include/linux/bcd.h

   1 #ifndef _BCD_H
   2 #define _BCD_H
   3
   4 #include <linux/compiler.h>
   5
   6 #define bcd2bin(x)                                      \
   7                 (__builtin_constant_p((u8 )(x)) ?       \
   8                 const_bcd2bin(x) :                      \
   9                 _bcd2bin(x))
  10
  11 #define bin2bcd(x)                                      \
  12                 (__builtin_constant_p((u8 )(x)) ?       \
  13                 const_bin2bcd(x) :                      \
  14                 _bin2bcd(x))
  15
  16 #define const_bcd2bin(x)        (((x) & 0x0f) + ((x) >> 4) * 10)
  17 #define const_bin2bcd(x)        ((((x) / 10) << 4) + (x) % 10)
  18
  19 unsigned _bcd2bin(unsigned char val) __attribute_const__;
  20 unsigned char _bin2bcd(unsigned val) __attribute_const__;
  21
  22 #endif /* _BCD_H */