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668 lines
40 KiB
668 lines
40 KiB
14 years ago
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/tools/qtextstream.cpp:56 -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>QTextStream Class</title>
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<font color="#004faf">All Classes</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QTextStream Class Reference</h1>
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<p>The QTextStream class provides basic functions for reading
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and writing text using a QIODevice.
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<a href="#details">More...</a>
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<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when Qt is built with thread support.</p>
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<p><tt>#include <<a href="qtextstream-h.html">qtextstream.h</a>></tt>
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<p>Inherited by <a href="qtextistream.html">QTextIStream</a> and <a href="qtextostream.html">QTextOStream</a>.
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<p><a href="qtextstream-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn>enum <a href="#Encoding-enum"><b>Encoding</b></a> { Locale, Latin1, Unicode, UnicodeNetworkOrder, UnicodeReverse, RawUnicode, UnicodeUTF8 }</li>
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<li class=fn>void <a href="#setEncoding"><b>setEncoding</b></a> ( Encoding e )</li>
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<li class=fn>void <a href="#setCodec"><b>setCodec</b></a> ( QTextCodec * codec )</li>
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<li class=fn>QTextCodec * <a href="#codec"><b>codec</b></a> ()</li>
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<li class=fn><a href="#QTextStream"><b>QTextStream</b></a> ()</li>
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<li class=fn><a href="#QTextStream-2"><b>QTextStream</b></a> ( QIODevice * iod )</li>
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<li class=fn><a href="#QTextStream-3"><b>QTextStream</b></a> ( QString * str, int filemode )</li>
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<li class=fn>QTextStream ( QString & str, int filemode ) <em>(obsolete)</em></li>
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<li class=fn><a href="#QTextStream-5"><b>QTextStream</b></a> ( QByteArray a, int mode )</li>
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<li class=fn><a href="#QTextStream-6"><b>QTextStream</b></a> ( FILE * fh, int mode )</li>
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<li class=fn>virtual <a href="#~QTextStream"><b>~QTextStream</b></a> ()</li>
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<li class=fn>QIODevice * <a href="#device"><b>device</b></a> () const</li>
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<li class=fn>void <a href="#setDevice"><b>setDevice</b></a> ( QIODevice * iod )</li>
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<li class=fn>void <a href="#unsetDevice"><b>unsetDevice</b></a> ()</li>
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<li class=fn>bool <a href="#atEnd"><b>atEnd</b></a> () const</li>
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<li class=fn>bool eof () const <em>(obsolete)</em></li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( QChar & c )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-2"><b>operator>></b></a> ( char & c )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-3"><b>operator>></b></a> ( signed short & i )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-4"><b>operator>></b></a> ( unsigned short & i )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-5"><b>operator>></b></a> ( signed int & i )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-6"><b>operator>></b></a> ( unsigned int & i )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-7"><b>operator>></b></a> ( signed long & i )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-8"><b>operator>></b></a> ( unsigned long & i )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-9"><b>operator>></b></a> ( float & f )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-a"><b>operator>></b></a> ( double & f )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-b"><b>operator>></b></a> ( char * s )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-c"><b>operator>></b></a> ( QString & str )</li>
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<li class=fn>QTextStream & <a href="#operator-gt-gt-d"><b>operator>></b></a> ( QCString & str )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( QChar c )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-2"><b>operator<<</b></a> ( char c )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-3"><b>operator<<</b></a> ( signed short i )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-4"><b>operator<<</b></a> ( unsigned short i )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-5"><b>operator<<</b></a> ( signed int i )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-6"><b>operator<<</b></a> ( unsigned int i )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-7"><b>operator<<</b></a> ( signed long i )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-8"><b>operator<<</b></a> ( unsigned long i )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-9"><b>operator<<</b></a> ( float f )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-a"><b>operator<<</b></a> ( double f )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-b"><b>operator<<</b></a> ( const char * s )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-c"><b>operator<<</b></a> ( const QString & s )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-d"><b>operator<<</b></a> ( const QCString & s )</li>
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<li class=fn>QTextStream & <a href="#operator-lt-lt-e"><b>operator<<</b></a> ( void * ptr )</li>
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<li class=fn>QTextStream & <a href="#readRawBytes"><b>readRawBytes</b></a> ( char * s, uint len )</li>
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<li class=fn>QTextStream & <a href="#writeRawBytes"><b>writeRawBytes</b></a> ( const char * s, uint len )</li>
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<li class=fn>QString <a href="#readLine"><b>readLine</b></a> ()</li>
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<li class=fn>QString <a href="#read"><b>read</b></a> ()</li>
