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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-11-08 12:31:36 -0600 |
|---|---|---|
| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-11-08 12:31:36 -0600 |
| commit | d796c9dd933ab96ec83b9a634feedd5d32e1ba3f (patch) | |
| tree | 6e3dcca4f77e20ec8966c666aac7c35bd4704053 /doc/html/qbuffer.html | |
| download | tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.tar.gz tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.zip | |
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
Diffstat (limited to 'doc/html/qbuffer.html')
| -rw-r--r-- | doc/html/qbuffer.html | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/doc/html/qbuffer.html b/doc/html/qbuffer.html new file mode 100644 index 000000000..3685fee23 --- /dev/null +++ b/doc/html/qbuffer.html @@ -0,0 +1,148 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/tools/qbuffer.cpp:41 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>TQBuffer Class</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQBuffer Class Reference</h1> + +<p>The TQBuffer class is an I/O device that operates on a TQByteArray. +<a href="#details">More...</a> +<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when TQt is built with thread support.</p> +<p><tt>#include <<a href="qbuffer-h.html">qbuffer.h</a>></tt> +<p>Inherits <a href="qiodevice.html">TQIODevice</a>. +<p><a href="qbuffer-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#TQBuffer"><b>TQBuffer</b></a> ()</li> +<li class=fn><a href="#TQBuffer-2"><b>TQBuffer</b></a> ( TQByteArray buf )</li> +<li class=fn><a href="#~TQBuffer"><b>~TQBuffer</b></a> ()</li> +<li class=fn>TQByteArray <a href="#buffer"><b>buffer</b></a> () const</li> +<li class=fn>bool <a href="#setBuffer"><b>setBuffer</b></a> ( TQByteArray buf )</li> +<li class=fn>virtual Q_LONG <a href="#writeBlock"><b>writeBlock</b></a> ( const char * p, Q_ULONG len )</li> +<li class=fn>Q_LONG <a href="#writeBlock-2"><b>writeBlock</b></a> ( const TQByteArray & data )</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + + +The TQBuffer class is an I/O device that operates on a <a href="qbytearray.html">TQByteArray</a>. +<p> + +<p> TQBuffer is used to read and write to a memory buffer. It is +normally used with a <a href="qtextstream.html">TQTextStream</a> or a <a href="qdatastream.html">TQDataStream</a>. TQBuffer has an +associated TQByteArray which holds the buffer data. The <a href="qiodevice.html#size">size</a>() of +the buffer is automatically adjusted as data is written. +<p> The constructor <tt>TQBuffer(TQByteArray)</tt> creates a TQBuffer using an +existing byte array. The byte array can also be set with +<a href="#setBuffer">setBuffer</a>(). Writing to the TQBuffer will modify the original byte +array because TQByteArray is <a href="shclass.html">explicitly + shared.</a> +<p> Use <a href="qiodevice.html#open">open</a>() to open the buffer before use and to set the mode +(read-only, write-only, etc.). <a href="qiodevice.html#close">close</a>() closes the buffer. The +buffer must be closed before reopening or calling setBuffer(). +<p> A common way to use TQBuffer is through <a href="qdatastream.html">TQDataStream</a> or <a href="qtextstream.html">TQTextStream</a>, which have constructors that take a TQBuffer +parameter. For convenience, there are also TQDataStream and +<a href="qtextstream.html">TQTextStream</a> constructors that take a <a href="qbytearray.html">TQByteArray</a> parameter. These +constructors create and open an internal TQBuffer. +<p> Note that TQTextStream can also operate on a <a href="qstring.html">TQString</a> (a Unicode +string); a TQBuffer cannot. +<p> You can also use TQBuffer directly through the standard <a href="qiodevice.html">TQIODevice</a> +functions <a