Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uwm.edu!linac!att!ucbvax!dog.ee.lbl.gov!elf.ee.lbl.gov!torek
From: torek@elf.ee.lbl.gov (Chris Torek)
Newsgroups: comp.lang.c
Subject: Re: Initializing a pointer inside a struct
Message-ID: <12166@dog.ee.lbl.gov>
Date: 17 Apr 91 16:15:51 GMT
References: <1991Apr17.105139.16331@fy.chalmers.se>
Reply-To: torek@elf.ee.lbl.gov (Chris Torek)
Organization: Lawrence Berkeley Laboratory, Berkeley
Lines: 43
X-Local-Date: Wed, 17 Apr 91 09:15:51 PDT

In article <1991Apr17.105139.16331@fy.chalmers.se> f90angu@fy.chalmers.se
(Andreas Gunnarsson) writes:
>I've tried this:
>
>struct {
>   ...
>   int *int_list;
>   ...
>} list_of_structs[] =
>{
>   { ..., {1, 2, 3, -1}, ...},
>   { ..., {4, -1}, ...},
>   ...
>};
>
>It doesn't work. I know I could declare the lists of integers as separate
>variables and use the address, but it would be much harder to see what data
>belongs where, and I would have to use *lots* of variable names.

This is pretty much the only way to do it.

>I could also write 'int int_list[MAX];' instead of 'int *int_list;', but in
>that case lots of space would be wasted if there is big variance in length.

Right.

>Is there any simple way to do it?

Use a preprocessor (not `cpp'); have it emit something like

	int L0[] = { 1, 2, 3, -1 };
	int L1[] = { 4, -1 };
	...
	struct ... list_of_structs[] = {
		{ ..., L0, ... },
		{ ..., L1, ... },
		...
	};

where each Li is the array to which list_of_structs[i] should point.
-- 
In-Real-Life: Chris Torek, Lawrence Berkeley Lab CSE/EE (+1 415 486 5427)
Berkeley, CA		Domain:	torek@ee.lbl.gov