mirror of
https://github.com/edg-l/edlang.git
synced 2024-11-10 01:58:23 +00:00
37 lines
6.7 KiB
HTML
37 lines
6.7 KiB
HTML
<!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="Read and write DWARF’s “Little Endian Base 128” (LEB128) variable length integer encoding."><title>gimli::leb128 - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="gimli" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../gimli/index.html">gimli</a><span class="version">0.28.1</span></h2></div><h2 class="location"><a href="#">Module leb128</a></h2><div class="sidebar-elems"><section><ul class="block"><li><a href="#modules">Modules</a></li></ul></section><h2><a href="../index.html">In crate gimli</a></h2></div></nav><div class="sidebar-resizer"></div>
|
||
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../gimli/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Module <a href="../index.html">gimli</a>::<wbr><a class="mod" href="#">leb128</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/gimli/leb128.rs.html#1-612">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Read and write DWARF’s “Little Endian Base 128” (LEB128) variable length
|
||
integer encoding.</p>
|
||
<p>The implementation is a direct translation of the psuedocode in the DWARF 4
|
||
standard’s appendix C.</p>
|
||
<p>Read and write signed integers:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>gimli::{EndianSlice, NativeEndian, leb128};
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0</span>; <span class="number">1024</span>];
|
||
|
||
<span class="comment">// Write to anything that implements `std::io::Write`.
|
||
</span>{
|
||
<span class="kw">let </span><span class="kw-2">mut </span>writable = <span class="kw-2">&mut </span>buf[..];
|
||
leb128::write::signed(<span class="kw-2">&mut </span>writable, -<span class="number">12345</span>).expect(<span class="string">"Should write number"</span>);
|
||
}
|
||
|
||
<span class="comment">// Read from anything that implements `gimli::Reader`.
|
||
</span><span class="kw">let </span><span class="kw-2">mut </span>readable = EndianSlice::new(<span class="kw-2">&</span>buf[..], NativeEndian);
|
||
<span class="kw">let </span>val = leb128::read::signed(<span class="kw-2">&mut </span>readable).expect(<span class="string">"Should read number"</span>);
|
||
<span class="macro">assert_eq!</span>(val, -<span class="number">12345</span>);</code></pre></div>
|
||
<p>Or read and write unsigned integers:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>gimli::{EndianSlice, NativeEndian, leb128};
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0</span>; <span class="number">1024</span>];
|
||
|
||
{
|
||
<span class="kw">let </span><span class="kw-2">mut </span>writable = <span class="kw-2">&mut </span>buf[..];
|
||
leb128::write::unsigned(<span class="kw-2">&mut </span>writable, <span class="number">98765</span>).expect(<span class="string">"Should write number"</span>);
|
||
}
|
||
|
||
<span class="kw">let </span><span class="kw-2">mut </span>readable = EndianSlice::new(<span class="kw-2">&</span>buf[..], NativeEndian);
|
||
<span class="kw">let </span>val = leb128::read::unsigned(<span class="kw-2">&mut </span>readable).expect(<span class="string">"Should read number"</span>);
|
||
<span class="macro">assert_eq!</span>(val, <span class="number">98765</span>);</code></pre></div>
|
||
</div></details><h2 id="modules" class="section-header"><a href="#modules">Modules</a></h2><ul class="item-table"><li><div class="item-name"><a class="mod" href="read/index.html" title="mod gimli::leb128::read">read</a></div><div class="desc docblock-short">A module for reading signed and unsigned integers that have been LEB128
|
||
encoded.</div></li></ul></section></div></main></body></html> |