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<h1 align=center>QTextStream Class Reference</h1><br clear="all">
<p>
The QTextStream class provides basic functions for reading and writing text using a <a href="qiodevice.html">QIODevice</a>.
<a href="#details">More...</a>
<p>
<code>#include <<a href="qtextstream-h.html">qtextstream.h</a>></code>
<p><a href="qtextstream-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><span class="fn"><a href="qtextstream.html#a0"><strong>QTextStream</strong></a>()</span>
<li><span class="fn"><a href="qtextstream.html#a1"><strong>QTextStream</strong></a>(QIODevice*)</span>
<li><span class="fn"><a href="qtextstream.html#a2"><strong>QTextStream</strong></a>(QByteArray, intmode)</span>
<li><span class="fn"><a href="qtextstream.html#a3"><strong>QTextStream</strong></a>(FILE*, intmode)</span>
<li><span class="fn">virtual<a href="qtextstream.html#a4"><strong>~QTextStream</strong></a>()</span>
<li><span class="fn">QIODevice*<a href="qtextstream.html#a5"><strong>device</strong></a>()const</span>
<li><span class="fn">void<a href="qtextstream.html#a6"><strong>setDevice</strong></a>(QIODevice*)</span>
<li><span class="fn">void<a href="qtextstream.html#a7"><strong>unsetDevice</strong></a>()</span>
<li><span class="fn">bool<a href="qtextstream.html#a8"><strong>eof</strong></a>()const</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#a9"><strong>operator>></strong></a>(char&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b0"><strong>operator>></strong></a>(signedshort&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b1"><strong>operator>></strong></a>(unsignedshort&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b2"><strong>operator>></strong></a>(signedint&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b3"><strong>operator>></strong></a>(unsignedint&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b4"><strong>operator>></strong></a>(signedlong&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b5"><strong>operator>></strong></a>(unsignedlong&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b6"><strong>operator>></strong></a>(float&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b7"><strong>operator>></strong></a>(double&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b8"><strong>operator>></strong></a>(char*)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#b9"><strong>operator>></strong></a>(QString&)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c0"><strong>operator<<</strong></a>(char)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c1"><strong>operator<<</strong></a>(signedshort)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c2"><strong>operator<<</strong></a>(unsignedshort)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c3"><strong>operator<<</strong></a>(signedint)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c4"><strong>operator<<</strong></a>(unsignedint)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c5"><strong>operator<<</strong></a>(signedlong)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c6"><strong>operator<<</strong></a>(unsignedlong)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c7"><strong>operator<<</strong></a>(float)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c8"><strong>operator<<</strong></a>(double)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#c9"><strong>operator<<</strong></a>(constchar*)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#d0"><strong>operator<<</strong></a>(void*)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#d1"><strong>readRawBytes</strong></a>(char*, uintlen)</span>
<li><span class="fn">QTextStream&<a href="qtextstream.html#d2"><strong>writeRawBytes</strong></a>(constchar*, uintlen)</span>
<li><span class="fn">QString<a href="qtextstream.html#d3"><strong>readLine</strong></a>()</span>
<li><span class="fn">enum{skipws=0x0001, left=0x0002, right=0x0004, internal=0x0008, bin=0x0010, oct=0x0020, dec=0x0040, hex=0x0080, showbase=0x0100, showpoint=0x0200, uppercase=0x0400, showpos=0x0800, scientific=0x1000, fixed=0x2000}</span>
<li><span class="fn">int<a href="qtextstream.html#d4"><strong>flags</strong></a>()const</span>
<li><span class="fn">int<a href="qtextstream.html#d5"><strong>flags</strong></a>(intf)</span>
<li><span class="fn">int<a href="qtextstream.html#d6"><strong>setf</strong></a>(intbits)</span>
<li><span class="fn">int<a href="qtextstream.html#d7"><strong>setf</strong></a>(intbits, intmask)</span>
<li><span class="fn">int<a href="qtextstream.html#d8"><strong>unsetf</strong></a>(intbits)</span>
<li><span class="fn">void<a href="qtextstream.html#d9"><strong>reset</strong></a>()</span>
<li><span class="fn">int<a href="qtextstream.html#e0"><strong>width</strong></a>()const</span>
<li><span class="fn">int<a href="qtextstream.html#e1"><strong>width</strong></a>(int)</span>
<li><span class="fn">int<a href="qtextstream.html#e2"><strong>fill</strong></a>()const</span>
<li><span class="fn">int<a href="qtextstream.html#e3"><strong>fill</strong></a>(int)</span>
<li><span class="fn">int<a href="qtextstream.html#e4"><strong>precision</strong></a>()const</span>
<li><span class="fn">int<a href="qtextstream.html#e5"><strong>precision</strong></a>(int)</span>
</ul>
<hr><h2><a name="details"></a>Detailed Description</h2>
The QTextStream class provides basic functions for reading and writing text using a <a href="qiodevice.html">QIODevice</a>.
