475 id=475 data-nosnippet>475</a>
<a href=#476 id=476 data-nosnippet>476</a> <span class="comment">// Feed partial input bytes to the decompressor
<a href=#477 id=477 data-nosnippet>477</a> </span><span class="kw">let </span><span class="kw-2">mut </span>out = <span class="macro">vec!</span>[<span class="number">0</span>; <span class="number">50</span>];
<a href=#478 id=478 data-nosnippet>478</a> <span class="kw">let </span><span class="kw-2">mut </span>state = InflateState::new_boxed(DataFormat::Zlib);
<a href=#479 id=479 data-nosnippet>479</a> <span class="kw">let </span>res1 = inflate(<span class="kw-2">&amp;mut </span>state, <span class="kw-2">&amp;</span>encoded[..<span class="number">10</span>], <span class="kw-2">&amp;mut </span>out, MZFlush::None);
<a href=#480 id=480 data-nosnippet>480</a> <span class="kw">let </span>status = res1.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#481 id=481 data-nosnippet>481</a> <span class="macro">assert_eq!</span>(status, MZStatus::Ok);
<a href=#482 id=482 data-nosnippet>482</a>
<a href=#483 id=483 data-nosnippet>483</a> <span class="comment">// Clone the state and discard the original
<a href=#484 id=484 data-nosnippet>484</a> </span><span class="kw">let </span><span class="kw-2">mut </span>resume = state.clone();
<a href=#485 id=485 data-nosnippet>485</a> drop(state);
<a href=#486 id=486 data-nosnippet>486</a>
<a href=#487 id=487 data-nosnippet>487</a> <span class="comment">// Resume the stream using the cloned state
<a href=#488 id=488 data-nosnippet>488</a> </span><span class="kw">let </span>res2 = inflate(
<a href=#489 id=489 data-nosnippet>489</a> <span class="kw-2">&amp;mut </span>resume,
<a href=#490 id=490 data-nosnippet>490</a> <span class="kw-2">&amp;</span>encoded[res1.bytes_consumed..],
<a href=#491 id=491 data-nosnippet>491</a> <span class="kw-2">&amp;mut </span>out[res1.bytes_written..],
<a href=#492 id=492 data-nosnippet>492</a> MZFlush::Finish,
<a href=#493 id=493 data-nosnippet>493</a> );
<a href=#494 id=494 data-nosnippet>494</a> <span class="kw">let </span>status = res2.status.expect(<span class="string">"Failed to decompress!"</span>);
<a href=#495 id=495 data-nosnippet>495</a> <span class="macro">assert_eq!</span>(status, MZStatus::StreamEnd);
<a href=#496 id=496 data-nosnippet>496</a>
<a href=#497 id=497 data-nosnippet>497</a> <span class="macro">assert_eq!</span>(res1.bytes_consumed + res2.bytes_consumed, encoded.len());
<a href=#498 id=498 data-nosnippet>498</a> <span class="macro">assert_eq!</span>(res1.bytes_written + res2.bytes_written, decoded.len());
<a href=#499 id=499 data-nosnippet>499</a> <span class="macro">assert_eq!</span>(
<a href=#500 id=500 data-nosnippet>500</a> <span class="kw-2">&amp;</span>out[..res1.bytes_written + res2.bytes_written <span class="kw">as </span>usize],
<a href=#501 id=501 data-nosnippet>501</a> decoded
<a href=#502 id=502 data-nosnippet>502</a> );
<a href=#503 id=503 data-nosnippet>503</a> <span class="macro">assert_eq!</span>(resume.decompressor().adler32(), <span class="prelude-val">Some</span>(<span class="number">459605011</span>));
<a href=#504 id=504 data-nosnippet>504</a> }
<a href=#505 id=505 data-nosnippet>505</a>}
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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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/lib.rs`."><title>lib.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/</div>lib.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! A pure rust replacement for the [miniz](https://github.com/richgel999/miniz)
<a href=#2 id=2 data-nosnippet>2</a>//! DEFLATE/zlib encoder/decoder.
<a href=#3 id=3 data-nosnippet>3</a>//! Used a rust back-end for the
<a href=#4 id=4 data-nosnippet>4</a>//! [flate2](https://github.com/alexcrichton/flate2-rs) crate.
<a href=#5 id=5 data-nosnippet>5</a>//!
