[Freeciv-Dev] Re: Perl scripting implemented

[Peter Barker <pbarker@xxxxxxxxxxxxxxxxxxxxx>]

On Wed, 25 Apr 2001, Raimar Falke wrote:

> What is XS?

In Laryy Wall's words:

An extraordinarily exported, expeditiously excellent, expressly eXternal
Subroutine, executed in existing C or C++, or in an exciting new extension
language called (exasperatingly) XS. Examine Chapter 6 [of "Programming
Perl"], Social Engineering, for the exact explanation. Exeunt.

> What kind of interface is between the civclient and the perl script? 
> In what way and form the information and commands (to send certain
> packets) are exchanged?

It is not a matter of the perl script sending packets. If I wanted to
do that, I would have written a client from scratch. I wanted to provide
scripting to all the existing client implementations. I am rethinking this
strategy.

The perl script can call exported functions from Freeciv.pm. These will
usually be wrappers around the C equivalent.

If you have a look at the diff, the one useful
change-the-state-of-the-game method I implemented,
"auto_arrange_workers" was explicitly coded by sending a
PACKET_CITY_MAKE_WORKER packet on (CITY_MAP_SIZE/2,CITY_MAP_SIZE/2). I
would imagine most methods will be coded in a similar way.

> ISA? Sorry I'm only done some small scripts in perl and no OO.

Inheritance in perl.

> > If anyone would like to see some _very_ ugly diffs, I'm quite happy to
> > supply them.

> Since I won't get more stupid by looking at them: can you send them to me?

Sure. I'll send them separately.

>       Raimar

Yours,
-- 
Peter Barker                          |   N    _--_|\ /---- Barham, Vic 
Programmer,Sysadmin,Geek              | W + E /     /\                
pbarker@xxxxxxxxxxxxxxxxxxxxx         |   S   \_,--?_*<-- Canberra      
You need a bigger hammer.             |             v    [35S, 149E]   
"Besides, what most US companies would call R&D, we call 'getting shit done'.
 We're an emminently practical people in many ways."
- jeremyl@xxxxxxxxxxx on SlashDot.