2.11BSD#431 - /usr/src/lib/libc/gen/ffs.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #if defined(LIBC_SCCS) && !defined(lint)
   8: static char sccsid[] = "@(#)ffs.c	1.1 (Berkeley) 1/19/87";
   9: #endif LIBC_SCCS and not lint
  10: 
  11: /*
  12:  * ffs -- vax ffs instruction
  13:  */
  14: ffs(mask)
  15:     register long mask;
  16: {
  17:     register int cnt;
  18: 
  19:     if (mask == 0)
  20:         return(0);
  21:     for (cnt = 1; !(mask&1); cnt++)
  22:         mask >>= 1;
  23:     return(cnt);
  24: }

Defined functions

Defined variables