From owner-freebsd-current  Mon Mar 13  8:31:59 2000
Delivered-To: freebsd-current@freebsd.org
Received: from wall.polstra.com (rtrwan160.accessone.com [206.213.115.74])
	by hub.freebsd.org (Postfix) with ESMTP id 84FAB37C0FD
	for <current@freebsd.org>; Mon, 13 Mar 2000 08:31:55 -0800 (PST)
	(envelope-from jdp@polstra.com)
Received: from vashon.polstra.com (vashon.polstra.com [206.213.73.13])
	by wall.polstra.com (8.9.3/8.9.3) with ESMTP id IAA10753;
	Mon, 13 Mar 2000 08:31:52 -0800 (PST)
	(envelope-from jdp@polstra.com)
From: John Polstra <jdp@polstra.com>
Received: (from jdp@localhost)
	by vashon.polstra.com (8.9.3/8.9.1) id IAA52433;
	Mon, 13 Mar 2000 08:31:51 -0800 (PST)
	(envelope-from jdp@polstra.com)
Date: Mon, 13 Mar 2000 08:31:51 -0800 (PST)
Message-Id: <200003131631.IAA52433@vashon.polstra.com>
To: bde@zeta.org.au
Subject: Re: MAX_UID ?
In-Reply-To: <Pine.BSF.4.21.0003131708430.931-100000@alphplex.bde.org>
References: <Pine.BSF.4.21.0003131708430.931-100000@alphplex.bde.org>
Organization: Polstra & Co., Seattle, WA
Cc: current@freebsd.org
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

In article <Pine.BSF.4.21.0003131708430.931-100000@alphplex.bde.org>,
Bruce Evans  <bde@zeta.org.au> wrote:
> 
> I would prefer standard maxof() and minof() interfaces that work on
> any arithmetic type.  These can almost be written in portable C, at
> least in C89 where types are restricted to char, signed char, ...,
> long double:
> 
> #define isfloat(type)	((type)0.5 != 0)
> #define issigned(type)	((type)-1 < 0)
> #define isschar(type)	(!isfloat(type) && issigned(type) && sizeof(type) == 1)
> #define isuchar(type)	(!isfloat(type) && !issigned(type) && sizeof(type) == 1)
> ...
> #define maxof(type)	((type)(isschar(type) ? SCHAR_MAX :
> 				isuchar(type) ? UCHAR_MAX ...))

I like this idea.

John


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message