href="qiodevice.html#readBlock">readBlock</a>(), <a href="#writeBlock">writeBlock</a>() <a href="qiodevice.html#readLine">readLine</a>(), <a href="qiodevice.html#at">at</a>(), <a href="qiodevice.html#getch">getch</a>(), +<a href="qiodevice.html#putch">putch</a>() and <a href="qiodevice.html#ungetch">ungetch</a>(). +<p> <p>See also <a href="qfile.html">TQFile</a>, <a href="qdatastream.html">TQDataStream</a>, <a href="qtextstream.html">TQTextStream</a>, <a href="qbytearray.html">TQByteArray</a>, <a href="shclass.html">Shared Classes</a>, <a href="collection.html">Collection Classes</a>, and <a href="io.html">Input/Output and Networking</a>. + +<hr><h2>Member Function Documentation</h2> +<h3 class=fn><a name="TQBuffer"></a>TQBuffer::TQBuffer () +</h3> +Constructs an empty buffer. + +<h3 class=fn><a name="TQBuffer-2"></a>TQBuffer::TQBuffer ( <a href="qbytearray.html">TQByteArray</a> buf ) +</h3> +Constructs a buffer that operates on <em>buf</em>. +<p> If you open the buffer in write mode (<a href="qfile.html#open"><a href="qfile.html#open">IO_WriteOnly</a></a> or +<a href="qfile.html#open">IO_ReadWrite</a>) and write something into the buffer, <em>buf</em> +will be modified. +<p> Example: +<pre> + <a href="qcstring.html">TQCString</a> str = "abc"; + TQBuffer b( str ); + b.<a href="qiodevice.html#open">open</a>( IO_WriteOnly ); + b.<a href="qiodevice.html#at">at</a>( 3 ); // position at the 4th character (the terminating \0) + b.<a href="#writeBlock">writeBlock</a>( "def", 4 ); // write "def" including the terminating \0 + b.<a href="qiodevice.html#close">close</a>(); + // Now, str == "abcdef" with a terminating \0 + </pre> + +<p> <p>See also <a href="#setBuffer">setBuffer</a>(). + +<h3 class=fn><a name="~TQBuffer"></a>TQBuffer::~TQBuffer () +</h3> +Destroys the buffer. + +<h3 class=fn><a href="qbytearray.html">TQByteArray</a> <a name="buffer"></a>TQBuffer::buffer () const +</h3> + +<p> Returns this buffer's byte array. +<p> <p>See also <a href="#setBuffer">setBuffer</a>(). + +<h3 class=fn>bool <a name="setBuffer"></a>TQBuffer::setBuffer ( <a href="qbytearray.html">TQByteArray</a> buf ) +</h3> +Replaces the buffer's contents with <em>buf</em> and returns TRUE. +<p> Does nothing (and returns FALSE) if <a href="qiodevice.html#isOpen">isOpen</a>() is TRUE. +<p> Note that if you open the buffer in write mode (<a href="qfile.html#open"><a href="qfile.html#open">IO_WriteOnly</a></a> or +<a href="qfile.html#open">IO_ReadWrite</a>) and write something into the buffer, <em>buf</em> is also +modified because <a href="qbytearray.html">TQByteArray</a> is an <a href="shclass.html#explicitly-shared">explicitly shared</a> class. +<p> <p>See also <a href="#buffer">buffer</a>(), <a href="qiodevice.html#open">open</a>(), and <a href="qiodevice.html#close">close</a>(). + +<h3 class=fn>Q_LONG <a name="writeBlock"></a>TQBuffer::writeBlock ( const char * p, Q_ULONG len )<tt> [virtual]</tt> +</h3> +Writes <em>len</em> bytes from <em>p</em> into the buffer at the current +index position, overwriting any characters there and extending the +buffer if necessary. Returns the number of bytes actually written. +<p> Returns -1 if an error occurred. +<p> <p>See also <a href="qiodevice.html#readBlock">readBlock</a>(). + +<p>Reimplemented from <a href="qiodevice.html#writeBlock">TQIODevice</a>. +<h3 class=fn>Q_LONG <a name="writeBlock-2"></a>TQBuffer::writeBlock ( const <a href="qbytearray.html">TQByteArray</a> & data ) +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> This convenience function is the same as calling +<tt>writeBlock( data.data(), data.size() )</tt> with <em>data</em>. + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">TQt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. 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