1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _SYS_BYTEORDER_H 41 #define _SYS_BYTEORDER_H 42 43 #if defined(__GNUC__) && defined(_ASM_INLINES) && \ 44 (defined(__i386) || defined(__amd64)) 45 #include <asm/byteorder.h> 46 #endif 47 48 #include <sys/isa_defs.h> 49 #include <inttypes.h> 50 51 #ifdef __cplusplus 52 extern "C" { 53 #endif 54 55 /* 56 * macros for conversion between host and (internet) network byte order 57 */ 58 59 #if defined(_ZFS_BIG_ENDIAN) && !defined(ntohl) && !defined(__lint) 60 /* big-endian */ 61 #define ntohl(x) (x) 62 #define ntohs(x) (x) 63 #define htonl(x) (x) 64 #define htons(x) (x) 65 66 #elif !defined(ntohl) /* little-endian */ 67 68 #ifndef _IN_PORT_T 69 #define _IN_PORT_T 70 typedef uint16_t in_port_t; 71 #endif 72 73 #ifndef _IN_ADDR_T 74 #define _IN_ADDR_T 75 typedef uint32_t in_addr_t; 76 #endif 77 78 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) 79 extern uint32_t htonl(uint32_t); 80 extern uint16_t htons(uint16_t); 81 extern uint32_t ntohl(uint32_t); 82 extern uint16_t ntohs(uint16_t); 83 #else 84 extern in_addr_t htonl(in_addr_t); 85 extern in_port_t htons(in_port_t); 86 extern in_addr_t ntohl(in_addr_t); 87 extern in_port_t ntohs(in_port_t); 88 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) */ 89 #endif 90 91 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 92 93 /* 94 * Macros to reverse byte order 95 */ 96 #define BSWAP_8(x) ((x) & 0xff) 97 #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 98 #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 99 #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 100 101 #define BMASK_8(x) ((x) & 0xff) 102 #define BMASK_16(x) ((x) & 0xffff) 103 #define BMASK_32(x) ((x) & 0xffffffff) 104 #define BMASK_64(x) (x) 105 106 /* 107 * Macros to convert from a specific byte order to/from native byte order 108 */ 109 #ifdef _ZFS_BIG_ENDIAN 110 #define BE_8(x) BMASK_8(x) 111 #define BE_16(x) BMASK_16(x) 112 #define BE_32(x) BMASK_32(x) 113 #define BE_64(x) BMASK_64(x) 114 #define LE_8(x) BSWAP_8(x) 115 #define LE_16(x) BSWAP_16(x) 116 #define LE_32(x) BSWAP_32(x) 117 #define LE_64(x) BSWAP_64(x) 118 #else 119 #define LE_8(x) BMASK_8(x) 120 #define LE_16(x) BMASK_16(x) 121 #define LE_32(x) BMASK_32(x) 122 #define LE_64(x) BMASK_64(x) 123 #define BE_8(x) BSWAP_8(x) 124 #define BE_16(x) BSWAP_16(x) 125 #define BE_32(x) BSWAP_32(x) 126 #define BE_64(x) BSWAP_64(x) 127 #endif 128 129 #ifdef _ZFS_BIG_ENDIAN 130 static __inline__ uint64_t 131 htonll(uint64_t n) 132 { 133 return (n); 134 } 135 136 static __inline__ uint64_t 137 ntohll(uint64_t n) 138 { 139 return (n); 140 } 141 #else 142 static __inline__ uint64_t 143 htonll(uint64_t n) 144 { 145 return ((((uint64_t)htonl(n)) << 32) + htonl(n >> 32)); 146 } 147 148 static __inline__ uint64_t 149 ntohll(uint64_t n) 150 { 151 return ((((uint64_t)ntohl(n)) << 32) + ntohl(n >> 32)); 152 } 153 #endif 154 155 /* 156 * Macros to read unaligned values from a specific byte order to 157 * native byte order 158 */ 159 160 #define BE_IN8(xa) \ 161 *((uint8_t *)(xa)) 162 163 #define BE_IN16(xa) \ 164 (((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa)+1)) 165 166 #define BE_IN32(xa) \ 167 (((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa)+2)) 168 169 #define BE_IN64(xa) \ 170 (((uint64_t)BE_IN32(xa) << 32) | BE_IN32((uint8_t *)(xa)+4)) 171 172 #define LE_IN8(xa) \ 173 *((uint8_t *)(xa)) 174 175 #define LE_IN16(xa) \ 176 (((uint16_t)LE_IN8((uint8_t *)(xa) + 1) << 8) | LE_IN8(xa)) 177 178 #define LE_IN32(xa) \ 179 (((uint32_t)LE_IN16((uint8_t *)(xa) + 2) << 16) | LE_IN16(xa)) 180 181 #define LE_IN64(xa) \ 182 (((uint64_t)LE_IN32((uint8_t *)(xa) + 4) << 32) | LE_IN32(xa)) 183 184 /* 185 * Macros to write unaligned values from native byte order to a specific byte 186 * order. 187 */ 188 189 #define BE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv); 190 191 #define BE_OUT16(xa, yv) \ 192 BE_OUT8((uint8_t *)(xa) + 1, yv); \ 193 BE_OUT8((uint8_t *)(xa), (yv) >> 8); 194 195 #define BE_OUT32(xa, yv) \ 196 BE_OUT16((uint8_t *)(xa) + 2, yv); \ 197 BE_OUT16((uint8_t *)(xa), (yv) >> 16); 198 199 #define BE_OUT64(xa, yv) \ 200 BE_OUT32((uint8_t *)(xa) + 4, yv); \ 201 BE_OUT32((uint8_t *)(xa), (yv) >> 32); 202 203 #define LE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv); 204 205 #define LE_OUT16(xa, yv) \ 206 LE_OUT8((uint8_t *)(xa), yv); \ 207 LE_OUT8((uint8_t *)(xa) + 1, (yv) >> 8); 208 209 #define LE_OUT32(xa, yv) \ 210 LE_OUT16((uint8_t *)(xa), yv); \ 211 LE_OUT16((uint8_t *)(xa) + 2, (yv) >> 16); 212 213 #define LE_OUT64(xa, yv) \ 214 LE_OUT32((uint8_t *)(xa), yv); \ 215 LE_OUT32((uint8_t *)(xa) + 4, (yv) >> 32); 216 217 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 218 219 #ifdef __cplusplus 220 } 221 #endif 222 223 #endif /* _SYS_BYTEORDER_H */ 224