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<title>Qt 4.6: <QtEndian> - Endian Conversion Functions</title>
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<td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td>
<td width="1"> </td><td class="postheader" 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="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title"><QtEndian> - Endian Conversion Functions<br /><span class="subtitle"></span>
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<p>The <QtEndian> header provides functions to convert between little and big endian representations of numbers. <a href="#details">More...</a></p>
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<h2>Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top">T </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qFromBigEndian">qFromBigEndian</a></b> ( const uchar * <i>src</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">T </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qFromBigEndian-2">qFromBigEndian</a></b> ( T <i>src</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">T </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a></b> ( const uchar * <i>src</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">T </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qFromLittleEndian-2">qFromLittleEndian</a></b> ( T <i>src</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qToBigEndian">qToBigEndian</a></b> ( T <i>src</i>, uchar * <i>dest</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">T </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qToBigEndian-2">qToBigEndian</a></b> ( T <i>src</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qToLittleEndian">qToLittleEndian</a></b> ( T <i>src</i>, uchar * <i>dest</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">T </td><td class="memItemRight" valign="bottom"><b><a href="qtendian.html#qToLittleEndian-2">qToLittleEndian</a></b> ( T <i>src</i> )</td></tr>
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<h2>Function Documentation</h2>
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<h3 class="fn"><a name="qFromBigEndian"></a>T qFromBigEndian ( const <a href="qtglobal.html#uchar-typedef">uchar</a> * <i>src</i> )</h3>
<p>Reads a big-endian number from memory location <i>src</i> and returns the number in the host byte order representation. On CPU architectures where the host byte order is little-endian (such as x86) this will swap the byte order; otherwise it will just read from <i>src</i>.</p>
<p><b>Note:</b> Template type <tt>T</tt> can either be a qint16, qint32 or qint64. Other types of integers, e.g., qlong, are not applicable.</p>
<p>There are no data alignment constraints for <i>src</i>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p>See also <a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a>(), <a href="qtendian.html#qToBigEndian">qToBigEndian</a>(), and <a href="qtendian.html#qToLittleEndian">qToLittleEndian</a>().</p>
<h3 class="fn"><a name="qFromBigEndian-2"></a>T qFromBigEndian ( T <i>src</i> )</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from big-endian byte order and returns the number in host byte order representation of that number. On CPU architectures where the host byte order is little-endian (such as x86) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in Qt 4.3.</p>
<a name="//apple_ref/cpp/func//qFromLittleEndian"></a>
<h3 class="fn"><a name="qFromLittleEndian"></a>T qFromLittleEndian ( const <a href="qtglobal.html#uchar-typedef">uchar</a> * <i>src</i> )</h3>
<p>Reads a little-endian number from memory location <i>src</i> and returns the number in the host byte order representation. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will swap the byte order; otherwise it will just read from <i>src</i>.</p>
<p><b>Note:</b> Template type <tt>T</tt> can either be a qint16, qint32 or qint64. Other types of integers, e.g., qlong, are not applicable.</p>
<p>There are no data alignment constraints for <i>src</i>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p>See also <a href="qtendian.html#qFromBigEndian">qFromBigEndian</a>(), <a href="qtendian.html#qToBigEndian">qToBigEndian</a>(), and <a href="qtendian.html#qToLittleEndian">qToLittleEndian</a>().</p>
<h3 class="fn"><a name="qFromLittleEndian-2"></a>T qFromLittleEndian ( T <i>src</i> )</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from little-endian byte order and returns the number in host byte order representation of that number. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in Qt 4.3.</p>
<a name="//apple_ref/cpp/func//qToBigEndian"></a>
<h3 class="fn"><a name="qToBigEndian"></a>void qToBigEndian ( T <i>src</i>, <a href="qtglobal.html#uchar-typedef">uchar</a> * <i>dest</i> )</h3>
<p>Writes the number <i>src</i> with template type <tt>T</tt> to the memory location at <i>dest</i> in big-endian byte order.</p>
<p>Note that template type <tt>T</tt> can only be an integer data type (signed or unsigned).</p>
<p>There are no data alignment constraints for <i>dest</i>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p>See also <a href="qtendian.html#qFromBigEndian">qFromBigEndian</a>(), <a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a>(), and <a href="qtendian.html#qToLittleEndian">qToLittleEndian</a>().</p>
<h3 class="fn"><a name="qToBigEndian-2"></a>T qToBigEndian ( T <i>src</i> )</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from host byte order and returns the number in big-endian byte order representation of that number. On CPU architectures where the host byte order is little-endian (such as x86) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in Qt 4.3.</p>
<a name="//apple_ref/cpp/func//qToLittleEndian"></a>
<h3 class="fn"><a name="qToLittleEndian"></a>void qToLittleEndian ( T <i>src</i>, <a href="qtglobal.html#uchar-typedef">uchar</a> * <i>dest</i> )</h3>
<p>Writes the number <i>src</i> with template type <tt>T</tt> to the memory location at <i>dest</i> in little-endian byte order.</p>
<p>Note that template type <tt>T</tt> can only be an integer data type (signed or unsigned).</p>
<p>There are no data alignment constraints for <i>dest</i>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p>See also <a href="qtendian.html#qFromBigEndian">qFromBigEndian</a>(), <a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a>(), and <a href="qtendian.html#qToBigEndian">qToBigEndian</a>().</p>
<h3 class="fn"><a name="qToLittleEndian-2"></a>T qToLittleEndian ( T <i>src</i> )</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from host byte order and returns the number in little-endian byte order representation of that number. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in Qt 4.3.</p>
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