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<li class=fn>void <a href="#skipWhiteSpace"><b>skipWhiteSpace</b></a> ()</li>
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<li class=fn>int <a href="#flags"><b>flags</b></a> () const</li>
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<li class=fn>int <a href="#flags-2"><b>flags</b></a> ( int f )</li>
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<li class=fn>int <a href="#setf"><b>setf</b></a> ( int bits )</li>
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<li class=fn>int <a href="#setf-2"><b>setf</b></a> ( int bits, int mask )</li>
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<li class=fn>int <a href="#unsetf"><b>unsetf</b></a> ( int bits )</li>
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<li class=fn>void <a href="#reset"><b>reset</b></a> ()</li>
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<li class=fn>int <a href="#width"><b>width</b></a> () const</li>
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<li class=fn>int <a href="#width-2"><b>width</b></a> ( int w )</li>
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<li class=fn>int <a href="#fill"><b>fill</b></a> () const</li>
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<li class=fn>int <a href="#fill-2"><b>fill</b></a> ( int f )</li>
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<li class=fn>int <a href="#precision"><b>precision</b></a> () const</li>
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<li class=fn>int <a href="#precision-2"><b>precision</b></a> ( int p )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The QTextStream class provides basic functions for reading
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and writing text using a <a href="qiodevice.html">QIODevice</a>.
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<p>
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<p> The text stream class has a functional interface that is very
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similar to that of the standard C++ iostream class.
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<p> Qt provides several global functions similar to the ones in iostream:
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<center><table cellpadding="4" cellspacing="2" border="0">
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<tr bgcolor="#a2c511"> <th valign="top">Function <th valign="top">Meaning
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<tr bgcolor="#f0f0f0"> <td valign="top">bin <td valign="top">sets the QTextStream to read/write binary numbers
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<tr bgcolor="#d0d0d0"> <td valign="top">oct <td valign="top">sets the QTextStream to read/write octal numbers
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<tr bgcolor="#f0f0f0"> <td valign="top">dec <td valign="top">sets the QTextStream to read/write decimal numbers
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<tr bgcolor="#d0d0d0"> <td valign="top">hex <td valign="top">sets the QTextStream to read/write hexadecimal numbers
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<tr bgcolor="#f0f0f0"> <td valign="top">endl <td valign="top">forces a line break
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<tr bgcolor="#d0d0d0"> <td valign="top">flush <td valign="top">forces the QIODevice to flush any buffered data
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<tr bgcolor="#f0f0f0"> <td valign="top">ws <td valign="top">eats any available whitespace (on input)
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<tr bgcolor="#d0d0d0"> <td valign="top">reset <td valign="top">resets the QTextStream to its default mode (see <a href="#reset">reset</a>())
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<tr bgcolor="#f0f0f0"> <td valign="top">qSetW(int) <td valign="top">sets the <a href="#width">field width</a>
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to the given argument
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<tr bgcolor="#d0d0d0"> <td valign="top">qSetFill(int) <td valign="top">sets the <a href="#fill">fill character</a> to the given argument
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<tr bgcolor="#f0f0f0"> <td valign="top">qSetPrecision(int) <td valign="top">sets the <a href="#precision">precision</a> to the given argument
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</table></center>
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<p> <b>Warning:</b> By default QTextStream will automatically detect whether
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integers in the stream are in decimal, octal, hexadecimal or
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binary format when reading from the stream. In particular, a
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leading '0' signifies octal, i.e. the sequence "0100" will be
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interpreted as 64.
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<p> The QTextStream class reads and writes text; it is not appropriate
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for dealing with binary data (but <a href="qdatastream.html">QDataStream</a> is).
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<p> By default, output of Unicode text (i.e. <a href="qstring.html">QString</a>) is done using
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the local 8-bit encoding. This can be changed using the
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<a href="#setEncoding">setEncoding</a>() method. For input, the QTextStream will auto-detect
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standard Unicode "byte order marked" text files; otherwise the
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local 8-bit encoding is used.
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<p> The <a href="qiodevice.html">QIODevice</a> is set in the constructor, or later using
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<a href="#setDevice">setDevice</a>(). If the end of the input is reached <a href="#atEnd">atEnd</a>() returns
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TRUE. Data can be read into variables of the appropriate type
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using the <a href="#operator-gt-gt">operator>></a>() overloads, or read in its entirety into a
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single string using <a href="#read">read</a>(), or read a line at a time using
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<a href="#readLine">readLine</a>(). Whitespace can be skipped over using <a href="#skipWhiteSpace">skipWhiteSpace</a>().
