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From: fraser@bilby.cs.uwa.oz.au (Fraser Wilson)
Newsgroups: comp.lang.c
Subject: Re: Finding Available Length Of Strings...
Message-ID: <fraser.658230338@bilby>
Date: 10 Nov 90 09:45:38 GMT
References: <16752@hydra.gatech.EDU>
Organization: Dept. Computer Science, University of Western Australia.
Lines: 34

In <16752@hydra.gatech.EDU> gt4512c@prism.gatech.EDU (BRADBERRY,JOHN L) writes:

>When passing strings to other functions, what is the BEST way to find
>the bytes remaining in the formal string parameter (to prevent over-
>writting the end while in the function)?? Does it involve using the
>current starting address of the string parameter and calculating
>(somehow) the DEFINED end??

The language supports no feature like this.  All the function knows is
that it has a pointer to char.  If you want to know how much space is
available, you have to do it yourself.

eg
	#define LAST_CHARACTER	'\1';
	char s[32];

	space(char *s)
	{
	int i;
		for(i=0;s[i]!=LAST_CHARACTER;i++);
		return i;
	}

	main()
	{
		s[31]=LAST_CHARACTER;
		printf("%i\n",space(s));
	}

>Thanks for any help here...

You're welcome.  Hope it does.

Fraser.