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| 5 | <title>QuaZIP: QuaChecksum32 Class Reference</title>
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| 17 | <div id="projectname">QuaZIP <span id="projectnumber">quazip-0-7-2</span></div>
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| 34 | <li><a href="annotated.html"><span>Class List</span></a></li>
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| 35 | <li><a href="inherits.html"><span>Class Hierarchy</span></a></li>
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| 37 | </ul>
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| 39 | </div>
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| 40 | <div class="header">
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| 41 | <div class="summary">
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| 42 | <a href="#pub-methods">Public Member Functions</a> </div>
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| 43 | <div class="headertitle">
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| 44 | <div class="title">QuaChecksum32 Class Reference</div> </div>
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| 45 | </div>
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| 46 | <div class="contents">
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| 47 | <!-- doxytag: class="QuaChecksum32" -->
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| 48 | <p>Checksum interface.
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| 49 | <a href="classQuaChecksum32.html#details">More...</a></p>
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| 50 |
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| 51 | <p><code>#include <<a class="el" href="quachecksum32_8h_source.html">quazip/quachecksum32.h</a>></code></p>
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| 52 | <div class="dynheader">
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| 53 | Inheritance diagram for QuaChecksum32:</div>
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| 54 | <div class="dyncontent">
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| 55 | <div class="center"><img src="classQuaChecksum32__inherit__graph.png" border="0" usemap="#QuaChecksum32_inherit__map" alt="Inheritance graph"/></div>
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| 56 | <map name="QuaChecksum32_inherit__map" id="QuaChecksum32_inherit__map">
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| 57 | <area shape="rect" id="node3" href="classQuaAdler32.html" title="Adler32 checksum." alt="" coords="5,80,96,107"/>
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| 58 | <area shape="rect" id="node5" href="classQuaCrc32.html" title="CRC32 checksum." alt="" coords="120,80,200,107"/>
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| 59 | </map>
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| 60 | <center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
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| 61 |
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| 62 | <p><a href="classQuaChecksum32-members.html">List of all members.</a></p>
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| 63 | <table class="memberdecls">
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| 64 | <tr><td colspan="2"><h2><a name="pub-methods"></a>
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| 65 | Public Member Functions</h2></td></tr>
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| 66 | <tr><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 <a class="elRef" doxygen="qtcore.tags:http://doc.qt.io/qt-5//" href="http://doc.qt.io/qt-5/qbytearray.html">QByteArray</a> &data)=0</td></tr>
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| 67 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Calculates the checksum for data. <a href="#a14d800fcfd55b2ae11ef07d3924fe0b1"></a><br/></td></tr>
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| 68 | <tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad3f5db3c76b00069db9bda333cb49d57"></a><!-- doxytag: member="QuaChecksum32::reset" ref="ad3f5db3c76b00069db9bda333cb49d57" args="()=0" -->
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| 69 | virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQuaChecksum32.html#ad3f5db3c76b00069db9bda333cb49d57">reset</a> ()=0</td></tr>
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| 70 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Resets the calculation on a checksun for a stream. <br/></td></tr>
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| 71 | <tr><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 <a class="elRef" doxygen="qtcore.tags:http://doc.qt.io/qt-5//" href="http://doc.qt.io/qt-5/qbytearray.html">QByteArray</a> &buf)=0</td></tr>
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| 72 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Updates the calculated checksum for the stream. <a href="#a63a6ed3171f9243214d307da67557f7e"></a><br/></td></tr>
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| 73 | <tr><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>
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| 74 | <tr><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"></a><br/></td></tr>
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| 75 | </table>
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| 76 | <hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
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| 77 | <div class="textblock"><p>Checksum interface. </p>
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| 78 | <p>This is an interface for 32 bit checksums. Classes implementing this interface can calcunate a certin checksum in a single step: </p>
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| 79 | <div class="fragment"><pre class="fragment"> QChecksum32 *crc32 = <span class="keyword">new</span> <a class="code" href="classQuaCrc32.html" title="CRC32 checksum.">QuaCrc32</a>();
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| 80 | rasoult = crc32->calculate(data);
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| 81 | </pre></div><p> or by streaming the data: </p>
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| 82 | <div class="fragment"><pre class="fragment"> QChecksum32 *crc32 = <span class="keyword">new</span> <a class="code" href="classQuaCrc32.html" title="CRC32 checksum.">QuaCrc32</a>();
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| 83 | <span class="keywordflow">while</span>(!fileA.atEnd())
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| 84 | crc32->update(fileA.read(bufSize));
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| 85 | resoultA = crc32->value();
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| 86 | crc32->reset();
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| 87 | <span class="keywordflow">while</span>(!fileB.atEnd())
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| 88 | crc32->update(fileB.read(bufSize));
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| 89 | resoultB = crc32->value();
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| 90 | </pre></div> </div><hr/><h2>Member Function Documentation</h2>
