Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!wgate!lanzo
From: lanzo@wgate.UUCP (Mark Lanzo)
Newsgroups: comp.lang.c
Subject: Re: IsUnsigned function? [A solution which almost works!]
Message-ID: <106@atesysv.UUCP>
Date: 26 Jul 90 13:17:38 GMT
References: <15303b1aa0bf26a8c5d4@canremote.uucp>
Reply-To: lanzo@atesysv.UUCP (Mark Lanzo)
Organization: Wandel & Goltermann Technologies, RTP, NC
Lines: 15

My boss thought this one up:

	#define IsUnsigned(x) (!( (x) < 0 || (-(x) < 0) ))

This will work, as long as "x" is a nonzero value.

At least this one tries to answer the actual question "Is it unsigned?" and
not "is it negative?" or "is the m.s.b. set?" ...


-- 
Mark Lanzo                      Wandel & Goltermann Technologies, Inc.
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