libomfs/config.h

   1 #ifndef _CONFIG_H
   2 #define _CONFIG_H
   3
   4 #include <inttypes.h>
   5
   6 typedef unsigned char u8;
   7 typedef uint16_t u16;
   8 typedef uint32_t u32;
   9 typedef uint64_t u64;
  10
  11 typedef char s8;
  12 typedef int16_t s16;
  13 typedef int32_t s32;
  14 typedef int64_t s64;
  15
  16 typedef u64 __be64;
  17 typedef u32 __be32;
  18 typedef u16 __be16;
  19
  20 #if __BYTE_ORDER == __BIG_ENDIAN
  21 #define swap_be64(a) (a)
  22 #define swap_be32(a) (a)
  23 #define swap_be16(a) (a)
  24 #else
  25 #define swap_be64(a) __swap64(a)
  26 #define swap_be32(a) __swap32(a)
  27 #define swap_be16(a) __swap16(a)
  28 #endif
  29
  30 static inline u16 __swap16(u16 a)
  31 {
  32         return (((a & 0xff00) >> 8) |
  33                 ((a & 0x00ff) << 8));
  34 }
  35
  36 static inline u32 __swap32(u32 a)
  37 {
  38         return (((a & 0xff000000U) >> 24) |
  39                 ((a & 0x00ff0000U) >> 8) |
  40                 ((a & 0x0000ff00U) << 8) |
  41                 ((a & 0x000000ffU) << 24));
  42 }
  43
  44 static inline u64 __swap64(u64 a)
  45 {
  46         return (((a & 0xff00000000000000ULL) >> 56) |
  47                 ((a & 0x00ff000000000000ULL) >> 40) |
  48                 ((a & 0x0000ff0000000000ULL) >> 24) |
  49                 ((a & 0x000000ff00000000ULL) >> 8)  |
  50                 ((a & 0x00000000ff000000ULL) << 8)  |
  51                 ((a & 0x0000000000ff0000ULL) << 24) |
  52                 ((a & 0x000000000000ff00ULL) << 40) |
  53                 ((a & 0x00000000000000ffULL) << 56));
  54 }
  55
  56
  57 #endif /* _CONFIG_H */