unicorn/tests/unit/endian.h

// Copy fron boost 1.43.0

// Copyright 2005 Caleb Epstein
// Copyright 2006 John Maddock
// Distributed under the Boost Software License, Version 1.0. (See accompany-
// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

/*
 * Copyright (c) 1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

/*
 * Copyright notice reproduced from <boost/detail/limits.hpp>, from
 * which this code was originally taken.
 *
 * Modified by Caleb Epstein to use <endian.h> with GNU libc and to
 * defined the BOOST_ENDIAN macro.
 */

#ifndef BOOST_DETAIL_ENDIAN_HPP
#define BOOST_DETAIL_ENDIAN_HPP

// GNU libc offers the helpful header <endian.h> which defines
// __BYTE_ORDER

#if defined(__GLIBC__)
#include <endian.h>
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
#define BOOST_LITTLE_ENDIAN
#elif (__BYTE_ORDER == __BIG_ENDIAN)
#define BOOST_BIG_ENDIAN
#elif (__BYTE_ORDER == __PDP_ENDIAN)
#define BOOST_PDP_ENDIAN
#else
// Failsafe
#define BOOST_LITTLE_ENDIAN
#endif
#define BOOST_BYTE_ORDER __BYTE_ORDER
#elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
#define BOOST_BIG_ENDIAN
#define BOOST_BYTE_ORDER 4321
#elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
#define BOOST_LITTLE_ENDIAN
#define BOOST_BYTE_ORDER 1234
// https://developer.arm.com/documentation/dui0491/i/Compiler-specific-Features/Predefined-macros
#elif defined(__sparc) || defined(__sparc__) || defined(_POWER) ||             \
    defined(__powerpc__) || defined(__ppc__) || defined(__hpux) ||             \
    defined(__hppa) || defined(_MIPSEB) || defined(_POWER) ||                  \
    defined(__s390__) || defined(__ARMEB__) || defined(__AARCH64EB__) ||       \
    defined(__BIG_ENDIAN) || defined(__ARM_BIG_ENDIAN)
#define BOOST_BIG_ENDIAN
#define BOOST_BYTE_ORDER 4321
#elif defined(__i386__) || defined(__alpha__) || defined(__ia64) ||            \
    defined(__ia64__) || defined(_M_IX86) || defined(_M_IA64) ||               \
    defined(_M_ALPHA) || defined(__amd64) || defined(__amd64__) ||             \
    defined(_M_AMD64) || defined(__x86_64) || defined(__x86_64__) ||           \
    defined(_M_X64) || defined(__bfin__) || defined(__ARMEL__) ||              \
    defined(__AARCH64EL__) || defined(__arm64__) || defined(__arm__)
#define BOOST_LITTLE_ENDIAN
#define BOOST_BYTE_ORDER 1234
#else

// Failsafe
#define BOOST_LITTLE_ENDIAN
#define BOOST_BYTE_ORDER 1234

#endif

#endif