usr/src/uts/common/sys/byteorder.h

   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 2009 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 #include <sys/isa_defs.h>
  44 #include <sys/int_types.h>
  45
  46 #if defined(__GNUC__) && defined(_ASM_INLINES) && \
  47         (defined(__i386) || defined(__amd64))
  48 #include <asm/byteorder.h>
  49 #endif
  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(_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 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  66 #define ntohll(x)       (x)
  67 #define htonll(x)       (x)
  68 #endif  /* !_XPG4_2 || __EXTENSIONS__ */
  69
  70 #elif !defined(ntohl) /* little-endian */
  71
  72 #ifndef _IN_PORT_T
  73 #define _IN_PORT_T
  74 typedef uint16_t in_port_t;
  75 #endif
  76
  77 #ifndef _IN_ADDR_T
  78 #define _IN_ADDR_T
  79 typedef uint32_t in_addr_t;
  80 #endif
  81
  82 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5)
  83 extern  uint32_t htonl(uint32_t);
  84 extern  uint16_t htons(uint16_t);
  85 extern  uint32_t ntohl(uint32_t);
  86 extern  uint16_t ntohs(uint16_t);
  87 #else
  88 extern  in_addr_t htonl(in_addr_t);
  89 extern  in_port_t htons(in_port_t);
  90 extern  in_addr_t ntohl(in_addr_t);
  91 extern  in_port_t ntohs(in_port_t);
  92 #endif  /* !_XPG4_2 || __EXTENSIONS__ || _XPG5 */
  93
  94 #if defined(_LP64) || defined(_LONGLONG_TYPE)
  95 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  96 extern  uint64_t htonll(uint64_t);
  97 extern  uint64_t ntohll(uint64_t);
  98 #endif  /* !_XPG4_2 || __EXTENSIONS__ */
  99 #endif  /* _LP64 || _LONGLONG_TYPE  */
 100 #endif
 101
 102 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
 103
 104 /*
 105  * Macros to reverse byte order
 106  */
 107 #define BSWAP_8(x)      ((x) & 0xff)
 108 #if !defined(__i386) && !defined(__amd64)
 109 #define BSWAP_16(x)     ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
 110 #define BSWAP_32(x)     (((uint32_t)(x) << 24) | \
 111                         (((uint32_t)(x) << 8) & 0xff0000) | \
 112                         (((uint32_t)(x) >> 8) & 0xff00) | \
 113                         ((uint32_t)(x)  >> 24))
 114 #else /* x86 */
 115 #define BSWAP_16(x)     htons(x)
 116 #define BSWAP_32(x)     htonl(x)
 117 #endif  /* !__i386 && !__amd64 */
 118
 119 #if defined(_LP64) || defined(_LONGLONG_TYPE)
 120 #if (!defined(__i386) && !defined(__amd64))
 121 #define BSWAP_64(x)     (((uint64_t)(x) << 56) | \
 122                         (((uint64_t)(x) << 40) & 0xff000000000000ULL) | \
 123                         (((uint64_t)(x) << 24) & 0xff0000000000ULL) | \
 124                         (((uint64_t)(x) << 8)  & 0xff00000000ULL) | \
 125                         (((uint64_t)(x) >> 8)  & 0xff000000ULL) | \
 126                         (((uint64_t)(x) >> 24) & 0xff0000ULL) | \
 127                         (((uint64_t)(x) >> 40) & 0xff00ULL) | \
 128                         ((uint64_t)(x)  >> 56))
 129 #else /* x86 */
 130 #define BSWAP_64(x)     htonll(x)
 131 #endif  /* !__i386 && !__amd64 */
 132 #else /* no uint64_t */
 133 #define BSWAP_64(x)     ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
 134 #endif  /* _LP64 || _LONGLONG_TYPE  */
 135
 136 #define BMASK_8(x)      ((x) & 0xff)
 137 #define BMASK_16(x)     ((x) & 0xffff)
 138 #define BMASK_32(x)     ((x) & 0xffffffff)
 139 #define BMASK_64(x)     (x)
 140
 141 /*
 142  * Macros to convert from a specific byte order to/from native byte order
 143  */
 144 #ifdef _BIG_ENDIAN
 145 #define BE_8(x)         BMASK_8(x)
