ffs.3c (ed22c7109fc5dd9e1b7a5d0333bdc7ad2718e2ab) ffs.3c (e232d9863a8486cf94eaa4bc06c2e9ff52bf3140)
1'\" te
1'\" te
2.\" Copyright (c) 2014, Joyent, Inc.
2.\" Copyright 1989 AT&T Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved Portions Copyright (c) 1992, X/Open Company Limited All Rights Reserved
3.\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
4.\" http://www.opengroup.org/bookstore/.
5.\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
6.\" This notice shall appear on any product containing this material.
7.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
8.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
9.\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
10.TH FFS 3C "Jul 24, 2002"
11.SH NAME
12ffs \- find first set bit
13.SH SYNOPSIS
14.LP
15.nf
16#include <strings.h>
17
3.\" Copyright 1989 AT&T Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved Portions Copyright (c) 1992, X/Open Company Limited All Rights Reserved
4.\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
5.\" http://www.opengroup.org/bookstore/.
6.\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
7.\" This notice shall appear on any product containing this material.
8.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
9.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
10.\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
11.TH FFS 3C "Jul 24, 2002"
12.SH NAME
13ffs \- find first set bit
14.SH SYNOPSIS
15.LP
16.nf
17#include <strings.h>
18
18\fBint\fR \fBffs\fR(\fBconst int\fR \fIi\fR);
19\fBint\fR \fBffs\fR(\fBint\fR \fIi\fR);
20
21\fBint\fR \fBffsl\fR(\flong\fR \fIi\fR);
22
23\fBint\fR \fBffsll\fR(\fBlong long\fR \fIi\fR);
24
25\fBint\fR \fBfls\fR(\fBint\fR \fIi\fR);
26
27\fBint\fR \fBflsl\fR(\fBlong\fR \fIi\fR);
28
29\fBint\fR \fBflsl\fR(\fBlong long\fR \fIi\fR);
19.fi
20
21.SH DESCRIPTION
30.fi
31
32.SH DESCRIPTION
33.LP
34The \fBffs()\fR, \fBffsl()\, and \fBffsll()\fR functions finds the first bit set
35(beginning with the least significant bit) and return the index of that bit.
36Bits are numbered starting at one (the least significant bit).
22.sp
23.LP
37.sp
38.LP
24The \fBffs()\fR function finds the first bit set (beginning with the least
25significant bit) and returns the index of that bit. Bits are numbered starting
26at one (the least significant bit).
39The \fBfls()\fR, \fBflsl()\fR, and \fBflsll()\fR functions find the last bit set
40(beginning with the most significant bit) and return the index of that bit.
41Bits are numbered starting at one (the least significant bit).
27.SH RETURN VALUES
42.SH RETURN VALUES
43.LP
44The \fBffs()\fR, \fBffsl()\fR, and \fBffsll()\fR functions returns the index of
45the first bit set. If \fIi\fR is 0, then they return 0.
28.sp
29.LP
46.sp
47.LP
30The \fBffs()\fR function returns the index of the first bit set. If \fIi\fR is
310, then \fBffs()\fR returns 0.
48The \fBfls()\fR, \fBflsl()\fR, and \fBflsll()\fR functions return the index of
49the last bit set. If \fIi\fR is 0, then they return 0.
32.SH ERRORS
50.SH ERRORS
33.sp
34.LP
35No errors are defined.
36.SH ATTRIBUTES
51.LP
52No errors are defined.
53.SH ATTRIBUTES
37.sp
38.LP
39See \fBattributes\fR(5) for descriptions of the following attributes:
40.sp
41
42.sp
43.TS
44box;
45c | c
46l | l .
47ATTRIBUTE TYPE ATTRIBUTE VALUE
48_
54.LP
55See \fBattributes\fR(5) for descriptions of the following attributes:
56.sp
57
58.sp
59.TS
60box;
61c | c
62l | l .
63ATTRIBUTE TYPE ATTRIBUTE VALUE
64_
49Interface Stability Standard
65Interface Stability Committed
50_
51MT-Level MT-Safe
52.TE
53
54.SH SEE ALSO
66_
67MT-Level MT-Safe
68.TE
69
70.SH SEE ALSO
55.sp
56.LP
57\fBattributes\fR(5), \fBstandards\fR(5)
71.LP
72\fBattributes\fR(5), \fBstandards\fR(5)