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You can set flags for the stream using <a href="#flags">flags</a>() or <a href="#setf">setf</a>(). The
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stream also supports <a href="#width">width</a>(), <a href="#precision">precision</a>() and <a href="#fill">fill</a>(); use <a href="#reset">reset</a>()
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to reset the defaults.
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<p> <p>See also <a href="qdatastream.html">QDataStream</a>, <a href="io.html">Input/Output and Networking</a>, and <a href="text.html">Text Related Classes</a>.
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<hr><h2>Member Type Documentation</h2>
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<h3 class=fn><a name="Encoding-enum"></a>QTextStream::Encoding</h3>
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<ul>
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<li><tt>QTextStream::Locale</tt>
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<li><tt>QTextStream::Latin1</tt>
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<li><tt>QTextStream::Unicode</tt>
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<li><tt>QTextStream::UnicodeNetworkOrder</tt>
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<li><tt>QTextStream::UnicodeReverse</tt>
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<li><tt>QTextStream::RawUnicode</tt>
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<li><tt>QTextStream::UnicodeUTF8</tt>
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</ul><p> See <a href="#setEncoding">setEncoding</a>() for an explanation of the encodings.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QTextStream"></a>QTextStream::QTextStream ()
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</h3>
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Constructs a data stream that has no IO device.
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<h3 class=fn><a name="QTextStream-2"></a>QTextStream::QTextStream ( <a href="qiodevice.html">QIODevice</a> * iod )
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</h3>
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Constructs a text stream that uses the IO device <em>iod</em>.
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<h3 class=fn><a name="QTextStream-3"></a>QTextStream::QTextStream ( <a href="qstring.html">QString</a> * str, int filemode )
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</h3>
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Constructs a text stream that operates on the Unicode <a href="qstring.html">QString</a>, <em>str</em>, through an internal device. The <em>filemode</em> argument is
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passed to the device's open() function; see <a href="qiodevice.html#mode">QIODevice::mode</a>().
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<p> If you set an encoding or codec with <a href="#setEncoding">setEncoding</a>() or <a href="#setCodec">setCodec</a>(),
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this setting is ignored for text streams that operate on QString.
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<p> Example:
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<pre>
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<a href="qstring.html">QString</a> str;
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QTextStream ts( &str, <a href="qfile.html#open">IO_WriteOnly</a> );
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ts << "pi = " << 3.14; // str == "pi = 3.14"
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</pre>
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<p> Writing data to the text stream will modify the contents of the
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string. The string will be expanded when data is written beyond
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the end of the string. Note that the string will not be truncated:
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<pre>
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<a href="qstring.html">QString</a> str = "pi = 3.14";
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QTextStream ts( &str, IO_WriteOnly );
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ts << "2+2 = " << 2+2; // str == "2+2 = 414"
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</pre>
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<p> Note that because QString is Unicode, you should not use
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<a href="#readRawBytes">readRawBytes</a>() or <a href="#writeRawBytes">writeRawBytes</a>() on such a stream.
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<h3 class=fn><a name="QTextStream-4"></a>QTextStream::QTextStream ( <a href="qstring.html">QString</a> & str, int filemode )
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</h3> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p> This constructor is equivalent to the constructor taking a <a href="qstring.html">QString</a>*
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parameter.
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<h3 class=fn><a name="QTextStream-5"></a>QTextStream::QTextStream ( <a href="qbytearray.html">QByteArray</a> a, int mode )
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</h3>
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Constructs a text stream that operates on the byte array, <em>a</em>,
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through an internal <a href="qbuffer.html">QBuffer</a> device. The <em>mode</em> argument is passed
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to the device's open() function; see <a href="qiodevice.html#mode">QIODevice::mode</a>().
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<p> Example:
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<pre>
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<a href="qbytearray.html">QByteArray</a> array;
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QTextStream ts( array, <a href="qfile.html#open">IO_WriteOnly</a> );
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ts << "pi = " << 3.14 << '\0'; // array == "pi = 3.14"
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</pre>
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<p> Writing data to the text stream will modify the contents of the
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array. The array will be expanded when data is written beyond the
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end of the string.
