endianness.h

#ifndef _ENDIANNESS_H_
#define _ENDIANNESS_H_
#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN || \
    defined(__BIG_ENDIAN__) ||                               \
    defined(__ARMEB__) ||                                    \
    defined(__THUMBEB__) ||                                  \
    defined(__AARCH64EB__) ||                                \
    defined(_MIBSEB) || defined(__MIBSEB) || defined(__MIBSEB__)
#ifndef __BIG_ENDIAN__
#define __BIG_ENDIAN__
#endif
#elif defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN || \
    defined(__LITTLE_ENDIAN__) ||                                 \
    defined(__ARMEL__) ||                                         \
    defined(__THUMBEL__) ||                                       \
    defined(__AARCH64EL__) ||                                     \
    defined(_MIPSEL) || defined(__MIPSEL) || defined(__MIPSEL__) || \
    defined(_WIN32) || defined(__i386__) || defined(__x86_64__) || \
    defined(_X86_) || defined(_IA64_)
#ifndef __LITTLE_ENDIAN__
#define __LITTLE_ENDIAN__
#endif
#else
#error "I don't know what architecture this is!"
#endif
#endif