ffs

FFS(3)                     Linux Programmer's Manual                    FFS(3)



NAME
       ffs - find first bit set in a word

SYNOPSIS
       #include <strings.h>

       int ffs(int i);

DESCRIPTION
       The  ffs()  function  returns  the position of the first bit set in the
       word i.  The least significant bit is position 1 and the most  signifi-
       cant position e.g. 32 or 64.

RETURN VALUE
       The  ffs()  function returns the position of the first bit set, or 0 if
       no bits are set.

CONFORMING TO
       BSD 4.3, POSIX 1003.1-2001.

NOTES
       BSD systems have a prototype in <string.h>.



GNU                               2001-12-20                            FFS(3)