<a href=#6 id=6 data-nosnippet>6</a></span><span class="attr">#![cfg_attr(
<a href=#7 id=7 data-nosnippet>7</a> feature = <span class="string">"with-alloc"</span>,
<a href=#8 id=8 data-nosnippet>8</a> doc = <span class="string">r##"
<a href=#9 id=9 data-nosnippet>9</a># Usage
<a href=#10 id=10 data-nosnippet>10</a>## Simple compression/decompression:
<a href=#11 id=11 data-nosnippet>11</a>``` rust
<a href=#12 id=12 data-nosnippet>12</a>
<a href=#13 id=13 data-nosnippet>13</a>use miniz_oxide::inflate::decompress_to_vec;
<a href=#14 id=14 data-nosnippet>14</a>use miniz_oxide::deflate::compress_to_vec;
<a href=#15 id=15 data-nosnippet>15</a>
<a href=#16 id=16 data-nosnippet>16</a>fn roundtrip(data: &amp;[u8]) {
<a href=#17 id=17 data-nosnippet>17</a> let compressed = compress_to_vec(data, 6);
<a href=#18 id=18 data-nosnippet>18</a> let decompressed = decompress_to_vec(compressed.as_slice()).expect("Failed to decompress!");
<a href=#19 id=19 data-nosnippet>19</a># let _ = decompressed;
<a href=#20 id=20 data-nosnippet>20</a>}
<a href=#21 id=21 data-nosnippet>21</a>
<a href=#22 id=22 data-nosnippet>22</a># roundtrip(b"Test_data test data lalalal blabla");
<a href=#23 id=23 data-nosnippet>23</a>"##
<a href=#24 id=24 data-nosnippet>24</a></span>)]
<a href=#25 id=25 data-nosnippet>25</a>#![forbid(unsafe_code)]
<a href=#26 id=26 data-nosnippet>26</a>#![cfg_attr(all(not(feature = <span class="string">"std"</span>), not(feature = <span class="string">"serde"</span>)), no_std)]
<a href=#27 id=27 data-nosnippet>27</a>
<a href=#28 id=28 data-nosnippet>28</a>#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#29 id=29 data-nosnippet>29</a></span><span class="kw">extern crate </span>alloc;
<a href=#30 id=30 data-nosnippet>30</a>
<a href=#31 id=31 data-nosnippet>31</a><span class="attr">#[cfg(feature = <span class="string">"with-alloc"</span>)]
<a href=#32 id=32 data-nosnippet>32</a></span><span class="kw">pub mod </span>deflate;
<a href=#33 id=33 data-nosnippet>33</a><span class="kw">pub mod </span>inflate;
<a href=#34 id=34 data-nosnippet>34</a><span class="attr">#[cfg(feature = <span class="string">"serde"</span>)]
<a href=#35 id=35 data-nosnippet>35</a></span><span class="kw">pub mod </span>serde;
<a href=#36 id=36 data-nosnippet>36</a><span class="kw">mod </span>shared;
<a href=#37 id=37 data-nosnippet>37</a>
<a href=#38 id=38 data-nosnippet>38</a><span class="kw">pub use </span><span class="kw">crate</span>::shared::update_adler32 <span class="kw">as </span>mz_adler32_oxide;
<a href=#39 id=39 data-nosnippet>39</a><span class="kw">pub use </span><span class="kw">crate</span>::shared::{MZ_ADLER32_INIT, MZ_DEFAULT_WINDOW_BITS};
<a href=#40 id=40 data-nosnippet>40</a>
<a href=#41 id=41 data-nosnippet>41</a><span class="doccomment">/// A list of flush types.
<a href=#42 id=42 data-nosnippet>42</a>///
<a href=#43 id=43 data-nosnippet>43</a>/// See &lt;http://www.bolet.org/~pornin/deflate-flush.html&gt; for more in-depth info.
<a href=#44 id=44 data-nosnippet>44</a></span><span class="attr">#[repr(i32)]
<a href=#45 id=45 data-nosnippet>45</a>#[derive(Copy, Clone, PartialEq, Eq)]
<a href=#46 id=46 data-nosnippet>46</a>#[cfg_attr(not(feature = <span class="string">"rustc-dep-of-std"</span>), derive(Hash, Debug))]
<a href=#47 id=47 data-nosnippet>47</a></span><span class="kw">pub enum </span>MZFlush {
<a href=#48 id=48 data-nosnippet>48</a> <span class="doccomment">/// Don't force any flushing.
