453 lines
23 KiB
HTML
453 lines
23 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>sd-reader: Byteordering</title>
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<div id="projectname">sd-reader
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</div>
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</td>
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<!-- Generated by Doxygen 1.7.6.1 -->
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<div id="navrow1" class="tabs">
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<ul class="tablist">
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<li><a href="index.html"><span>Main Page</span></a></li>
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<li><a href="modules.html"><span>Modules</span></a></li>
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<li><a href="annotated.html"><span>Data Structures</span></a></li>
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<li><a href="files.html"><span>Files</span></a></li>
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</ul>
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<div class="header">
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<div class="summary">
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<a href="#files">Files</a> |
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<a href="#define-members">Defines</a> |
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<a href="#func-members">Functions</a> </div>
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<div class="headertitle">
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<div class="title">Byteordering</div> </div>
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</div><!--header-->
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<div class="contents">
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<p>Architecture-dependent handling of byte-ordering.
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<a href="#details">More...</a></p>
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<table class="memberdecls">
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<tr><td colspan="2"><h2><a name="files"></a>
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Files</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="byteordering_8c.html">byteordering.c</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight"><p>Byte-order handling implementation (license: GPLv2 or LGPLv2.1) </p>
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<br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="byteordering_8h.html">byteordering.h</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight"><p>Byte-order handling header (license: GPLv2 or LGPLv2.1) </p>
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<br/></td></tr>
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<tr><td colspan="2"><h2><a name="define-members"></a>
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Defines</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gafe6b840e18479649f2f279510841b725">HTOL16</a>(val)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 16-bit integer from host byte order to little-endian byte order. <a href="#gafe6b840e18479649f2f279510841b725"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#ga4721d1b0a8ce813e569f1f50e28cbd49">HTOL32</a>(val)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 32-bit integer from host byte order to little-endian byte order. <a href="#ga4721d1b0a8ce813e569f1f50e28cbd49"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#ga5c0de5da892f4416d2e6a08a4313dd43">LTOH16</a>(val)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 16-bit integer from little-endian byte order to host byte order. <a href="#ga5c0de5da892f4416d2e6a08a4313dd43"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gad6a95c92a285d197c78cd0c680266682">LTOH32</a>(val)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 32-bit integer from little-endian byte order to host byte order. <a href="#gad6a95c92a285d197c78cd0c680266682"></a><br/></td></tr>
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<tr><td colspan="2"><h2><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#ga093e2aa18385b96e30198e9ec902c3a8">read16</a> (const uint8_t *p)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Reads a 16-bit integer from memory in little-endian byte order. <a href="#ga093e2aa18385b96e30198e9ec902c3a8"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gab7db40b834553f07d18076ac05c85887">read32</a> (const uint8_t *p)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Reads a 32-bit integer from memory in little-endian byte order. <a href="#gab7db40b834553f07d18076ac05c85887"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#ga101b4c983b1af68a4886bc4d1cce7cfd">write16</a> (uint8_t *p, uint16_t i)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Writes a 16-bit integer into memory in little-endian byte order. <a href="#ga101b4c983b1af68a4886bc4d1cce7cfd"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gae4a413d089ca0706b9d0a66c19163e86">write32</a> (uint8_t *p, uint32_t i)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Writes a 32-bit integer into memory in little-endian byte order. <a href="#gae4a413d089ca0706b9d0a66c19163e86"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gab0e4bd12631fd8f1c1566b53cc5d701b">htol16</a> (uint16_t h)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 16-bit integer from host byte order to little-endian byte order. <a href="#gab0e4bd12631fd8f1c1566b53cc5d701b"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gad99f704c5d785948044d1a0a81ffdd78">htol32</a> (uint32_t h)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 32-bit integer from host byte order to little-endian byte order. <a href="#gad99f704c5d785948044d1a0a81ffdd78"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#ga956619f7d735460ad335c33399a5bfd0">ltoh16</a> (uint16_t l)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 16-bit integer from little-endian byte order to host byte order. <a href="#ga956619f7d735460ad335c33399a5bfd0"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__byteordering.html#gaa6a3e9e41e5a7fa0c61a9b7355135977">ltoh32</a> (uint32_t l)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts a 32-bit integer from little-endian byte order to host byte order. <a href="#gaa6a3e9e41e5a7fa0c61a9b7355135977"></a><br/></td></tr>
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</table>
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
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<p>Architecture-dependent handling of byte-ordering. </p>
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<hr/><h2>Define Documentation</h2>
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<a class="anchor" id="gafe6b840e18479649f2f279510841b725"></a><!-- doxytag: member="byteordering.h::HTOL16" ref="gafe6b840e18479649f2f279510841b725" args="(val)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">#define <a class="el" href="group__byteordering.html#gafe6b840e18479649f2f279510841b725">HTOL16</a></td>
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<td>(</td>
