NAME

ffs − Find first set bit

SYNOPSIS

#include <strings.h>
int ffs(
        int pattern );

LIBRARY

Standard C Library (libc)

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

ffs():  XPG4-UNIX

Refer to the standards(5) reference page for more information about industry standards and associated tags. 

PARAMETERS

pattern
Specifies the bit pattern searched.

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 1 (the least significant bit). If pattern is 0 (zero), ffs() returns 0. 

SEE ALSO

Standards: standards(5)