diff options
| -rw-r--r-- | portability/endian.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/portability/endian.h b/portability/endian.h new file mode 100644 index 0000000..a9cc380 --- /dev/null +++ b/portability/endian.h @@ -0,0 +1,61 @@ +/* endian.h - portable endian routines + * + * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org> + * Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi> + * Copyright (C) 2011 Rich Felker + * All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0-only + */ + +#ifdef __linux__ +# include_next <endian.h> +#else + +#pragma once +#include <stdint.h> + +static __inline uint16_t __portable_bswap16(uint16_t __x) +{ + return (__x<<8) | (__x>>8); +} + +static __inline uint32_t __portable_bswap32(uint32_t __x) +{ + return (__x>>24) | (__x>>8&0xff00) | (__x<<8&0xff0000) | (__x<<24); +} + +static __inline uint64_t __portable_bswap64(uint64_t __x) +{ + return (__portable_bswap32(__x)+0ULL)<<32 | __portable_bswap32(__x>>32); +} + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ +# define htobe16(x) __portable_bswap16(x) +# define be16toh(x) __portable_bswap16(x) +# define htobe32(x) __portable_bswap32(x) +# define be32toh(x) __portable_bswap32(x) +# define htobe64(x) __portable_bswap64(x) +# define be64toh(x) __portable_bswap64(x) +# define htole16(x) (uint16_t)(x) +# define le16toh(x) (uint16_t)(x) +# define htole32(x) (uint32_t)(x) +# define le32toh(x) (uint32_t)(x) +# define htole64(x) (uint64_t)(x) +# define le64toh(x) (uint64_t)(x) +#else +# define htobe16(x) (uint16_t)(x) +# define be16toh(x) (uint16_t)(x) +# define htobe32(x) (uint32_t)(x) +# define be32toh(x) (uint32_t)(x) +# define htobe64(x) (uint64_t)(x) +# define be64toh(x) (uint64_t)(x) +# define htole16(x) __portable_bswap16(x) +# define le16toh(x) __portable_bswap16(x) +# define htole32(x) __portable_bswap32(x) +# define le32toh(x) __portable_bswap32(x) +# define htole64(x) __portable_bswap64(x) +# define le64toh(x) __portable_bswap64(x) +#endif + +#endif |