Path: utzoo!mnetor!uunet!husc6!bloom-beacon!gatech!purdue!decwrl!hplabs!sdcrdcf!trwrb!aero!venera.isi.edu!lmiller
From: lmiller@venera.isi.edu (Larry Miller)
Newsgroups: comp.lang.c
Subject: Re: Help me cast this!
Message-ID: <5426@venera.isi.edu>
Date: 4 May 88 16:32:00 GMT
References: <294@fedeva.UUCP>
Reply-To: lmiller@venera.isi.edu.UUCP (Larry Miller)
Organization: Information Sciences Institute, Univ. of So. California
Lines: 33
Keywords: pointer to array of struct

In article <294@fedeva.UUCP> wrd3156@fedeva.UUCP (Bill Daniels) writes:
>
>How do I cast the malloc() in line 12 of the following program to avoid 
>the lint cries of "warning: illegal pointer combination" et al?
>
>main()	
>{
>	char *malloc();
>	int i;
>	struct outfile {
>		int j;
>		int k;
>	} (*output)[];
>
>	output = malloc(sizeof(struct outfile) * 3);


Probably seen 100s of these by now, but here goes:


% cdecl
cast malloc into  pointer to array of struct outfile
Warning: Unsupported in C -- Pointer to array of unspecified dimension
(struct outfile (*)[])malloc(sizeof(struct outfile) * 3);

NOTE the warning!!
And note that the cast is almost the same as the definition of output, only
the name is removed.

Larry Miller				lmiller@venera.isi.edu (no uucp)
USC/ISI					213-822-1511
4676 Admiralty Way
Marina del Rey, CA. 90292