Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!rutgers!ames!ucbcad!zen!cory.Berkeley.EDU!iverson
From: iverson@cory.Berkeley.EDU (Tim Iverson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: ** Re: MSC 4.0 Large Model ** Original Posters problem solved!!!
Message-ID: <3370@zen.berkeley.edu>
Date: Sat, 22-Aug-87 01:25:26 EDT
Article-I.D.: zen.3370
Posted: Sat Aug 22 01:25:26 1987
Date-Received: Sun, 23-Aug-87 08:26:58 EDT
References: <10400006@altger.UUCP> <72@cunixc.columbia.edu> <1014@bsu-cs.UUCP> <3352@zen.berkeley.edu> <4291@teddy.UUCP>
Sender: news@zen.berkeley.edu
Reply-To: iverson@cory.Berkeley.EDU.UUCP (Tim Iverson)
Organization: University of California, Berkeley
Lines: 38

In article <4291@teddy.UUCP> jpn@teddy.UUCP (John P. Nelson) writes:
>>A cast is necesary for a comparison with large model pointers in
>>both lattice C and MSC4.0 ...
>
>I can't believe how much BAD information gets posted here.  If you don't
>know the answer, then DON'T POST!!!!!

Well, this time I guess my fingers did my thinking for me ...
I recalled previous postings about this and the fact that in large
model NULL is 0L on MSC and Lattice and then added two and two
and came up with three - basically that why would they define it
to 0L unless they needed to?  I cut myself while wielding Occam's
razor.

When I first saw this mild flame I thought, ah ha!, now I've got 'im.
So I wrote a little program to test it out.  Well, I'm wrong, John's
right, MSC and Lattice both work fine comparing far (32bit) pointers to
a short (16bit) 0.  Although, in my defense, I must state that this is
the first time I've posted such a stupid answer.

>To summarize:  when passing a null pointer to a function, you should
>always cast the 0 or NULL to the proper pointer type.  In any other
>context, you may use 0 or NULL interchangably.

Yes.  This is just good programming practice.  There are so many habits
I've had to force myself into (to maintain portability between unix and msdos)
once I started programming in MS-DOS, that I thought casting 0 was required.
Sorry for the misinformation.


- Tim Iverson
  iverson@cory.Berkeley.EDU
  ucbvax!cory.Berkeley.EDU


p.s.  For those of you who write insulting letters,
      save it for when we stand face to face ...
      (say, at dawn w/ bare hands - weapons are for wimps >:-)