include/endian.h

   1 #ifndef _ENDIAN_H
   2 #define _ENDIAN_H
   3
   4 #include <features.h>
   5
   6 #define __NEED_uint16_t
   7 #define __NEED_uint32_t
   8 #define __NEED_uint64_t
   9
  10 #include <bits/alltypes.h>
  11
  12 #define __PDP_ENDIAN 3412
  13
  14 #define BIG_ENDIAN __BIG_ENDIAN
  15 #define LITTLE_ENDIAN __LITTLE_ENDIAN
  16 #define PDP_ENDIAN __PDP_ENDIAN
  17 #define BYTE_ORDER __BYTE_ORDER
  18
  19 static __inline uint16_t __bswap16(uint16_t __x)
  20 {
  21         return __x<<8 | __x>>8;
  22 }
  23
  24 static __inline uint32_t __bswap32(uint32_t __x)
  25 {
  26         return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
  27 }
  28
  29 static __inline uint64_t __bswap64(uint64_t __x)
  30 {
  31         return __bswap32(__x)+0ULL<<32 | __bswap32(__x>>32);
  32 }
  33
  34 #if __BYTE_ORDER == __LITTLE_ENDIAN
  35 #define htobe16(x) __bswap16(x)
  36 #define be16toh(x) __bswap16(x)
  37 #define htobe32(x) __bswap32(x)
  38 #define be32toh(x) __bswap32(x)
  39 #define htobe64(x) __bswap64(x)
  40 #define be64toh(x) __bswap64(x)
  41 #define htole16(x) (uint16_t)(x)
  42 #define le16toh(x) (uint16_t)(x)
  43 #define htole32(x) (uint32_t)(x)
  44 #define le32toh(x) (uint32_t)(x)
  45 #define htole64(x) (uint64_t)(x)
  46 #define le64toh(x) (uint64_t)(x)
  47 #else
  48 #define htobe16(x) (uint16_t)(x)
  49 #define be16toh(x) (uint16_t)(x)
  50 #define htobe32(x) (uint32_t)(x)
  51 #define be32toh(x) (uint32_t)(x)
  52 #define htobe64(x) (uint64_t)(x)
  53 #define be64toh(x) (uint64_t)(x)
  54 #define htole16(x) __bswap16(x)
  55 #define le16toh(x) __bswap16(x)
  56 #define htole32(x) __bswap32(x)
  57 #define le32toh(x) __bswap32(x)
  58 #define htole64(x) __bswap64(x)
  59 #define le64toh(x) __bswap64(x)
  60 #endif
  61
  62 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
  63 #if __BYTE_ORDER == __LITTLE_ENDIAN
  64 #define betoh16(x) __bswap16(x)
  65 #define betoh32(x) __bswap32(x)
  66 #define betoh64(x) __bswap64(x)
  67 #define letoh16(x) (uint16_t)(x)
  68 #define letoh32(x) (uint32_t)(x)
  69 #define letoh64(x) (uint64_t)(x)
  70 #else
  71 #define betoh16(x) (uint16_t)(x)
  72 #define betoh32(x) (uint32_t)(x)
  73 #define betoh64(x) (uint64_t)(x)
  74 #define letoh16(x) __bswap16(x)
  75 #define letoh32(x) __bswap32(x)
  76 #define letoh64(x) __bswap64(x)
  77 #endif
  78 #endif
  79
  80 #endif