imgtools/imglib/boostlibrary/boost/detail/endian.hpp
author Jon Chatten
Mon, 08 Mar 2010 14:05:10 +0000
branchwip
changeset 349 a5741f22d0a5
parent 0 044383f39525
permissions -rw-r--r--
release note: Add support for FEATUREVARIANTSAFE in BV builds.
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// Copyright 2005 Caleb Epstein
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// Copyright 2006 John Maddock
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// Distributed under the Boost Software License, Version 1.0. (See accompany-
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// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/*
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 * Copyright (c) 1997
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 * Silicon Graphics Computer Systems, Inc.
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 *
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 * Permission to use, copy, modify, distribute and sell this software
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 * and its documentation for any purpose is hereby granted without fee,
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 * provided that the above copyright notice appear in all copies and
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 * that both that copyright notice and this permission notice appear
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 * in supporting documentation.  Silicon Graphics makes no
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 * representations about the suitability of this software for any
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 * purpose.  It is provided "as is" without express or implied warranty.
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 */
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/*
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 * Copyright notice reproduced from <boost/detail/limits.hpp>, from
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 * which this code was originally taken.
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 *
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 * Modified by Caleb Epstein to use <endian.h> with GNU libc and to
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 * defined the BOOST_ENDIAN macro.
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 */
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#ifndef BOOST_DETAIL_ENDIAN_HPP
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#define BOOST_DETAIL_ENDIAN_HPP
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// GNU libc offers the helpful header <endian.h> which defines
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// __BYTE_ORDER
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#if defined (__GLIBC__)
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# include <endian.h>
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# if (__BYTE_ORDER == __LITTLE_ENDIAN)
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#  define BOOST_LITTLE_ENDIAN
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# elif (__BYTE_ORDER == __BIG_ENDIAN)
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#  define BOOST_BIG_ENDIAN
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# elif (__BYTE_ORDER == __PDP_ENDIAN)
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#  define BOOST_PDP_ENDIAN
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# else
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#  error Unknown machine endianness detected.
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# endif
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# define BOOST_BYTE_ORDER __BYTE_ORDER
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#elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
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# define BOOST_BIG_ENDIAN
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# define BOOST_BYTE_ORDER 4321
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#elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
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# define BOOST_LITTLE_ENDIAN
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# define BOOST_BYTE_ORDER 1234
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#elif defined(__sparc) || defined(__sparc__) \
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   || defined(_POWER) || defined(__powerpc__) \
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   || defined(__ppc__) || defined(__hpux) \
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   || defined(_MIPSEB) || defined(_POWER) \
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   || defined(__s390__)
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# define BOOST_BIG_ENDIAN
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# define BOOST_BYTE_ORDER 4321
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#elif defined(__i386__) || defined(__alpha__) \
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   || defined(__ia64) || defined(__ia64__) \
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   || defined(_M_IX86) || defined(_M_IA64) \
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   || defined(_M_ALPHA) || defined(__amd64) \
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   || defined(__amd64__) || defined(_M_AMD64) \
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   || defined(__x86_64) || defined(__x86_64__) \
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   || defined(_M_X64) || defined(__bfin__)
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# define BOOST_LITTLE_ENDIAN
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# define BOOST_BYTE_ORDER 1234
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#else
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# error The file boost/detail/endian.hpp needs to be set up for your CPU type.
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#endif
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#endif