nsz Git - musl/blob - include/byteswap.h

   1 #ifndef _BYTESWAP_H
   2 #define _BYTESWAP_H
   3
   4 #include <stdint.h>
   5
   6 #if __STDC_VERSION__ >= 199901L
   7 inline
   8 #endif
   9 static uint16_t __bswap_16(uint16_t __x)
  10 {
  11         return __x<<8 | __x>>8;
  12 }
  13
  14 #if __STDC_VERSION__ >= 199901L
  15 inline
  16 #endif
  17 static uint32_t __bswap_32(uint32_t __x)
  18 {
  19         return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
  20 }
  21
  22 #if __STDC_VERSION__ >= 199901L
  23 inline
  24 #endif
  25 static uint64_t __bswap_64(uint64_t __x)
  26 {
  27         return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
  28 }
  29
  30 #define bswap_16(x) __bswap_16(x)
  31 #define bswap_32(x) __bswap_32(x)
  32 #define bswap_64(x) __bswap_64(x)
  33
  34 #endif