<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html><head><title>QByteArrayMatcher Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
td.postheader { font-family: sans-serif }
tr.address { font-family: sans-serif }
body { background: #ffffff; color: black; }
</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="../pyqt4ref.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QByteArrayMatcher Class Reference<br /><sup><sup>[<a href="qtcore.html">QtCore</a> module]</sup></sup></h1><p>The QByteArrayMatcher class holds a sequence of bytes that can
be quickly matched in a byte array. <a href="#details">More...</a></p>
<h3>Methods</h3><ul><li><div class="fn" /><b><a href="qbytearraymatcher.html#QByteArrayMatcher">__init__</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qbytearraymatcher.html#QByteArrayMatcher-2">__init__</a></b> (<i>self</i>, QByteArray <i>pattern</i>)</li><li><div class="fn" /><b><a href="qbytearraymatcher.html#QByteArrayMatcher-3">__init__</a></b> (<i>self</i>, QByteArrayMatcher <i>other</i>)</li><li><div class="fn" />int <b><a href="qbytearraymatcher.html#indexIn">indexIn</a></b> (<i>self</i>, QByteArray <i>ba</i>, int <i>from</i> = 0)</li><li><div class="fn" />QByteArray <b><a href="qbytearraymatcher.html#pattern">pattern</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qbytearraymatcher.html#setPattern">setPattern</a></b> (<i>self</i>, QByteArray <i>pattern</i>)</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QByteArrayMatcher 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 QByteArrayMatcher 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>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QByteArrayMatcher" />QByteArrayMatcher.__init__ (<i>self</i>)</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>
<h3 class="fn"><a name="QByteArrayMatcher-2" />QByteArrayMatcher.__init__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <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>
<h3 class="fn"><a name="QByteArrayMatcher-3" />QByteArrayMatcher.__init__ (<i>self</i>, <a href="qbytearraymatcher.html">QByteArrayMatcher</a> <i>other</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>
<h3 class="fn"><a name="indexIn" />int QByteArrayMatcher.indexIn (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>ba</i>, int <i>from</i> = 0)</h3><p>Searches the byte array <i>ba</i>, from byte position
<i>from</i> (default 0, i.e. 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>
<h3 class="fn"><a name="pattern" /><a href="qbytearray.html">QByteArray</a> QByteArrayMatcher.pattern (<i>self</i>)</h3><p>Returns the byte array pattern that this byte array matcher will
search for.</p>
<p>See also <a href="qbytearraymatcher.html#setPattern">setPattern</a>().</p>
<h3 class="fn"><a name="setPattern" />QByteArrayMatcher.setPattern (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>pattern</i>)</h3><p>Sets the byte array that this byte array matcher will search for
to <i>pattern</i>.</p>
<p>See also <a href="qbytearraymatcher.html#pattern">pattern</a>()
and <a href="qbytearraymatcher.html#indexIn">indexIn</a>().</p>
<address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt 4.8.3 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.qtsoftware.com">Nokia</a> 2011</td><td align="right" width="25%">Qt 4.7.1</td></tr></table></div></address></body></html>
