sl@0: /*- sl@0: * Copyright (c) 2002 Thomas Moestl sl@0: * All rights reserved. sl@0: * sl@0: * Redistribution and use in source and binary forms, with or without sl@0: * modification, are permitted provided that the following conditions sl@0: * are met: sl@0: * 1. Redistributions of source code must retain the above copyright sl@0: * notice, this list of conditions and the following disclaimer. sl@0: * 2. Redistributions in binary form must reproduce the above copyright sl@0: * notice, this list of conditions and the following disclaimer in the sl@0: * documentation and/or other materials provided with the distribution. sl@0: * sl@0: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF sl@0: * SUCH DAMAGE. sl@0: * sl@0: * $FreeBSD: src/sys/sys/endian.h,v 1.6 2003/10/15 20:05:57 obrien Exp $ sl@0: */ sl@0: sl@0: #ifndef _SYS_ENDIAN_H_ sl@0: #define _SYS_ENDIAN_H_ sl@0: sl@0: #include sl@0: #include sl@0: #include sl@0: sl@0: #ifndef _UINT16_T_DECLARED sl@0: typedef __uint16_t uint16_t; sl@0: #define _UINT16_T_DECLARED sl@0: #endif sl@0: sl@0: #ifndef _UINT32_T_DECLARED sl@0: typedef __uint32_t uint32_t; sl@0: #define _UINT32_T_DECLARED sl@0: #endif sl@0: sl@0: #ifndef _UINT64_T_DECLARED sl@0: typedef __uint64_t uint64_t; sl@0: #define _UINT64_T_DECLARED sl@0: #endif sl@0: sl@0: /* sl@0: * General byte order swapping functions. sl@0: */ sl@0: #define bswap16(x) __bswap16(x) sl@0: #define bswap32(x) __bswap32(x) sl@0: #define bswap64(x) __bswap64(x) sl@0: sl@0: /* sl@0: * Host to big endian, host to little endian, big endian to host, and little sl@0: * endian to host byte order functions as detailed in byteorder(9). sl@0: */ sl@0: #if _BYTE_ORDER == _LITTLE_ENDIAN sl@0: #define htobe16(x) bswap16((x)) sl@0: #define htobe32(x) bswap32((x)) sl@0: #define htobe64(x) bswap64((x)) sl@0: #define htole16(x) ((uint16_t)(x)) sl@0: #define htole32(x) ((uint32_t)(x)) sl@0: #define htole64(x) ((uint64_t)(x)) sl@0: sl@0: #define be16toh(x) bswap16((x)) sl@0: #define be32toh(x) bswap32((x)) sl@0: #define be64toh(x) bswap64((x)) sl@0: #define le16toh(x) ((uint16_t)(x)) sl@0: #define le32toh(x) ((uint32_t)(x)) sl@0: #define le64toh(x) ((uint64_t)(x)) sl@0: #else /* _BYTE_ORDER != _LITTLE_ENDIAN */ sl@0: #define htobe16(x) ((uint16_t)(x)) sl@0: #define htobe32(x) ((uint32_t)(x)) sl@0: #define htobe64(x) ((uint64_t)(x)) sl@0: #define htole16(x) bswap16((x)) sl@0: #define htole32(x) bswap32((x)) sl@0: #define htole64(x) bswap64((x)) sl@0: sl@0: #define be16toh(x) ((uint16_t)(x)) sl@0: #define be32toh(x) ((uint32_t)(x)) sl@0: #define be64toh(x) ((uint64_t)(x)) sl@0: #define le16toh(x) bswap16((x)) sl@0: #define le32toh(x) bswap32((x)) sl@0: #define le64toh(x) bswap64((x)) sl@0: #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */ sl@0: sl@0: /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ sl@0: sl@0: static __inline uint16_t sl@0: be16dec(const void *pp) sl@0: { sl@0: unsigned char const *p = (unsigned char const *)pp; sl@0: sl@0: return ((p[0] << 8) | p[1]); sl@0: } sl@0: sl@0: static __inline uint32_t sl@0: be32dec(const void *pp) sl@0: { sl@0: unsigned char const *p = (unsigned char const *)pp; sl@0: sl@0: return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); sl@0: } sl@0: sl@0: static __inline uint64_t sl@0: be64dec(const void *pp) sl@0: { sl@0: unsigned char const *p = (unsigned char const *)pp; sl@0: sl@0: return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4)); sl@0: } sl@0: sl@0: static __inline uint16_t sl@0: le16dec(const void *pp) sl@0: { sl@0: unsigned char const *p = (unsigned char const *)pp; sl@0: sl@0: return ((p[1] << 8) | p[0]); sl@0: } sl@0: sl@0: static __inline uint32_t sl@0: le32dec(const void *pp) sl@0: { sl@0: unsigned char const *p = (unsigned char const *)pp; sl@0: sl@0: return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]); sl@0: } sl@0: sl@0: static __inline uint64_t sl@0: le64dec(const void *pp) sl@0: { sl@0: unsigned char const *p = (unsigned char const *)pp; sl@0: sl@0: return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p)); sl@0: } sl@0: sl@0: static __inline void sl@0: be16enc(void *pp, uint16_t u) sl@0: { sl@0: unsigned char *p = (unsigned char *)pp; sl@0: sl@0: p[0] = (u >> 8) & 0xff; sl@0: p[1] = u & 0xff; sl@0: } sl@0: sl@0: static __inline void sl@0: be32enc(void *pp, uint32_t u) sl@0: { sl@0: unsigned char *p = (unsigned char *)pp; sl@0: sl@0: p[0] = (u >> 24) & 0xff; sl@0: p[1] = (u >> 16) & 0xff; sl@0: p[2] = (u >> 8) & 0xff; sl@0: p[3] = u & 0xff; sl@0: } sl@0: sl@0: static __inline void sl@0: be64enc(void *pp, uint64_t u) sl@0: { sl@0: unsigned char *p = (unsigned char *)pp; sl@0: sl@0: be32enc(p, u >> 32); sl@0: be32enc(p + 4, u & 0xffffffff); sl@0: } sl@0: sl@0: static __inline void sl@0: le16enc(void *pp, uint16_t u) sl@0: { sl@0: unsigned char *p = (unsigned char *)pp; sl@0: sl@0: p[0] = u & 0xff; sl@0: p[1] = (u >> 8) & 0xff; sl@0: } sl@0: sl@0: static __inline void sl@0: le32enc(void *pp, uint32_t u) sl@0: { sl@0: unsigned char *p = (unsigned char *)pp; sl@0: sl@0: p[0] = u & 0xff; sl@0: p[1] = (u >> 8) & 0xff; sl@0: p[2] = (u >> 16) & 0xff; sl@0: p[3] = (u >> 24) & 0xff; sl@0: } sl@0: sl@0: static __inline void sl@0: le64enc(void *pp, uint64_t u) sl@0: { sl@0: unsigned char *p = (unsigned char *)pp; sl@0: sl@0: le32enc(p, u & 0xffffffff); sl@0: le32enc(p + 4, u >> 32); sl@0: } sl@0: sl@0: #endif /* _SYS_ENDIAN_H_ */