<a href=#49 id=49 data-nosnippet>49</a> /// Used when more input data is expected.
<a href=#50 id=50 data-nosnippet>50</a> </span><span class="prelude-val">None </span>= <span class="number">0</span>,
<a href=#51 id=51 data-nosnippet>51</a> <span class="doccomment">/// Zlib partial flush.
<a href=#52 id=52 data-nosnippet>52</a> /// Currently treated as [`Sync`].
<a href=#53 id=53 data-nosnippet>53</a> </span>Partial = <span class="number">1</span>,
<a href=#54 id=54 data-nosnippet>54</a> <span class="doccomment">/// Finish compressing the currently buffered data, and output an empty raw block.
<a href=#55 id=55 data-nosnippet>55</a> /// Has no use in decompression.
<a href=#56 id=56 data-nosnippet>56</a> </span>Sync = <span class="number">2</span>,
<a href=#57 id=57 data-nosnippet>57</a> <span class="doccomment">/// Same as [`Sync`], but resets the compression dictionary so that further compressed
<a href=#58 id=58 data-nosnippet>58</a> /// data does not depend on data compressed before the flush.
<a href=#59 id=59 data-nosnippet>59</a> ///
<a href=#60 id=60 data-nosnippet>60</a> /// Has no use in decompression, and is an error to supply in that case.
<a href=#61 id=61 data-nosnippet>61</a> </span>Full = <span class="number">3</span>,
<a href=#62 id=62 data-nosnippet>62</a> <span class="doccomment">/// Attempt to flush the remaining data and end the stream.
<a href=#63 id=63 data-nosnippet>63</a> </span>Finish = <span class="number">4</span>,
<a href=#64 id=64 data-nosnippet>64</a> <span class="doccomment">/// Not implemented.
<a href=#65 id=65 data-nosnippet>65</a> </span>Block = <span class="number">5</span>,
<a href=#66 id=66 data-nosnippet>66</a>}
<a href=#67 id=67 data-nosnippet>67</a>
<a href=#68 id=68 data-nosnippet>68</a><span class="kw">impl </span>MZFlush {
<a href=#69 id=69 data-nosnippet>69</a> <span class="doccomment">/// Create an MZFlush value from an integer value.
<a href=#70 id=70 data-nosnippet>70</a> ///
<a href=#71 id=71 data-nosnippet>71</a> /// Returns `MZError::Param` on invalid values.
<a href=#72 id=72 data-nosnippet>72</a> </span><span class="kw">pub fn </span>new(flush: i32) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, MZError&gt; {
<a href=#73 id=73 data-nosnippet>73</a> <span class="kw">match </span>flush {
<a href=#74 id=74 data-nosnippet>74</a> <span class="number">0 </span>=&gt; <span class="prelude-val">Ok</span>(MZFlush::None),
<a href=#75 id=75 data-nosnippet>75</a> <span class="number">1 </span>| <span class="number">2 </span>=&gt; <span class="prelude-val">Ok</span>(MZFlush::Sync),
<a href=#76 id=76 data-nosnippet>76</a> <span class="number">3 </span>=&gt; <span class="prelude-val">Ok</span>(MZFlush::Full),
<a href=#77 id=77 data-nosnippet>77</a> <span class="number">4 </span>=&gt; <span class="prelude-val">Ok</span>(MZFlush::Finish),
<a href=#78 id=78 data-nosnippet>78</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(MZError::Param),
<a href=#79 id=79 data-nosnippet>79</a> }
<a href=#80 id=80 data-nosnippet>80</a> }
<a href=#81 id=81 data-nosnippet>81</a>}
<a href=#82 id=82 data-nosnippet>82</a>
<a href=#83 id=83 data-nosnippet>83</a><span class="doccomment">/// A list of miniz successful status codes.
<a href=#84 id=84 data-nosnippet>84</a>///
<a href=#85 id=85 data-nosnippet>85</a>/// These are emitted as the [`Ok`] side of a [`MZResult`] in the [`StreamResult`] returned from
<a href=#86 id=86 data-nosnippet>86</a>/// [`deflate::stream::deflate()`] or [`inflate::stream::inflate()`].
