dist/ipf/lib/count6bits.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2000-2001 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * Id: count6bits.c,v 1.4.4.1 2006/06/16 17:20:57 darrenr Exp
   9  */
  10
  11 #include "ipf.h"
  12
  13
  14 int count6bits(msk)
  15 u_32_t *msk;
  16 {
  17         int i = 0, k;
  18         u_32_t j;
  19
  20         for (k = 3; k >= 0; k--)
  21                 if (msk[k] == 0xffffffff)
  22                         i += 32;
  23                 else {
  24                         for (j = msk[k]; j; j <<= 1)
  25                                 if (j & 0x80000000)
  26                                         i++;
  27                 }
  28         return i;
  29 }