Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!hplabs!pyramid!pyrnj!romain
From: romain@pyrnj.uucp (Romain Kang)
Newsgroups: comp.sys.pyramid
Subject: Re: Wrapper function to sprintf
Message-ID: <777@pyrnj.uucp>
Date: 3 Mar 88 03:47:16 GMT
References: <15847@pyramid.pyramid.com>
Reply-To: romain@pyrnj.UUCP (Romain Kang)
Organization: Pyramid Technology Corp, Woodbridge, NJ
Lines: 31
Keywords: sprintf, wrapper, varargs

varargs is indeed the correct solution, though the man page says
nothing about nested variadic functions.  This is probably trivial for
comp.lang.c junkies, but it's still easy to use varargs non-portably.

The correct translation of your function is

#include <varargs.h>

dialog_box(cs, va_alist)
char	*cs;
va_dcl
{
	char	buffer[512];
	sprintf(buffer, cs, va_alist);
	.
}

However, it's easy to get wrong.  The following doesn't look
unreasonable -- it may even work on a VAX -- but probably fails on a
Sun-3, which isn't such a radical box.  It definitely doesn't work
on a Pyramid...

	va_list	ap;

	va_start(ap);
	sprintf(buffer, cs, ap);
	va_end(ap);
-- 
Romain Kang			{allegra,cmcl2,pyramid,rutgers}!pyrnj!romain
Pyramid Technology Corp. /  10 Woodbridge Center. Dr /  Woodbridge NJ  07095

"Eggheads unite! You have nothing to lose but your yolks!" -Adlai Stevenson