FFS

Section: Linux Programmer's Manual (3)
Updated: April 13, 1993
 

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