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<td class="paramtype"> </td>
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<td class="paramname">val</td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 16-bit integer from host byte order to little-endian byte order. </p>
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<p>Use this macro for compile time constants only. For variable values use the function <a class="el" href="group__byteordering.html#gab0e4bd12631fd8f1c1566b53cc5d701b" title="Converts a 16-bit integer from host byte order to little-endian byte order.">htol16()</a> instead. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">val</td><td>A 16-bit integer in host byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 16-bit integer converted to little-endian byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ga4721d1b0a8ce813e569f1f50e28cbd49"></a><!-- doxytag: member="byteordering.h::HTOL32" ref="ga4721d1b0a8ce813e569f1f50e28cbd49" args="(val)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">#define <a class="el" href="group__byteordering.html#ga4721d1b0a8ce813e569f1f50e28cbd49">HTOL32</a></td>
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<td>(</td>
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<td class="paramtype"> </td>
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<td class="paramname">val</td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 32-bit integer from host byte order to little-endian byte order. </p>
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<p>Use this macro for compile time constants only. For variable values use the function <a class="el" href="group__byteordering.html#gad99f704c5d785948044d1a0a81ffdd78" title="Converts a 32-bit integer from host byte order to little-endian byte order.">htol32()</a> instead. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">val</td><td>A 32-bit integer in host byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 32-bit integer converted to little-endian byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ga5c0de5da892f4416d2e6a08a4313dd43"></a><!-- doxytag: member="byteordering.h::LTOH16" ref="ga5c0de5da892f4416d2e6a08a4313dd43" args="(val)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">#define <a class="el" href="group__byteordering.html#ga5c0de5da892f4416d2e6a08a4313dd43">LTOH16</a></td>
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<td>(</td>
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<td class="paramtype"> </td>
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<td class="paramname">val</td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 16-bit integer from little-endian byte order to host byte order. </p>
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<p>Use this macro for compile time constants only. For variable values use the function <a class="el" href="group__byteordering.html#ga956619f7d735460ad335c33399a5bfd0" title="Converts a 16-bit integer from little-endian byte order to host byte order.">ltoh16()</a> instead. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">val</td><td>A 16-bit integer in little-endian byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 16-bit integer converted to host byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="gad6a95c92a285d197c78cd0c680266682"></a><!-- doxytag: member="byteordering.h::LTOH32" ref="gad6a95c92a285d197c78cd0c680266682" args="(val)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">#define <a class="el" href="group__byteordering.html#gad6a95c92a285d197c78cd0c680266682">LTOH32</a></td>
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<td>(</td>
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<td class="paramtype"> </td>
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<td class="paramname">val</td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 32-bit integer from little-endian byte order to host byte order. </p>
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<p>Use this macro for compile time constants only. For variable values use the function <a class="el" href="group__byteordering.html#gaa6a3e9e41e5a7fa0c61a9b7355135977" title="Converts a 32-bit integer from little-endian byte order to host byte order.">ltoh32()</a> instead. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">val</td><td>A 32-bit integer in little-endian byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 32-bit integer converted to host byte order. </dd></dl>
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</div>
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</div>
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<hr/><h2>Function Documentation</h2>
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<a class="anchor" id="gab0e4bd12631fd8f1c1566b53cc5d701b"></a><!-- doxytag: member="byteordering.h::htol16" ref="gab0e4bd12631fd8f1c1566b53cc5d701b" args="(uint16_t h)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">uint16_t <a class="el" href="group__byteordering.html#gab0e4bd12631fd8f1c1566b53cc5d701b">htol16</a> </td>
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<td>(</td>
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<td class="paramtype">uint16_t </td>
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<td class="paramname"><em>h</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 16-bit integer from host byte order to little-endian byte order. </p>
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<p>Use this function on variable values instead of the macro <a class="el" href="group__byteordering.html#gafe6b840e18479649f2f279510841b725" title="Converts a 16-bit integer from host byte order to little-endian byte order.">HTOL16()</a>. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">h</td><td>A 16-bit integer in host byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 16-bit integer converted to little-endian byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="gad99f704c5d785948044d1a0a81ffdd78"></a><!-- doxytag: member="byteordering.h::htol32" ref="gad99f704c5d785948044d1a0a81ffdd78" args="(uint32_t h)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">uint32_t <a class="el" href="group__byteordering.html#gad99f704c5d785948044d1a0a81ffdd78">htol32</a> </td>
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<td>(</td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>h</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 32-bit integer from host byte order to little-endian byte order. </p>
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<p>Use this function on variable values instead of the macro <a class="el" href="group__byteordering.html#ga4721d1b0a8ce813e569f1f50e28cbd49" title="Converts a 32-bit integer from host byte order to little-endian byte order.">HTOL32()</a>. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">h</td><td>A 32-bit integer in host byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 32-bit integer converted to little-endian byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ga956619f7d735460ad335c33399a5bfd0"></a><!-- doxytag: member="byteordering.h::ltoh16" ref="ga956619f7d735460ad335c33399a5bfd0" args="(uint16_t l)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">uint16_t <a class="el" href="group__byteordering.html#ga956619f7d735460ad335c33399a5bfd0">ltoh16</a> </td>
