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