sys/lib/libkern/bcd.c

   1 /* $NetBSD$ */
   2
   3 /*
   4  * Convert a single byte between (unsigned) packed bcd and binary.
   5  * Public domain.
   6  */
   7
   8 #include <sys/cdefs.h>
   9 __KERNEL_RCSID(0,"$NetBSD$");
  10
  11 #include <lib/libkern/libkern.h>
  12
  13 unsigned int
  14 bcdtobin(unsigned int bcd)
  15 {
  16
  17         return (((bcd >> 4) & 0x0f) * 10 + (bcd & 0x0f));
  18 }
  19
  20 unsigned int
  21 bintobcd(unsigned int bin)
  22 {
  23
  24         return ((((bin / 10) << 4) & 0xf0) | (bin % 10));
  25 }