LXR linux/include/linux/bcd.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _BCD_H
   3#define _BCD_H
   4
   5#include <linux/compiler.h>
   6
   7#define bcd2bin(x)                                      \
   8                (__builtin_constant_p((u8 )(x)) ?       \
   9                const_bcd2bin(x) :                      \
  10                _bcd2bin(x))
  11
  12#define bin2bcd(x)                                      \
  13                (__builtin_constant_p((u8 )(x)) ?       \
  14                const_bin2bcd(x) :                      \
  15                _bin2bcd(x))
  16
  17#define const_bcd2bin(x)        (((x) & 0x0f) + ((x) >> 4) * 10)
  18#define const_bin2bcd(x)        ((((x) / 10) << 4) + (x) % 10)
  19
  20unsigned _bcd2bin(unsigned char val) __attribute_const__;
  21unsigned char _bin2bcd(unsigned val) __attribute_const__;
  22
  23#endif /* _BCD_H */
  24