FFS(3) Library Functions Manual FFS(3)

NAME

ffs — find first set bit

SYNOPSIS

#include <strings.h>

int ffs(int i);

DESCRIPTION

The ffs() function finds the first bit set (beginning with the least significant bit) and returns the index of that bit. Bits are numbered starting at one (the least significant bit).

RETURN VALUE

The ffs() function returns the index of the first bit set. If i is 0, then ffs() returns 0.

ERRORS

No errors are defined.

EXAMPLES

None.

APPLICATION USAGE

None.

FUTURE DIRECTIONS

None.