FFS

Section: Linux Programmer's Manual (3)
Updated: April 13, 1993
Index Return to Main Contents
 

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
CONFORMING TO

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