Phantasmal Site > DGD > Writing a Library > Designing Driver Objs

Designing Your Driver Object

From: dgd at list.imaginary.com (Erwin Harte)
Date: Mon May 19 22:42:01 2003
Subject: [DGD] Function Hooks

On Mon, May 19, 2003 at 11:36:05PM -0400, Ben Chambers wrote:
> Does the DGD REQUIRE all those functions to be implemented prior to running
> the mudlib, or can I just start with something that does literally nothing
> and work from there?

Are you talking about the functions that DGD expects in the driver
object, or about the hooks that the kernel-lib provides?

The driver object is expected to provide certain functions, even if
those functions do (almost) nothing and are just placeholders.

The kernel-lib can be started without any modifications and you can
take it from there.

Erwin.
-- 
Erwin Harte

From: dgd at list.imaginary.com (Felix A. Croes)
Date: Thu May 22 07:24:01 2003
Subject: [DGD] Auto and Driver objects

"Ben Chambers" wrote:

> Thanks!  That clarifies a good many things... I was sitting there staring at
> the driver and auto objects, and saying, how can the driver object, use the
> auto object to load the auto object that hasn't been loaded yet...

But note that in some mudlibs, it may be useful for the driver object
to inherit the auto object after all.  So the driver object can do that;
it just doesn't do it automatically.

Regards,
Dworkin

From: dgd at list.imaginary.com (Erwin Harte)
Date: Wed Jan 30 11:52:00 2002
Subject: [DGD] driver / config file

On Wed, Jan 30, 2002 at 06:07:58PM +0100, Johann N. Schmidt wrote:
> Hello,
> 
> some suggestions regarding driver.c/config file:
>  
> would it be impossible/have disadvantages to transport the tags
>  
> 1. include_file
> 2. include_dirs
> 3. auto_object
> 4. create
>  
> from the dgd config file to the driver, thus having functions
>  
[...]

The driver-object itself also needs to be compiled and for that DGD
needs to know what the standard include file, the include-directories
and the create function are (quite often you don't use it, but it _is_
possible to do something useful in there).

If you have a look at the driver-functions that DGD already supports
you'll see that you can do just about all of the above in LPC already
by adding some extra code in the driver object and the alternate
create function could be done by some special code in the auto object.

Hope that helps,

Erwin.
-- 
Erwin Harte