From: frsdes@aol.com (FRS DES)
Subject: Re: Programming language vote - results
Date: 1997/12/01
Date: 1997-12-01T00:00:00+00:00 [thread overview]
Message-ID: <19971201145000.JAA23777@ladder02.news.aol.com> (raw)
In-Reply-To: 347F1CAC.6602@gsg.eds.com
In article <347F1CAC.6602@gsg.eds.com>, "Shmuel (Seymour J.) Metz"
<nospam@gsg.eds.com> writes:
>William Tanksley wrote:
> NULL is defined as "(void*)0". I've never seen a
>compiler which failed to
> have (int)NULL be equal to 0 as well, but seeing
>one would not shock me --
> according to K&R 2 (I don't have ANS C available
>right now) ANS doesn't
> explicitly require that.
>
> The worst part of that
>code, as far as I'm concerned, isn't the use of
> pointers as booleans; after
>all, I can't imagine why a vendor would EVER
> make non-zero NULL returns,
>
The obvious reason is to ensure that attempts to use a null pointer
>to
access data will be trapped, instead of producing spurious output
>or
storage overlays. Of course, if the low end of the address space
>is
guarantied to be invalid, then the value 0 will accomplish that, but
often
>0 is a valid address.
Shmuel (Seymour J.) Metz
--
>Shmuel (Seymour J.) Metz
Senior Software SE
This msg has nothing to do with APL. Please trim comp.lang.apl from replies to
this msg, or start a new (non-crossposted) thread.
-David E. Siegel
Software Developer, LEX2000, Inc
(Formerly Financial Reporting Software, or FRS)
FRSdes@AOL.COM
next prev parent reply other threads:[~1997-12-01 0:00 UTC|newest]
Thread overview: 147+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <343fbb5a.0@news.iprolink.ch>
1997-10-11 0:00 ` Programming language vote - results Gary L. Scott
1997-10-12 0:00 ` Jack Rudd
1997-10-13 0:00 ` safetran
1997-10-13 0:00 ` FRS DES
1997-10-13 0:00 ` Jack Rudd
1997-10-14 0:00 ` Philip Brashear
1997-10-14 0:00 ` Gary L. Scott
1997-10-13 0:00 ` Gary L. Scott
1997-10-13 0:00 ` Robert Munck
1997-10-13 0:00 ` Jack Rudd
1997-10-13 0:00 ` Gary L. Scott
[not found] ` <3442B745.5352@lmco.com>
1997-10-15 0:00 ` Gary L. Scott
1997-10-16 0:00 ` James Giles
1997-10-16 0:00 ` Andrew Haley
1997-10-13 0:00 ` David Ness
1997-10-14 0:00 ` Randy MacDonald
1997-10-14 0:00 ` Jan Karman
1997-10-15 0:00 ` Alan E & Carmel J Brain
1997-10-15 0:00 ` D'Arcy J.M. Cain
1997-10-15 0:00 ` FRS DES
1997-10-15 0:00 ` Mark Stephen
1997-10-17 0:00 ` Randy MacDonald
1997-10-16 0:00 ` Alan E & Carmel J Brain
1997-10-16 0:00 ` John Sullivan
1997-10-17 0:00 ` Randy MacDonald
1997-10-17 0:00 ` Alan E & Carmel J Brain
1997-10-17 0:00 ` John Sullivan
1997-10-16 0:00 ` FRS DES
1997-10-17 0:00 ` Jerry van Dijk
1997-10-17 0:00 ` Randy MacDonald
1997-10-20 0:00 ` Alan E & Carmel J Brain
1997-10-20 0:00 ` Lawrence Kirby
1997-10-20 0:00 ` Kaz
1997-10-21 0:00 ` Alan E & Carmel J Brain
1997-10-23 0:00 ` Ada Readability (Re: Programming language vote - results) Ray Blaak
1997-10-21 0:00 ` Programming language vote - results Alan E & Carmel J Brain
1997-10-20 0:00 ` FRS DES
1997-10-21 0:00 ` Alan E & Carmel J Brain
1997-10-21 0:00 ` Randy MacDonald
1997-10-22 0:00 ` Don Guinn
1997-10-29 0:00 ` Randy MacDonald
[not found] ` <01bce1bf$5c2baaa0$95b66bcf@dkelly.ark.com>
1997-10-29 0:00 ` Don Guinn
1997-10-29 0:00 ` Shmuel (Seymour J.) Metz
1997-10-31 0:00 ` Documenting Code (was:Programming language vote - results) Alan E & Carmel J Brain
1997-10-30 0:00 ` Charles Lin
1997-10-30 0:00 ` James L. Ryan
1997-10-31 0:00 ` Robert Bernecky
1997-10-31 0:00 ` Robert Bernecky
1997-11-01 0:00 ` Randy MacDonald
1997-11-01 0:00 ` Robert Dewar
1997-11-03 0:00 ` Jon S Anthony