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<p> Same example, using a QBuffer:
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<pre>
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<a href="qbytearray.html">QByteArray</a> array;
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<a href="qbuffer.html">QBuffer</a> buf( array );
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buf.<a href="qiodevice.html#open">open</a>( IO_WriteOnly );
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QTextStream ts( &buf );
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ts << "pi = " << 3.14 << '\0'; // array == "pi = 3.14"
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buf.<a href="qiodevice.html#close">close</a>();
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
|
||
|
|
<h3 class=fn><a name="QTextStream-6"></a>QTextStream::QTextStream ( FILE * fh, int mode )
|
||
|
|
</h3>
|
||
|
|
Constructs a text stream that operates on an existing file handle
|
||
|
|
<em>fh</em> through an internal <a href="qfile.html">QFile</a> device. The <em>mode</em> argument is
|
||
|
|
passed to the device's open() function; see <a href="qiodevice.html#mode">QIODevice::mode</a>().
|
||
|
|
<p> Note that if you create a QTextStream <tt>cout</tt> or another name that
|
||
|
|
is also used for another variable of a different type, some
|
||
|
|
linkers may confuse the two variables, which will often cause
|
||
|
|
crashes.
|
||
|
|
|
||
|
|
<h3 class=fn><a name="~QTextStream"></a>QTextStream::~QTextStream ()<tt> [virtual]</tt>
|
||
|
|
</h3>
|
||
|
|
Destroys the text stream.
|
||
|
|
<p> The destructor does not affect the current IO device.
|
||
|
|
|
||
|
|
<h3 class=fn>bool <a name="atEnd"></a>QTextStream::atEnd () const
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Returns TRUE if the IO device has reached the end position (end of
|
||
|
|
the stream or file) or if there is no IO device set; otherwise
|
||
|
|
returns FALSE.
|
||
|
|
<p> <p>See also <a href="qiodevice.html#atEnd">QIODevice::atEnd</a>().
|
||
|
|
|
||
|
|
<p>Examples: <a href="addressbook-example.html#x601">addressbook/centralwidget.cpp</a> and <a href="grapher-nsplugin-example.html#x2774">grapher/grapher.cpp</a>.
|
||
|
|
<h3 class=fn><a href="qtextcodec.html">QTextCodec</a> * <a name="codec"></a>QTextStream::codec ()
|
||
|
|
</h3>
|
||
|
|
Returns the codec actually used for this stream.
|
||
|
|
<p> If Unicode is automatically detected in input, a codec with <a href="qtextcodec.html#name">name()</a> "ISO-10646-UCS-2" is returned.
|
||
|
|
<p> <p>See also <a href="#setCodec">setCodec</a>().
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qiodevice.html">QIODevice</a> * <a name="device"></a>QTextStream::device () const
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Returns the IO device currently set.
|
||
|
|
<p> <p>See also <a href="#setDevice">setDevice</a>() and <a href="#unsetDevice">unsetDevice</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>bool <a name="eof"></a>QTextStream::eof () const
|
||
|
|
</h3>
|
||
|
|
<p> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
|
||
|
|
<p> This function has been renamed to <a href="#atEnd">atEnd</a>().
|
||
|
|
<p> <p>See also <a href="qiodevice.html#atEnd">QIODevice::atEnd</a>().
|
||
|
|
|
||
|
|
<p>Example: <a href="tutorial2-07.html#x2592">chart/chartform_files.cpp</a>.
|
||
|
|
<h3 class=fn>int <a name="fill"></a>QTextStream::fill () const
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Returns the fill character. The default value is ' ' (space).
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="fill-2"></a>QTextStream::fill ( int f )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Sets the fill character to <em>f</em>. Returns the previous fill character.
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="flags"></a>QTextStream::flags () const
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Returns the current stream flags. The default value is 0.
|
||
|
|
<p> <center><table cellpadding="4" cellspacing="2" border="0">
|
||
|
|
<tr bgcolor="#a2c511"> <th valign="top">Flag <th valign="top">Meaning
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>skipws</tt> <td valign="top">Not currently used; whitespace always skipped
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>left</tt> <td valign="top">Numeric fields are left-aligned
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>right</tt>
|
||
|
|
<td valign="top">Not currently used (by default, numerics are right-aligned)
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>internal</tt> <td valign="top">Puts any padding spaces between +/- and value
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>bin</tt> <td valign="top">Output <em>and</em> input only in binary
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>oct</tt> <td valign="top">Output <em>and</em> input only in octal
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>dec</tt> <td valign="top">Output <em>and</em> input only in decimal
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>hex</tt> <td valign="top">Output <em>and</em> input only in hexadecimal
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>showbase</tt>
|
||
|
|
<td valign="top">Annotates numeric outputs with 0b, 0, or 0x if in <tt>bin</tt>,
|
||
|
|
<tt>oct</tt>, or <tt>hex</tt> format
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>showpoint</tt> <td valign="top">Not currently used
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>uppercase</tt> <td valign="top">Uses 0B and 0X rather than 0b and 0x
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>showpos</tt> <td valign="top">Shows + for positive numeric values
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top"><tt>scientific</tt> <td valign="top">Uses scientific notation for floating point values
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top"><tt>fixed</tt> <td valign="top">Uses fixed-point notation for floating point values
|
||
|
|
</table></center>
|
||
|
|
<p> Note that unless <tt>bin</tt>, <tt>oct</tt>, <tt>dec</tt>, or <tt>hex</tt> is set, the
|
||
|
|
input base is octal if the value starts with 0, hexadecimal if it
|
||
|
|
starts with 0x, binary if it starts with 0b, and decimal
|
||
|
|
otherwise.
