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