include/endian.h

   1 #ifndef _ENDIAN_H
   2 #define _ENDIAN_H
   3
   4 #include <features.h>
   5
   6 #define __LITTLE_ENDIAN 1234
   7 #define __BIG_ENDIAN 4321
   8 #define __PDP_ENDIAN 3412
   9
  10 #if defined(__GNUC__) && defined(__BYTE_ORDER__)
  11 #define __BYTE_ORDER __BYTE_ORDER__
  12 #else
  13 #include <bits/endian.h>
  14 #endif
  15
  16 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
  17
  18 #define BIG_ENDIAN __BIG_ENDIAN
  19 #define LITTLE_ENDIAN __LITTLE_ENDIAN
  20 #define PDP_ENDIAN __PDP_ENDIAN
  21 #define BYTE_ORDER __BYTE_ORDER
  22
  23 #include <stdint.h>
  24
  25 static __inline uint16_t __bswap16(uint16_t __x)
  26 {
  27         return __x<<8 | __x>>8;
  28 }
  29
  30 static __inline uint32_t __bswap32(uint32_t __x)
  31 {
  32         return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
  33 }
  34
  35 static __inline uint64_t __bswap64(uint64_t __x)
  36 {
  37         return __bswap32(__x)+0ULL<<32 | __bswap32(__x>>32);
  38 }
  39
  40 #if __BYTE_ORDER == __LITTLE_ENDIAN
  41 #define htobe16(x) __bswap16(x)
  42 #define be16toh(x) __bswap16(x)
  43 #define betoh16(x) __bswap16(x)
  44 #define htobe32(x) __bswap32(x)
  45 #define be32toh(x) __bswap32(x)
  46 #define betoh32(x) __bswap32(x)
  47 #define htobe64(x) __bswap64(x)
  48 #define be64toh(x) __bswap64(x)
  49 #define betoh64(x) __bswap64(x)
  50 #define htole16(x) (uint16_t)(x)
  51 #define le16toh(x) (uint16_t)(x)
  52 #define letoh16(x) (uint16_t)(x)
  53 #define htole32(x) (uint32_t)(x)
  54 #define le32toh(x) (uint32_t)(x)
  55 #define letoh32(x) (uint32_t)(x)
  56 #define htole64(x) (uint64_t)(x)
  57 #define le64toh(x) (uint64_t)(x)
  58 #define letoh64(x) (uint64_t)(x)
  59 #else
  60 #define htobe16(x) (uint16_t)(x)
  61 #define be16toh(x) (uint16_t)(x)
  62 #define betoh16(x) (uint16_t)(x)
  63 #define htobe32(x) (uint32_t)(x)
  64 #define be32toh(x) (uint32_t)(x)
  65 #define betoh32(x) (uint32_t)(x)
  66 #define htobe64(x) (uint64_t)(x)
  67 #define be64toh(x) (uint64_t)(x)
  68 #define betoh64(x) (uint64_t)(x)
  69 #define htole16(x) __bswap16(x)
  70 #define le16toh(x) __bswap16(x)
  71 #define letoh16(x) __bswap16(x)
  72 #define htole32(x) __bswap32(x)
  73 #define le32toh(x) __bswap32(x)
  74 #define letoh32(x) __bswap32(x)
  75 #define htole64(x) __bswap64(x)
  76 #define le64toh(x) __bswap64(x)
  77 #define letoh64(x) __bswap64(x)
  78 #endif
  79
  80 #endif
  81
  82 #endif