|
||
|
|
<p> <p>See also <a href="#setf">setf</a>() and <a href="#unsetf">unsetf</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="flags-2"></a>QTextStream::flags ( int f )
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Sets the stream flags to <em>f</em>. Returns the previous stream flags.
|
||
|
|
<p> <p>See also <a href="#setf">setf</a>() and <a href="#unsetf">unsetf</a>().
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt"></a>QTextStream::operator<< ( <a href="qchar.html">QChar</a> c )
|
||
|
|
</h3>
|
||
|
|
Writes character <tt>char</tt> to the stream and returns a reference to
|
||
|
|
the stream.
|
||
|
|
<p> The character <em>c</em> is assumed to be Latin1 encoded independent of
|
||
|
|
the Encoding set for the QTextStream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-2"></a>QTextStream::operator<< ( char c )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes character <em>c</em> to the stream and returns a reference to the
|
||
|
|
stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-3"></a>QTextStream::operator<< ( signed short i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes a <tt>short</tt> integer <em>i</em> to the stream and returns a
|
||
|
|
reference to the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-4"></a>QTextStream::operator<< ( unsigned short i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes an <tt>unsigned</tt> <tt>short</tt> integer <em>i</em> to the stream and
|
||
|
|
returns a reference to the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-5"></a>QTextStream::operator<< ( signed int i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes an <tt>int</tt> <em>i</em> to the stream and returns a reference to the
|
||
|
|
stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-6"></a>QTextStream::operator<< ( unsigned int i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes an <tt>unsigned</tt> <tt>int</tt> <em>i</em> to the stream and returns a
|
||
|
|
reference to the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-7"></a>QTextStream::operator<< ( signed long i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes a <tt>long</tt> <tt>int</tt> <em>i</em> to the stream and returns a reference
|
||
|
|
to the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-8"></a>QTextStream::operator<< ( unsigned long i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes an <tt>unsigned</tt> <tt>long</tt> <tt>int</tt> <em>i</em> to the stream and
|
||
|
|
returns a reference to the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-9"></a>QTextStream::operator<< ( float f )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes a <tt>float</tt> <em>f</em> to the stream and returns a reference to
|
||
|
|
the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-a"></a>QTextStream::operator<< ( double f )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes a <tt>double</tt> <em>f</em> to the stream and returns a reference to
|
||
|
|
the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-b"></a>QTextStream::operator<< ( const char * s )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes a string to the stream and returns a reference to the
|
||
|
|
stream.
|
||
|
|
<p> The string <em>s</em> is assumed to be Latin1 encoded independent of the
|
||
|
|
Encoding set for the QTextStream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-c"></a>QTextStream::operator<< ( const <a href="qstring.html">QString</a> & s )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes <em>s</em> to the stream and returns a reference to the stream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-d"></a>QTextStream::operator<< ( const <a href="qcstring.html">QCString</a> & s )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes <em>s</em> to the stream and returns a reference to the stream.
|
||
|
|
<p> The string <em>s</em> is assumed to be Latin1 encoded independent of the
|
||
|
|
Encoding set for the QTextStream.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-lt-lt-e"></a>QTextStream::operator<< ( void * ptr )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Writes a pointer to the stream and returns a reference to the
|
||
|
|
stream.
