From: Shadowfirebird <shadowfirebird@...>
Date: 2008-08-01T05:48:24+09:00
Subject: Re: File manipulation

Hi Robert,

It seems to me that that's a hell of a difficult thing to do.

Take your Sword.new() call.   There are a lot of different ways I
might code that (especially in Ruby!).  A simple search and replace
will probably not be very reliable.

s = Sword.new()
OR
swords = []; swords << sword.new()
OR
Event.new(Sword.new.strike(:martin))

...or whatever.  And that's just one statement -- it says nothing of
the multitude of different ways that a given problem can be solved
using Ruby code.

Is there any particular reason why you need to translate Ruby to LPC?
Why not just use Ruby as the in-game language?


(Confession time: I'm writing a MUSH myself, although mine is really
just a learning exercise, and, I suspect, a great deal less ambitious
than your project.  For various reasons I'd dismissed the idea of
users writing code within the game, one of them being that I couldn't
see of any easy way to protect the game from malicious code.  I'd be
interested on your thoughts on this, either inside or outside the
list.)

Shadowfirebird.


On Thu, Jul 31, 2008 at 7:49 PM, Robert Klemme
<shortcutter@googlemail.com> wrote:
> On 31.07.2008 20:22, Tim Mcd wrote:
>>
>> So, I am currently working on a MUD (Online multiplayer text based game,
>> like an MMO). The MUD's scripting language is LPC. I am trying to create
>> a ruby script, that reads another ruby file, and changes all instances
>> of 'Sword-of-might = Sword.new(...)' to something like 'static void
>> create() {...}'. Nothing too fancy, just me being able to go through a
>> file finding different bits of ruby that I can then replace with the
>> equivalent LPC code.
>>
>> An example of how it might work is: Ruby has a table of ruby phrases and
>> what to turn them into if encountered. Ruby then reads the given file,
>> and if it finds any of the given phrases, turns them into the
>> corresponding LPC that I have defined.
>>
>>  So, the problem is, I have no idea how to go about doing something
>> like this in Ruby. Any thoughts/help or places to look? (tutorials,
>> etc.)
>
> Depends how many phrases you got there.  If there are just a few of them and
> they are fixed, you can do something like this:
>
> phrases = {
>  "foo" => "bar",
>  "baz" => "boo!",
> }
>
> dat = File.read input_file
>
> dat.gsub! Regexp.union(phrases.keys) do |m|
>  phrases[m] or raise "Phrase not found: #{m.inspect}"
> end
>
> File.open out, "w" do |io|
>  io.write dat
> end
>
> Kind regards
>
>        robert
>
>



-- 
Me, I imagine places that I have never seen / The colored lights in
fountains, blue and green / And I imagine places that I will never go
/ Behind these clouds that hang here dark and low
But it's there when I'm holding you / There when I'm sleeping too /
There when there's nothing left of me / Hanging out behind the
burned-out factories / Out of reach but leading me / Into the
beautiful sea