The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/endian.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: endian.h,v 1.7.2.1 2004/07/02 18:18:01 he Exp $        */
    2 
    3 /*
    4  * Copyright (c) 1987, 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)endian.h    8.1 (Berkeley) 6/11/93
   32  */
   33 
   34 #ifndef _SYS_ENDIAN_H_
   35 #define _SYS_ENDIAN_H_
   36 
   37 #include <sys/featuretest.h>
   38 
   39 /*
   40  * Definitions for byte order, according to byte significance from low
   41  * address to high.
   42  */
   43 #define _LITTLE_ENDIAN  1234    /* LSB first: i386, vax */
   44 #define _BIG_ENDIAN     4321    /* MSB first: 68000, ibm, net */
   45 #define _PDP_ENDIAN     3412    /* LSB first in word, MSW first in long */
   46 
   47 #include <machine/endian_machdep.h>
   48 
   49 /*
   50  * Define the order of 32-bit words in 64-bit words.
   51  */
   52 #if _BYTE_ORDER == _LITTLE_ENDIAN
   53 #define _QUAD_HIGHWORD 1
   54 #define _QUAD_LOWWORD 0
   55 #endif
   56 
   57 #if _BYTE_ORDER == _BIG_ENDIAN
   58 #define _QUAD_HIGHWORD 0
   59 #define _QUAD_LOWWORD 1
   60 #endif
   61 
   62 
   63 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
   64 /*
   65  *  Traditional names for byteorder.  These are defined as the numeric
   66  *  sequences so that third party code can "#define XXX_ENDIAN" and not
   67  *  cause errors.
   68  */
   69 #define LITTLE_ENDIAN   1234            /* LSB first: i386, vax */
   70 #define BIG_ENDIAN      4321            /* MSB first: 68000, ibm, net */
   71 #define PDP_ENDIAN      3412            /* LSB first in word, MSW first in long */
   72 #define BYTE_ORDER      _BYTE_ORDER
   73 
   74 #ifndef _LOCORE
   75 /* C-family endian-ness definitions */
   76 
   77 #include <sys/ansi.h>
   78 #include <sys/cdefs.h>
   79 #include <sys/types.h>
   80 
   81 #ifndef in_addr_t
   82 typedef __in_addr_t     in_addr_t;
   83 #define in_addr_t       __in_addr_t
   84 #endif
   85 
   86 #ifndef in_port_t
   87 typedef __in_port_t     in_port_t;
   88 #define in_port_t       __in_port_t
   89 #endif
   90 
   91 __BEGIN_DECLS
   92 uint32_t        htonl __P((uint32_t)) __attribute__((__const__));
   93 uint16_t        htons __P((uint16_t)) __attribute__((__const__));
   94 uint32_t        ntohl __P((uint32_t)) __attribute__((__const__));
   95 uint16_t        ntohs __P((uint16_t)) __attribute__((__const__));
   96 __END_DECLS
   97 
   98 /*
   99  * Macros for network/external number representation conversion.
  100  */
  101 #if BYTE_ORDER == BIG_ENDIAN && !defined(__lint__)
  102 #define ntohl(x)        (x)
  103 #define ntohs(x)        (x)
  104 #define htonl(x)        (x)
  105 #define htons(x)        (x)
  106 
  107 #define NTOHL(x)        (void) (x)
  108 #define NTOHS(x)        (void) (x)
  109 #define HTONL(x)        (void) (x)
  110 #define HTONS(x)        (void) (x)
  111 
  112 #else   /* LITTLE_ENDIAN || !defined(__lint__) */
  113 
  114 #define NTOHL(x)        (x) = ntohl((uint32_t)(x))
  115 #define NTOHS(x)        (x) = ntohs((uint16_t)(x))
  116 #define HTONL(x)        (x) = htonl((uint32_t)(x))
  117 #define HTONS(x)        (x) = htons((uint16_t)(x))
  118 #endif  /* LITTLE_ENDIAN || !defined(__lint__) */
  119 
  120 /*
  121  * Macros to convert to a specific endianness.
  122  */
  123 
  124 #include <machine/bswap.h>
  125 
  126 #if BYTE_ORDER == BIG_ENDIAN
  127 
  128 #define htobe16(x)      (x)
  129 #define htobe32(x)      (x)
  130 #define htobe64(x)      (x)
  131 #define htole16(x)      bswap16((u_int16_t)(x))
  132 #define htole32(x)      bswap32((u_int32_t)(x))
  133 #define htole64(x)      bswap64((u_int64_t)(x))
  134 
  135 #define HTOBE16(x)      (void) (x)
  136 #define HTOBE32(x)      (void) (x)
  137 #define HTOBE64(x)      (void) (x)
  138 #define HTOLE16(x)      (x) = bswap16((u_int16_t)(x))
  139 #define HTOLE32(x)      (x) = bswap32((u_int32_t)(x))
  140 #define HTOLE64(x)      (x) = bswap64((u_int64_t)(x))
  141 
  142 #else   /* LITTLE_ENDIAN */
  143 
  144 #define htobe16(x)      bswap16((u_int16_t)(x))
  145 #define htobe32(x)      bswap32((u_int32_t)(x))
  146 #define htobe64(x)      bswap64((u_int64_t)(x))
  147 #define htole16(x)      (x)
  148 #define htole32(x)      (x)
  149 #define htole64(x)      (x)
  150 
  151 #define HTOBE16(x)      (x) = bswap16((u_int16_t)(x))
  152 #define HTOBE32(x)      (x) = bswap32((u_int32_t)(x))
  153 #define HTOBE64(x)      (x) = bswap64((u_int64_t)(x))
  154 #define HTOLE16(x)      (void) (x)
  155 #define HTOLE32(x)      (void) (x)
  156 #define HTOLE64(x)      (void) (x)
  157 
  158 #endif  /* LITTLE_ENDIAN */
  159 
  160 #define be16toh(x)      htobe16(x)
  161 #define be32toh(x)      htobe32(x)
  162 #define be64toh(x)      htobe64(x)
  163 #define le16toh(x)      htole16(x)
  164 #define le32toh(x)      htole32(x)
  165 #define le64toh(x)      htole64(x)
  166 
  167 #define BE16TOH(x)      HTOBE16(x)
  168 #define BE32TOH(x)      HTOBE32(x)
  169 #define BE64TOH(x)      HTOBE64(x)
  170 #define LE16TOH(x)      HTOLE16(x)
  171 #define LE32TOH(x)      HTOLE32(x)
  172 #define LE64TOH(x)      HTOLE64(x)
  173 
  174 #endif /* !_LOCORE */
  175 #endif /* !_POSIX_SOURCE */
  176 #endif /* !_SYS_ENDIAN_H_ */

Cache object: a907f97cf63c92a2add007803f0c3f45


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.