1 /*- 2 * Copyright (c) 2002 Thomas Moestl <tmm (at) 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 37 typedef __uint8_t uint8_t; 38 #define _UINT8_T_DECLARED 39 #endif 40 41 #ifndef _UINT16_T_DECLARED 42 typedef __uint16_t uint16_t; 43 #define _UINT16_T_DECLARED 44 #endif 45 46 #ifndef _UINT32_T_DECLARED 47 typedef __uint32_t uint32_t; 48 #define _UINT32_T_DECLARED 49 #endif 50 51 #ifndef _UINT64_T_DECLARED 52 typedef __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 99 static __inline uint16_t 100 be16dec(const void *pp) 101 { 102 uint8_t const *p = (uint8_t const *)pp; 103 104 return ((p[0] << 8) | p[1]); 105 } 106 107 static __inline uint32_t 108 be32dec(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 } 114 115 static __inline uint64_t 116 be64dec(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 } 122 123 static __inline uint16_t 124 le16dec(const void *pp) 125 { 126 uint8_t const *p = (uint8_t const *)pp; 127 128 return ((p[1] << 8) | p[0]); 129 } 130 131 static __inline uint32_t 132 le32dec(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 } 138 139 static __inline uint64_t 140 le64dec(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 } 146 147 static __inline void 148 be16enc(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 } 155 156 static __inline void 157 be32enc(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 } 166 167 static __inline void 168 be64enc(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 } 175 176 static __inline void 177 le16enc(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 } 184 185 static __inline void 186 le32enc(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 } 195 196 static __inline void 197 le64enc(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