<p>
The text stream class has a functional interface that is very
similar to that of the standard C++ iostream class. The difference
between iostream and QTextStream is that our stream operates on a
QIODevice, which is easily subclassed, while iostream operates on
FILE * pointers, which can not be subclassed.
<p>Qt provides several global functions similar to the ones in iostream:
<ul>
<li> <code>bin</code> sets the QTextStream to output binary numbers
<li> <code>oct</code> sets the QTextStream to output octal numbers
<li> <code>dec</code> sets the QTextStream to output decimal numbers
<li> <code>hex</code> sets the QTextStream to output hexadecimal numbers
<li> <code>endl</code> forces a line break
<li> <code>flush</code> forces the QIODevice to flush any buffered data
<li> <code>ws</code> eats any available white space (on input)
<li> <code>reset</code> resets the QTextStream to its default mode (see <a href="qtextstream.html#d9">reset</a>()).
</ul>
<p>The QTextStream class reads and writes ASCII text and it is not
appropriate for dealing with binary data (but <a href="qdatastream.html">QDataStream</a> is).
<p>See also: <a href="qdatastream.html">QDataStream</a>.
<p>Examples:
<a href="grapher-grapher-cpp.html#ws">grapher/grapher.cpp</a>
<a href="application-application-cpp.html#QTextStream">application/application.cpp</a>
<hr><h2>Member Function Documentation</h2>
<h3 class="fn"><a name="a0"></a>QTextStream::QTextStream()</h3>
<p>Constructs a data stream that has no IO device.
<h3 class="fn"><a name="a2"></a>QTextStream::QTextStream(<a href="qbytearray.html">QByteArray</a>a, intmode)</h3>
<p>Constructs a text stream that operates on a byte array throught an
internal <a href="qbuffer.html">QBuffer</a> device.
<p>Example:
<pre> <a href="qstring.html">QString</a> str;
<a href="qtextstream.html">QTextStream</a> ts( str, IO_WriteOnly );
ts << "pi = " << 3.14; // str == "pi = 3.14"
</pre>
<p>Writing data to the text stream will modify the contents of the string.
The string will be expanded when data is written beyond the end of the
string.
<p>Same example, using a QBuffer:
<pre> <a href="qstring.html">QString</a> str;
<a href="qbuffer.html">QBuffer</a> buf( str );
buf.<a href="qbuffer.html#a5">open</a>( IO_WriteOnly );
<a href="qtextstream.html">QTextStream</a> ts( &buf );
ts << "pi = " << 3.14; // str == "pi = 3.14"
buf.<a href="qbuffer.html#a6">close</a>();
</pre>
<p>Note that QStrings created in this way will not have NUL terminators.
So unless you are using the string purely as an array of bytes, you
should terminate them:
<pre> <a href="qstring.html">QString</a> str;
...
ts << "pi = " << 3.14; // str == "pi = 3.14"
ts << '\0';
</pre>
<h3 class="fn"><a name="a1"></a>QTextStream::QTextStream(<a href="qiodevice.html">QIODevice</a>*d)</h3>
<p>Constructs a text stream that uses the IO device <em>d.</em>
<h3 class="fn"><a name="a3"></a>QTextStream::QTextStream(FILE*fh, intmode)</h3>
<p>Constructs a text stream that operates on an existing file handle <em>fh</em>
throught an internal <a href="qfile.html">QFile</a> device.
