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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 |