| 1 | // Copyright 2005 Caleb Epstein |
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| 2 | // Copyright 2006 John Maddock |
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| 3 | // Distributed under the Boost Software License, Version 1.0. (See accompany- |
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| 4 | // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | /* |
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| 7 | * Copyright (c) 1997 |
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| 8 | * Silicon Graphics Computer Systems, Inc. |
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| 9 | * |
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| 10 | * Permission to use, copy, modify, distribute and sell this software |
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| 11 | * and its documentation for any purpose is hereby granted without fee, |
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| 12 | * provided that the above copyright notice appear in all copies and |
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| 13 | * that both that copyright notice and this permission notice appear |
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| 14 | * in supporting documentation. Silicon Graphics makes no |
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| 15 | * representations about the suitability of this software for any |
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| 16 | * purpose. It is provided "as is" without express or implied warranty. |
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| 17 | */ |
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| 18 | |
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| 19 | /* |
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| 20 | * Copyright notice reproduced from <boost/detail/limits.hpp>, from |
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| 21 | * which this code was originally taken. |
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| 22 | * |
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| 23 | * Modified by Caleb Epstein to use <endian.h> with GNU libc and to |
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| 24 | * defined the BOOST_ENDIAN macro. |
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| 25 | */ |
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| 26 | |
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| 27 | #ifndef BOOST_DETAIL_ENDIAN_HPP |
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| 28 | #define BOOST_DETAIL_ENDIAN_HPP |
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| 29 | |
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| 30 | // GNU libc offers the helpful header <endian.h> which defines |
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| 31 | // __BYTE_ORDER |
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| 32 | |
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| 33 | #if defined (__GLIBC__) |
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| 34 | # include <endian.h> |
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| 35 | # if (__BYTE_ORDER == __LITTLE_ENDIAN) |
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| 36 | # define BOOST_LITTLE_ENDIAN |
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| 37 | # elif (__BYTE_ORDER == __BIG_ENDIAN) |
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| 38 | # define BOOST_BIG_ENDIAN |
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| 39 | # elif (__BYTE_ORDER == __PDP_ENDIAN) |
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| 40 | # define BOOST_PDP_ENDIAN |
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| 41 | # else |
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| 42 | # error Unknown machine endianness detected. |
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| 43 | # endif |
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| 44 | # define BOOST_BYTE_ORDER __BYTE_ORDER |
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| 45 | #elif defined(_BIG_ENDIAN) |
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| 46 | # define BOOST_BIG_ENDIAN |
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| 47 | # define BOOST_BYTE_ORDER 4321 |
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| 48 | #elif defined(_LITTLE_ENDIAN) |
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| 49 | # define BOOST_LITTLE_ENDIAN |
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| 50 | # define BOOST_BYTE_ORDER 1234 |
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| 51 | #elif defined(__sparc) || defined(__sparc__) \ |
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| 52 | || defined(_POWER) || defined(__powerpc__) \ |
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| 53 | || defined(__ppc__) || defined(__hpux) \ |
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| 54 | || defined(_MIPSEB) || defined(_POWER) \ |
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| 55 | || defined(__s390__) |
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| 56 | # define BOOST_BIG_ENDIAN |
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| 57 | # define BOOST_BYTE_ORDER 4321 |
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| 58 | #elif defined(__i386__) || defined(__alpha__) \ |
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| 59 | || defined(__ia64) || defined(__ia64__) \ |
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| 60 | || defined(_M_IX86) || defined(_M_IA64) \ |
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| 61 | || defined(_M_ALPHA) || defined(__amd64) \ |
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| 62 | || defined(__amd64__) || defined(_M_AMD64) \ |
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| 63 | || defined(__x86_64) || defined(__x86_64__) \ |
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| 64 | || defined(_M_X64) |
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| 65 | |
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| 66 | # define BOOST_LITTLE_ENDIAN |
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| 67 | # define BOOST_BYTE_ORDER 1234 |
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| 68 | #else |
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| 69 | # error The file boost/detail/endian.hpp needs to be set up for your CPU type. |
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| 70 | #endif |
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| 71 | |
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| 72 | |
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| 73 | #endif |
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