orte/include/rtps_endian.h

   1 #ifndef RTPS_ENDIAN_H
   2 #define RTPS_ENDIAN_H 1
   3
   4 #include "orte/orte_config.h"
   5
   6 #define FLAG_BIG_ENDIAN 0
   7 #define FLAG_LITTLE_ENDIAN 1
   8
   9 #if WORDS_BIGENDIAN
  10
  11 # define FLAG_ENDIANNESS FLAG_BIG_ENDIAN
  12 # define conversion_needed(to_endianness) ((to_endianness)!=FLAG_BIG_ENDIAN)
  13
  14 #else
  15
  16 # define FLAG_ENDIANNESS FLAG_LITTLE_ENDIAN
  17 # define conversion_needed(to_endianness) ((to_endianness)!=FLAG_LITTLE_ENDIAN)
  18
  19 #endif
  20
  21 static inline
  22 void rtps_byteswap(uint8_t *outdata,
  23                           const uint8_t *data,
  24                           uint32_t datalen)
  25 {
  26   const uint8_t *source_ptr = data;
  27   uint8_t *dest_ptr = outdata + datalen - 1;
  28   while(dest_ptr >= outdata)
  29     *dest_ptr-- = *source_ptr++;
  30 }
  31
  32
  33 #endif /* FLAG_ENDIANNESS */