ByteOrderDefine.h

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//
//
/*
    Copyright (C) 2000- 2009, Hammersmith Imanet Ltd
    This file is part of STIR.
 
    SPDX-License-Identifier: Apache-2.0
 
    See STIR/LICENSE.txt for details
*/
 
#include "stir/common.h"
 
START_NAMESPACE_STIR
 
// currently checked by asserts()
// partially from https://stackoverflow.com/a/27054190
#if defined(BIG_ENDIAN_BYTE_ORDER_FROM_CMAKE)         /* variable set via CMake in stir/config.h */                              \
    || (!defined(LITTLE_ENDIAN_BYTE_ORDER_FROM_CMAKE) /* variable set via CMake in stir/config.h */                              \
        && ((!defined(__alpha) && (!defined(_WIN32) || defined(_M_PPC) || defined(_M_MPPC)) && !defined(__i386__)                \
             && !defined(__i486__) && !defined(__i586__) && !defined(__i686__) && !defined(__i786__) && !defined(__i886__)       \
             && !defined(__k6__) && !defined(__athlon__) && !defined(__x86_64__) && !defined(__k6__))                            \
            || (defined(__MSL__) && !defined(__LITTLE_ENDIAN)) || (defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN)        \
            || (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) /* gcc */) || defined(__BIG_ENDIAN__)))
#  define STIRIsNativeByteOrderBigEndian 1
#  define STIRIsNativeByteOrderLittleEndian 0
#else
#  define STIRIsNativeByteOrderBigEndian 0
#  define STIRIsNativeByteOrderLittleEndian 1
#endif


 
END_NAMESPACE_STIR