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<td >Qt 5.9</td><td ><a href="qtcore-index.html">Qt Core</a></td><td >&lt;QtEndian&gt; - Endian Conversion Functions</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h1 class="title">&lt;QtEndian&gt; - Endian Conversion Functions</h1>
<span class="subtitle"></span>
<!-- $$$<QtEndian>-brief -->
<p>The &lt;QtEndian&gt; header provides functions to convert between little and big endian representations of numbers. <a href="#details">More...</a></p>
<!-- @@@<QtEndian> -->
<ul>
</ul>
<a name="Functions"></a>
<h2 id="Functions">Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qFromBigEndian">qFromBigEndian</a></b>(T <i>src</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qFromBigEndian">qFromBigEndian</a></b>(const void *<i>src</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a></b>(T <i>src</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a></b>(const void *<i>src</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qToBigEndian">qToBigEndian</a></b>(T <i>src</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qToBigEndian">qToBigEndian</a></b>(T <i>src</i>, void *<i>dest</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qToLittleEndian">qToLittleEndian</a></b>(T <i>src</i>)</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtendian.html#qToLittleEndian">qToLittleEndian</a></b>(T <i>src</i>, void *<i>dest</i>)</td></tr>
</table></div>
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<div class="descr"> <a name="details"></a>
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<h2>Function Documentation</h2>
<!-- $$$qFromBigEndian[overload1]$$$qFromBigEndianT -->
<h3 class="fn" id="qFromBigEndian"><a name="qFromBigEndian"></a><span class="type">T</span> <span class="name">qFromBigEndian</span>(<span class="type">T</span> <i>src</i>)</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from big-endian byte order and returns the number in host byte order representation of that number. On CPU architectures where the host byte order is little-endian (such as x86) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in  Qt 4.3.</p>
<!-- @@@qFromBigEndian -->
<!-- $$$qFromBigEndian[overload1]$$$qFromBigEndianconstvoid* -->
<h3 class="fn" id="qFromBigEndian"><a name="qFromBigEndian"></a><span class="type">T</span> <span class="name">qFromBigEndian</span>(const <span class="type">void</span> *<i>src</i>)</h3>
<p>Reads a big-endian number from memory location <i>src</i> and returns the number in the host byte order representation. On CPU architectures where the host byte order is little-endian (such as x86) this will swap the byte order; otherwise it will just read from <i>src</i>.</p>
<p><b>Note: </b>Template type <code>T</code> can either be a qint16, qint32 or qint64. Other types of integers, e.g&#x2e;, qlong, are not applicable.</p><p><b>Note: </b>Since Qt 5.7, the type of the <i>src</i> parameter is a void pointer.</p><p>There are no data alignment constraints for <i>src</i>.</p>
<p>This function was introduced in  Qt 4.3.</p>
<p><b>See also </b><a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a>(), <a href="qtendian.html#qToBigEndian">qToBigEndian</a>(), and <a href="qtendian.html#qToLittleEndian">qToLittleEndian</a>().</p>
<!-- @@@qFromBigEndian -->
<!-- $$$qFromLittleEndian[overload1]$$$qFromLittleEndianT -->
<h3 class="fn" id="qFromLittleEndian"><a name="qFromLittleEndian"></a><span class="type">T</span> <span class="name">qFromLittleEndian</span>(<span class="type">T</span> <i>src</i>)</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from little-endian byte order and returns the number in host byte order representation of that number. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in  Qt 4.3.</p>
<!-- @@@qFromLittleEndian -->
<!-- $$$qFromLittleEndian[overload1]$$$qFromLittleEndianconstvoid* -->
<h3 class="fn" id="qFromLittleEndian"><a name="qFromLittleEndian"></a><span class="type">T</span> <span class="name">qFromLittleEndian</span>(const <span class="type">void</span> *<i>src</i>)</h3>