|
||
|
|
<p> The <em>ptr</em> is output as an unsigned long hexadecimal integer.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt"></a>QTextStream::operator>> ( <a href="qchar.html">QChar</a> & c )
|
||
|
|
</h3>
|
||
|
|
Reads a char <em>c</em> from the stream and returns a reference to the
|
||
|
|
stream. Note that whitespace is <em>not</em> skipped.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-2"></a>QTextStream::operator>> ( char & c )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a char <em>c</em> from the stream and returns a reference to the
|
||
|
|
stream. Note that whitespace is skipped.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-3"></a>QTextStream::operator>> ( signed short & i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a signed <tt>short</tt> integer <em>i</em> from the stream and returns a
|
||
|
|
reference to the stream. See <a href="#flags">flags</a>() for an explanation of the
|
||
|
|
expected input format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-4"></a>QTextStream::operator>> ( unsigned short & i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads an unsigned <tt>short</tt> integer <em>i</em> from the stream and
|
||
|
|
returns a reference to the stream. See <a href="#flags">flags</a>() for an explanation
|
||
|
|
of the expected input format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-5"></a>QTextStream::operator>> ( signed int & i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a signed <tt>int</tt> <em>i</em> from the stream and returns a reference
|
||
|
|
to the stream. See <a href="#flags">flags</a>() for an explanation of the expected
|
||
|
|
input format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-6"></a>QTextStream::operator>> ( unsigned int & i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads an unsigned <tt>int</tt> <em>i</em> from the stream and returns a
|
||
|
|
reference to the stream. See <a href="#flags">flags</a>() for an explanation of the
|
||
|
|
expected input format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-7"></a>QTextStream::operator>> ( signed long & i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a signed <tt>long</tt> int <em>i</em> from the stream and returns a
|
||
|
|
reference to the stream. See <a href="#flags">flags</a>() for an explanation of the
|
||
|
|
expected input format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-8"></a>QTextStream::operator>> ( unsigned long & i )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads an unsigned <tt>long</tt> int <em>i</em> from the stream and returns a
|
||
|
|
reference to the stream. See <a href="#flags">flags</a>() for an explanation of the
|
||
|
|
expected input format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-9"></a>QTextStream::operator>> ( float & f )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a <tt>float</tt> <em>f</em> from the stream and returns a reference to
|
||
|
|
the stream. See <a href="#flags">flags</a>() for an explanation of the expected input
|
||
|
|
format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-a"></a>QTextStream::operator>> ( double & f )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a <tt>double</tt> <em>f</em> from the stream and returns a reference to
|
||
|
|
the stream. See <a href="#flags">flags</a>() for an explanation of the expected input
|
||
|
|
format.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-b"></a>QTextStream::operator>> ( char * s )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a "word" from the stream into <em>s</em> and returns a reference
|
||
|
|
to the stream.
|
||
|
|
<p> A word consists of characters for which isspace() returns FALSE.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-c"></a>QTextStream::operator>> ( <a href="qstring.html">QString</a> & str )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a "word" from the stream into <em>str</em> and returns a reference
|
||
|
|
to the stream.
|
||
|
|
<p> A word consists of characters for which isspace() returns FALSE.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="operator-gt-gt-d"></a>QTextStream::operator>> ( <a href="qcstring.html">QCString</a> & str )
|
||
|
|
</h3>
|
||
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Reads a "word" from the stream into <em>str</em> and returns a reference
|
||
|
|
to the stream.
|
||
|
|
<p> A word consists of characters for which isspace() returns FALSE.
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="precision"></a>QTextStream::precision () const
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Returns the precision. The default value is 6.
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="precision-2"></a>QTextStream::precision ( int p )
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Sets the precision to <em>p</em>. Returns the previous precision setting.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qstring.html">QString</a> <a name="read"></a>QTextStream::read ()
|
||
|
|
</h3>
|
||
|
|
Reads the entire stream from the current position, and returns a string
|
||
|
|
containing the text.
|
||
|
|
<p> <p>See also <a href="qiodevice.html#readLine">QIODevice::readLine</a>().
|
||
|
|
|
||
|
|
<p>Examples: <a href="qaction-application-example.html#x1171">action/application.cpp</a>, <a href="simple-application-example.html#x1589">application/application.cpp</a>, <a href="mdi-example.html#x2074">mdi/application.cpp</a>, <a href="qdir-example.html#x1847">qdir/qdir.cpp</a>, and <a href="qwerty-example.html#x401">qwerty/qwerty.cpp</a>.
|
||
|
|
<h3 class=fn><a href="qstring.html">QString</a> <a name="readLine"></a>QTextStream::readLine ()
|
||
|
|
</h3>
|
||
|
|
Reads a line from the stream and returns a string containing the
|
||
|
|
text.
