Re: A newbie question

Ok excellent, when everything is set up I'll provide an example of
connecting breve to Smalltalk and perhaps make a tutorial to document the
process.

Thanks.

GV

----- Original Message ----- 
From: "jon klein" <[email protected]>
To: <[email protected]>
Sent: Friday, June 04, 2004 12:20 PM
Subject: Re: [breve] A newbie question


>
> On Jun 1, 2004, at 12:22 AM, German Viscuso wrote:
>
> > If somehow breve could offer a dll with exported c functions that
> > communicate with the breve engine almost any Smalltalk user (and those
> > with
> > external api access via dlls in other languages) could use and map the
> > objects in the simulation thrugh it and build whatever intermediate
> > layer
> > neccessary.
> >
> > I'm willing to help in achieving this scheme if you think it's
> > possible (I
> > know little about breve right know) and if you give me some pointers
> > =) I
> > have an intermediate level of c and c++ knowledge (I'm mostly an
> > Smalltalk
> > programmer) but have done many projects that interfaced c dynamic link
> > libraries with Smalltalk (including having to build the dlls myself,
> > using
> > VC++).
>
> I'm in the process of cleanly separating out the the engine code from
> the
> steve language code.  It's involving a rather major (but well needed)
> restructuring of some of the code.  When it's finished, there will be a
> library and an API that you should be able to use from any language that
> can call C functions.
>
> Even though I haven't put together the API yet, I can give an overview
> of
> what will be needed:
>
> - translation between your language's types and the breve stEval
> structure
>
>    In steve/stEval.h (and as described in the plugin documentation),
> you'll
>    find the stEval structure.  This is the structure used to pass around
>    arguments and return values by the breve engine.  You'll need to
> provide
>    functions to translate to and from the stEval structure from your
> native
>    types.
>
> - use the API to call breve's "C-style internal functions", using
> stEvals
>    to pass around the data.
>
>    If you look at the source, in the steve directory, you'll find a bunch
>    of files that begin with the string "steveFuncs".  These are the files
>    which define the internal functions.
>
>    The call to do this might look something like this:
>
>      breveCallInternalFunction(currentInstance, functionName, arguments,
> &return);
>
> - port the steve class files to the native language, using these
> internal
>    functions.
>
>    This should be very straightforward once the rest is in place.
>
>
> For the moment, it might be best to start with the first item,
> translation
> between native types and the stEval structure.  Hopefully I'll have the
> code
> put back together in the next week or so, so that I'll be able to be
> more
> specific about how the pieces will come together.
>
> - jon klein
>
> _______________________________________________
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