<a href=#87 id=87 data-nosnippet>87</a></span><span class="attr">#[repr(i32)]
<a href=#88 id=88 data-nosnippet>88</a>#[derive(Copy, Clone, PartialEq, Eq)]
<a href=#89 id=89 data-nosnippet>89</a>#[cfg_attr(not(feature = <span class="string">"rustc-dep-of-std"</span>), derive(Hash, Debug))]
<a href=#90 id=90 data-nosnippet>90</a></span><span class="kw">pub enum </span>MZStatus {
<a href=#91 id=91 data-nosnippet>91</a> <span class="doccomment">/// Operation succeeded.
<a href=#92 id=92 data-nosnippet>92</a> ///
<a href=#93 id=93 data-nosnippet>93</a> /// Some data was decompressed or compressed; see the byte counters in the [`StreamResult`] for
<a href=#94 id=94 data-nosnippet>94</a> /// details.
<a href=#95 id=95 data-nosnippet>95</a> </span><span class="prelude-val">Ok </span>= <span class="number">0</span>,
<a href=#96 id=96 data-nosnippet>96</a>
<a href=#97 id=97 data-nosnippet>97</a> <span class="doccomment">/// Operation succeeded and end of deflate stream was found.
<a href=#98 id=98 data-nosnippet>98</a> ///
<a href=#99 id=99 data-nosnippet>99</a> /// X-ref [`TINFLStatus::Done`][inflate::TINFLStatus::Done] or
<a href=#100 id=100 data-nosnippet>100</a> /// [`TDEFLStatus::Done`][deflate::core::TDEFLStatus::Done] for `inflate` or `deflate`
<a href=#101 id=101 data-nosnippet>101</a> /// respectively.
<a href=#102 id=102 data-nosnippet>102</a> </span>StreamEnd = <span class="number">1</span>,
<a href=#103 id=103 data-nosnippet>103</a>
<a href=#104 id=104 data-nosnippet>104</a> <span class="doccomment">/// Unused
<a href=#105 id=105 data-nosnippet>105</a> </span>NeedDict = <span class="number">2</span>,
<a href=#106 id=106 data-nosnippet>106</a>}
<a href=#107 id=107 data-nosnippet>107</a>
<a href=#108 id=108 data-nosnippet>108</a><span class="doccomment">/// A list of miniz failed status codes.
<a href=#109 id=109 data-nosnippet>109</a>///
<a href=#110 id=110 data-nosnippet>110</a>/// These are emitted as the [`Err`] side of a [`MZResult`] in the [`StreamResult`] returned from
<a href=#111 id=111 data-nosnippet>111</a>/// [`deflate::stream::deflate()`] or [`inflate::stream::inflate()`].
<a href=#112 id=112 data-nosnippet>112</a></span><span class="attr">#[repr(i32)]
<a href=#113 id=113 data-nosnippet>113</a>#[cfg_attr(not(feature = <span class="string">"rustc-dep-of-std"</span>), derive(Hash, Debug))]
<a href=#114 id=114 data-nosnippet>114</a>#[derive(Copy, Clone, PartialEq, Eq)]
<a href=#115 id=115 data-nosnippet>115</a></span><span class="kw">pub enum </span>MZError {
<a href=#116 id=116 data-nosnippet>116</a> <span class="doccomment">/// Unused
<a href=#117 id=117 data-nosnippet>117</a> </span>ErrNo = -<span class="number">1</span>,
<a href=#118 id=118 data-nosnippet>118</a>
<a href=#119 id=119 data-nosnippet>119</a> <span class="doccomment">/// General stream error.
<a href=#120 id=120 data-nosnippet>120</a> ///
<a href=#121 id=121 data-nosnippet>121</a> /// See [`inflate::stream::inflate()`] docs for details of how it can occur there.
<a href=#122 id=122 data-nosnippet>122</a> ///
<a href=#123 id=123 data-nosnippet>123</a> /// See [`deflate::stream::deflate()`] docs for how it can in principle occur there, though it's
<a href=#124 id=124 data-nosnippet>124</a> /// believed impossible in practice.
<a href=#125 id=125 data-nosnippet>125</a> </span>Stream = -<span class="number">2</span>,
<a href=#126 id=126 data-nosnippet>126</a>
<a href=#127 id=127 data-nosnippet>127</a> <span class="doccomment">/// Error in inflation; see [`inflate::stream::inflate()`] for details.
