NAME

     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