kpartx/byteorder.h

   1 #ifndef BYTEORDER_H_INCLUDED
   2 #define BYTEORDER_H_INCLUDED
   3
   4 #ifdef __linux__
   5 #  include <endian.h>
   6 #  include <byteswap.h>
   7 #else
   8 #  error unsupported
   9 #endif
  10
  11 #if BYTE_ORDER == LITTLE_ENDIAN
  12 #  define le16_to_cpu(x) (x)
  13 #  define be16_to_cpu(x) bswap_16(x)
  14 #  define le32_to_cpu(x) (x)
  15 #  define le64_to_cpu(x) (x)
  16 #  define be32_to_cpu(x) bswap_32(x)
  17 #  define be64_to_cpu(x) bswap_64(x)
  18 #elif BYTE_ORDER == BIG_ENDIAN
  19 #  define le16_to_cpu(x) bswap_16(x)
  20 #  define be16_to_cpu(x) (x)
  21 #  define le32_to_cpu(x) bswap_32(x)
  22 #  define le64_to_cpu(x) bswap_64(x)
  23 #  define be32_to_cpu(x) (x)
  24 #  define be64_to_cpu(x) (x)
  25 #else
  26 #  error unsupported
  27 #endif
  28
  29 #endif                          /* BYTEORDER_H_INCLUDED */