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<td >Qt 5.9</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-module.html">C++ Classes</a></td><td >QByteArrayMatcher</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QByteArrayMatcher Class</h1>
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<p>The <a href="qbytearraymatcher.html">QByteArrayMatcher</a> class holds a sequence of bytes that can be quickly matched in a byte array. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QByteArrayMatcher&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += core</td></tr></table></div><ul>
<li><a href="qbytearraymatcher-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#QByteArrayMatcher">QByteArrayMatcher</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#QByteArrayMatcher-1">QByteArrayMatcher</a></b>(const QByteArray &amp;<i>pattern</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#QByteArrayMatcher-2">QByteArrayMatcher</a></b>(const char *<i>pattern</i>, int <i>length</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#QByteArrayMatcher-3">QByteArrayMatcher</a></b>(const QByteArrayMatcher &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#dtor.QByteArrayMatcher">~QByteArrayMatcher</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#indexIn">indexIn</a></b>(const QByteArray &amp;<i>ba</i>, int <i>from</i> = 0) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#indexIn-1">indexIn</a></b>(const char *<i>str</i>, int <i>len</i>, int <i>from</i> = 0) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QByteArray </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#pattern">pattern</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#setPattern">setPattern</a></b>(const QByteArray &amp;<i>pattern</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QByteArrayMatcher &amp;</td><td class="memItemRight bottomAlign"><b><a href="qbytearraymatcher.html#operator-eq">operator=</a></b>(const QByteArrayMatcher &amp;<i>other</i>)</td></tr>
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<a name="details"></a>
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<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qbytearraymatcher.html">QByteArrayMatcher</a> class holds a sequence of bytes that can be quickly matched in a byte array.</p>
<p>This class is useful when you have a sequence of bytes that you want to repeatedly match against some byte arrays (perhaps in a loop), or when you want to search for the same sequence of bytes multiple times in the same byte array. Using a matcher object and <a href="qbytearraymatcher.html#indexIn">indexIn</a>() is faster than matching a plain <a href="qbytearray.html">QByteArray</a> with <a href="qbytearray.html#indexOf">QByteArray::indexOf</a>() if repeated matching takes place. This class offers no benefit if you are doing one-off byte array matches.</p>
<p>Create the <a href="qbytearraymatcher.html">QByteArrayMatcher</a> with the <a href="qbytearray.html">QByteArray</a> you want to search for. Then call <a href="qbytearraymatcher.html#indexIn">indexIn</a>() on the <a href="qbytearray.html">QByteArray</a> that you want to search.</p>
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<p><b>See also </b><a href="qbytearray.html">QByteArray</a> and <a href="qstringmatcher.html">QStringMatcher</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QByteArrayMatcher"><a name="QByteArrayMatcher"></a>QByteArrayMatcher::<span class="name">QByteArrayMatcher</span>()</h3>
<p>Constructs an empty byte array matcher that won't match anything. Call <a href="qbytearraymatcher.html#setPattern">setPattern</a>() to give it a pattern to match.</p>
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<h3 class="fn" id="QByteArrayMatcher-1"><a name="QByteArrayMatcher-1"></a>QByteArrayMatcher::<span class="name">QByteArrayMatcher</span>(const <span class="type"><a href="qbytearray.html">QByteArray</a></span> &amp;<i>pattern</i>)</h3>
<p>Constructs a byte array matcher that will search for <i>pattern</i>. Call <a href="qbytearraymatcher.html#indexIn">indexIn</a>() to perform a search.</p>
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<h3 class="fn" id="QByteArrayMatcher-2"><a name="QByteArrayMatcher-2"></a>QByteArrayMatcher::<span class="name">QByteArrayMatcher</span>(const <span class="type">char</span> *<i>pattern</i>, <span class="type">int</span> <i>length</i>)</h3>
<p>Constructs a byte array matcher from <i>pattern</i>. <i>pattern</i> has the given <i>length</i>. <i>pattern</i> must remain in scope, but the destructor does not delete <i>pattern</i>.</p>
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<h3 class="fn" id="QByteArrayMatcher-3"><a name="QByteArrayMatcher-3"></a>QByteArrayMatcher::<span class="name">QByteArrayMatcher</span>(const <span class="type"><a href="qbytearraymatcher.html#QByteArrayMatcher">QByteArrayMatcher</a></span> &amp;<i>other</i>)</h3>
<p>Copies the <i>other</i> byte array matcher to this byte array matcher.</p>
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<h3 class="fn" id="dtor.QByteArrayMatcher"><a name="dtor.QByteArrayMatcher"></a>QByteArrayMatcher::<span class="name">~QByteArrayMatcher</span>()</h3>
<p>Destroys the byte array matcher.</p>
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<h3 class="fn" id="indexIn"><a name="indexIn"></a><span class="type">int</span> QByteArrayMatcher::<span class="name">indexIn</span>(const <span class="type"><a href="qbytearray.html">QByteArray</a></span> &amp;<i>ba</i>, <span class="type">int</span> <i>from</i> = 0) const</h3>
<p>Searches the byte array <i>ba</i>, from byte position <i>from</i> (default 0, i.e&#x2e; from the first byte), for the byte array <a href="qbytearraymatcher.html#pattern">pattern</a>() that was set in the constructor or in the most recent call to <a href="qbytearraymatcher.html#setPattern">setPattern</a>(). Returns the position where the <a href="qbytearraymatcher.html#pattern">pattern</a>() matched in <i>ba</i>, or -1 if no match was found.</p>
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<h3 class="fn" id="indexIn-1"><a name="indexIn-1"></a><span class="type">int</span> QByteArrayMatcher::<span class="name">indexIn</span>(const <span class="type">char</span> *<i>str</i>, <span class="type">int</span> <i>len</i>, <span class="type">int</span> <i>from</i> = 0) const</h3>
<p>Searches the char string <i>str</i>, which has length <i>len</i>, from byte position <i>from</i> (default 0, i.e&#x2e; from the first byte), for the byte array <a href="qbytearraymatcher.html#pattern">pattern</a>() that was set in the constructor or in the most recent call to <a href="qbytearraymatcher.html#setPattern">setPattern</a>(). Returns the position where the <a href="qbytearraymatcher.html#pattern">pattern</a>() matched in <i>str</i>, or -1 if no match was found.</p>
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<h3 class="fn" id="pattern"><a name="pattern"></a><span class="type"><a href="qbytearray.html">QByteArray</a></span> QByteArrayMatcher::<span class="name">pattern</span>() const</h3>
<p>Returns the byte array pattern that this byte array matcher will search for.</p>
<p><b>See also </b><a href="qbytearraymatcher.html#setPattern">setPattern</a>().</p>
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<h3 class="fn" id="setPattern"><a name="setPattern"></a><span class="type">void</span> QByteArrayMatcher::<span class="name">setPattern</span>(const <span class="type"><a href="qbytearray.html">QByteArray</a></span> &amp;<i>pattern</i>)</h3>
<p>Sets the byte array that this byte array matcher will search for to <i>pattern</i>.</p>
<p><b>See also </b><a href="qbytearraymatcher.html#pattern">pattern</a>() and <a href="qbytearraymatcher.html#indexIn">indexIn</a>().</p>
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<h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qbytearraymatcher.html#QByteArrayMatcher">QByteArrayMatcher</a></span> &amp;QByteArrayMatcher::<span class="name">operator=</span>(const <span class="type"><a href="qbytearraymatcher.html#QByteArrayMatcher">QByteArrayMatcher</a></span> &amp;<i>other</i>)</h3>
<p>Assigns the <i>other</i> byte array matcher to this byte array matcher.</p>
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