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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Class Poco::BasicBufferedBidirectionalStreamBuf</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta name="author" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="publisher" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="copyright" content="Copyright (c) 2009, Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="language" content="en"/>
<meta name="date" content="2009-11-24"/>
<meta name="generator" content="PocoDoc"/>
<link rel="stylesheet" href="css/styles.css" type="text/css"/>
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<body bgcolor="#ffffff" leftmargin="0" topmargin="0">
<div class="header">
<h1 class="namespace"><a href="Poco.html" class="namespace">Poco</a></h1>
<h1 class="template">template &lt; typename ch, typename tr, typename ba = BufferAllocator &lt; ch &gt; &gt;</h1>
<h1 class="symbol">class BasicBufferedBidirectionalStreamBuf</h1>
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<div class="body">
<p>
<b>Library:</b> Foundation<br />
<b>Package:</b> Streams<br />
<b>Header:</b> Poco/BufferedBidirectionalStreamBuf.h</p>
<h2>Description</h2>
<div class="description">
<p>This is an implementation of a buffered bidirectional  streambuf that greatly simplifies the implementation of custom streambufs of various kinds. Derived classes only have to override the methods <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3977" title="Poco::BasicBufferedBidirectionalStreamBuf::readFromDevice()">readFromDevice</a>() or <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3980" title="Poco::BasicBufferedBidirectionalStreamBuf::writeToDevice()">writeToDevice</a>(). </p>
<p>In contrast to BasicBufferedStreambuf, this class supports simultaneous read and write access, so in addition to istream and ostream this streambuf can also be used for implementing an iostream. </p>
</div>
<h2>Inheritance</h2>
<p><b>Direct Base Classes: </b>std::basic_streambuf&nbsp;&lt;&nbsp;ch,&nbsp;tr&nbsp;&gt;</p>
<p><b>All Base Classes: </b>std::basic_streambuf&nbsp;&lt;&nbsp;ch,&nbsp;tr&nbsp;&gt;</p>
<h2>Member Summary</h2>
<p><b>Member Functions: </b><a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3975" title="Poco::BasicBufferedBidirectionalStreamBuf::getMode()">getMode</a>, <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3969" title="Poco::BasicBufferedBidirectionalStreamBuf::overflow()">overflow</a>, <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3976" title="Poco::BasicBufferedBidirectionalStreamBuf::resetBuffers()">resetBuffers</a>, <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3973" title="Poco::BasicBufferedBidirectionalStreamBuf::setMode()">setMode</a>, <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3972" title="Poco::BasicBufferedBidirectionalStreamBuf::sync()">sync</a>, <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3971" title="Poco::BasicBufferedBidirectionalStreamBuf::underflow()">underflow</a></p>
<h2>Types</h2>
<h3><a name="3960">Allocator</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef ba <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3960" title="Poco::BasicBufferedBidirectionalStreamBuf::Allocator">Allocator</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3956">Base</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef std::basic_streambuf &lt; ch, tr &gt; <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3956" title="Poco::BasicBufferedBidirectionalStreamBuf::Base">Base</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3957">IOS</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef std::basic_ios &lt; ch, tr &gt; <a href="Poco.BasicBufferedBidirectionalStreamBuf.html#3957" title="Poco::BasicBufferedBidirectionalStreamBuf::IOS">IOS</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3959">char_traits</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef tr char_traits;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3958">char_type</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef ch char_type;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3961">int_type</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef typename Base::int_type int_type;</p>
<div class="description">
<p></p>
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<h3><a name="3963">off_type</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef typename Base::off_type off_type;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3964">openmode</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef typename IOS::openmode openmode;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3962">pos_type</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">typedef typename Base::pos_type pos_type;</p>
<div class="description">
<p></p>
</div>
<h2>Constructors</h2>
<h3><a name="3965">BasicBufferedBidirectionalStreamBuf</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.BasicBufferedBidirectionalStreamBuf.html" title="class Poco::BasicBufferedBidirectionalStreamBuf">BasicBufferedBidirectionalStreamBuf</a>(<br />&nbsp;&nbsp;&nbsp;&nbsp;std::streamsize bufferSize,<br />&nbsp;&nbsp;&nbsp;&nbsp;openmode mode<br />);</p>
<div class="description">
<p></p>
</div>
<h2>Destructor</h2>
<h3><a name="3968">~BasicBufferedBidirectionalStreamBuf</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">~<a href="Poco.BasicBufferedBidirectionalStreamBuf.html" title="class Poco::BasicBufferedBidirectionalStreamBuf">BasicBufferedBidirectionalStreamBuf</a>();</p>
<div class="description">
<p></p>
</div>
<h2>Member Functions</h2>
<h3><a name="3969">overflow</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" />  <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual int_type overflow(<br />&nbsp;&nbsp;&nbsp;&nbsp;int_type c<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="3972">sync</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" />  <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual int sync();</p>
<div class="description">
<p></p>
</div>
<h3><a name="3971">underflow</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" />  <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual int_type underflow();</p>
<div class="description">
<p></p>
</div>
<h3><a name="3975">getMode</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" />  <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">openmode getMode() const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="3976">resetBuffers</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" />  <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void resetBuffers();</p>
<div class="description">
<p></p>
</div>
<h3><a name="3973">setMode</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" />  <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void setMode(<br />&nbsp;&nbsp;&nbsp;&nbsp;openmode mode<br />);</p>
<div class="description">
<p></p>
</div>
<p class="footer">POCO C++ Libraries 1.3.6-all<br />
Copyright &copy; 2009, <a href="http://pocoproject.org/" target="_blank">Applied Informatics Software Engineering GmbH and Contributors</a></p>

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