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<td>(</td>
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<td class="paramtype">uint16_t </td>
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<td class="paramname"><em>l</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Converts a 16-bit integer from little-endian byte order to host byte order. </p>
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<p>Use this function on variable values instead of the macro <a class="el" href="group__byteordering.html#ga5c0de5da892f4416d2e6a08a4313dd43" title="Converts a 16-bit integer from little-endian byte order to host byte order.">LTOH16()</a>. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">l</td><td>A 16-bit integer in little-endian byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 16-bit integer converted to host byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="gaa6a3e9e41e5a7fa0c61a9b7355135977"></a><!-- doxytag: member="byteordering.h::ltoh32" ref="gaa6a3e9e41e5a7fa0c61a9b7355135977" args="(uint32_t l)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">uint32_t <a class="el" href="group__byteordering.html#gaa6a3e9e41e5a7fa0c61a9b7355135977">ltoh32</a> </td>
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<td>(</td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>l</em></td><td>)</td>
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<td></td>
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<div class="memdoc">
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<p>Converts a 32-bit integer from little-endian byte order to host byte order. </p>
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<p>Use this function on variable values instead of the macro <a class="el" href="group__byteordering.html#gad6a95c92a285d197c78cd0c680266682" title="Converts a 32-bit integer from little-endian byte order to host byte order.">LTOH32()</a>. This saves code size.</p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">l</td><td>A 32-bit integer in little-endian byte order. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The given 32-bit integer converted to host byte order. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ga093e2aa18385b96e30198e9ec902c3a8"></a><!-- doxytag: member="byteordering.c::read16" ref="ga093e2aa18385b96e30198e9ec902c3a8" args="(const uint8_t *p)" -->
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<div class="memitem">
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<td class="memname">uint16_t <a class="el" href="group__byteordering.html#ga093e2aa18385b96e30198e9ec902c3a8">read16</a> </td>
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<td>(</td>
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<td class="paramtype">const uint8_t * </td>
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<td class="paramname"><em>p</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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<div class="memdoc">
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<p>Reads a 16-bit integer from memory in little-endian byte order. </p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">p</td><td>Pointer from where to read the integer. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The 16-bit integer read from memory. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="gab7db40b834553f07d18076ac05c85887"></a><!-- doxytag: member="byteordering.c::read32" ref="gab7db40b834553f07d18076ac05c85887" args="(const uint8_t *p)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">uint32_t <a class="el" href="group__byteordering.html#gab7db40b834553f07d18076ac05c85887">read32</a> </td>
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<td>(</td>
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<td class="paramtype">const uint8_t * </td>
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<td class="paramname"><em>p</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Reads a 32-bit integer from memory in little-endian byte order. </p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">p</td><td>Pointer from where to read the integer. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The 32-bit integer read from memory. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ga101b4c983b1af68a4886bc4d1cce7cfd"></a><!-- doxytag: member="byteordering.c::write16" ref="ga101b4c983b1af68a4886bc4d1cce7cfd" args="(uint8_t *p, uint16_t i)" -->
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<div class="memitem">
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<div class="memproto">
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<tr>
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<td class="memname">void <a class="el" href="group__byteordering.html#ga101b4c983b1af68a4886bc4d1cce7cfd">write16</a> </td>
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<td>(</td>
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<td class="paramtype">uint8_t * </td>
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<td class="paramname"><em>p</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint16_t </td>
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<td class="paramname"><em>i</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Writes a 16-bit integer into memory in little-endian byte order. </p>
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<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">p</td><td>Pointer where to write the integer to. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">i</td><td>The 16-bit integer to write. </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<a class="anchor" id="gae4a413d089ca0706b9d0a66c19163e86"></a><!-- doxytag: member="byteordering.c::write32" ref="gae4a413d089ca0706b9d0a66c19163e86" args="(uint8_t *p, uint32_t i)" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">void <a class="el" href="group__byteordering.html#gae4a413d089ca0706b9d0a66c19163e86">write32</a> </td>
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<td>(</td>
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<td class="paramtype">uint8_t * </td>
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<td class="paramname"><em>p</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>i</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div>
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<div class="memdoc">
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<p>Writes a 32-bit integer into memory in little-endian byte order. </p>
|
|
<dl class="params"><dt><b>Parameters:</b></dt><dd>
|
|
<table class="params">
|
|
<tr><td class="paramdir">[in]</td><td class="paramname">p</td><td>Pointer where to write the integer to. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">i</td><td>The 32-bit integer to write. </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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</div><!-- contents -->
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