usr/src/cmd/ipf/lib/common/count6bits.c

   1 /*
   2  * Copyright (C) 1993-2001 by Darren Reed.
   3  *
   4  * See the IPFILTER.LICENCE file for details on licencing.
   5  *
   6  * $Id: count6bits.c,v 1.4 2001/06/09 17:09:23 darrenr Exp $
   7  */
   8
   9 #include "ipf.h"
  10
  11
  12 int count6bits(msk)
  13 u_32_t *msk;
  14 {
  15         int i = 0, k;
  16         u_32_t j;
  17
  18         for (k = 3; k >= 0; k--)
  19                 if (msk[k] == 0xffffffff)
  20                         i += 32;
  21                 else {
  22                         for (j = msk[k]; j; j <<= 1)
  23                                 if (j & 0x80000000)
  24                                         i++;
  25                 }
  26         return i;
  27 }