uspace/lib/c/include/byteorder.h

   1 /*
   2  * Copyright (c) 2005 Jakub Jermar
   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  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup libc
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #ifndef _LIBC_BYTEORDER_H_
  36 #define _LIBC_BYTEORDER_H_
  37
  38 #include <stdint.h>
  39
  40 #if !(defined(__BE__) ^ defined(__LE__))
  41 #error The architecture must be either big-endian or little-endian.
  42 #endif
  43
  44 #ifdef __BE__
  45
  46 #define uint16_t_le2host(n)  (uint16_t_byteorder_swap(n))
  47 #define uint32_t_le2host(n)  (uint32_t_byteorder_swap(n))
  48 #define uint64_t_le2host(n)  (uint64_t_byteorder_swap(n))
  49
  50 #define uint16_t_be2host(n)  (n)
  51 #define uint32_t_be2host(n)  (n)
  52 #define uint64_t_be2host(n)  (n)
  53
  54 #define host2uint16_t_le(n)  (uint16_t_byteorder_swap(n))
  55 #define host2uint32_t_le(n)  (uint32_t_byteorder_swap(n))
  56 #define host2uint64_t_le(n)  (uint64_t_byteorder_swap(n))
  57
  58 #define host2uint16_t_be(n)  (n)
  59 #define host2uint32_t_be(n)  (n)
  60 #define host2uint64_t_be(n)  (n)
  61
  62 #else
  63
  64 #define uint16_t_le2host(n)  (n)
  65 #define uint32_t_le2host(n)  (n)
  66 #define uint64_t_le2host(n)  (n)
  67
  68 #define uint16_t_be2host(n)  (uint16_t_byteorder_swap(n))
  69 #define uint32_t_be2host(n)  (uint32_t_byteorder_swap(n))
  70 #define uint64_t_be2host(n)  (uint64_t_byteorder_swap(n))
  71
  72 #define host2uint16_t_le(n)  (n)
  73 #define host2uint32_t_le(n)  (n)
  74 #define host2uint64_t_le(n)  (n)
  75
  76 #define host2uint16_t_be(n)  (uint16_t_byteorder_swap(n))
  77 #define host2uint32_t_be(n)  (uint32_t_byteorder_swap(n))
  78 #define host2uint64_t_be(n)  (uint64_t_byteorder_swap(n))
  79
  80 #endif
  81
  82 #define htons(n)  host2uint16_t_be((n))
  83 #define htonl(n)  host2uint32_t_be((n))
  84 #define ntohs(n)  uint16_t_be2host((n))
  85 #define ntohl(n)  uint32_t_be2host((n))
  86
  87 #define uint8_t_be2host(n)  (n)
  88 #define uint8_t_le2host(n)  (n)
  89 #define host2uint8_t_be(n)  (n)
  90 #define host2uint8_t_le(n)  (n)
  91 #define host2uint8_t_le(n)  (n)
  92
  93 #define  int8_t_le2host(n)  uint8_t_le2host(n)
  94 #define int16_t_le2host(n) uint16_t_le2host(n)
  95 #define int32_t_le2host(n) uint32_t_le2host(n)
  96 #define int64_t_le2host(n) uint64_t_le2host(n)
  97
  98 #define  int8_t_be2host(n)  uint8_t_be2host(n)
  99 #define int16_t_be2host(n) uint16_t_be2host(n)
 100 #define int32_t_be2host(n) uint32_t_be2host(n)
 101 #define int64_t_be2host(n) uint64_t_be2host(n)
 102
 103 #define  host2int8_t_le(n)  host2uint8_t_le(n)
 104 #define host2int16_t_le(n) host2uint16_t_le(n)
 105 #define host2int32_t_le(n) host2uint32_t_le(n)
 106 #define host2int64_t_le(n) host2uint64_t_le(n)
 107
 108 #define  host2int8_t_be(n)  host2uint8_t_be(n)
 109 #define host2int16_t_be(n) host2uint16_t_be(n)
 110 #define host2int32_t_be(n) host2uint32_t_be(n)
 111 #define host2int64_t_be(n) host2uint64_t_be(n)
 112
 113 static inline uint64_t uint64_t_byteorder_swap(uint64_t n)
 114 {
 115         return ((n & 0xff) << 56) |
 116             ((n & 0xff00) << 40) |
 117             ((n & 0xff0000) << 24) |
 118             ((n & 0xff000000LL) << 8) |
 119             ((n & 0xff00000000LL) >> 8) |
 120             ((n & 0xff0000000000LL) >> 24) |
 121             ((n & 0xff000000000000LL) >> 40) |
 122             ((n & 0xff00000000000000LL) >> 56);
 123 }
 124
 125 static inline uint32_t uint32_t_byteorder_swap(uint32_t n)
 126 {
 127         return ((n & 0xff) << 24) |
 128             ((n & 0xff00) << 8) |
 129             ((n & 0xff0000) >> 8) |
 130             ((n & 0xff000000) >> 24);
 131 }
 132
 133 static inline uint16_t uint16_t_byteorder_swap(uint16_t n)
 134 {
 135         return ((n & 0xff) << 8) |
 136             ((n & 0xff00) >> 8);
 137 }
 138
 139 #endif
 140
 141 /** @}
 142  */