mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/* Copyright (C) 1992-2013 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
|
|
|
|
|
|
#if defined __USE_BSD && !defined __ASSEMBLER__
|
|
/* Conversion interfaces. */
|
|
# include <bits/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 */
|