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<title>Go标准库中文文档</title>
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<a href='http://cngolib.com'><h1>Go 标准库中文文档</h1></a>
<p>cngolib.com · Go开发团队/著 · 黄健宏/译</p>
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<div class="section" id="hash">
<h1>hash<a class="headerlink" href="#hash" title="永久链接至标题">¶</a></h1>
<p>本文是 Go 标准库中 hash 包文档的翻译，
原文地址为：
<a class="reference external" href="https://golang.org/pkg/hash/">https://golang.org/pkg/hash/</a></p>
<div class="section" id="id1">
<h2>概述<a class="headerlink" href="#id1" title="永久链接至标题">¶</a></h2>
<p>hash 包提供了实现散列函数所需的接口。</p>
</div>
<div class="section" id="id2">
<h2>Hash 类型<a class="headerlink" href="#id2" title="永久链接至标题">¶</a></h2>
<p>Hash 是实现散列函数所需的公共接口。</p>
<div class="highlight-go"><div class="highlight"><pre><span class="kd">type</span> <span class="nx">Hash</span> <span class="kd">interface</span> <span class="p">{</span>
<span class="c1">// 通过 Write 方法将更多数据添加到正在运行的散列当中。</span>
<span class="c1">// 这个方法不会返回错误。</span>
<span class="c1">// Write 方法通过嵌入 io.Writer 接口来实现。</span>
<span class="nx">io</span><span class="p">.</span><span class="nx">Writer</span>
<span class="c1">// 将当前散列追加至 b 的末尾，并返回结果切片。</span>
<span class="c1">// 这一操作不会改变底层散列的状态。</span>
<span class="nx">Sum</span><span class="p">(</span><span class="nx">b</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">)</span> <span class="p">[]</span><span class="kt">byte</span>
<span class="c1">// 将散列重置至初始化状态。</span>
<span class="nx">Reset</span><span class="p">()</span>
<span class="c1">// 返回 Sum 会返回的字节数。</span>
<span class="nx">Size</span><span class="p">()</span> <span class="kt">int</span>
<span class="c1">// 返回散列的底层块大小。</span>
<span class="c1">// Write 必须能够接受任何大小的数据，</span>
<span class="c1">// 但如果写入的数据量总是块大小的某个倍数的话，</span>
<span class="c1">// 那么写入就会变得更为高效。</span>
<span class="nx">BlockSize</span><span class="p">()</span> <span class="kt">int</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="hash32">
<h2>Hash32 类型<a class="headerlink" href="#hash32" title="永久链接至标题">¶</a></h2>
<p>Hash32 是实现 32 位散列函数所需的公共接口。</p>
<div class="highlight-go"><div class="highlight"><pre><span class="kd">type</span> <span class="nx">Hash32</span> <span class="kd">interface</span> <span class="p">{</span>
<span class="nx">Hash</span>
<span class="nx">Sum32</span><span class="p">()</span> <span class="kt">uint32</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="hash64">
<h2>Hash64 类型<a class="headerlink" href="#hash64" title="永久链接至标题">¶</a></h2>
<p>Hash64 是实现 64 位散列函数所需的公共接口。</p>
<div class="highlight-go"><div class="highlight"><pre><span class="kd">type</span> <span class="nx">Hash64</span> <span class="kd">interface</span> <span class="p">{</span>
<span class="nx">Hash</span>
<span class="nx">Sum64</span><span class="p">()</span> <span class="kt">uint64</span>
<span class="p">}</span>
</pre></div>
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<li><a class="reference internal" href="#id1">概述</a></li>
<li><a class="reference internal" href="#id2">Hash 类型</a></li>
<li><a class="reference internal" href="#hash32">Hash32 类型</a></li>
<li><a class="reference internal" href="#hash64">Hash64 类型</a></li>
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