|
||
|
|
<p> The returned string does not contain any trailing newline or
|
||
|
|
carriage return. Note that this is different from
|
||
|
|
<a href="qiodevice.html#readLine">QIODevice::readLine</a>(), which does not strip the newline at the end
|
||
|
|
of the line.
|
||
|
|
<p> On EOF you will get a <a href="qstring.html">QString</a> that is null. On reading an empty
|
||
|
|
line the returned QString is empty but not null.
|
||
|
|
<p> <p>See also <a href="qiodevice.html#readLine">QIODevice::readLine</a>().
|
||
|
|
|
||
|
|
<p>Examples: <a href="addressbook-example.html#x602">addressbook/centralwidget.cpp</a>, <a href="tutorial2-03.html#x2553">chart/element.cpp</a>, and <a href="clientserver-example.html#x787">network/clientserver/server/server.cpp</a>.
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="readRawBytes"></a>QTextStream::readRawBytes ( char * s, uint len )
|
||
|
|
</h3>
|
||
|
|
Reads <em>len</em> bytes from the stream into <em>s</em> and returns a
|
||
|
|
reference to the stream.
|
||
|
|
<p> The buffer <em>s</em> must be preallocated.
|
||
|
|
<p> Note that no encoding is done by this function.
|
||
|
|
<p> <b>Warning:</b> The behavior of this function is undefined unless the
|
||
|
|
stream's encoding is set to Unicode or Latin1.
|
||
|
|
<p> <p>See also <a href="qiodevice.html#readBlock">QIODevice::readBlock</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>void <a name="reset"></a>QTextStream::reset ()
|
||
|
|
</h3>
|
||
|
|
Resets the text stream.
|
||
|
|
<p> <ul>
|
||
|
|
<li> All flags are set to 0.
|
||
|
|
<li> The field width is set to 0.
|
||
|
|
<li> The fill character is set to ' ' (Space).
|
||
|
|
<li> The precision is set to 6.
|
||
|
|
</ul>
|
||
|
|
<p> <p>See also <a href="#setf">setf</a>(), <a href="#width">width</a>(), <a href="#fill">fill</a>(), and <a href="#precision">precision</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>void <a name="setCodec"></a>QTextStream::setCodec ( <a href="qtextcodec.html">QTextCodec</a> * codec )
|
||
|
|
</h3>
|
||
|
|
Sets the codec for this stream to <em>codec</em>. Will not try to
|
||
|
|
autodetect Unicode.
|
||
|
|
<p> Note that this function should be called before any data is read
|
||
|
|
to/written from the stream.
|
||
|
|
<p> <p>See also <a href="#setEncoding">setEncoding</a>() and <a href="#codec">codec</a>().
|
||
|
|
|
||
|
|
<p>Example: <a href="qwerty-example.html#x402">qwerty/qwerty.cpp</a>.
|
||
|
|
<h3 class=fn>void <a name="setDevice"></a>QTextStream::setDevice ( <a href="qiodevice.html">QIODevice</a> * iod )
|
||
|
|
</h3>
|
||
|
|
Sets the IO device to <em>iod</em>.
|
||
|
|
<p> <p>See also <a href="#device">device</a>() and <a href="#unsetDevice">unsetDevice</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>void <a name="setEncoding"></a>QTextStream::setEncoding ( <a href="qtextstream.html#Encoding-enum">Encoding</a> e )
|
||
|
|
</h3>
|
||
|
|
Sets the encoding of this stream to <em>e</em>, where <em>e</em> is one of the
|
||
|
|
following values:
|
||
|
|
<center><table cellpadding="4" cellspacing="2" border="0">
|
||
|
|
<tr bgcolor="#a2c511"> <th valign="top">Encoding <th valign="top">Meaning
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">Locale
|
||
|
|
<td valign="top">Uses local file format (Latin1 if locale is not set), but
|
||
|
|
autodetecting Unicode(utf16) on input.
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">Unicode
|
||
|
|
<td valign="top">Uses Unicode(utf16) for input and output. Output will be
|
||
|
|
written in the order most efficient for the current platform
|
||
|
|
(i.e. the order used internally in <a href="qstring.html">QString</a>).
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">UnicodeUTF8
|
||
|
|
<td valign="top">Using Unicode(utf8) for input and output. If you use it for
|
||
|
|
input it will autodetect utf16 and use it instead of utf8.
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">Latin1
|
||
|
|
<td valign="top">ISO-8859-1. Will not autodetect utf16.