 146 #define BE_16(x)        BMASK_16(x)
 147 #define BE_32(x)        BMASK_32(x)
 148 #define BE_64(x)        BMASK_64(x)
 149 #define LE_8(x)         BSWAP_8(x)
 150 #define LE_16(x)        BSWAP_16(x)
 151 #define LE_32(x)        BSWAP_32(x)
 152 #define LE_64(x)        BSWAP_64(x)
 153 #else
 154 #define LE_8(x)         BMASK_8(x)
 155 #define LE_16(x)        BMASK_16(x)
 156 #define LE_32(x)        BMASK_32(x)
 157 #define LE_64(x)        BMASK_64(x)
 158 #define BE_8(x)         BSWAP_8(x)
 159 #define BE_16(x)        BSWAP_16(x)
 160 #define BE_32(x)        BSWAP_32(x)
 161 #define BE_64(x)        BSWAP_64(x)
 162 #endif
 163
 164 /*
 165  * Macros to read unaligned values from a specific byte order to
 166  * native byte order
 167  */
 168
 169 #define BE_IN8(xa) \
 170         *((uint8_t *)(xa))
 171
 172 #if !defined(__i386) && !defined(__amd64)
 173 #define BE_IN16(xa) \
 174         (((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa) + 1))
 175
 176 #define BE_IN32(xa) \
 177         (((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa) + 2))
 178
 179 #else /* x86 */
 180 #define BE_IN16(xa) htons(*((uint16_t *)(void *)(xa)))
 181 #define BE_IN32(xa) htonl(*((uint32_t *)(void *)(xa)))
 182 #endif  /* !__i386 && !__amd64 */
 183
 184 #if (!defined(__i386) && !defined(__amd64)) || \
 185         (!defined(_LP64) && !defined(_LONGLONG_TYPE))
 186 #define BE_IN64(xa) \
 187         (((uint64_t)BE_IN32(xa) << 32) | BE_IN32((uint8_t *)(xa) + 4))
 188 #else /* x86 */
 189 #define BE_IN64(xa) htonll(*((uint64_t *)(void *)(xa)))
 190 #endif /* (!__i386 && !__amd64) || (!_LP64 && !_LONGLONG_TYPE) */
 191
 192 #define LE_IN8(xa) \
 193         *((uint8_t *)(xa))
 194
 195 #define LE_IN16(xa) \
 196         (((uint16_t)LE_IN8((uint8_t *)(xa) + 1) << 8) | LE_IN8(xa))
 197
 198 #define LE_IN32(xa) \
 199         (((uint32_t)LE_IN16((uint8_t *)(xa) + 2) << 16) | LE_IN16(xa))
 200
 201 #define LE_IN64(xa) \
 202         (((uint64_t)LE_IN32((uint8_t *)(xa) + 4) << 32) | LE_IN32(xa))
 203
 204 /*
 205  * Macros to write unaligned values from native byte order to a specific byte
 206  * order.
 207  */
 208
 209 #define BE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv);
 210
 211 #define BE_OUT16(xa, yv) \
 212         BE_OUT8((uint8_t *)(xa) + 1, yv); \
 213         BE_OUT8((uint8_t *)(xa), (yv) >> 8);
 214
 215 #define BE_OUT32(xa, yv) \
 216         BE_OUT16((uint8_t *)(xa) + 2, yv); \
 217         BE_OUT16((uint8_t *)(xa), (yv) >> 16);
 218
 219 #if (!defined(__i386) && !defined(__amd64)) || \
 220         (!defined(_LP64) && !defined(_LONGLONG_TYPE))
 221 #define BE_OUT64(xa, yv) \
 222         BE_OUT32((uint8_t *)(xa) + 4, yv); \
 223         BE_OUT32((uint8_t *)(xa), (yv) >> 32);
 224 #else /* x86 with uint64_t */
 225 #define BE_OUT64(xa, yv) *((uint64_t *)(void *)(xa)) = htonll((uint64_t)(yv));
 226 #endif  /* (!__i386 && !__amd64) || (!_LP64 && !_LONGLONG_TYPE) */
 227
 228 #define LE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv);
 229
 230 #define LE_OUT16(xa, yv) \
 231         LE_OUT8((uint8_t *)(xa), yv); \
 232         LE_OUT8((uint8_t *)(xa) + 1, (yv) >> 8);
 233
 234 #define LE_OUT32(xa, yv) \
 235         LE_OUT16((uint8_t *)(xa), yv); \
 236         LE_OUT16((uint8_t *)(xa) + 2, (yv) >> 16);
 237
 238 #define LE_OUT64(xa, yv) \
 239         LE_OUT32((uint8_t *)(xa), yv); \
 240         LE_OUT32((uint8_t *)(xa) + 4, (yv) >> 32);
 241
 242 #endif  /* !_XPG4_2 || __EXTENSIONS__ */
 243
 244 #ifdef  __cplusplus
 245 }
 246 #endif
 247
 248 #endif /* _SYS_BYTEORDER_H */