glx/glxbyteorder.h

   1 /*
   2  * (C) Copyright IBM Corporation 2006, 2007
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDERS, THE AUTHORS, AND/OR THEIR SUPPLIERS BE LIABLE FOR
  20  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  21  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  22  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file glxbyteorder.h
  27  * Platform glue for handling byte-ordering issues in GLX protocol.
  28  *
  29  * \author Ian Romanick <idr@us.ibm.com>
  30  */
  31 #if !defined(__GLXBYTEORDER_H__)
  32 #define __GLXBYTEORDER_H__
  33
  34 #ifdef HAVE_DIX_CONFIG_H
  35 #include <dix-config.h>
  36 #endif
  37
  38 #if HAVE_BYTESWAP_H
  39 #include <byteswap.h>
  40 #elif defined(USE_SYS_ENDIAN_H)
  41 #include <sys/endian.h>
  42 #elif defined(__APPLE__)
  43 #include <libkern/OSByteOrder.h>
  44 #define bswap_16 OSSwapInt16
  45 #define bswap_32 OSSwapInt32
  46 #define bswap_64 OSSwapInt64
  47 #else
  48 #define bswap_16(value)  \
  49         ((((value) & 0xff) << 8) | ((value) >> 8))
  50
  51 #define bswap_32(value) \
  52         (((uint32_t)bswap_16((uint16_t)((value) & 0xffff)) << 16) | \
  53         (uint32_t)bswap_16((uint16_t)((value) >> 16)))
  54
  55 #define bswap_64(value) \
  56         (((uint64_t)bswap_32((uint32_t)((value) & 0xffffffff)) \
  57             << 32) | \
  58         (uint64_t)bswap_32((uint32_t)((value) >> 32)))
  59 #endif
  60
  61 #endif                          /* !defined(__GLXBYTEORDER_H__) */