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Subject: Re: Question about va_* macros
From: Juan Manuel Guerrero <juan DOT guerrero AT gmx DOT de>
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Reply-To: djgpp AT delorie DOT com

On 22 Dez., 02:54, Hans-Bernhard Bröker <HBBroe DOT  DOT  DOT  AT t-online DOT de> wrote:
> On 22.12.2012 01:52, Juan Manuel Guerrero wrote:
>
> > The reason why I have asked this is because according to C99 or POSIX
> > printf and scanf family of functions shall return EINVAL if there are
> > insufficient arguments.
>
> At least for C99 itself, I'm pretty sure there cannot be any such
> requirment.  The term EINVAL is not mentioned at all in C99, nor C11 for
> that matter.  What both C99 and C11 actually say, for both fscanf and
> fprint, is:
>
>  > If there are insufficient arguments for the format, the behavior is
>  > undefined.

True.  It is only an X/Open System Interface (XSI) extension.