On Thu, Aug 19, 2004 at 01:42:14PM +1000, Sisyphus wrote:
> void wrap_printf(AV * arguments) {
> /* Code to transfer the referred arguments to C's printf() function */
> }
>
> I don't know, off the top of my head, exactly what *that* "Code" looks
> like either - though I'm confident I can work it out.
>
> A slight problem with this last rendition is that one will now have to
> call wrap_printf() from perl as:
>
> wrap_printf(["%d\n%#o\n", $x, $y]);
>
> which is different to the usual printf() argument format - which would
> be unfortunate, though tolerable.
I think that it's possible to partly work round this by prototyping your
function (at the perl level), but in turn I don't think that Inline can do
this; you'd need XS.
But even that doesn't really solve the problem at perl level, as
@a = (%d\n%#o\n", $x, $y);
wrap_printf(@a);
would work correctly with @a actually passed in as [EMAIL PROTECTED], but
wrap_printf("%d\n%#o\n", $x, $y);
wouldn't. (I think. Sorry, this is untested)
And as the rest of the thread discusses, even this doesn't solve the problem
of generating a va_arg list. Which I think can't be done portably (ie without
cheating).
Nicholas Clark