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| 91 | <a class="anchor" id="a14d800fcfd55b2ae11ef07d3924fe0b1"></a><!-- doxytag: member="QuaChecksum32::calculate" ref="a14d800fcfd55b2ae11ef07d3924fe0b1" args="(const QByteArray &data)=0" -->
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| 92 | <div class="memitem">
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| 93 | <div class="memproto">
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| 94 | <table class="memname">
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| 95 | <tr>
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| 96 | <td class="memname">virtual quint32 QuaChecksum32::calculate </td>
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| 97 | <td>(</td>
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| 98 | <td class="paramtype">const <a class="elRef" doxygen="qtcore.tags:http://doc.qt.io/qt-5//" href="http://doc.qt.io/qt-5/qbytearray.html">QByteArray</a> & </td>
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| 99 | <td class="paramname"><em>data</em></td><td>)</td>
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| 100 | <td><code> [pure virtual]</code></td>
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| 101 | </tr>
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| 102 | </table>
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| 103 | </div>
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| 104 | <div class="memdoc">
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| 105 |
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| 106 | <p>Calculates the checksum for data. </p>
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| 107 | <p><em>data</em> source data </p>
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| 108 | <dl class="return"><dt><b>Returns:</b></dt><dd>data checksum</dd></dl>
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| 109 | <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>
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| 110 |
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| 111 | <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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| 112 |
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| 113 | </div>
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| 114 | </div>
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| 115 | <a class="anchor" id="a63a6ed3171f9243214d307da67557f7e"></a><!-- doxytag: member="QuaChecksum32::update" ref="a63a6ed3171f9243214d307da67557f7e" args="(const QByteArray &buf)=0" -->
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| 116 | <div class="memitem">
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| 117 | <div class="memproto">
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| 118 | <table class="memname">
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| 119 | <tr>
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| 120 | <td class="memname">virtual void QuaChecksum32::update </td>
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| 121 | <td>(</td>
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| 122 | <td class="paramtype">const <a class="elRef" doxygen="qtcore.tags:http://doc.qt.io/qt-5//" href="http://doc.qt.io/qt-5/qbytearray.html">QByteArray</a> & </td>
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| 123 | <td class="paramname"><em>buf</em></td><td>)</td>
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| 124 | <td><code> [pure virtual]</code></td>
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| 125 | </tr>
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| 126 | </table>
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| 127 | </div>
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| 128 | <div class="memdoc">
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| 129 |
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| 130 | <p>Updates the calculated checksum for the stream. </p>
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| 131 | <p><em>buf</em> next portion of data from the stream </p>
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| 132 |
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| 133 | <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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| 134 |
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| 135 | </div>
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| 136 | </div>
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| 137 | <a class="anchor" id="afd836e7534194fce08356be6a8336da7"></a><!-- doxytag: member="QuaChecksum32::value" ref="afd836e7534194fce08356be6a8336da7" args="()=0" -->
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| 138 | <div class="memitem">
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| 139 | <div class="memproto">
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| 140 | <table class="memname">
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| 141 | <tr>
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| 142 | <td class="memname">virtual quint32 QuaChecksum32::value </td>
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| 143 | <td>(</td>
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| 144 | <td class="paramname"></td><td>)</td>
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| 145 | <td><code> [pure virtual]</code></td>
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| 146 | </tr>
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| 147 | </table>
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| 148 | </div>
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| 149 | <div class="memdoc">
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| 150 |
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| 151 | <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>
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| 152 | <dl class="return"><dt><b>Returns:</b></dt><dd>checksum </dd></dl>
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| 153 |
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| 154 | <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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| 155 |
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| 156 | </div>
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| 157 | </div>
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| 158 | <hr/>The documentation for this class was generated from the following file:<ul>
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| 159 | <li>quazip/<a class="el" href="quachecksum32_8h_source.html">quachecksum32.h</a></li>
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| 160 | </ul>
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| 161 | </div>
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| 162 | <hr class="footer"/><address class="footer"><small>Generated on Sun Apr 3 2016 08:26:25 for QuaZIP by 
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| 163 | <a href="http://www.doxygen.org/index.html">
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| 164 | <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </small></address>
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| 165 | </body>
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| 166 | </html>
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