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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="ZSTD_CCtx_loadDictionary() : Requires v1.4.0+ Create an internal CDict from `dict` buffer. Decompression will have to use same dictionary. @result : 0, or an error code (which can be tested with ZSTD_isError()). Special: Loading a NULL (or 0-size) dictionary invalidates previous dictionary, meaning “return to no-dictionary mode”. Note 1 : Dictionary is sticky, it will be used for all future compressed frames, until parameters are reset, a new dictionary is loaded, or the dictionary is explicitly invalidated by loading a NULL dictionary. Note 2 : Loading a dictionary involves building tables. It’s also a CPU consuming operation, with non-negligible impact on latency. Tables are dependent on compression parameters, and for this reason, compression parameters can no longer be changed after loading a dictionary. Note 3 :`dict` content will be copied internally. Use experimental ZSTD_CCtx_loadDictionary_byReference() to reference content instead. In such a case, dictionary buffer must outlive its users. Note 4 : Use ZSTD_CCtx_loadDictionary_advanced() to precisely select how dictionary content must be interpreted. Note 5 : This method does not benefit from LDM (long distance mode). If you want to employ LDM on some large dictionary content, prefer employing ZSTD_CCtx_refPrefix() described below."><title>ZSTD_CCtx_loadDictionary in zstd_sys - Rust</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="zstd_sys" 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="sidebar-items.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 fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">ZSTD_CCtx_loadDictionary</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../zstd_sys/index.html">zstd_<wbr>sys</a><span class="version">2.0.16+zstd.1.5.7</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="index.html">zstd_sys</a></div><h1>Function <span class="fn">ZSTD_<wbr>CCtx_<wbr>load<wbr>Dictionary</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/zstd_sys/bindings_zstd.rs.html#566-570">Source</a> </span></div><pre class="rust item-decl"><code>pub unsafe extern "C" fn ZSTD_CCtx_loadDictionary(
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cctx: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/core/primitive.pointer.html">*mut </a><a class="type" href="type.ZSTD_CCtx.html" title="type zstd_sys::ZSTD_CCtx">ZSTD_CCtx</a>,
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dict: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/core/primitive.pointer.html">*const </a><a class="enum" href="https://doc.rust-lang.org/1.93.1/core/ffi/enum.c_void.html" title="enum core::ffi::c_void">c_void</a>,
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dictSize: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/core/primitive.usize.html">usize</a>,
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) -> <a class="primitive" href="https://doc.rust-lang.org/1.93.1/core/primitive.usize.html">usize</a></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>ZSTD_CCtx_loadDictionary() : Requires v1.4.0+
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Create an internal CDict from <code>dict</code> buffer.
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Decompression will have to use same dictionary.
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@result : 0, or an error code (which can be tested with ZSTD_isError()).
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Special: Loading a NULL (or 0-size) dictionary invalidates previous dictionary,
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meaning “return to no-dictionary mode”.
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Note 1 : Dictionary is sticky, it will be used for all future compressed frames,
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until parameters are reset, a new dictionary is loaded, or the dictionary
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is explicitly invalidated by loading a NULL dictionary.
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Note 2 : Loading a dictionary involves building tables.
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It’s also a CPU consuming operation, with non-negligible impact on latency.
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Tables are dependent on compression parameters, and for this reason,
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compression parameters can no longer be changed after loading a dictionary.
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Note 3 :<code>dict</code> content will be copied internally.
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Use experimental ZSTD_CCtx_loadDictionary_byReference() to reference content instead.
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In such a case, dictionary buffer must outlive its users.
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Note 4 : Use ZSTD_CCtx_loadDictionary_advanced()
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to precisely select how dictionary content must be interpreted.
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Note 5 : This method does not benefit from LDM (long distance mode).
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If you want to employ LDM on some large dictionary content,
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prefer employing ZSTD_CCtx_refPrefix() described below.</p>
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</div></details></section></div></main></body></html> |