240 lines
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240 lines
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<div class="sidebar-menu">☰</div>
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<p class='location'>Crate byteorder</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li><li><a href="#types">Type Definitions</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'byteorder', ty: 'mod', relpath: '../'};</script></div>
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</nav>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Crate <a class="mod" href=''>byteorder</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../src/byteorder/lib.rs.html#1-3250' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>This crate provides convenience methods for encoding and decoding numbers
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in either <a href="https://en.wikipedia.org/wiki/Endianness">big-endian or little-endian order</a>.</p>
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<p>The organization of the crate is pretty simple. A trait, <a href="trait.ByteOrder.html"><code>ByteOrder</code></a>, specifies
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byte conversion methods for each type of number in Rust (sans numbers that have
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a platform dependent size like <code>usize</code> and <code>isize</code>). Two types, <a href="enum.BigEndian.html"><code>BigEndian</code></a>
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and <a href="enum.LittleEndian.html"><code>LittleEndian</code></a> implement these methods. Finally, <a href="trait.ReadBytesExt.html"><code>ReadBytesExt</code></a> and
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<a href="trait.WriteBytesExt.html"><code>WriteBytesExt</code></a> provide convenience methods available to all types that
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implement <a href="https://doc.rust-lang.org/std/io/trait.Read.html"><code>Read</code></a> and <a href="https://doc.rust-lang.org/std/io/trait.Write.html"><code>Write</code></a>.</p>
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<p>An alias, <a href="type.NetworkEndian.html"><code>NetworkEndian</code></a>, for <a href="enum.BigEndian.html"><code>BigEndian</code></a> is provided to help improve
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code clarity.</p>
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<p>An additional alias, <a href="type.NativeEndian.html"><code>NativeEndian</code></a>, is provided for the endianness of the
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local platform. This is convenient when serializing data for use and
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conversions are not desired.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<p>Read unsigned 16 bit big-endian integers from a <a href="https://doc.rust-lang.org/std/io/trait.Read.html"><code>Read</code></a> type:</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">Cursor</span>;
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<span class="kw">use</span> <span class="ident">byteorder</span>::{<span class="ident">BigEndian</span>, <span class="ident">ReadBytesExt</span>};
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rdr</span> <span class="op">=</span> <span class="ident">Cursor</span>::<span class="ident">new</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">2</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">0</span>]);
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<span class="comment">// Note that we use type parameters to indicate which kind of byte order</span>
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<span class="comment">// we want!</span>
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">517</span>, <span class="ident">rdr</span>.<span class="ident">read_u16</span>::<span class="op"><</span><span class="ident">BigEndian</span><span class="op">></span>().<span class="ident">unwrap</span>());
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">768</span>, <span class="ident">rdr</span>.<span class="ident">read_u16</span>::<span class="op"><</span><span class="ident">BigEndian</span><span class="op">></span>().<span class="ident">unwrap</span>());</pre>
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<p>Write unsigned 16 bit little-endian integers to a <a href="https://doc.rust-lang.org/std/io/trait.Write.html"><code>Write</code></a> type:</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">byteorder</span>::{<span class="ident">LittleEndian</span>, <span class="ident">WriteBytesExt</span>};
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">wtr</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[];
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<span class="ident">wtr</span>.<span class="ident">write_u16</span>::<span class="op"><</span><span class="ident">LittleEndian</span><span class="op">></span>(<span class="number">517</span>).<span class="ident">unwrap</span>();
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<span class="ident">wtr</span>.<span class="ident">write_u16</span>::<span class="op"><</span><span class="ident">LittleEndian</span><span class="op">></span>(<span class="number">768</span>).<span class="ident">unwrap</span>();
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">wtr</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">5</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">3</span>]);</pre>
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<h1 id="optional-features" class="section-header"><a href="#optional-features">Optional Features</a></h1>
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<p>This crate optionally provides support for 128 bit values (<code>i128</code> and <code>u128</code>)
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when built with the <code>i128</code> feature enabled.</p>
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<p>This crate can also be used without the standard library.</p>
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</div><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="enum" href="enum.BigEndian.html"
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title='enum byteorder::BigEndian'>BigEndian</a></td>
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<td class='docblock-short'>
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<p>Defines big-endian serialization.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="enum" href="enum.LittleEndian.html"
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title='enum byteorder::LittleEndian'>LittleEndian</a></td>
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<td class='docblock-short'>
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<p>Defines little-endian serialization.</p>
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</td>
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</tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="trait" href="trait.ByteOrder.html"
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title='trait byteorder::ByteOrder'>ByteOrder</a></td>
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<td class='docblock-short'>
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<p><code>ByteOrder</code> describes types that can serialize integers as bytes.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="trait" href="trait.ReadBytesExt.html"
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title='trait byteorder::ReadBytesExt'>ReadBytesExt</a></td>
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<td class='docblock-short'>
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<p>Extends <a href="https://doc.rust-lang.org/std/io/trait.Read.html"><code>Read</code></a> with methods for reading numbers. (For <code>std::io</code>.)</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="trait" href="trait.WriteBytesExt.html"
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title='trait byteorder::WriteBytesExt'>WriteBytesExt</a></td>
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<td class='docblock-short'>
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<p>Extends <a href="https://doc.rust-lang.org/std/io/trait.Write.html"><code>Write</code></a> with methods for writing numbers. (For <code>std::io</code>.)</p>
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</td>
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</tr></table><h2 id='types' class='section-header'><a href="#types">Type Definitions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="type" href="type.BE.html"
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title='type byteorder::BE'>BE</a></td>
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<td class='docblock-short'>
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<p>A type alias for <a href="enum.BigEndian.html"><code>BigEndian</code></a>.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="type" href="type.LE.html"
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title='type byteorder::LE'>LE</a></td>
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<td class='docblock-short'>
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<p>A type alias for <a href="enum.LittleEndian.html"><code>LittleEndian</code></a>.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="type" href="type.NativeEndian.html"
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title='type byteorder::NativeEndian'>NativeEndian</a></td>
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<td class='docblock-short'>
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<p>Defines system native-endian serialization.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="type" href="type.NetworkEndian.html"
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title='type byteorder::NetworkEndian'>NetworkEndian</a></td>
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<td class='docblock-short'>
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<p>Defines network byte order serialization.</p>
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</td>
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