Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!sdrc!scjones
From: scjones@sdrc.UUCP (Larry Jones)
Newsgroups: comp.lang.c
Subject: Re: Is "if (!pointer)" as portable as "if (pointer == NULL)" ???
Keywords: portability, pointers, NULL
Message-ID: <1283@sdrc.UUCP>
Date: 11 Apr 90 21:59:51 GMT
References: <656@hades.OZ>
Organization: SDRC, Cincinnati
Lines: 16

In article <656@hades.OZ>, greyham@hades.OZ (Greyham Stoney) writes:
> Is this correct?. Can I just do:
> 	if (buffer) free(buffer)
> And stuff like that?.

Yes.  A null pointer is guaranteed to compare equal to zero, so
if (ptr) and if (!ptr) are completely portable.  Many will debate
whether they are stylistically good or bad, but they definitely
are portable.
----
Larry Jones                         UUCP: uunet!sdrc!scjones
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