1/*- 2 * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29#ifndef _SYS_ENDIAN_H_ 30#define _SYS_ENDIAN_H_ 31 32#include <sys/cdefs.h> 33#include <sys/_types.h> 34#include <machine/endian.h> 35 36#ifndef _UINT8_T_DECLARED 37typedef __uint8_t uint8_t; 38#define _UINT8_T_DECLARED 39#endif 40 41#ifndef _UINT16_T_DECLARED 42typedef __uint16_t uint16_t; 43#define _UINT16_T_DECLARED 44#endif 45 46#ifndef _UINT32_T_DECLARED 47typedef __uint32_t uint32_t; 48#define _UINT32_T_DECLARED 49#endif 50 51#ifndef _UINT64_T_DECLARED 52typedef __uint64_t uint64_t; 53#define _UINT64_T_DECLARED 54#endif 55 56/* 57 * General byte order swapping functions. 58 */ 59#define bswap16(x) __bswap16(x) 60#define bswap32(x) __bswap32(x) 61#define bswap64(x) __bswap64(x) 62 63/* 64 * Host to big endian, host to little endian, big endian to host, and little 65 * endian to host byte order functions as detailed in byteorder(9). 66 */ 67#if _BYTE_ORDER == _LITTLE_ENDIAN 68#define htobe16(x) bswap16((x)) 69#define htobe32(x) bswap32((x)) 70#define htobe64(x) bswap64((x)) 71#define htole16(x) ((uint16_t)(x)) 72#define htole32(x) ((uint32_t)(x)) 73#define htole64(x) ((uint64_t)(x)) 74 75#define be16toh(x) bswap16((x)) 76#define be32toh(x) bswap32((x)) 77#define be64toh(x) bswap64((x)) 78#define le16toh(x) ((uint16_t)(x)) 79#define le32toh(x) ((uint32_t)(x)) 80#define le64toh(x) ((uint64_t)(x)) 81#else /* _BYTE_ORDER != _LITTLE_ENDIAN */ 82#define htobe16(x) ((uint16_t)(x)) 83#define htobe32(x) ((uint32_t)(x)) 84#define htobe64(x) ((uint64_t)(x)) 85#define htole16(x) bswap16((x)) 86#define htole32(x) bswap32((x)) 87#define htole64(x) bswap64((x)) 88 89#define be16toh(x) ((uint16_t)(x)) 90#define be32toh(x) ((uint32_t)(x)) 91#define be64toh(x) ((uint64_t)(x)) 92#define le16toh(x) bswap16((x)) 93#define le32toh(x) bswap32((x)) 94#define le64toh(x) bswap64((x)) 95#endif /* _BYTE_ORDER == _LITTLE_ENDIAN */ 96 97/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ 98 99static __inline uint16_t 100be16dec(const void *pp) 101{ 102 uint8_t const *p = (uint8_t const *)pp; 103 104 return ((p[0] << 8) | p[1]); 105} 106 107static __inline uint32_t 108be32dec(const void *pp) 109{ 110 uint8_t const *p = (uint8_t const *)pp; 111 112 return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 113} 114 115static __inline uint64_t 116be64dec(const void *pp) 117{ 118 uint8_t const *p = (uint8_t const *)pp; 119 120 return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4)); 121} 122 123static __inline uint16_t 124le16dec(const void *pp) 125{ 126 uint8_t const *p = (uint8_t const *)pp; 127 128 return ((p[1] << 8) | p[0]); 129} 130 131static __inline uint32_t 132le32dec(const void *pp) 133{ 134 uint8_t const *p = (uint8_t const *)pp; 135 136 return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]); 137} 138 139static __inline uint64_t 140le64dec(const void *pp) 141{ 142 uint8_t const *p = (uint8_t const *)pp; 143 144 return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p)); 145} 146 147static __inline void 148be16enc(void *pp, uint16_t u) 149{ 150 uint8_t *p = (uint8_t *)pp; 151 152 p[0] = (u >> 8) & 0xff; 153 p[1] = u & 0xff; 154} 155 156static __inline void 157be32enc(void *pp, uint32_t u) 158{ 159 uint8_t *p = (uint8_t *)pp; 160 161 p[0] = (u >> 24) & 0xff; 162 p[1] = (u >> 16) & 0xff; 163 p[2] = (u >> 8) & 0xff; 164 p[3] = u & 0xff; 165} 166 167static __inline void 168be64enc(void *pp, uint64_t u) 169{ 170 uint8_t *p = (uint8_t *)pp; 171 172 be32enc(p, (uint32_t)(u >> 32)); 173 be32enc(p + 4, (uint32_t)(u & 0xffffffffU)); 174} 175 176static __inline void 177le16enc(void *pp, uint16_t u) 178{ 179 uint8_t *p = (uint8_t *)pp; 180 181 p[0] = u & 0xff; 182 p[1] = (u >> 8) & 0xff; 183} 184 185static __inline void 186le32enc(void *pp, uint32_t u) 187{ 188 uint8_t *p = (uint8_t *)pp; 189 190 p[0] = u & 0xff; 191 p[1] = (u >> 8) & 0xff; 192 p[2] = (u >> 16) & 0xff; 193 p[3] = (u >> 24) & 0xff; 194} 195 196static __inline void 197le64enc(void *pp, uint64_t u) 198{ 199 uint8_t *p = (uint8_t *)pp; 200 201 le32enc(p, (uint32_t)(u & 0xffffffffU)); 202 le32enc(p + 4, (uint32_t)(u >> 32)); 203} 204 205#endif /* _SYS_ENDIAN_H_ */ 206