source: NonGTP/Boost/boost/detail/endian.hpp @ 857

Revision 857, 1.9 KB checked in by igarcia, 19 years ago (diff)
Line 
1/*
2 * Copyright (c) 1997
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Permission to use, copy, modify, distribute and sell this software
6 * and its documentation for any purpose is hereby granted without fee,
7 * provided that the above copyright notice appear in all copies and
8 * that both that copyright notice and this permission notice appear
9 * in supporting documentation.  Silicon Graphics makes no
10 * representations about the suitability of this software for any
11 * purpose.  It is provided "as is" without express or implied warranty.
12 */
13
14/*
15 * Copyright notice reproduced from <boost/detail/limits.hpp>, from
16 * which this code was originally taken.
17 *
18 * Modified by Caleb Epstein to use <endian.h> with GNU libc and to
19 * defined the BOOST_ENDIAN macro.
20 */
21
22#ifndef BOOST_DETAIL_ENDIAN_HPP
23#define BOOST_DETAIL_ENDIAN_HPP
24
25// GNU libc offers the helpful header <endian.h> which defines
26// __BYTE_ORDER
27
28#if defined (__GLIBC__)
29# include <endian.h>
30# if (__BYTE_ORDER == __LITTLE_ENDIAN)
31#  define BOOST_LITTLE_ENDIAN
32# elif (__BYTE_ORDER == __BIG_ENDIAN)
33#  define BOOST_BIG_ENDIAN
34# elif (__BYTE_ORDER == __PDP_ENDIAN)
35#  define BOOST_PDP_ENDIAN
36# else
37#  error Unknown machine endianness detected.
38# endif
39# define BOOST_BYTE_ORDER __BYTE_ORDER
40#elif defined(__sparc) || defined(__sparc__) \
41   || defined(_POWER) || defined(__powerpc__) \
42   || defined(__ppc__) || defined(__hppa) \
43   || defined(_MIPSEB) || defined(_POWER) \
44   || defined(__s390__)
45# define BOOST_BIG_ENDIAN
46# define BOOST_BYTE_ORDER 4321
47#elif defined(__i386__) || defined(__alpha__) \
48   || defined(__ia64) || defined(__ia64__) \
49   || defined(_M_IX86) || defined(_M_IA64) \
50   || defined(_M_ALPHA)
51# define BOOST_LITTLE_ENDIAN
52# define BOOST_BYTE_ORDER 1234
53#else
54# error The file boost/detail/endian.hpp needs to be set up for your CPU type.
55#endif
56
57
58#endif
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