<a href=#128 id=128 data-nosnippet>128</a> ///
<a href=#129 id=129 data-nosnippet>129</a> /// Not returned from [`deflate::stream::deflate()`].
<a href=#130 id=130 data-nosnippet>130</a> </span>Data = -<span class="number">3</span>,
<a href=#131 id=131 data-nosnippet>131</a>
<a href=#132 id=132 data-nosnippet>132</a> <span class="doccomment">/// Unused
<a href=#133 id=133 data-nosnippet>133</a> </span>Mem = -<span class="number">4</span>,
<a href=#134 id=134 data-nosnippet>134</a>
<a href=#135 id=135 data-nosnippet>135</a> <span class="doccomment">/// Buffer-related error.
<a href=#136 id=136 data-nosnippet>136</a> ///
<a href=#137 id=137 data-nosnippet>137</a> /// See the docs of [`deflate::stream::deflate()`] or [`inflate::stream::inflate()`] for details
<a href=#138 id=138 data-nosnippet>138</a> /// of when it would trigger in the one you're using.
<a href=#139 id=139 data-nosnippet>139</a> </span>Buf = -<span class="number">5</span>,
<a href=#140 id=140 data-nosnippet>140</a>
<a href=#141 id=141 data-nosnippet>141</a> <span class="doccomment">/// Unused
<a href=#142 id=142 data-nosnippet>142</a> </span>Version = -<span class="number">6</span>,
<a href=#143 id=143 data-nosnippet>143</a>
<a href=#144 id=144 data-nosnippet>144</a> <span class="doccomment">/// Bad parameters.
<a href=#145 id=145 data-nosnippet>145</a> ///
<a href=#146 id=146 data-nosnippet>146</a> /// This can be returned from [`deflate::stream::deflate()`] in the case of bad parameters. See
<a href=#147 id=147 data-nosnippet>147</a> /// [`TDEFLStatus::BadParam`][deflate::core::TDEFLStatus::BadParam].
<a href=#148 id=148 data-nosnippet>148</a> </span>Param = -<span class="number">10_000</span>,
<a href=#149 id=149 data-nosnippet>149</a>}
<a href=#150 id=150 data-nosnippet>150</a>
<a href=#151 id=151 data-nosnippet>151</a><span class="doccomment">/// How compressed data is wrapped.
<a href=#152 id=152 data-nosnippet>152</a></span><span class="attr">#[derive(Copy, Clone, PartialEq, Eq)]
<a href=#153 id=153 data-nosnippet>153</a>#[cfg_attr(not(feature = <span class="string">"rustc-dep-of-std"</span>), derive(Hash, Debug))]
<a href=#154 id=154 data-nosnippet>154</a>#[non_exhaustive]
<a href=#155 id=155 data-nosnippet>155</a></span><span class="kw">pub enum </span>DataFormat {
<a href=#156 id=156 data-nosnippet>156</a> <span class="doccomment">/// Wrapped using the [zlib](http://www.zlib.org/rfc-zlib.html) format.
<a href=#157 id=157 data-nosnippet>157</a> </span>Zlib,
<a href=#158 id=158 data-nosnippet>158</a> <span class="doccomment">/// Zlib wrapped but ignore and don't compute the adler32 checksum.
<a href=#159 id=159 data-nosnippet>159</a> /// Currently only used for inflate, behaves the same as Zlib for compression.
<a href=#160 id=160 data-nosnippet>160</a> </span>ZLibIgnoreChecksum,
<a href=#161 id=161 data-nosnippet>161</a> <span class="doccomment">/// Raw DEFLATE.
