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GzipHeader Structure Reference
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<article class="main-content">
<section class="section">
<div class="section-content top-matter">
<h1>GzipHeader</h1>
<div class="declaration">
<div class="language">
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">GzipHeader</span></code></pre>
</div>
</div>
<p>Represents the header of a GZip archive.</p>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L10-L201">Show on GitHub</a>
</div>
</div>
</section>
<section class="section">
<div class="section-content">
<div class="task-group">
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV17compressionMethodAA011CompressionE0Ovp"></a>
<a name="//apple_ref/swift/Property/compressionMethod" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV17compressionMethodAA011CompressionE0Ovp">compressionMethod</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Compression method of archive. Always <code>.deflate</code> for GZip archives.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">compressionMethod</span><span class="p">:</span> <span class="kt"><a href="../Enums/CompressionMethod.html">CompressionMethod</a></span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L27">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV16modificationTime10Foundation4DateVSgvp"></a>
<a name="//apple_ref/swift/Property/modificationTime" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV16modificationTime10Foundation4DateVSgvp">modificationTime</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>The most recent modification time of the original file. If corresponding archive&rsquo;s field is set to 0, which means
that no time was specified, then this property is <code>nil</code>.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">modificationTime</span><span class="p">:</span> <span class="kt">Date</span><span class="p">?</span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L33">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV6osTypeAA010FileSystemE0Ovp"></a>
<a name="//apple_ref/swift/Property/osType" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV6osTypeAA010FileSystemE0Ovp">osType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Type of file system on which archivation took place.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">osType</span><span class="p">:</span> <span class="kt"><a href="../Enums/FileSystemType.html">FileSystemType</a></span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L36">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV8fileNameSSSgvp"></a>
<a name="//apple_ref/swift/Property/fileName" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV8fileNameSSSgvp">fileName</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Name of the original file. If archive doesn&rsquo;t contain file&rsquo;s name, then <code>nil</code>.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">fileName</span><span class="p">:</span> <span class="kt">String</span><span class="p">?</span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L39">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV7commentSSSgvp"></a>
<a name="//apple_ref/swift/Property/comment" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV7commentSSSgvp">comment</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Comment stored in archive. If archive doesn&rsquo;t contain any comment, then <code>nil</code>.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">comment</span><span class="p">:</span> <span class="kt">String</span><span class="p">?</span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L42">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV10isTextFileSbvp"></a>
<a name="//apple_ref/swift/Property/isTextFile" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV10isTextFileSbvp">isTextFile</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>True, if file is likely to be text file or ASCII-file.</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">isTextFile</span><span class="p">:</span> <span class="kt">Bool</span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L45">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV11extraFieldsSayAC10ExtraFieldVGvp"></a>
<a name="//apple_ref/swift/Property/extraFields" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV11extraFieldsSayAC10ExtraFieldVGvp">extraFields</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Extra fields present in the header.</p>
<div class="aside aside-note">
<p class="aside-title">Note</p>
This feature of the GZip format is extremely rarely used, so in vast majority of cases this property
contains an empty array.
</div>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">extraFields</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Structs/GzipHeader/ExtraField.html">ExtraField</a></span><span class="p">]</span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L53">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV7archiveAC10Foundation4DataV_tKcfc"></a>
<a name="//apple_ref/swift/Method/init(archive:)" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV7archiveAC10Foundation4DataV_tKcfc">init(archive:<wbr>)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Initializes the structure with the values from the first &lsquo;member&rsquo; of GZip <code>archive</code>.</p>
<div class="aside aside-throws">
<p class="aside-title">Throws</p>
<p><code><a href="../Enums/GzipError.html">GzipError</a></code>. It may indicate that either archive is damaged or
it might not be archived with GZip at all.</p>
</div>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="nf">init</span><span class="p">(</span><span class="n">archive</span> <span class="nv">data</span><span class="p">:</span> <span class="kt">Data</span><span class="p">)</span> <span class="k">throws</span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>archive</em>
</code>
</td>
<td>
<div>
<p>Data archived with GZip.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader.swift#L63-L66">Show on GitHub</a>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:13SWCompression10GzipHeaderV10ExtraFieldV"></a>
<a name="//apple_ref/swift/Struct/ExtraField" class="dashAnchor"></a>
<a class="token" href="#/s:13SWCompression10GzipHeaderV10ExtraFieldV">ExtraField</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents an extra field in the header of a GZip archive.</p>
<a href="../Structs/GzipHeader/ExtraField.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">ExtraField</span></code></pre>
</div>
</div>
<div class="slightly-smaller">
<a href="https://github.com/tsolomko/SWCompression/tree/4.9.1/Sources/GZip/GzipHeader+ExtraField.swift#L9-L27">Show on GitHub</a>
</div>
</section>
</div>
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