[src/uebayasi-xip]: src/share/man/man9 Reference bitstring(3).

[jruoho <jruoho%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/10cba0739f33
branches:  uebayasi-xip
changeset: 751618:10cba0739f33
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Tue Mar 02 06:37:12 2010 +0000

description:
Reference bitstring(3).

diffstat:

 share/man/man9/setbit.9 |  82 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 82 insertions(+), 0 deletions(-)

diffs (86 lines):

diff -r 6335a703fc59 -r 10cba0739f33 share/man/man9/setbit.9
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+++ b/share/man/man9/setbit.9   Tue Mar 02 06:37:12 2010 +0000
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+.\" $NetBSD: setbit.9,v 1.2.2.2 2010/03/02 06:37:12 jruoho Exp $
+.\"
+.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Jukka Ruohonen.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd March 1, 2010
+.Dt SETBIT 9
+.Os
+.Sh NAME
+.Nm setbit
+.Nd macros related to bitmaps
+.Sh SYNOPSIS
+.In sys/param.h
+.Ft void
+.Fn setbit "array" "x"
+.Ft void
+.Fn clrbit "array" "x"
+.Ft int
+.Fn isset "array" "x"
+.Ft int
+.Fn isclr "array" "x"
+.Sh DESCRIPTION
+The
+.Nm
+family of macros operate with bitmaps, also known as bit arrays.
+.Pp
+In a nutshell,
+.Fn setbit
+sets the bit
+.Fa x
+in
+.Fa array ,
+.Fn clrbit
+clears it,
+.Fn isset
+tests whether
+.Fa x
+is set, and
+.Fn isclr
+returns 1 if
+.Fa x
+is not set.
+.Sh EXAMPLES
+The following example declares a buffer of 10 chars,
+treating it as an array of 80 bits:
+.Bd -literal -offset indent
+char buf[10];
+
+\&...
+
+setbit(buf, 12);       /* set the fifth bit in the second byte */
+.Ed
+.Sh SEE ALSO
+.Xr bitstring 3
+.Sh CAVEATS
+The number of valid bits in a given array is assumed to be multiple of
+.Dv CHAR_BIT ,
+the number of bits for smallest object that is not a bit-field.