<p>Example:
<pre> <a href="qtextstream.html">QTextStream</a> cout( stdout, IO_WriteOnly );
<a href="qtextstream.html">QTextStream</a> cin ( stdin, IO_ReadOnly );
<a href="qtextstream.html">QTextStream</a> cerr( stderr, IO_WriteOnly );
</pre>
<h3 class="fn"><a name="a4"></a>QTextStream::~QTextStream() <code>[virtual]</code></h3>
<p>Destroys the text stream.
<p>The destructor will not affect the current IO device.
<h3 class="fn"><a href="qiodevice.html">QIODevice</a>*<a name="a5"></a>QTextStream::device()const</h3>
<p>Returns the IO device currently set.
<p>See also: <a href="qtextstream.html#a6">setDevice</a>() and <a href="qtextstream.html#a7">unsetDevice</a>().
<h3 class="fn">bool<a name="a8"></a>QTextStream::eof()const</h3>
<p>Returns TRUE if the IO device has reached the end position (end of
stream or file) or if there is no IO device set.
<p>Returns FALSE if the current position of the read/write head of the IO
device is somewhere before the end position.
<p>See also: <a href="qiodevice.html#c6">QIODevice::atEnd</a>().
<p>Examples:
<a href="grapher-grapher-cpp.html#eof">grapher/grapher.cpp</a>
<a href="application-application-cpp.html#eof">application/application.cpp</a>
<h3 class="fn">int<a name="e2"></a>QTextStream::fill()const</h3>
<p>Returns the fill character. The default value is ' ' (space).
<h3 class="fn">int<a name="e3"></a>QTextStream::fill(intf)</h3>
<p>Sets the fill character to <em>f.</em> Returns the previous fill character.
<h3 class="fn">int<a name="d4"></a>QTextStream::flags()const</h3>
<p>Returns the current stream flags. The default value is 0.
<p>The meaning of the flags are:
<ul>
<li> <em>skipws</em> - Not currently used - whitespace always skipped
<li> <em>left</em> - Numeric fields are left-aligned
<li> <em>right</em> - Not currently used (by default numerics are right aligned)
<li> <em>internal</em> - Put any padding spaces between +/- and value
<li> <em><a href="qtextstream.html">bin</a></em> - Output <em>and</em> input only in binary
<li> <em><a href="qtextstream.html">oct</a></em> - Output <em>and</em> input only in octal
<li> <em><a href="qtextstream.html">dec</a></em> - Output <em>and</em> input only in decimal
<li> <em><a href="qtextstream.html">hex</a></em> - Output <em>and</em> input only in hexadecimal
<li> <em>showbase</em> - Annotate numeric outputs with 0b, 0, or 0x if in
<em>bin, oct,</em> or <em>hex</em> format
<li> <em>showpoint</em> - Not currently used
<li> <em>uppercase</em> - Use 0B and 0X rather than 0b and 0x
<li> <em>showpos</em> - Show + for positive numeric values
<li> <em>scientific</em> - Use scientific notation for floating point values
<li> <em>fixed</em> - Use fixed-point notation for floating point values
</ul>
<p>Note that unless <em>bin, oct, dec,</em> or <em>hex</em> is set, the input base is
octal if the value starts with 0, hexadecimal if it starts with 0x, binary
if the value starts with 0b, and decimal otherwise.
<p>See also: <a href="qtextstream.html#d6">setf</a>() and <a href="qtextstream.html#d8">unsetf</a>().
<h3 class="fn">int<a name="d5"></a>QTextStream::flags(intf)</h3>
<p>Sets the stream flags to <em>f.</em>
Returns the previous stream flags.
<p>See also: <a href="qtextstream.html#d6">setf</a>(), <a href="qtextstream.html#d8">unsetf</a>() and <a href="qtextstream.html#d4">flags</a>().