<p>Reads a little-endian number from memory location <i>src</i> and returns the number in the host byte order representation. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will swap the byte order; otherwise it will just read from <i>src</i>.</p>
<p><b>Note: </b>Template type <code>T</code> can either be a qint16, qint32 or qint64. Other types of integers, e.g&#x2e;, qlong, are not applicable.</p><p><b>Note: </b>Since Qt 5.7, the type of the <i>src</i> parameter is a void pointer.</p><p>There are no data alignment constraints for <i>src</i>.</p>
<p>This function was introduced in  Qt 4.3.</p>
<p><b>See also </b><a href="qtendian.html#qFromBigEndian">qFromBigEndian</a>(), <a href="qtendian.html#qToBigEndian">qToBigEndian</a>(), and <a href="qtendian.html#qToLittleEndian">qToLittleEndian</a>().</p>
<!-- @@@qFromLittleEndian -->
<!-- $$$qToBigEndian[overload1]$$$qToBigEndianT -->
<h3 class="fn" id="qToBigEndian"><a name="qToBigEndian"></a><span class="type">T</span> <span class="name">qToBigEndian</span>(<span class="type">T</span> <i>src</i>)</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from host byte order and returns the number in big-endian byte order representation of that number. On CPU architectures where the host byte order is little-endian (such as x86) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in  Qt 4.3.</p>
<!-- @@@qToBigEndian -->
<!-- $$$qToBigEndian[overload1]$$$qToBigEndianTvoid* -->
<h3 class="fn" id="qToBigEndian"><a name="qToBigEndian"></a><span class="type">void</span> <span class="name">qToBigEndian</span>(<span class="type">T</span> <i>src</i>, <span class="type">void</span> *<i>dest</i>)</h3>
<p>Writes the number <i>src</i> with template type <code>T</code> to the memory location at <i>dest</i> in big-endian byte order.</p>
<p>Note that template type <code>T</code> can only be an integer data type (signed or unsigned).</p>
<p>There are no data alignment constraints for <i>dest</i>.</p>
<p><b>Note: </b>Since Qt 5.7, the type of the <i>dest</i> parameter is a void pointer.</p><p>This function was introduced in  Qt 4.3.</p>
<p><b>See also </b><a href="qtendian.html#qFromBigEndian">qFromBigEndian</a>(), <a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a>(), and <a href="qtendian.html#qToLittleEndian">qToLittleEndian</a>().</p>
<!-- @@@qToBigEndian -->
<!-- $$$qToLittleEndian[overload1]$$$qToLittleEndianT -->
<h3 class="fn" id="qToLittleEndian"><a name="qToLittleEndian"></a><span class="type">T</span> <span class="name">qToLittleEndian</span>(<span class="type">T</span> <i>src</i>)</h3>
<p>This is an overloaded function.</p>
<p>Converts <i>src</i> from host byte order and returns the number in little-endian byte order representation of that number. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will return <i>src</i> with the byte order swapped; otherwise it will return <i>src</i> unmodified.</p>
<p>This function was introduced in  Qt 4.3.</p>
<!-- @@@qToLittleEndian -->
<!-- $$$qToLittleEndian[overload1]$$$qToLittleEndianTvoid* -->
<h3 class="fn" id="qToLittleEndian"><a name="qToLittleEndian"></a><span class="type">void</span> <span class="name">qToLittleEndian</span>(<span class="type">T</span> <i>src</i>, <span class="type">void</span> *<i>dest</i>)</h3>
<p>Writes the number <i>src</i> with template type <code>T</code> to the memory location at <i>dest</i> in little-endian byte order.</p>
<p>Note that template type <code>T</code> can only be an integer data type (signed or unsigned).</p>
<p>There are no data alignment constraints for <i>dest</i>.</p>
<p><b>Note: </b>Since Qt 5.7, the type of the <i>dest</i> parameter is a void pointer.</p><p>This function was introduced in  Qt 4.3.</p>
<p><b>See also </b><a href="qtendian.html#qFromBigEndian">qFromBigEndian</a>(), <a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a>(), and <a href="qtendian.html#qToBigEndian">qToBigEndian</a>().</p>
<!-- @@@qToLittleEndian -->
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