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<div class="title">QuaChecksum32 Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div>
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<p>Checksum interface.
<a href="classQuaChecksum32.html#details">More...</a></p>
<p><code>#include <<a class="el" href="quachecksum32_8h_source.html">quazip/quachecksum32.h</a>></code></p>
<div id="dynsection-0" onclick="return toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;">
<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for QuaChecksum32:</div>
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<area href="classQuaAdler32.html" title="Adler32 checksum. " alt="QuaAdler32" shape="rect" coords="0,56,108,80"/>
<area href="classQuaCrc32.html" title="CRC32 checksum. " alt="QuaCrc32" shape="rect" coords="118,56,226,80"/>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a14d800fcfd55b2ae11ef07d3924fe0b1"><td class="memItemLeft" align="right" valign="top">virtual quint32 </td><td class="memItemRight" valign="bottom"><a class="el" href="classQuaChecksum32.html#a14d800fcfd55b2ae11ef07d3924fe0b1">calculate</a> (const QByteArray &data)=0</td></tr>
<tr class="memdesc:a14d800fcfd55b2ae11ef07d3924fe0b1"><td class="mdescLeft"> </td><td class="mdescRight">Calculates the checksum for data. <a href="#a14d800fcfd55b2ae11ef07d3924fe0b1">More...</a><br /></td></tr>
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<tr class="memitem:ad3f5db3c76b00069db9bda333cb49d57"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad3f5db3c76b00069db9bda333cb49d57"></a>
virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQuaChecksum32.html#ad3f5db3c76b00069db9bda333cb49d57">reset</a> ()=0</td></tr>
<tr class="memdesc:ad3f5db3c76b00069db9bda333cb49d57"><td class="mdescLeft"> </td><td class="mdescRight">Resets the calculation on a checksun for a stream. <br /></td></tr>
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<tr class="memitem:a63a6ed3171f9243214d307da67557f7e"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQuaChecksum32.html#a63a6ed3171f9243214d307da67557f7e">update</a> (const QByteArray &buf)=0</td></tr>
<tr class="memdesc:a63a6ed3171f9243214d307da67557f7e"><td class="mdescLeft"> </td><td class="mdescRight">Updates the calculated checksum for the stream. <a href="#a63a6ed3171f9243214d307da67557f7e">More...</a><br /></td></tr>
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<tr class="memitem:afd836e7534194fce08356be6a8336da7"><td class="memItemLeft" align="right" valign="top">virtual quint32 </td><td class="memItemRight" valign="bottom"><a class="el" href="classQuaChecksum32.html#afd836e7534194fce08356be6a8336da7">value</a> ()=0</td></tr>
<tr class="memdesc:afd836e7534194fce08356be6a8336da7"><td class="mdescLeft"> </td><td class="mdescRight">Value of the checksum calculated for the stream passed throw <a class="el" href="classQuaChecksum32.html#a63a6ed3171f9243214d307da67557f7e" title="Updates the calculated checksum for the stream. ">update()</a>. <a href="#afd836e7534194fce08356be6a8336da7">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Checksum interface. </p>
<p>This is an interface for 32 bit checksums. Classes implementing this interface can calcunate a certin checksum in a single step: </p><div class="fragment"><div class="line">QChecksum32 *crc32 = <span class="keyword">new</span> <a class="code" href="classQuaCrc32.html">QuaCrc32</a>(); </div><div class="line">rasoult = crc32->calculate(data);</div></div><!-- fragment --><p> or by streaming the data: </p><div class="fragment"><div class="line">QChecksum32 *crc32 = <span class="keyword">new</span> <a class="code" href="classQuaCrc32.html">QuaCrc32</a>(); </div><div class="line"><span class="keywordflow">while</span>(!fileA.atEnd())</div><div class="line"> crc32->update(fileA.read(bufSize));</div><div class="line">resoultA = crc32->value();</div><div class="line">crc32->reset();</div><div class="line"><span class="keywordflow">while</span>(!fileB.atEnd())</div><div class="line"> crc32->update(fileB.read(bufSize));</div><div class="line">resoultB = crc32->value();</div></div><!-- fragment --> </div><h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">virtual quint32 QuaChecksum32::calculate </td>
<td>(</td>
<td class="paramtype">const QByteArray & </td>
<td class="paramname"><em>data</em></td><td>)</td>
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<p>Calculates the checksum for data. </p>
<p><em>data</em> source data </p><dl class="section return"><dt>Returns</dt><dd>data checksum</dd></dl>
<p>This function has no efect on the value returned by <a class="el" href="classQuaChecksum32.html#afd836e7534194fce08356be6a8336da7" title="Value of the checksum calculated for the stream passed throw update(). ">value()</a>. </p>
<p>Implemented in <a class="el" href="classQuaAdler32.html#a350e84fd000ebfa3c33503336a7b21bb">QuaAdler32</a>, and <a class="el" href="classQuaCrc32.html#aaf6fdf6e36e55c97bf9eab6ec65ecb9e">QuaCrc32</a>.</p>
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<td class="memname">virtual void QuaChecksum32::update </td>
<td>(</td>
<td class="paramtype">const QByteArray & </td>
<td class="paramname"><em>buf</em></td><td>)</td>
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<p>Updates the calculated checksum for the stream. </p>
<p><em>buf</em> next portion of data from the stream </p>
<p>Implemented in <a class="el" href="classQuaAdler32.html#aba24f7b16aa0cdc26f81a9ad687fc653">QuaAdler32</a>, and <a class="el" href="classQuaCrc32.html#a5015d80e04afe6e6d094155b7e99888e">QuaCrc32</a>.</p>
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<td class="memname">virtual quint32 QuaChecksum32::value </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>Value of the checksum calculated for the stream passed throw <a class="el" href="classQuaChecksum32.html#a63a6ed3171f9243214d307da67557f7e" title="Updates the calculated checksum for the stream. ">update()</a>. </p>
<dl class="section return"><dt>Returns</dt><dd>checksum </dd></dl>
<p>Implemented in <a class="el" href="classQuaAdler32.html#a2022e1db95c23cef220b335e44d74fb1">QuaAdler32</a>, and <a class="el" href="classQuaCrc32.html#a957ce46a53862f75c89d6a3ac4f73389">QuaCrc32</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>src/utilities/quazip/<a class="el" href="quachecksum32_8h_source.html">quachecksum32.h</a></li>
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