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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="API documentation for the Rust `impls` mod in crate `rand_core`."><meta name="keywords" content="rust, rustlang, rust-lang, impls"><title>rand_core::impls - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../rand_core/index.html'><div class='logo-container'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png' alt='logo'></div></a><p class='location'>Module impls</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#functions">Functions</a></li></ul></div><p class='location'><a href='../index.html'>rand_core</a></p><script>window.sidebarCurrent = {name: 'impls', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/rand_core/lib.rs.html#58' title='goto source code'>[src]</a></span><span class='in-band'>Module <a href='../index.html'>rand_core</a>::<wbr><a class="mod" href=''>impls</a></span></h1><div class='docblock'><p>Helper functions for implementing <code>RngCore</code> functions.</p>
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<p>For cross-platform reproducibility, these functions all use Little Endian:
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least-significant part first. For example, <code>next_u64_via_u32</code> takes <code>u32</code>
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values <code>x, y</code>, then outputs <code>(y << 32) | x</code>. To implement <code>next_u32</code>
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from <code>next_u64</code> in little-endian order, one should use <code>next_u64() as u32</code>.</p>
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<p>Byte-swapping (like the std <code>to_le</code> functions) is only needed to convert
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to/from byte sequences, and since its purpose is reproducibility,
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non-reproducible sources (e.g. <code>OsRng</code>) need not bother with it.</p>
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</div><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table><tr class='module-item'><td><a class="fn" href="fn.fill_bytes_via_next.html" title='rand_core::impls::fill_bytes_via_next fn'>fill_bytes_via_next</a></td><td class='docblock-short'><p>Implement <code>fill_bytes</code> via <code>next_u64</code> and <code>next_u32</code>, little-endian order.</p>
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</td></tr><tr class='module-item'><td><a class="fn" href="fn.fill_via_u32_chunks.html" title='rand_core::impls::fill_via_u32_chunks fn'>fill_via_u32_chunks</a></td><td class='docblock-short'><p>Implement <code>fill_bytes</code> by reading chunks from the output buffer of a block
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based RNG.</p>
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</td></tr><tr class='module-item'><td><a class="fn" href="fn.fill_via_u64_chunks.html" title='rand_core::impls::fill_via_u64_chunks fn'>fill_via_u64_chunks</a></td><td class='docblock-short'><p>Implement <code>fill_bytes</code> by reading chunks from the output buffer of a block
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based RNG.</p>
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</td></tr><tr class='module-item'><td><a class="fn" href="fn.next_u32_via_fill.html" title='rand_core::impls::next_u32_via_fill fn'>next_u32_via_fill</a></td><td class='docblock-short'><p>Implement <code>next_u32</code> via <code>fill_bytes</code>, little-endian order.</p>
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</td></tr><tr class='module-item'><td><a class="fn" href="fn.next_u64_via_fill.html" title='rand_core::impls::next_u64_via_fill fn'>next_u64_via_fill</a></td><td class='docblock-short'><p>Implement <code>next_u64</code> via <code>fill_bytes</code>, little-endian order.</p>
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</td></tr><tr class='module-item'><td><a class="fn" href="fn.next_u64_via_u32.html" title='rand_core::impls::next_u64_via_u32 fn'>next_u64_via_u32</a></td><td class='docblock-short'><p>Implement <code>next_u64</code> via <code>next_u32</code>, little-endian order.</p>
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</td></tr></table></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g., <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g., <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g., <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../";window.currentCrate = "rand_core";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script defer src="../../search-index.js"></script></body></html> |
