Path: utzoo!attcan!uunet!mcvax!kth!draken!tut!router!vtt!savela
From: savela@tel2.tel.vtt.fi (Markku Savela)
Newsgroups: comp.lang.c
Subject: Re: Indefinite-length array as member of struct:  how?
Summary: Not the answer, but offsetof helps some...
Keywords: offsetof
Message-ID: <2607@tel2.tel.vtt.fi>
Date: 8 Jul 89 21:29:08 GMT
References: <7360@c3pe.UUCP> <8870@venera.isi.edu>
Reply-To: savela%vtttel@router.funet.fi
Organization: Technical Research Centre of Finland
Lines: 19

In article <8870@venera.isi.edu>, lmiller@venera.isi.edu (Larry Miller) writes:
> In article <7360@c3pe.UUCP> charles@c3pe.UUCP (Charles Green) writes:
>>struct node {
>>	struct node* next;
>>	char	string[];
>>} *nodeptr;
>
> 		nodeptr = malloc(strlen(data)+1 + sizeof(struct node *));

   This the prime example where the ANSI "offsetof"-macro becomes handy.
I write the above

	(struct node *)malloc(offsetof(struct node,string)+strlen(data)+1);

   About the original question, I guess we have to resign to using
either "string[1]" or "string[HUGE_NUMER]" to satisfy picky compilers.
(Isn't this one of the recurring questions of comp.lang.c?)
--
  Markku Savela