.\" $NetBSD: SET.9,v 1.5 2015/12/13 23:32:52 wiz Exp $
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.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jukka Ruohonen.
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.Dd December 13, 2015
.Dt SET 9
.Os
.Sh NAME
.Nm SET
.Nd primitive bit macros
.Sh SYNOPSIS
.In sys/types.h
.Ft void
.Fn SET "val" "x"
.Ft int
.Fn ISSET "val" "x"
.Ft void
.Fn CLR "val" "x"
.Sh DESCRIPTION
These macros define three standard bit operations:
.Bl -enum -offset indent
.It
.Fn SET
sets the set bits from
.Fa x
in
.Fa val ;
.It
.Fn CLR
clears the set bits from
.Fa x
in
.Fa val ;
and
.It
.Fn ISSET
returns true if any of the set bits from
.Fa x
are set in
.Fa val .
.El
.Sh SEE ALSO
.Xr bits 3
.Sh BUGS
The rationale is to provide clarity in the source code,
but arguably these operations are clear enough without the use of the macros.