<a href=#162 id=162 data-nosnippet>162</a> </span>Raw,
<a href=#163 id=163 data-nosnippet>163</a>}
<a href=#164 id=164 data-nosnippet>164</a>
<a href=#165 id=165 data-nosnippet>165</a><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#166 id=166 data-nosnippet>166</a></span><span class="kw">impl </span>DataFormat {
<a href=#167 id=167 data-nosnippet>167</a> <span class="kw">pub fn </span>from_window_bits(window_bits: i32) -&gt; DataFormat {
<a href=#168 id=168 data-nosnippet>168</a> <span class="kw">if </span>window_bits &gt; <span class="number">0 </span>{
<a href=#169 id=169 data-nosnippet>169</a> DataFormat::Zlib
<a href=#170 id=170 data-nosnippet>170</a> } <span class="kw">else </span>{
<a href=#171 id=171 data-nosnippet>171</a> DataFormat::Raw
<a href=#172 id=172 data-nosnippet>172</a> }
<a href=#173 id=173 data-nosnippet>173</a> }
<a href=#174 id=174 data-nosnippet>174</a>
<a href=#175 id=175 data-nosnippet>175</a> <span class="kw">pub fn </span>to_window_bits(<span class="self">self</span>) -&gt; i32 {
<a href=#176 id=176 data-nosnippet>176</a> <span class="kw">match </span><span class="self">self </span>{
<a href=#177 id=177 data-nosnippet>177</a> DataFormat::Zlib | DataFormat::ZLibIgnoreChecksum =&gt; shared::MZ_DEFAULT_WINDOW_BITS,
<a href=#178 id=178 data-nosnippet>178</a> DataFormat::Raw =&gt; -shared::MZ_DEFAULT_WINDOW_BITS,
<a href=#179 id=179 data-nosnippet>179</a> }
<a href=#180 id=180 data-nosnippet>180</a> }
<a href=#181 id=181 data-nosnippet>181</a>}
<a href=#182 id=182 data-nosnippet>182</a>
<a href=#183 id=183 data-nosnippet>183</a><span class="doccomment">/// `Result` alias for all miniz status codes both successful and failed.
<a href=#184 id=184 data-nosnippet>184</a></span><span class="kw">pub type </span>MZResult = <span class="prelude-ty">Result</span>&lt;MZStatus, MZError&gt;;
<a href=#185 id=185 data-nosnippet>185</a>
<a href=#186 id=186 data-nosnippet>186</a><span class="doccomment">/// A structure containing the result of a call to the inflate or deflate streaming functions.
<a href=#187 id=187 data-nosnippet>187</a></span><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#188 id=188 data-nosnippet>188</a>#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
<a href=#189 id=189 data-nosnippet>189</a></span><span class="kw">pub struct </span>StreamResult {
<a href=#190 id=190 data-nosnippet>190</a> <span class="doccomment">/// The number of bytes consumed from the input slice.
<a href=#191 id=191 data-nosnippet>191</a> </span><span class="kw">pub </span>bytes_consumed: usize,
<a href=#192 id=192 data-nosnippet>192</a> <span class="doccomment">/// The number of bytes written to the output slice.
<a href=#193 id=193 data-nosnippet>193</a> </span><span class="kw">pub </span>bytes_written: usize,
<a href=#194 id=194 data-nosnippet>194</a> <span class="doccomment">/// The return status of the call.
<a href=#195 id=195 data-nosnippet>195</a> </span><span class="kw">pub </span>status: MZResult,
<a href=#196 id=196 data-nosnippet>196</a>}
<a href=#197 id=197 data-nosnippet>197</a>
<a href=#198 id=198 data-nosnippet>198</a><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#199 id=199 data-nosnippet>199</a></span><span class="kw">impl </span>StreamResult {
<a href=#200 id=200 data-nosnippet>200</a> <span class="attr">#[inline]
<a href=#201 id=201 data-nosnippet>201</a> </span><span class="kw">pub const fn </span>error(error: MZError) -&gt; StreamResult {
<a href=#202 id=202 data-nosnippet>202</a> StreamResult {
<a href=#203 id=203 data-nosnippet>203</a> bytes_consumed: <span class="number">0</span>,
<a href=#204 id=204 data-nosnippet>204</a> bytes_written: <span class="number">0</span>,
<a href=#205 id=205 data-nosnippet>205</a> status: <span class="prelude-val">Err</span>(error),
<a href=#206 id=206 data-nosnippet>206</a> }
<a href=#207 id=207 data-nosnippet>207</a> }
<a href=#208 id=208 data-nosnippet>208</a>}
<a href=#209 id=209 data-nosnippet>209</a>
<a href=#210 id=210 data-nosnippet>210</a><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#211 id=211 data-nosnippet>211</a></span><span class="kw">impl </span>core::convert::From&lt;StreamResult&gt; <span class="kw">for </span>MZResult {