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">UnicodeNetworkOrder
|
||
|
|
<td valign="top">Uses network order Unicode(utf16) for input and output.
|
||
|
|
Useful when reading Unicode data that does not start with the
|
||
|
|
byte order marker.
|
||
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">UnicodeReverse
|
||
|
|
<td valign="top">Uses reverse network order Unicode(utf16) for input and
|
||
|
|
output. Useful when reading Unicode data that does not start
|
||
|
|
with the byte order marker or when writing data that should be
|
||
|
|
read by buggy Windows applications.
|
||
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">RawUnicode
|
||
|
|
<td valign="top">Like Unicode, but does not write the byte order marker nor
|
||
|
|
does it auto-detect the byte order. Useful only when writing to
|
||
|
|
non-persistent storage used by a single process.
|
||
|
|
</table></center>
|
||
|
|
<p> <a href="#Encoding-enum">Locale</a> and all Unicode encodings, except <a href="#Encoding-enum">RawUnicode</a>, will look
|
||
|
|
at the first two bytes in an input stream to determine the byte
|
||
|
|
order. The initial byte order marker will be stripped off before
|
||
|
|
data is read.
|
||
|
|
<p> Note that this function should be called before any data is read to
|
||
|
|
or written from the stream.
|
||
|
|
<p> <p>See also <a href="#setCodec">setCodec</a>().
|
||
|
|
|
||
|
|
<p>Examples: <a href="addressbook-example.html#x603">addressbook/centralwidget.cpp</a>, <a href="httpd-example.html#x735">network/httpd/httpd.cpp</a>, and <a href="qwerty-example.html#x403">qwerty/qwerty.cpp</a>.
|
||
|
|
<h3 class=fn>int <a name="setf"></a>QTextStream::setf ( int bits )
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Sets the stream flag bits <em>bits</em>. Returns the previous stream
|
||
|
|
flags.
|
||
|
|
<p> Equivalent to <tt>flags( flags() | bits )</tt>.
|
||
|
|
<p> <p>See also <a href="#unsetf">unsetf</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="setf-2"></a>QTextStream::setf ( int bits, int mask )
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Sets the stream flag bits <em>bits</em> with a bit mask <em>mask</em>. Returns
|
||
|
|
the previous stream flags.
|
||
|
|
<p> Equivalent to <tt>flags( (flags() & ~mask) | (bits & mask) )</tt>.
|
||
|
|
<p> <p>See also <a href="#unsetf">unsetf</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>void <a name="skipWhiteSpace"></a>QTextStream::skipWhiteSpace ()
|
||
|
|
</h3>
|
||
|
|
Positions the read pointer at the first non-whitespace character.
|
||
|
|
|
||
|
|
<h3 class=fn>void <a name="unsetDevice"></a>QTextStream::unsetDevice ()
|
||
|
|
</h3>
|
||
|
|
Unsets the IO device. Equivalent to <a href="#setDevice">setDevice</a>( 0 ).
|
||
|
|
<p> <p>See also <a href="#device">device</a>() and <a href="#setDevice">setDevice</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="unsetf"></a>QTextStream::unsetf ( int bits )
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Clears the stream flag bits <em>bits</em>. Returns the previous stream
|
||
|
|
flags.
|
||
|
|
<p> Equivalent to <tt>flags( flags() & ~mask )</tt>.
|
||
|
|
<p> <p>See also <a href="#setf">setf</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="width"></a>QTextStream::width () const
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> Returns the field width. The default value is 0.
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="width-2"></a>QTextStream::width ( int w )
|
||
|
|
</h3>
|
||
|
|
|
||
|
|
<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
||
|
|
<p> Sets the field width to <em>w</em>. Returns the previous field width.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qtextstream.html">QTextStream</a> & <a name="writeRawBytes"></a>QTextStream::writeRawBytes ( const char * s, uint len )
|
||
|
|
</h3>
|
||
|
|
Writes the <em>len</em> bytes from <em>s</em> to the stream and returns a
|
||
|
|
reference to the stream.
|
||
|
|
<p> Note that no encoding is done by this function.
|
||
|
|
<p> <p>See also <a href="qiodevice.html#writeBlock">QIODevice::writeBlock</a>().
|
||
|
|
|
||
|
|
<!-- eof -->
|
||
|
|
<hr><p>
|
||
|
|
This file is part of the <a href="index.html">Qt toolkit</a>.
|
||
|
|
Copyright © 1995-2007
|
||
|
|
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
||
|
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
|
<td>Copyright © 2007
|
||
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
|
<td align=right><div align=right>Qt 3.3.8</div>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|