LXR linux/include/linux/bcd.h

   1/* Permission is hereby granted to copy, modify and redistribute this code
   2 * in terms of the GNU Library General Public License, Version 2 or later,
   3 * at your option.
   4 */
   5
   6/* macros to translate to/from binary and binary-coded decimal (frequently
   7 * found in RTC chips).
   8 */
   9
  10#ifndef _BCD_H
  11#define _BCD_H
  12
  13#define BCD2BIN(val)    (((val) & 0x0f) + ((val)>>4)*10)
  14#define BIN2BCD(val)    ((((val)/10)<<4) + (val)%10)
  15
  16/* backwards compat */
  17#define BCD_TO_BIN(val) ((val)=BCD2BIN(val))
  18#define BIN_TO_BCD(val) ((val)=BIN2BCD(val))
  19
  20#endif /* _BCD_H */
  21