endianess.h

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#ifndef __ENDIANESS_HANDLER__
 
  /* The following is based on xorg/xserver/GL/glx/glxbyteorder.h
   * which is (c) IBM Corp. 2006,2007 and originally licensed under the following
   * BSD-license. All modifications in navit are licensed under the GNU GPL as
   * described in file "COPYRIGHT".
   *
   * Portions also from GNU C Library include/bits/byteswap.h Also licsend
   * under the GPL.
   *
   * --------------------------
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sub license,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDERS, THE AUTHORS, AND/OR THEIR SUPPLIERS BE LIABLE FOR
   * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
   * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
#if HAVE_BYTESWAP_H
  /* machine dependent versions of byte swapping functions.  GNU extension.*/
  #include <byteswap.h>
#if HAVE_ENDIAN_H
  #include <endian.h>
#endif
#elif defined(USE_SYS_ENDIAN_H)
  #include <sys/endian.h>
#if defined(_BYTE_ORDER) && !defined(__BYTE_ORDER)
#define __BYTE_ORDER _BYTE_ORDER
#define __LITTLE_ENDIAN _LITTLE_ENDIAN
#define __BIG_ENDIAN _BIG_ENDIAN
#endif
#elif defined(__APPLE__)
  #include <libkern/OSByteOrder.h>
  #define __bswap_16 OSSwapInt16
  #define __bswap_32 OSSwapInt32
  #define __bswap_64 OSSwapInt64
 
#ifndef __BYTE_ORDER
  #define __LITTLE_ENDIAN 1234
  #define __BIG_ENDIAN 4321
 
  #if defined(__LITTLE_ENDIAN__)
    #define __BYTE_ORDER __LITTLE_ENDIAN
  #elif defined(__BIG_ENDIAN__)
    #define __BYTE_ORDER __BIG_ENDIAN
  #else
    #error "No endianness defined for Mac OS!"
  #endif
#endif
 
#elif  defined(_WIN32) || defined(__CEGCC__)
  #define __BIG_ENDIAN 4321
  #define __LITTLE_ENDIAN 1234
  #define __BYTE_ORDER __LITTLE_ENDIAN
#else
  #define __bswap_16(__bsx) ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8))
  #define __bswap_32(__bsx) ((((__bsx) & 0xff000000) >> 24) | \
                             (((__bsx) & 0x00ff0000) >>  8) |\
                             (((__bsx) & 0x0000ff00) <<  8) | \
                             (((__bsx) & 0x000000ff) << 24))
 
 
#endif
 
#if  __BYTE_ORDER == __BIG_ENDIAN
  #define le16_to_cpu(x)        __bswap_16 (x)
  #define le32_to_cpu(x)        __bswap_32 (x)
  #define le64_to_cpu(x)        __bswap_64 (x)
  #define cpu_to_le16(x)        __bswap_16 (x)
  #define cpu_to_le32(x)        __bswap_32 (x)
  #define cpu_to_le64(x)        __bswap_64 (x)
#elif __BYTE_ORDER == __LITTLE_ENDIAN
  #define le16_to_cpu(x)        (x)
  #define le32_to_cpu(x)        (x)
  #define cpu_to_le16(x)        (x)
  #define cpu_to_le32(x)        (x)
#else
  #error "Unknown endianess"
#endif
 
#define __ENDIANESS_HANDLER__
#endif