OpenEuphoria

Re: Eval Script

• Posted by cklester <cklester at yahoo.com> Dec 15, 2005
• 560 views

The thing is with scripting or plug-ins, I expect those things to modify data
in the current program. For instance, if I've got a music player and I provide
an interface for filtering, I expect that plug-in to be able to modify the
stream of bits representing the music. The same for a graphics program. If I
have an image and I want to run it through a plug-in filter, how would that
program interact with the plug-in so that the internal data- the graphic- is
modified by the plug-in?

I can think of at least two ways:

+ Plug-ins are actual Euphoria program files. In this case, the program
  creates a file called "mod_this.dat". Then it opens and loads the plug-in
  file, which is actually just a Euphoria program. The program runs this
  code using scripting (like Alex C's Multiplatform Eval Script). The
  program reads the plug-in's output and continues with the new data... 
  The plug-in can provide a progress bar and cancel button if desired.
  This way would not crash the original program.

+ Plug-ins are Euphoria include files, which can be dynamically included
  with Vincent's dynamic include library. They have to call a registration
  routine. This could cause the program to crash if the plug-in wasn't
  robust.

+ Other ways...?

-=ck
"Programming in a state of Euphoria."
http://www.cklester.com/euphoria/