<h3 class="fn">QTextStream&<a name="c0"></a>QTextStream::operator<<(charc)</h3>
<p>Writes a <code>char</code> to the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="c9"></a>QTextStream::operator<<(constchar*s)</h3>
<p>Writes a string to the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="c8"></a>QTextStream::operator<<(doublef)</h3>
<p>Writes a <code>double</code> to the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="c7"></a>QTextStream::operator<<(floatf)</h3>
<p>Writes a <code>float</code> to the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="c3"></a>QTextStream::operator<<(signedinti)</h3>
<p>Writes an <code>int</code> to the stream and returns a reference to
the stream.
<h3 class="fn">QTextStream&<a name="c5"></a>QTextStream::operator<<(signedlongi)</h3>
<p>Writes a <code>long int</code> to the stream and returns a reference to
the stream.
<h3 class="fn">QTextStream&<a name="c1"></a>QTextStream::operator<<(signedshorti)</h3>
<p>Writes a <code>short</code> integer to the stream and returns a reference to
the stream.
<h3 class="fn">QTextStream&<a name="c4"></a>QTextStream::operator<<(unsignedinti)</h3>
<p>Writes an <code>unsigned int</code> to the stream and returns a reference to
the stream.
<h3 class="fn">QTextStream&<a name="c6"></a>QTextStream::operator<<(unsignedlongi)</h3>
<p>Writes an <code>unsigned long int</code> to the stream and returns a reference to
the stream.
<h3 class="fn">QTextStream&<a name="c2"></a>QTextStream::operator<<(unsignedshorti)</h3>
<p>Writes an <code>unsigned short</code> integer to the stream and returns a reference
to the stream.
<h3 class="fn">QTextStream&<a name="d0"></a>QTextStream::operator<<(void*ptr)</h3>
<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">QTextStream&<a name="b9"></a>QTextStream::operator>>(<a href="qstring.html">QString</a>&str)</h3>
<p>Reads a word from the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="a9"></a>QTextStream::operator>>(char&c)</h3>
<p>Reads a <code>char</code> from the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="b8"></a>QTextStream::operator>>(char*s)</h3>
<p>Reads a word from the stream and returns a reference to the stream.
<h3 class="fn">QTextStream&<a name="b7"></a>QTextStream::operator>>(double&f)</h3>
<p>Reads a <code>double</code> from the stream and returns a reference to the stream.
See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b6"></a>QTextStream::operator>>(float&f)</h3>
<p>Reads a <code>float</code> from the stream and returns a reference to the stream.
See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b2"></a>QTextStream::operator>>(signedint&i)</h3>
<p>Reads a signed <code>int</code> from the stream and returns a reference to the
stream. See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b4"></a>QTextStream::operator>>(signedlong&i)</h3>
<p>Reads a signed <code>long</code> int from the stream and returns a reference to the
stream. See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b0"></a>QTextStream::operator>>(signedshort&i)</h3>
<p>Reads a signed <code>short</code> integer from the stream and returns a reference to
the stream. See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b3"></a>QTextStream::operator>>(unsignedint&i)</h3>
<p>Reads an unsigned <code>int</code> from the stream and returns a reference to the
stream. See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b5"></a>QTextStream::operator>>(unsignedlong&i)</h3>
<p>Reads an unsigned <code>long</code> int from the stream and returns a reference to the
stream. See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">QTextStream&<a name="b1"></a>QTextStream::operator>>(unsignedshort&i)</h3>
<p>Reads an unsigned <code>short</code> integer from the stream and returns a reference to
the stream. See <a href="qtextstream.html#d4">flags</a>() for an explanation of expected input format.
<h3 class="fn">int<a name="e4"></a>QTextStream::precision()const</h3>
<p>Returns the precision. The default value is 6.
<h3 class="fn">int<a name="e5"></a>QTextStream::precision(intp)</h3>
<p>Sets the precision to <em>p.</em> Returns the previous precision setting.
