opensolaris man page for ffs

ffs(3C) 						   Standard C Library Functions 						   ffs(3C)

NAME
       ffs - find first set bit

SYNOPSIS
       #include <strings.h>

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

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       attributes(5), standards(5)

SunOS 5.11							    24 Jul 2002 							   ffs(3C)