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Conference bulova::decw_jan-89_to_nov-90

Title:	DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:	See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:	STAR::VATNE

Created:	Mon Oct 30 1989
Last Modified:	Mon Dec 31 1990
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3726
Total number of notes:	19516

1476.0. "XtInitialize question" by ANNECY::SIRON () Fri Sep 22 1989 06:36

           Usually, when we want to give a data to an application,
           we put it in the command line :
              >
              > run application data
              >
           and we find it in the main's arguments :
              >
              > main(argc , argv)
              >   int argc;
              >   char *argv[];
              >

           I wonder if there will be a problem with the use of DECWindows,
           because 'argc' and 'argv' are used in the function 'XtInitialize'.

           If someone can explain me what is the aim of 'argc' and 'argv'
           in the 'XtInitialize' function, and how to give a specific data
           to the application ...

                               Beforehand, thanks.
                               Didier.

T.R	Title	User	Personal Name	Date	Lines
1476.1		SDSVAX::SWEENEY	I was focused when focus wasnt cool	`Fri Sep 22 1989 09:45`	12
	They are the one and the same. The defined interface for obtaining command line arguments is the application "main" is called with argc and argv. The defined interface for telling X run-time information passed from the command line which invoked the application is to pass the same argc and argv to "XtInitialize". By the way, XtInitialize is an R2 format convenience routine for the R3 calls listed on page 2-130 of VMS DECwindows Toolkit Routines Reference Manual (VMS 5.1) Not that I want to compel usage of the current routines, but you ought to know that "XtInitialize" is not a current routine.
1476.2	Along the same lines	EXLIB::DLUGOSZ	Open foot, Insert Mouth	`Fri Sep 22 1989 11:33`	8
	While your on the subject (sort of at least)...I noticed a chapter on the X Resource Manager in the V2 Programmers Update manual. Does this imply that command line argument passing will be supported at V2 on VMS (or is this wishful thinking)? I can't find any release notes (other than for VMS 5.3) or I would have checked there first. Ron
1476.3	Just 'C' ??	GSRC::WEST	Variables don't, Constants aren't	`Fri Sep 22 1989 20:01`	7
	Also, Is this just for use with the C language ? I toyed with it once with Ada with zero success. -=> Jim <=-
1476.4	C only (is there any other programming language? :-) )	PSW::WINALSKI	Careful with that VAX, Eugene	`Sat Sep 23 1989 14:06`	10
	RE: .3 The main program for a C application is always a routine (C$MAIN, I think) in the C RTL. The C RTL routine uses LIB$GET_FOREIGN to obtain the command line builds argv and argc from that information, then calls the user's routine main(). If you are using Ada or any language other than C for your main program, none of this takes place. --PSW
1476.5		QUARK::LIONEL	Free advice is worth every cent	`Mon Sep 25 1989 20:58`	12
	Re: .0 I can't see how you can do that because DCL won't let you specify parameters to the RUN command. Re: .1 So I've heard, Pat, but I've not seen any clear documentation as to what should be used instead. And all of the examples use XTInitialize. Steve
1476.6	DO-IT-YOURSELF args ...	GSRC::WEST	Variables don't, Constants aren't	`Tue Sep 26 1989 17:45`	11
	It should be possible to use LIB$GET_FOREIGN to get the command line and then parse it yourself to build the ARGC and ARGV variables. I haven't tried this approach yet, but I do not see any reason why it should not work. -=> Jim <=-