g_src/endian.h

   1 #ifndef ENDIAN_H
   2 #define ENDIAN_H
   3
   4 inline unsigned short byteswap(unsigned short x)
   5 {
   6 #if defined(__ppc__) || defined(__ppc64__)
   7        return (x << 8 | x >> 8);
   8 #else
   9        return x;
  10 #endif
  11 }
  12
  13 inline unsigned long byteswap(unsigned long x)
  14 {
  15 #if defined(__ppc__) || defined(__ppc64__)
  16        return
  17                ( (x << 24) & 0xFF000000) |
  18                ( (x <<  8) & 0x00FF0000) |
  19                ( (x >>  8) & 0x0000FF00) |
  20                ( (x >> 24) & 0x000000FF) ;
  21 #else
  22        return x;
  23 #endif
  24 }
  25
  26 inline unsigned int byteswap(unsigned int x)
  27 {
  28 #if defined(__ppc__) || defined(__ppc64__)
  29        return
  30                ( (x << 24) & 0xFF000000) |
  31                ( (x <<  8) & 0x00FF0000) |
  32                ( (x >>  8) & 0x0000FF00) |
  33                ( (x >> 24) & 0x000000FF) ;
  34 #else
  35        return x;
  36 #endif
  37 }
  38
  39 inline short byteswap(short x) { return byteswap( (unsigned short) x ); }
  40 inline long byteswap(long x) { return byteswap( (unsigned long) x ); }
  41 inline int byteswap(int x) { return byteswap( (unsigned int) x ); }
  42 #endif