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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="predef.reference.other_macros"></a><a class="link" href="other_macros.html" title="Other macros">Other macros</a> |
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| <span class="phrase"><a name="predef.reference.other_macros.boost_endian"></a></span><a class="link" href="other_macros.html#predef.reference.other_macros.boost_endian"><code class="computeroutput"><span class="identifier">BOOST_ENDIAN_</span><span class="special">*</span></code></a> |
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| <p> |
| Detection of endian memory ordering. There are four defined macros in this |
| header that define the various generally possible endian memory orderings: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">BOOST_ENDIAN_BIG_BYTE</span></code>, |
| byte-swapped big-endian. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">BOOST_ENDIAN_BIG_WORD</span></code>, |
| word-swapped big-endian. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">BOOST_ENDIAN_LITTLE_BYTE</span></code>, |
| byte-swapped little-endian. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">BOOST_ENDIAN_LITTLE_WORD</span></code>, |
| word-swapped little-endian. |
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| The detection is conservative in that it only identifies endianness that |
| it knows for certain. In particular bi-endianness is not indicated as is |
| it not practically possible to determine the endianness from anything but |
| an operating system provided header. And the currently known headers do not |
| define that programatic bi-endianness is available. |
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| <p> |
| This implementation is a compilation of various publicly available information |
| and acquired knowledge: |
| </p> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| The indispensable documentation of "Pre-defined Compiler Macros" |
| <a href="http://sourceforge.net/p/predef/wiki/Endianness" target="_top">Endianness</a>. |
| </li> |
| <li class="listitem"> |
| The various endian specifications available in the <a href="http://wikipedia.org/" target="_top">Wikipedia</a> |
| computer architecture pages. |
| </li> |
| <li class="listitem"> |
| Generally available searches for headers that define endianness. |
| </li> |
| </ol></div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2005, 2008-2014 Rene Rivera<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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