<a href=#212 id=212 data-nosnippet>212</a> <span class="kw">fn </span>from(res: StreamResult) -&gt; <span class="self">Self </span>{
<a href=#213 id=213 data-nosnippet>213</a> res.status
<a href=#214 id=214 data-nosnippet>214</a> }
<a href=#215 id=215 data-nosnippet>215</a>}
<a href=#216 id=216 data-nosnippet>216</a>
<a href=#217 id=217 data-nosnippet>217</a><span class="attr">#[cfg(not(feature = <span class="string">"rustc-dep-of-std"</span>))]
<a href=#218 id=218 data-nosnippet>218</a></span><span class="kw">impl </span>core::convert::From&lt;<span class="kw-2">&amp;</span>StreamResult&gt; <span class="kw">for </span>MZResult {
<a href=#219 id=219 data-nosnippet>219</a> <span class="kw">fn </span>from(res: <span class="kw-2">&amp;</span>StreamResult) -&gt; <span class="self">Self </span>{
<a href=#220 id=220 data-nosnippet>220</a> res.status
<a href=#221 id=221 data-nosnippet>221</a> }
<a href=#222 id=222 data-nosnippet>222</a>}
</code></pre></div></section></main></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="Source of the Rust file `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/miniz_oxide-0.8.9/src/shared.rs`."><title>shared.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="miniz_oxide" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">miniz_oxide/</div>shared.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-2"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="attr">#[doc(hidden)]
<a href=#2 id=2 data-nosnippet>2</a></span><span class="kw">pub const </span>MZ_ADLER32_INIT: u32 = <span class="number">1</span>;
<a href=#3 id=3 data-nosnippet>3</a>
<a href=#4 id=4 data-nosnippet>4</a><span class="attr">#[doc(hidden)]
<a href=#5 id=5 data-nosnippet>5</a></span><span class="kw">pub const </span>MZ_DEFAULT_WINDOW_BITS: i32 = <span class="number">15</span>;
<a href=#6 id=6 data-nosnippet>6</a>
<a href=#7 id=7 data-nosnippet>7</a><span class="kw">pub const </span>HUFFMAN_LENGTH_ORDER: [u8; <span class="number">19</span>] = [
<a href=#8 id=8 data-nosnippet>8</a> <span class="number">16</span>, <span class="number">17</span>, <span class="number">18</span>, <span class="number">0</span>, <span class="number">8</span>, <span class="number">7</span>, <span class="number">9</span>, <span class="number">6</span>, <span class="number">10</span>, <span class="number">5</span>, <span class="number">11</span>, <span class="number">4</span>, <span class="number">12</span>, <span class="number">3</span>, <span class="number">13</span>, <span class="number">2</span>, <span class="number">14</span>, <span class="number">1</span>, <span class="number">15</span>,
<a href=#9 id=9 data-nosnippet>9</a>];
<a href=#10 id=10 data-nosnippet>10</a>
<a href=#11 id=11 data-nosnippet>11</a><span class="attr">#[doc(hidden)]
<a href=#12 id=12 data-nosnippet>12</a>#[cfg(not(feature = <span class="string">"simd"</span>))]
<a href=#13 id=13 data-nosnippet>13</a></span><span class="kw">pub fn </span>update_adler32(adler: u32, data: <span class="kw-2">&amp;</span>[u8]) -&gt; u32 {
<a href=#14 id=14 data-nosnippet>14</a> <span class="kw">let </span><span class="kw-2">mut </span>hash = adler2::Adler32::from_checksum(adler);
<a href=#15 id=15 data-nosnippet>15</a> hash.write_slice(data);
<a href=#16 id=16 data-nosnippet>16</a> hash.checksum()
<a href=#17 id=17 data-nosnippet>17</a>}
<a href=#18 id=18 data-nosnippet>18</a>
<a href=#19 id=19 data-nosnippet>19</a><span class="attr">#[doc(hidden)]
<a href=#20 id=20 data-nosnippet>20</a>#[cfg(feature = <span class="string">"simd"</span>)]
<a href=#21 id=21 data-nosnippet>21</a></span><span class="kw">pub fn </span>update_adler32(adler: u32, data: <span class="kw-2">&amp;</span>[u8]) -&gt; u32 {
<a href=#22 id=22 data-nosnippet>22</a> <span class="kw">let </span><span class="kw-2">mut </span>hash = simd_adler32::Adler32::from_checksum(adler);
<a href=#23 id=23 data-nosnippet>23</a> hash.write(data);
<a href=#24 id=24 data-nosnippet>24</a> hash.finish()
<a href=#25 id=25 data-nosnippet>25</a>}
</code></pre></div></section></main></body></html>