ffs - find first bit set in a word


SYNOPSIS

       #include <string.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 significant position 32.


RETURN VALUE

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


CONFORMING TO

       BSD 4.3