NAME    [Toc]    [Back]

     ffs - find first bit set in a bit string

SYNOPSIS    [Toc]    [Back]

     #include <string.h>

     int
     ffs(int value);

DESCRIPTION    [Toc]    [Back]

     The ffs() function finds the first bit set in value and  returns the index
     of that bit.  Bits are numbered starting from 1, starting at
the rightmost
 bit.  A return value of 0 means that the  argument  was
zero.

SEE ALSO    [Toc]    [Back]

     bitstring(3)

HISTORY    [Toc]    [Back]

     The ffs() function appeared in 4.3BSD.

OpenBSD      3.6                          April      19,     1991