FFS

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
CONFORMING TO

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