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101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/* Copyright (C) 1992-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _ENDIAN_H
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#define _ENDIAN_H 1
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#include <features.h>
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/* Definitions for byte order, according to significance of bytes,
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from low addresses to high addresses. The value is what you get by
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putting '4' in the most significant byte, '3' in the second most
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significant byte, '2' in the second least significant byte, and '1'
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in the least significant byte, and then writing down one digit for
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each byte, starting with the byte at the lowest address at the left,
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and proceeding to the byte with the highest address at the right. */
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#define __LITTLE_ENDIAN 1234
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#define __BIG_ENDIAN 4321
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#define __PDP_ENDIAN 3412
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/* This file defines `__BYTE_ORDER' for the particular machine. */
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#include <bits/endian.h>
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/* Some machines may need to use a different endianness for floating point
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values. */
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#ifndef __FLOAT_WORD_ORDER
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# define __FLOAT_WORD_ORDER __BYTE_ORDER
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#endif
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#ifdef __USE_BSD
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# define LITTLE_ENDIAN __LITTLE_ENDIAN
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# define BIG_ENDIAN __BIG_ENDIAN
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# define PDP_ENDIAN __PDP_ENDIAN
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# define BYTE_ORDER __BYTE_ORDER
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#endif
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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# define __LONG_LONG_PAIR(HI, LO) LO, HI
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#elif __BYTE_ORDER == __BIG_ENDIAN
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# define __LONG_LONG_PAIR(HI, LO) HI, LO
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#endif
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#if defined __USE_BSD && !defined __ASSEMBLER__
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/* Conversion interfaces. */
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# include <bits/byteswap.h>
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# if __BYTE_ORDER == __LITTLE_ENDIAN
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# define htobe16(x) __bswap_16 (x)
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# define htole16(x) (x)
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# define be16toh(x) __bswap_16 (x)
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# define le16toh(x) (x)
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# define htobe32(x) __bswap_32 (x)
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# define htole32(x) (x)
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# define be32toh(x) __bswap_32 (x)
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# define le32toh(x) (x)
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# if __GLIBC_HAVE_LONG_LONG
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# define htobe64(x) __bswap_64 (x)
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# define htole64(x) (x)
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# define be64toh(x) __bswap_64 (x)
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# define le64toh(x) (x)
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# endif
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# else
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# define htobe16(x) (x)
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# define htole16(x) __bswap_16 (x)
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# define be16toh(x) (x)
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# define le16toh(x) __bswap_16 (x)
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# define htobe32(x) (x)
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# define htole32(x) __bswap_32 (x)
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# define be32toh(x) (x)
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# define le32toh(x) __bswap_32 (x)
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# if __GLIBC_HAVE_LONG_LONG
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# define htobe64(x) (x)
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# define htole64(x) __bswap_64 (x)
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# define be64toh(x) (x)
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# define le64toh(x) __bswap_64 (x)
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# endif
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# endif
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#endif
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#endif /* endian.h */
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