C Macro question

[gaf at blu.org (Jerry Feldman)]

In short, macros do not support variable arguments, but....
You are better off using a C function for that (assume you include 
stdarg.h).
int printerr(const star *fmt, ...)
{
	va_list ap;
	int rv;
	time_t now = time(NULL);
	char msg[SOMESIZE];
	va_start(ap, fmt);
	sprintf(msg, "%s - ERROR: %s", ctime(&now), fmt);
	rv = vfprintf(logfile, msg, ap);
	return rv;
}

Instead of ctime, I would probably use strftime and format the date 
differently, but ctime works fine).
Frank Ramsay wrote:
> I'm horrible with Macros in C does anyone know how to make a macro that w
> 
> Now I have a ton of these so altering them manually would take much longer 
> than I have.  Does anyone know of a macro or function that takes var args for
>  
> printf and re-formats them to a more logfile friendly format?
> 
> ie 
> printerror("file %d not found.\n",filename);
> 
> but what I want is something like this is this
> 
> Sat Jun 15 11:44:02 - ERROR: file greeting.vox not found.
> 
> 
> 					-fjr
> 
> 
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-- 
Jerry Feldman <gaf at blu.org>
Boston Linux and Unix user group
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