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 #pragma ident "%Z%%M% %I% %E% SMI" 44 45 #include <sys/isa_defs.h> 46 #include <sys/int_types.h> 47 48 #if defined(__GNUC__) && defined(_ASM_INLINES) && \ 49 (defined(__i386) || defined(__amd64)) 50 #include <asm/byteorder.h> 51 #endif 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 /* 58 * macros for conversion between host and (internet) network byte order 59 */ 60 61 #if defined(_BIG_ENDIAN) && !defined(ntohl) && !defined(__lint) 62 /* big-endian */ 63 #define ntohl(x) (x) 64 #define ntohs(x) (x) 65 #define htonl(x) (x) 66 #define htons(x) (x) 67 68 #elif !defined(ntohl) /* little-endian */ 69 70 #ifndef _IN_PORT_T 71 #define _IN_PORT_T 72 typedef uint16_t in_port_t; 73 #endif 74 75 #ifndef _IN_ADDR_T 76 #define _IN_ADDR_T 77 typedef uint32_t in_addr_t; 78 #endif 79 80 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) 81 extern uint32_t htonl(uint32_t); 82 extern uint16_t htons(uint16_t); 83 extern uint32_t ntohl(uint32_t); 84 extern uint16_t ntohs(uint16_t); 85 #else 86 extern in_addr_t htonl(in_addr_t); 87 extern in_port_t htons(in_port_t); 88 extern in_addr_t ntohl(in_addr_t); 89 extern in_port_t ntohs(in_port_t); 90 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) */ 91 #endif 92 93 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 94 95 /* 96 * Macros to reverse byte order 97 */ 98 #define BSWAP_8(x) ((x) & 0xff) 99 #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 100 #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 101 #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 102 103 #define BMASK_8(x) ((x) & 0xff) 104 #define BMASK_16(x) ((x) & 0xffff) 105 #define BMASK_32(x) ((x) & 0xffffffff) 106 #define BMASK_64(x) (x) 107 108 /* 109 * Macros to convert from a specific byte order to/from native byte order 110 */ 111 #ifdef _BIG_ENDIAN 112 #define BE_8(x) BMASK_8(x) 113 #define BE_16(x) BMASK_16(x) 114 #define BE_32(x) BMASK_32(x) 115 #define BE_64(x) BMASK_64(x) 116 #define LE_8(x) BSWAP_8(x) 117 #define LE_16(x) BSWAP_16(x) 118 #define LE_32(x) BSWAP_32(x) 119 #define LE_64(x) BSWAP_64(x) 120 #else 121 #define LE_8(x) BMASK_8(x) 122 #define LE_16(x) BMASK_16(x) 123 #define LE_32(x) BMASK_32(x) 124 #define LE_64(x) BMASK_64(x) 125 #define BE_8(x) BSWAP_8(x) 126 #define BE_16(x) BSWAP_16(x) 127 #define BE_32(x) BSWAP_32(x) 128 #define BE_64(x) BSWAP_64(x) 129 #endif 130 131 /* 132 * Macros to read unaligned values from a specific byte order to 133 * native byte order 134 */ 135 136 #define BE_IN8(xa) \ 137 *((uint8_t *)(xa)) 138 139 #define BE_IN16(xa) \ 140 (((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa)+1)) 141 142 #define BE_IN32(xa) \ 143 (((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa)+2)) 144 145 #define BE_IN64(xa) \ 146 (((uint64_t)BE_IN32(xa) << 32) | BE_IN32((uint8_t *)(xa)+4)) 147 148 #define LE_IN8(xa) \ 149 *((uint8_t *)(xa)) 150 151 #define LE_IN16(xa) \ 152 (((uint16_t)LE_IN8((uint8_t *)(xa) + 1) << 8) | LE_IN8(xa)) 153 154 #define LE_IN32(xa) \ 155 (((uint32_t)LE_IN16((uint8_t *)(xa) + 2) << 16) | LE_IN16(xa)) 156 157 #define LE_IN64(xa) \ 158 (((uint64_t)LE_IN32((uint8_t *)(xa) + 4) << 32) | LE_IN32(xa)) 159 160 /* 161 * Macros to write unaligned values from native byte order to a specific byte 162 * order. 163 */ 164 165 #define BE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv); 166 167 #define BE_OUT16(xa, yv) \ 168 BE_OUT8((uint8_t *)(xa) + 1, yv); \ 169 BE_OUT8((uint8_t *)(xa), (yv) >> 8); 170 171 #define BE_OUT32(xa, yv) \ 172 BE_OUT16((uint8_t *)(xa) + 2, yv); \ 173 BE_OUT16((uint8_t *)(xa), (yv) >> 16); 174 175 #define BE_OUT64(xa, yv) \ 176 BE_OUT32((uint8_t *)(xa) + 4, yv); \ 177 BE_OUT32((uint8_t *)(xa), (yv) >> 32); 178 179 #define LE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv); 180 181 #define LE_OUT16(xa, yv) \ 182 LE_OUT8((uint8_t *)(xa), yv); \ 183 LE_OUT8((uint8_t *)(xa) + 1, (yv) >> 8); 184 185 #define LE_OUT32(xa, yv) \ 186 LE_OUT16((uint8_t *)(xa), yv); \ 187 LE_OUT16((uint8_t *)(xa) + 2, (yv) >> 16); 188 189 #define LE_OUT64(xa, yv) \ 190 LE_OUT32((uint8_t *)(xa), yv); \ 191 LE_OUT32((uint8_t *)(xa) + 4, (yv) >> 32); 192 193 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 194 195 #ifdef __cplusplus 196 } 197 #endif 198 199 #endif /* _SYS_BYTEORDER_H */ 200