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- /* Copyright (C) 1992, 1996, 1997, 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #ifndef _ENDIAN_H
- #define _ENDIAN_H 1
- #include <features.h>
- /* Definitions for byte order, according to significance of bytes,
- from low addresses to high addresses. The value is what you get by
- putting '4' in the most significant byte, '3' in the second most
- significant byte, '2' in the second least significant byte, and '1'
- in the least significant byte, and then writing down one digit for
- each byte, starting with the byte at the lowest address at the left,
- and proceeding to the byte with the highest address at the right. */
- #define __LITTLE_ENDIAN 1234
- #define __BIG_ENDIAN 4321
- #define __PDP_ENDIAN 3412
- /* This file defines `__BYTE_ORDER' for the particular machine. */
- #include <bits/endian.h>
- /* Some machines may need to use a different endianness for floating point
- values. */
- #ifndef __FLOAT_WORD_ORDER
- # define __FLOAT_WORD_ORDER __BYTE_ORDER
- #endif
- #ifdef __USE_BSD
- # define LITTLE_ENDIAN __LITTLE_ENDIAN
- # define BIG_ENDIAN __BIG_ENDIAN
- # define PDP_ENDIAN __PDP_ENDIAN
- # define BYTE_ORDER __BYTE_ORDER
- #endif
- #if __BYTE_ORDER == __LITTLE_ENDIAN
- # define __LONG_LONG_PAIR(HI, LO) LO, HI
- #elif __BYTE_ORDER == __BIG_ENDIAN
- # define __LONG_LONG_PAIR(HI, LO) HI, LO
- #endif
- #ifdef _LIBC
- # ifndef __ASSEMBLER__
- # include <stdint.h>
- # define OFF_HI(offset) (offset >> 31)
- # define OFF_LO(offset) (offset)
- # define OFF64_HI(offset) (uint32_t)(offset >> 32)
- # define OFF64_LO(offset) (uint32_t)(offset & 0xffffffff)
- # define OFF_HI_LO(offset) __LONG_LONG_PAIR(OFF_HI(offset), OFF_LO(offset))
- # define OFF64_HI_LO(offset) __LONG_LONG_PAIR(OFF64_HI(offset), OFF64_LO(offset))
- # endif
- #endif
- #if defined(__USE_BSD) && !defined(__ASSEMBLER__)
- /* Conversion interfaces. */
- # include <byteswap.h>
- # if __BYTE_ORDER == __LITTLE_ENDIAN
- # define htobe16(x) __bswap_16 (x)
- # define htole16(x) (x)
- # define be16toh(x) __bswap_16 (x)
- # define le16toh(x) (x)
- # define htobe32(x) __bswap_32 (x)
- # define htole32(x) (x)
- # define be32toh(x) __bswap_32 (x)
- # define le32toh(x) (x)
- # define htobe64(x) __bswap_64 (x)
- # define htole64(x) (x)
- # define be64toh(x) __bswap_64 (x)
- # define le64toh(x) (x)
- # else
- # define htobe16(x) (x)
- # define htole16(x) __bswap_16 (x)
- # define be16toh(x) (x)
- # define le16toh(x) __bswap_16 (x)
- # define htobe32(x) (x)
- # define htole32(x) __bswap_32 (x)
- # define be32toh(x) (x)
- # define le32toh(x) __bswap_32 (x)
- # define htobe64(x) (x)
- # define htole64(x) __bswap_64 (x)
- # define be64toh(x) (x)
- # define le64toh(x) __bswap_64 (x)
- # endif
- #endif
- #endif /* endian.h */
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