bigbiff bigbiff
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
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byteorder.h (12.01.10)
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Endianness stuff. exFAT uses little-endian byte order.
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Free exFAT implementation.
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Copyright (C) 2010-2013 Andrew Nayenko
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef BYTEORDER_H_INCLUDED
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#define BYTEORDER_H_INCLUDED
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#define __GLIBC__
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#include <stdint.h>
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#if defined(__GLIBC__)
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#include <endian.h>
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#include <byteswap.h>
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#elif defined(__APPLE__)
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#include <machine/endian.h>
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#include <libkern/OSByteOrder.h>
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#define bswap_16(x) OSSwapInt16(x)
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#define bswap_32(x) OSSwapInt32(x)
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#define bswap_64(x) OSSwapInt64(x)
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#define __BYTE_ORDER BYTE_ORDER
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#define __LITTLE_ENDIAN LITTLE_ENDIAN
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#define __BIG_ENDIAN BIG_ENDIAN
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#elif defined(__FreeBSD__) || defined(__DragonFlyBSD__) || defined(__NetBSD__)
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#include <sys/endian.h>
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#define bswap_16(x) bswap16(x)
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#define bswap_32(x) bswap32(x)
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#define bswap_64(x) bswap64(x)
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#define __BYTE_ORDER _BYTE_ORDER
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#define __LITTLE_ENDIAN _LITTLE_ENDIAN
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#define __BIG_ENDIAN _BIG_ENDIAN
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#elif defined(__OpenBSD__)
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#include <machine/endian.h>
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#define bswap_16(x) swap16(x)
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#define bswap_32(x) swap32(x)
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#define bswap_64(x) swap64(x)
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#define __BYTE_ORDER _BYTE_ORDER
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#define __LITTLE_ENDIAN _LITTLE_ENDIAN
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#define __BIG_ENDIAN _BIG_ENDIAN
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#elif defined(__sun)
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#include <sys/byteorder.h>
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#define bswap_16(x) BSWAP_16(x)
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#define bswap_32(x) BSWAP_32(x)
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#define bswap_64(x) BSWAP_64(x)
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#define __LITTLE_ENDIAN 1234
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#define __BIG_ENDIAN 4321
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#ifdef _LITTLE_ENDIAN
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#define __BYTE_ORDER __LITTLE_ENDIAN
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#else
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#define __BYTE_ORDER __BIG_ENDIAN
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#endif
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#else
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#error No byte order macros available for your platform
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#endif
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typedef struct { uint16_t __u16; } le16_t;
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typedef struct { uint32_t __u32; } le32_t;
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typedef struct { uint64_t __u64; } le64_t;
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; }
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static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; }
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static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; }
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static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; }
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static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; }
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static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; }
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#elif __BYTE_ORDER == __BIG_ENDIAN
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static inline uint16_t le16_to_cpu(le16_t v) { return bswap_16(v.__u16); }
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static inline uint32_t le32_to_cpu(le32_t v) { return bswap_32(v.__u32); }
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static inline uint64_t le64_to_cpu(le64_t v) { return bswap_64(v.__u64); }
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static inline le16_t cpu_to_le16(uint16_t v)
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{ le16_t t = {bswap_16(v)}; return t; }
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static inline le32_t cpu_to_le32(uint32_t v)
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{ le32_t t = {bswap_32(v)}; return t; }
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static inline le64_t cpu_to_le64(uint64_t v)
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{ le64_t t = {bswap_64(v)}; return t; }
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#else
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#error Wow! You have a PDP machine?!
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#endif
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#endif /* ifndef BYTEORDER_H_INCLUDED */
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