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-.\" Copyright (c) 1990, 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Chris Torek.
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)ffs.3	8.2 (Berkeley) 4/19/94
-.\" $FreeBSD: src/lib/libc/string/ffs.3,v 1.9 2004/06/30 20:09:09 ru Exp $
-.\"
-.Dd January 13, 2004
-.Dt FFS 3
-.Os
-.Sh NAME
-.Nm ffs ,
-.Nm ffsl ,
-.Nm fls ,
-.Nm flsl
-.Nd find first or last bit set in a bit string
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In strings.h
-.Ft int
-.Fn ffs "int i"
-.Ft int
-.Fn ffsl "long i"
-.Ft int
-.Fn fls "int i"
-.Ft int
-.Fn flsl "long i"
-.Sh DESCRIPTION
-The
-.Fn ffs
-and
-.Fn ffsl
-functions find the first bit set in
-.Fa i
-and return the index of that bit.
-.Pp
-The
-.Fn fls
-and
-.Fn flsl
-functions find the last bit set in
-.Fa i
-and return the index of that bit.
-.Pp
-Bits are numbered starting from 1, starting at the right-most
-(least significant) bit.
-A return value of zero from any of these functions means that the
-argument was zero.
-.Sh SEE ALSO
-.Xr bitstring 3
-.Sh HISTORY
-The
-.Fn ffs
-function appeared in
-.Bx 4.3 .
-Its prototype existed previously in
-.In string.h
-before it was moved to
-.In strings.h
-for
-.St -p1003.1-2001
-compliance.
-.Pp
-The
-.Fn ffsl ,
-.Fn fls ,
-and
-.Fn flsl
-functions appeared in
-.Fx 5.3 .