1 // Copyright 2005 Caleb Epstein
2 // Copyright 2006 John Maddock
3 // Copyright 2010 Rene Rivera
4 // Distributed under the Boost Software License, Version 1.0. (See accompany-
5 // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 
7 /*
8  * Copyright (c) 1997
9  * Silicon Graphics Computer Systems, Inc.
10  *
11  * Permission to use, copy, modify, distribute and sell this software
12  * and its documentation for any purpose is hereby granted without fee,
13  * provided that the above copyright notice appear in all copies and
14  * that both that copyright notice and this permission notice appear
15  * in supporting documentation.  Silicon Graphics makes no
16  * representations about the suitability of this software for any
17  * purpose.  It is provided "as is" without express or implied warranty.
18  */
19 
20 /*
21  * Copyright notice reproduced from <boost/detail/limits.hpp>, from
22  * which this code was originally taken.
23  *
24  * Modified by Caleb Epstein to use <endian.h> with GNU libc and to
25  * defined the BOOST_ENDIAN macro.
26  */
27 
28 #ifndef BOOST_DETAIL_ENDIAN_HPP
29 #define BOOST_DETAIL_ENDIAN_HPP
30 
31 // GNU libc offers the helpful header <endian.h> which defines
32 // __BYTE_ORDER
33 
34 #if defined (__GLIBC__) || defined(__ANDROID__)
35 # include <endian.h>
36 # if (__BYTE_ORDER == __LITTLE_ENDIAN)
37 #  define BOOST_LITTLE_ENDIAN
38 # elif (__BYTE_ORDER == __BIG_ENDIAN)
39 #  define BOOST_BIG_ENDIAN
40 # elif (__BYTE_ORDER == __PDP_ENDIAN)
41 #  define BOOST_PDP_ENDIAN
42 # else
43 #  error Unknown machine endianness detected.
44 # endif
45 # define BOOST_BYTE_ORDER __BYTE_ORDER
46 #elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN) || \
47     defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__) || \
48     defined(_STLP_BIG_ENDIAN) && !defined(_STLP_LITTLE_ENDIAN)
49 # define BOOST_BIG_ENDIAN
50 # define BOOST_BYTE_ORDER 4321
51 #elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN) || \
52     defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__) || \
53     defined(_STLP_LITTLE_ENDIAN) && !defined(_STLP_BIG_ENDIAN)
54 # define BOOST_LITTLE_ENDIAN
55 # define BOOST_BYTE_ORDER 1234
56 #elif defined(__sparc) || defined(__sparc__) \
57    || defined(_POWER) || defined(__powerpc__) \
58    || defined(__ppc__) || defined(__hpux) || defined(__hppa) \
59    || defined(_MIPSEB) || defined(_POWER) \
60    || defined(__s390__)
61 # define BOOST_BIG_ENDIAN
62 # define BOOST_BYTE_ORDER 4321
63 #elif defined(__i386__) || defined(__alpha__) \
64    || defined(__ia64) || defined(__ia64__) \
65    || defined(_M_IX86) || defined(_M_IA64) \
66    || defined(_M_ALPHA) || defined(__amd64) \
67    || defined(__amd64__) || defined(_M_AMD64) \
68    || defined(__x86_64) || defined(__x86_64__) \
69    || defined(_M_X64) || defined(__bfin__)
70 
71 # define BOOST_LITTLE_ENDIAN
72 # define BOOST_BYTE_ORDER 1234
73 #else
74 # error The file boost/detail/endian.hpp needs to be set up for your CPU type.
75 #endif
76 
77 
78 #endif
79