From:	Alain Magloire <alainm AT rcsm DOT ece DOT mcgill DOT ca>
Message-Id:	<199906141805.OAA09094@mccoy2.ECE.McGill.CA>
Subject:	Re: {v,}snprintf.c ???
To:	djgpp-workers AT delorie DOT com
Date:	Mon, 14 Jun 1999 14:05:36 -0400 (EDT)
In-Reply-To:	<Pine.SUN.3.91.990613111143.17906I-100000@is> from "Eli Zaretskii" at Jun 13, 99 11:12:08 am
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Bonjour M. Eli Zaretskii
> 
> 
> On Wed, 9 Jun 1999, Alain Magloire wrote:
> 
> > int
> > snprintf(char *str, size_t n, const char *fmt, ...)
> > {
> >   FILE _strbuf;
> >   int len;
> > 
> >   if ((int)n < 1)
> >     return EOF;
> 
> The C9X draft is rather vague on this point, but it surely doesn't say
> that N should be strictly positive.  In fact, I can understand its
> language as meaning that calling {v,}snprintf with a zero N is a way
> to know how many characters should I allocate for the string that I
> pass to it when I *really* need some output.

> 
> What do other implementations do when N is zero?

An unfair question, lots of OS did not have the chance to
catch up with C9X. So they usually will implement the old BSD
behaviour
if (n < 1)
	return EOF;

Even Unix98 and XSH says if n == 0 the behaviour is unspecified.
For example Solaris-2.6 still will return -1(EOF).

But I think your desire to follow C9X std, is fair.

-- 
au revoir, alain
----
Aussi haut que l'on soit assis, on est toujours assis que sur son cul !!!

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