<h3 class="fn"><a href="qstring.html">QString</a><a name="d3"></a>QTextStream::readLine()</h3>
<p>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#d0">QIODevice::readLine</a>(), which
does not strip the newline at the end of the line.
<p>See also: <a href="qiodevice.html#d0">QIODevice::readLine</a>().
<p>Examples:
<a href="application-application-cpp.html#readLine">application/application.cpp</a>
<h3 class="fn">QTextStream&<a name="d1"></a>QTextStream::readRawBytes(char*s, uintlen)</h3>
<p>Reads <em>len</em> bytes from the stream into <em>e</em> s and returns a reference to
the stream.
<p>The buffer <em>s</em> must be preallocated.
<p>See also: <a href="qiodevice.html#c8">QIODevice::readBlock</a>().
<h3 class="fn">void<a name="d9"></a>QTextStream::reset()</h3>
<p>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>See also: <a href="qtextstream.html#d6">setf</a>(), <a href="qtextstream.html#e0">width</a>(), <a href="qtextstream.html#e2">fill</a>() and <a href="qtextstream.html#e4">precision</a>().
<h3 class="fn">void<a name="a6"></a>QTextStream::setDevice(<a href="qiodevice.html">QIODevice</a>*d)</h3>
<p>Sets the IO device to <em>d.</em>
<p>See also: <a href="qtextstream.html#a5">device</a>() and <a href="qtextstream.html#a7">unsetDevice</a>().
<h3 class="fn">int<a name="d6"></a>QTextStream::setf(intbits)</h3>
<p>Sets the stream flag bits <em>bits.</em>
Returns the previous stream flags.
<p>Equivalent to <code><a href="qtextstream.html#d4">flags</a>( flags() | bits )</code>.
<p>See also: setf() and <a href="qtextstream.html#d8">unsetf</a>().
<h3 class="fn">int<a name="d7"></a>QTextStream::setf(intbits, intmask)</h3>
<p>Sets the stream flag bits <em>bits</em> with a bit mask <em>mask.</em>
Returns the previous stream flags.
<p>Equivalent to <code><a href="qtextstream.html#d4">flags</a>( (flags() & ~mask) | (bits & mask) )</code>.
<p>See also: <a href="qtextstream.html#d6">setf</a>() and <a href="qtextstream.html#d8">unsetf</a>().
<h3 class="fn">void<a name="a7"></a>QTextStream::unsetDevice()</h3>
<p>Unsets the IO device. Equivalent to <a href="qtextstream.html#a6">setDevice</a>( 0 ).
<p>See also: <a href="qtextstream.html#a5">device</a>() and <a href="qtextstream.html#a6">setDevice</a>().
<h3 class="fn">int<a name="d8"></a>QTextStream::unsetf(intbits)</h3>
<p>Clears the stream flag bits <em>bits.</em>
Returns the previous stream flags.
<p>Equivalent to <code><a href="qtextstream.html#d4">flags</a>( flags() & ~mask )</code>.
<p>See also: <a href="qtextstream.html#d6">setf</a>().
<h3 class="fn">int<a name="e0"></a>QTextStream::width()const</h3>
<p>Returns the field width. The default value is 0.
<h3 class="fn">int<a name="e1"></a>QTextStream::width(intw)</h3>
<p>Sets the field width to <em>w.</em> Returns the previous field width.
<h3 class="fn">QTextStream&<a name="d2"></a>QTextStream::writeRawBytes(constchar*s, uintlen)</h3>
<p>Writes the <em>len</em> bytes from <em>s</em> to the stream and returns a reference to
the stream.
<p>See also: <a href="qiodevice.html#c9">QIODevice::writeBlock</a>().
<hr><p>
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This file is part of the <a href="index.html">Qt toolkit</a>,
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It was generated from the following files:
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<li>qtextstream.h: 1998/08/25
<li>qtextstream.cpp: 1998/07/03
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<td>Copyright 1999 Troll Tech<td><a href="trademarks.html">Trademarks</a>
<td align="right"><div align="right">Qt version 1.45</div>
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