2022-10-27 23:51:56 +03:00
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// Copy fron boost 1.43.0
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// Copyright 2005 Caleb Epstein
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// Copyright 2006 John Maddock
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// Distributed under the Boost Software License, Version 1.0. (See accompany-
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// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/*
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* Copyright (c) 1997
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/*
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* Copyright notice reproduced from <boost/detail/limits.hpp>, from
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* which this code was originally taken.
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*
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* Modified by Caleb Epstein to use <endian.h> with GNU libc and to
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* defined the BOOST_ENDIAN macro.
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*/
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#ifndef BOOST_DETAIL_ENDIAN_HPP
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#define BOOST_DETAIL_ENDIAN_HPP
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// GNU libc offers the helpful header <endian.h> which defines
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// __BYTE_ORDER
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2023-05-11 22:42:20 +03:00
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#if defined(__GLIBC__)
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#include <endian.h>
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#if (__BYTE_ORDER == __LITTLE_ENDIAN)
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#define BOOST_LITTLE_ENDIAN
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#elif (__BYTE_ORDER == __BIG_ENDIAN)
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#define BOOST_BIG_ENDIAN
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#elif (__BYTE_ORDER == __PDP_ENDIAN)
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#define BOOST_PDP_ENDIAN
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#else
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2022-11-16 17:16:49 +03:00
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// Failsafe
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2023-05-11 22:42:20 +03:00
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#define BOOST_LITTLE_ENDIAN
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#endif
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#define BOOST_BYTE_ORDER __BYTE_ORDER
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2022-10-27 23:51:56 +03:00
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#elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
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2023-05-11 22:42:20 +03:00
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#define BOOST_BIG_ENDIAN
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#define BOOST_BYTE_ORDER 4321
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2022-10-27 23:51:56 +03:00
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#elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
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2023-05-11 22:42:20 +03:00
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#define BOOST_LITTLE_ENDIAN
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#define BOOST_BYTE_ORDER 1234
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2022-11-16 17:16:49 +03:00
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// https://developer.arm.com/documentation/dui0491/i/Compiler-specific-Features/Predefined-macros
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2023-05-11 22:42:20 +03:00
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#elif defined(__sparc) || defined(__sparc__) || defined(_POWER) || \
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defined(__powerpc__) || defined(__ppc__) || defined(__hpux) || \
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defined(__hppa) || defined(_MIPSEB) || defined(_POWER) || \
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defined(__s390__) || defined(__ARMEB__) || defined(__AARCH64EB__) || \
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defined(__BIG_ENDIAN) || defined(__ARM_BIG_ENDIAN)
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#define BOOST_BIG_ENDIAN
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#define BOOST_BYTE_ORDER 4321
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#elif defined(__i386__) || defined(__alpha__) || defined(__ia64) || \
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defined(__ia64__) || defined(_M_IX86) || defined(_M_IA64) || \
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defined(_M_ALPHA) || defined(__amd64) || defined(__amd64__) || \
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defined(_M_AMD64) || defined(__x86_64) || defined(__x86_64__) || \
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defined(_M_X64) || defined(__bfin__) || defined(__ARMEL__) || \
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defined(__AARCH64EL__) || defined(__arm64__) || defined(__arm__)
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#define BOOST_LITTLE_ENDIAN
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#define BOOST_BYTE_ORDER 1234
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2022-10-27 23:51:56 +03:00
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#else
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2022-11-16 17:16:49 +03:00
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// Failsafe
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2023-05-11 22:42:20 +03:00
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#define BOOST_LITTLE_ENDIAN
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#define BOOST_BYTE_ORDER 1234
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2022-11-16 17:16:49 +03:00
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2022-10-27 23:51:56 +03:00
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#endif
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#endif
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