Xref: utzoo comp.lang.c:21521 comp.windows.x:13139
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!gatech!ken
From: ken@gatech.edu (Ken Seefried III)
Newsgroups: comp.lang.c,comp.windows.x
Subject: varargs and X
Keywords: varargs, Motif, X Windows, error handling, dialogs
Message-ID: <19199@gatech.edu>
Date: 6 Sep 89 21:06:13 GMT
Organization: Dr. Tongue's House of Code...
Lines: 51

---

I'm trying to build a general purpose error notification routine
for an X11/Motif application that I am writing.  I need to use
varargs to get the error messages to the routine (printf() style).

There is, however a catch.  I also need to pass the parent widget
ID to this routine.  None of the several FM's that I have give any 
clue as to how I might do this.

More or less, this is what I want to do (sans declarations, etc.):

/*--------------------------------------------------------------------------*/

Widget Error( parent, va_list )

	Widget parent;
        va_dcl

{

va_list         vaargs;
char            *fmt;
unsigned int    foo = 0; 
Arg             xmargs[ 24 ];     
XmString        msgStr_xm;
Widget          error_dialog;
char            buffer[ 1024 ];

        va_start( vaargs );
        fmt = va_arg( args, char * );
        vsscanf( buffer, fmt, vaargs );

        msgStr_xm = XmStringCreate( buffer, CS );

        XtSetArgs( xmargs[ foo ], XmNmessageString, MsgStr_xm ); foo++;

        error_dialog = XmCreateErrorDialog( parent, "Error", xmargs, foo );

	.
	.
	.

/*-------------------------------------------------------------------------*/

Anyone have any insight into the deep dark mysteries of varargs?
Any help would be greatly appreciated...


	...ken seefried iii		...!<anywhere>!gatech!ken
	   ken@gatech.edu