orte/include/rtps_endian.h

   1 #ifndef RTPS_ENDIAN_H
   2 #define RTPS_ENDIAN_H 1
   3
   4 #define FLAG_BIG_ENDIAN 0
   5 #define FLAG_LITTLE_ENDIAN 1
   6
   7 #if WORDS_BIGENDIAN
   8
   9 # define FLAG_ENDIANNESS FLAG_BIG_ENDIAN
  10 # define conversion_needed(to_endianness) ((to_endianness)!=FLAG_BIG_ENDIAN)
  11
  12 #else
  13
  14 # define FLAG_ENDIANNESS FLAG_LITTLE_ENDIAN
  15 # define conversion_needed(to_endianness) ((to_endianness)!=FLAG_LITTLE_ENDIAN)
  16
  17 #endif
  18
  19 static inline
  20 void rtps_byteswap(uint8_t *outdata,
  21                           const uint8_t *data,
  22                           uint32_t datalen)
  23 {
  24   const uint8_t *source_ptr = data;
  25   uint8_t *dest_ptr = outdata + datalen - 1;
  26   while(dest_ptr >= outdata)
  27     *dest_ptr-- = *source_ptr++;
  28 }
  29
  30
  31 #endif /* FLAG_ENDIANNESS */