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156 lines
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6.8 KiB
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<title>hamming - Rust</title>
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<section id='main' class="content mod">
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<h1 class='fqn'><span class='in-band'>Crate <a class='mod' href=''>hamming</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a id='src-0' class='srclink' href='../src/hamming/lib.rs.html#1-29' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>A crate to count ones and xor bytes, fast (aka popcount, hamming
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weight and hamming distance).</p>
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<h1 id='installation' class='section-header'><a href='#installation'>Installation</a></h1>
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<p>Add this to your <code>Cargo.toml</code>:</p>
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<pre><code class="language-toml">[dependencies]
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hamming = "0.1"
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</code></pre>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<pre class='rust rust-example-rendered'>
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<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>hamming</span>::<span class='ident'>weight</span>(<span class='kw-2'>&</span>[<span class='number'>1</span>, <span class='number'>0xFF</span>, <span class='number'>1</span>, <span class='number'>0xFF</span>]), <span class='number'>1</span> <span class='op'>+</span> <span class='number'>8</span> <span class='op'>+</span> <span class='number'>1</span> <span class='op'>+</span> <span class='number'>8</span>);
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<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>hamming</span>::<span class='ident'>distance</span>(<span class='kw-2'>&</span>[<span class='number'>1</span>, <span class='number'>0xFF</span>], <span class='kw-2'>&</span>[<span class='number'>0xFF</span>, <span class='number'>1</span>]), <span class='number'>7</span> <span class='op'>+</span> <span class='number'>7</span>);</pre>
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</div><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class='fn' href='fn.distance.html'
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title='hamming::distance'>distance</a></td>
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<td class='docblock short'>
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<p>Computes the bitwise <a href="https://en.wikipedia.org/wiki/Hamming_distance">Hamming
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distance</a> between
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<code>x</code> and <code>y</code>, that is, the number of bits where <code>x</code> and <code>y</code> differ,
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or, the number of set bits in the xor of <code>x</code> and <code>y</code>.</p>
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</tr>
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<tr class=' module-item'>
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<td><a class='fn' href='fn.distance_fast.html'
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title='hamming::distance_fast'>distance_fast</a></td>
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<td class='docblock short'>
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<p>Computes the bitwise <a href="https://en.wikipedia.org/wiki/Hamming_distance">Hamming
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distance</a> between
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<code>x</code> and <code>y</code>, that is, the number of bits where <code>x</code> and <code>y</code> differ,
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or, the number of set bits in the xor of <code>x</code> and <code>y</code>.</p>
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<td><a class='fn' href='fn.weight.html'
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title='hamming::weight'>weight</a></td>
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<td class='docblock short'>
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<p>Computes the <a href="https://en.wikipedia.org/wiki/Hamming_weight">Hamming
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weight</a> of <code>x</code>, that
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is, the population count, or number of ones.</p>
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