/* Permission is hereby granted to copy, modify and redistribute this code
   * in terms of the GNU Library General Public License, Version 2 or later,
   * at your option.
   */
  
  /* macros to translate to/from binary and binary-coded decimal (frequently
   * found in RTC chips).
   */
  
  #ifndef _BCD_H
  #define _BCD_H
  
  #define BCD2BIN(val)	(((val) & 0x0f) + ((val)>>4)*10)
  #define BIN2BCD(val)	((((val)/10)<<4) + (val)%10)
  
  /* backwards compat */
  #define BCD_TO_BIN(val) ((val)=BCD2BIN(val))
  #define BIN_TO_BCD(val) ((val)=BIN2BCD(val))
  
  #endif /* _BCD_H */