client/proxendian.h

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 Hector Martin "marcan" <marcan@marcansoft.com>
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Endianness convenience functions
   9 //-----------------------------------------------------------------------------
  10
  11 #ifndef PROXENDIAN_H__
  12 #define PROXENDIAN_H__
  13
  14 #include <stdint.h>
  15
  16 #ifdef _WIN32
  17 # define HOST_LITTLE_ENDIAN
  18 #else
  19 # include <sys/types.h>
  20 # ifndef BYTE_ORDER
  21 #  define BYTE_ORDER __BYTE_ORDER
  22 #  define LITTLE_ENDIAN __LITTLE_ENDIAN
  23 #  define BIG_ENDIAN __BIG_ENDIAN
  24 # endif
  25 # if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
  26 #  error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
  27 # endif
  28 # if BYTE_ORDER == LITTLE_ENDIAN
  29 #  define HOST_LITTLE_ENDIAN
  30 # endif
  31 #endif
  32
  33 #ifdef HOST_LITTLE_ENDIAN
  34 # define le16(x) (x)
  35 # define le32(x) (x)
  36 #else
  37
  38 static inline uint16_t le16(uint16_t v)
  39 {
  40         return (v>>8) | (v<<8);
  41 }
  42
  43 static inline uint32_t le32(uint32_t v)
  44 {
  45         return (le16(v)<<16) | (le16(v>>16));
  46 }
  47 #endif // HOST_LITTLE_ENDIAN
  48
  49 #endif // PROXENDIAN_H__