1997-10-29 0:00 ` Programming language vote - results FRS DES
1997-10-25 0:00 ` Alan E & Carmel J Brain
1997-10-26 0:00 ` functionality of Java (was Re: Programming language vote - results) Randy MacDonald
1997-10-23 0:00 ` Programming language vote - results Jack Rudd
1997-10-25 0:00 ` Alan E & Carmel J Brain
1997-10-25 0:00 ` Kaz
1997-10-26 0:00 ` FRS DES
1997-10-27 0:00 ` Robert Bernecky
1997-10-27 0:00 ` APL argument W. Wesley Groleau x4923
1997-10-28 0:00 ` Randy MacDonald
1997-10-28 0:00 ` Programming language vote - results Jan Karman
1997-10-28 0:00 ` Robert Bernecky
1997-10-28 0:00 ` James L. Ryan
1997-10-29 0:00 ` Robert Bernecky
[not found] ` <bosworth-2910972044300001@access59.accsyst.com>
1997-10-30 0:00 ` Robert Bernecky
1997-10-30 0:00 ` James L. Ryan
1997-10-31 0:00 ` Robert Bernecky
1997-10-31 0:00 ` James L. Ryan
1997-10-29 0:00 ` Jack Rudd
1997-10-25 0:00 ` Peter Seebach
1997-11-18 0:00 ` Ingemar Ragnemalm
1997-11-18 0:00 ` Lawrence Kirby
1997-11-24 0:00 ` Martin M Dowie
1997-11-25 0:00 ` Kaz Kylheku
1997-11-26 0:00 ` Peter Seebach
1997-12-02 0:00 ` ANDREAS LEITNER
1997-12-02 0:00 ` Lawrence Kirby
1997-12-03 0:00 ` Billy Chambless
1997-12-03 0:00 ` Robert Dewar
1997-12-02 0:00 ` Robert Dewar
1997-12-05 0:00 ` John Sullivan
1997-11-25 0:00 ` Mark Wilden
1997-11-25 0:00 ` Martin M Dowie
1997-11-26 0:00 ` Lawrence Kirby
1997-11-26 0:00 ` FRS DES
1997-11-18 0:00 ` Kevin Swan
1997-11-29 0:00 ` Ingemar Ragnemalm
1998-09-10 0:00 ` Steven Katz
1997-11-18 0:00 ` firewind
1997-11-18 0:00 ` Kevin Swan
1997-11-19 0:00 ` Alan E & Carmel J Brain
1997-11-18 0:00 ` Larry Elmore
1997-11-20 0:00 ` firewind
1997-11-19 0:00 ` Mike Smith
1997-11-19 0:00 ` Matt
1997-11-20 0:00 ` firewind
[not found] ` <3474C71B.536B12F6@cgocable.net>
1997-11-21 0:00 ` CVigue
1997-11-23 0:00 ` Lawrence Kirby
1997-11-24 0:00 ` FRS DES
1997-11-20 0:00 ` Andy Knight
1997-11-20 0:00 ` firewind
1997-11-20 0:00 ` Coding for Obscurity Alan E & Carmel J Brain
1997-11-20 0:00 ` Stephan Wilms
1997-11-21 0:00 ` Jos A. Horsmeier
1997-11-23 0:00 ` Al Christians
1997-11-23 0:00 ` Alex Krol
1997-11-24 0:00 ` Jim Johnson
1997-11-24 0:00 ` Mark Wilden
1997-11-26 0:00 ` Robert S. White
1997-11-26 0:00 ` Leon Jones
1997-11-26 0:00 ` Lawrence Kirby
1997-11-26 0:00 ` Ron Natalie
1997-11-27 0:00 ` Joerg Rodemann
1997-11-26 0:00 ` Miguel Carrasquer Vidal
1997-12-01 0:00 ` ISONE
1997-12-01 0:00 ` ISONE
1997-11-26 0:00 ` Mark Wilden
1997-11-27 0:00 ` Richard A. O'Keefe
1997-11-24 0:00 ` Richard A. O'Keefe
1997-11-24 0:00 ` Samuel T. Harris
1997-11-24 0:00 ` Jon S Anthony
1997-11-25 0:00 ` Samuel T. Harris
1997-11-24 0:00 ` Matt
1997-11-24 0:00 ` Ed Falis
1997-11-20 0:00 ` firewind
1997-11-20 0:00 ` Jos A. Horsmeier
1997-11-20 0:00 ` Programming language vote - results Terry Richards
1997-11-20 0:00 ` Andy Knight
1997-11-23 0:00 ` Alex Krol
1997-11-25 0:00 ` William Tanksley
1997-11-26 0:00 ` Ron Natalie
1997-11-27 0:00 ` William Tanksley
1997-11-27 0:00 ` Lawrence Kirby
[not found] ` <65keij$mkd$1@nerd.apk.net>
1997-11-27 0:00 ` Kaz Kylheku
1997-11-28 0:00 ` Shmuel (Seymour J.) Metz
1997-12-01 0:00 ` FRS DES [this message]
1997-11-19 0:00 ` Peter Seebach
1997-11-19 0:00 ` Alan E & Carmel J Brain
1997-10-16 0:00 ` Randy MacDonald
[not found] ` <01bcdad2$fa9fdf60$25a43a91@basil.omroep.nl>
1997-10-17 0:00 ` D'Arcy J.M. Cain
1997-10-17 0:00 ` Robert I. Eachus
1997-10-13 0:00 ` Matthew Heaney
1997-10-14 0:00 ` Gary L. Scott
1997-10-13 0:00 ` Robert S. White
1997-10-13 0:00 ` Gary L. Scott
1997-10-19 0:00 ` William Rapp
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