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Diffstat (limited to 'src/journal/sparse-endian.h')
| -rw-r--r-- | src/journal/sparse-endian.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/journal/sparse-endian.h b/src/journal/sparse-endian.h new file mode 100644 index 0000000000..eb4dbf3615 --- /dev/null +++ b/src/journal/sparse-endian.h @@ -0,0 +1,87 @@ +/* Copyright (c) 2012 Josh Triplett <josh@joshtriplett.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ +#ifndef SPARSE_ENDIAN_H +#define SPARSE_ENDIAN_H + +#include <endian.h> +#include <stdint.h> + +#ifdef __CHECKER__ +#define __bitwise __attribute__((bitwise)) +#define __force __attribute__((force)) +#else +#define __bitwise +#define __force +#endif + +typedef uint16_t __bitwise le16_t; +typedef uint16_t __bitwise be16_t; +typedef uint32_t __bitwise le32_t; +typedef uint32_t __bitwise be32_t; +typedef uint64_t __bitwise le64_t; +typedef uint64_t __bitwise be64_t; + +#undef htobe16 +#undef htole16 +#undef be16toh +#undef le16toh +#undef htobe32 +#undef htole32 +#undef be32toh +#undef le32toh +#undef htobe64 +#undef htole64 +#undef be64toh +#undef le64toh + +#if __BYTE_ORDER == __LITTLE_ENDIAN +#define bswap_16_on_le(x) __bswap_16(x) +#define bswap_32_on_le(x) __bswap_32(x) +#define bswap_64_on_le(x) __bswap_64(x) +#define bswap_16_on_be(x) (x) +#define bswap_32_on_be(x) (x) +#define bswap_64_on_be(x) (x) +#elif __BYTE_ORDER == __BIG_ENDIAN +#define bswap_16_on_le(x) (x) +#define bswap_32_on_le(x) (x) +#define bswap_64_on_le(x) (x) +#define bswap_16_on_be(x) __bswap_16(x) +#define bswap_32_on_be(x) __bswap_32(x) +#define bswap_64_on_be(x) __bswap_64(x) +#endif + +static inline le16_t htole16(uint16_t value) { return (le16_t __force) bswap_16_on_be(value); } +static inline le32_t htole32(uint32_t value) { return (le32_t __force) bswap_32_on_be(value); } +static inline le64_t htole64(uint64_t value) { return (le64_t __force) bswap_64_on_be(value); } + +static inline be16_t htobe16(uint16_t value) { return (be16_t __force) bswap_16_on_le(value); } +static inline be32_t htobe32(uint32_t value) { return (be32_t __force) bswap_32_on_le(value); } +static inline be64_t htobe64(uint64_t value) { return (be64_t __force) bswap_64_on_le(value); } + +static inline uint16_t le16toh(le16_t value) { return bswap_16_on_be((uint16_t __force)value); } +static inline uint32_t le32toh(le32_t value) { return bswap_32_on_be((uint32_t __force)value); } +static inline uint64_t le64toh(le64_t value) { return bswap_64_on_be((uint64_t __force)value); } + +static inline uint16_t be16toh(be16_t value) { return bswap_16_on_le((uint16_t __force)value); } +static inline uint32_t be32toh(be32_t value) { return bswap_32_on_le((uint32_t __force)value); } +static inline uint64_t be64toh(be64_t value) { return bswap_64_on_le((uint64_t __force)value); } + +#endif /* SPARSE_ENDIAN_H */ |