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  -  FREEBSD11  -  FREEBSD10  -  FREEBSD9  -  FREEBSD92  -  FREEBSD91  -  FREEBSD90  -  FREEBSD8  -  FREEBSD82  -  FREEBSD81  -  FREEBSD80  -  FREEBSD7  -  FREEBSD74  -  FREEBSD73  -  FREEBSD72  -  FREEBSD71  -  FREEBSD70  -  FREEBSD6  -  FREEBSD64  -  FREEBSD63  -  FREEBSD62  -  FREEBSD61  -  FREEBSD60  -  FREEBSD5  -  FREEBSD55  -  FREEBSD54  -  FREEBSD53  -  FREEBSD52  -  FREEBSD51  -  FREEBSD50  -  FREEBSD4  -  FREEBSD3  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2002 Thomas Moestl <tmm@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: src/sys/sys/endian.h,v 1.6 2003/10/15 20:05:57 obrien Exp $
   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 _UINT16_T_DECLARED
   37 typedef __uint16_t      uint16_t;
   38 #define _UINT16_T_DECLARED
   39 #endif
   40  
   41 #ifndef _UINT32_T_DECLARED
   42 typedef __uint32_t      uint32_t;
   43 #define _UINT32_T_DECLARED
   44 #endif
   45  
   46 #ifndef _UINT64_T_DECLARED
   47 typedef __uint64_t      uint64_t;
   48 #define _UINT64_T_DECLARED
   49 #endif
   50  
   51 /*
   52  * General byte order swapping functions.
   53  */
   54 #define bswap16(x)      __bswap16(x)
   55 #define bswap32(x)      __bswap32(x)
   56 #define bswap64(x)      __bswap64(x)
   57 
   58 /*
   59  * Host to big endian, host to little endian, big endian to host, and little
   60  * endian to host byte order functions as detailed in byteorder(9).
   61  */
   62 #if _BYTE_ORDER == _LITTLE_ENDIAN
   63 #define htobe16(x)      bswap16((x))
   64 #define htobe32(x)      bswap32((x))
   65 #define htobe64(x)      bswap64((x))
   66 #define htole16(x)      ((uint16_t)(x))
   67 #define htole32(x)      ((uint32_t)(x))
   68 #define htole64(x)      ((uint64_t)(x))
   69 
   70 #define be16toh(x)      bswap16((x))
   71 #define be32toh(x)      bswap32((x))
   72 #define be64toh(x)      bswap64((x))
   73 #define le16toh(x)      ((uint16_t)(x))
   74 #define le32toh(x)      ((uint32_t)(x))
   75 #define le64toh(x)      ((uint64_t)(x))
   76 #else /* _BYTE_ORDER != _LITTLE_ENDIAN */
   77 #define htobe16(x)      ((uint16_t)(x))
   78 #define htobe32(x)      ((uint32_t)(x))
   79 #define htobe64(x)      ((uint64_t)(x))
   80 #define htole16(x)      bswap16((x))
   81 #define htole32(x)      bswap32((x))
   82 #define htole64(x)      bswap64((x))
   83 
   84 #define be16toh(x)      ((uint16_t)(x))
   85 #define be32toh(x)      ((uint32_t)(x))
   86 #define be64toh(x)      ((uint64_t)(x))
   87 #define le16toh(x)      bswap16((x))
   88 #define le32toh(x)      bswap32((x))
   89 #define le64toh(x)      bswap64((x))
   90 #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
   91 
   92 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
   93 
   94 static __inline uint16_t
   95 be16dec(const void *pp)
   96 {
   97         unsigned char const *p = (unsigned char const *)pp;
   98 
   99         return ((p[0] << 8) | p[1]);
  100 }
  101 
  102 static __inline uint32_t
  103 be32dec(const void *pp)
  104 {
  105         unsigned char const *p = (unsigned char const *)pp;
  106 
  107         return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
  108 }
  109 
  110 static __inline uint64_t
  111 be64dec(const void *pp)
  112 {
  113         unsigned char const *p = (unsigned char const *)pp;
  114 
  115         return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
  116 }
  117 
  118 static __inline uint16_t
  119 le16dec(const void *pp)
  120 {
  121         unsigned char const *p = (unsigned char const *)pp;
  122 
  123         return ((p[1] << 8) | p[0]);
  124 }
  125 
  126 static __inline uint32_t
  127 le32dec(const void *pp)
  128 {
  129         unsigned char const *p = (unsigned char const *)pp;
  130 
  131         return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
  132 }
  133 
  134 static __inline uint64_t
  135 le64dec(const void *pp)
  136 {
  137         unsigned char const *p = (unsigned char const *)pp;
  138 
  139         return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
  140 }
  141 
  142 static __inline void
  143 be16enc(void *pp, uint16_t u)
  144 {
  145         unsigned char *p = (unsigned char *)pp;
  146 
  147         p[0] = (u >> 8) & 0xff;
  148         p[1] = u & 0xff;
  149 }
  150 
  151 static __inline void
  152 be32enc(void *pp, uint32_t u)
  153 {
  154         unsigned char *p = (unsigned char *)pp;
  155 
  156         p[0] = (u >> 24) & 0xff;
  157         p[1] = (u >> 16) & 0xff;
  158         p[2] = (u >> 8) & 0xff;
  159         p[3] = u & 0xff;
  160 }
  161 
  162 static __inline void
  163 be64enc(void *pp, uint64_t u)
  164 {
  165         unsigned char *p = (unsigned char *)pp;
  166 
  167         be32enc(p, u >> 32);
  168         be32enc(p + 4, u & 0xffffffff);
  169 }
  170 
  171 static __inline void
  172 le16enc(void *pp, uint16_t u)
  173 {
  174         unsigned char *p = (unsigned char *)pp;
  175 
  176         p[0] = u & 0xff;
  177         p[1] = (u >> 8) & 0xff;
  178 }
  179 
  180 static __inline void
  181 le32enc(void *pp, uint32_t u)
  182 {
  183         unsigned char *p = (unsigned char *)pp;
  184 
  185         p[0] = u & 0xff;
  186         p[1] = (u >> 8) & 0xff;
  187         p[2] = (u >> 16) & 0xff;
  188         p[3] = (u >> 24) & 0xff;
  189 }
  190 
  191 static __inline void
  192 le64enc(void *pp, uint64_t u)
  193 {
  194         unsigned char *p = (unsigned char *)pp;
  195 
  196         le32enc(p, u & 0xffffffff);
  197         le32enc(p + 4, u >> 32);
  198 }
  199 
  200 #endif  /* _SYS_ENDIAN_H_ */

Cache object: 436dda12dd9378fcccf951ef8bafb8e8


[ 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.