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From: ries@trwrb.UUCP
Newsgroups: comp.lang.c
Subject: Linting Malloc (Was: Re: Need help with pointer to array[][])
Message-ID: <1661@trwrb.UUCP>
Date: Wed, 11-Mar-87 13:45:03 EST
Article-I.D.: trwrb.1661
Posted: Wed Mar 11 13:45:03 1987
Date-Received: Fri, 13-Mar-87 05:33:27 EST
References: <132@batcomputer.tn.cornell.edu> <1911@utah-gr.UUCP> <5347@mimsy.UUCP>
Reply-To: ries@trwrb.UUCP (Marc Ries)
Organization: TRW Operations and Support Group
Lines: 56
Keywords: "warning: possible pointer alignment problem"

In article <5347@mimsy.UUCP> chris@mimsy.UUCP (Chris Torek) writes:
[... discussions on dynamically allocating arrays deleted ...]
>> 
>>	fnames = (char (*)[16][32])malloc(16*32*sizeof(char));
>>
[.. more deletions ...]
>Of course, proper paranoia also includes checking the return
>value from malloc():
>
>	if ((fnames = (char (*)[32]) malloc(16 * sizeof (char [32))) == NULL)
>		...		/* handle out of memory error */
>
>Another annoying nit is that malloc() takes an unsigned argument,
>while sizeof has type `size_t', which is not necessarily unsigned
>(it is signed in 4BSD), requiring yet more casts.  (I would rather
>have an unsigned `size_t'.)
>-- 
>In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept

I have followed the discussion because of  the  comments  on  de-
linting  and  portability.  Maybe  one of the linting experts can
comment on the following case.

I noticed that while practicing de-linting the "filter"  code  in
the  latest  release of Dave Taylor's "ELM" mailer, the "parse.c"
code has several lines of the type:

	if ((cond = (struct condition_rec *)
              malloc(sizeof(struct condition_rec))) == NULL) {
  	  (void) fprintf(stderr,"couldn't malloc first condition rec!\n");
  	  return(-1);
  	}
where:
	char *malloc();
	struct condition_rec	*cond;

lint (Pyramid 98X, 3.1 DualOSx, BSD Universe):
	"warning: possible pointer alignment problem"

llib-lc:
	char *	malloc(n) unsigned n; {static char c; return(&c);}


Summary:  Several gyrations of trying to  get  lint  to  shut  up
        hasn't.  I  there  a  way  to get lint to pass this, make
        this "more" portable, or ?.

		Marc A. Ries

		sdcrdcf!---\ 
                ihnp4!------\----- trwrb! --- ries
-- 
		Marc A. Ries

		sdcrdcf!---\ 
                ihnp4!------\----- trwrb! --- ries