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<H1>Re: Just a bit of musing</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A></LI>
<LI><em>Subject</em>: Re: Just a bit of musing</LI>
<LI><em>From</em>: <A HREF="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</A> (Chris Gray)</LI>
<LI><em>Date</em>: Tue, 4 Mar 97 07:23:17 MST</LI>
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<PRE>
:I posit that, in general, command interpreters for muds are Bad Things. The
:proposal runs sorta like this:
: The command interface to a mud can be viewed as a context free grammar. A
:such, one should be able to whip up a command interpreter with lex/yacc.
:I've started on it at least a dozen times but never managed to quite
:finish. Is this worthwhile? Thoughts?
I think you'll get a more rigid parser than you want for a MUD. You'll
also get one that you can't add verbs to while the MUD is running. If you
do it the classical lex/yacc way, you won't even be able to add words to
the language!
:The proxy and daemon communicate through shared memory or semaphores or
:some such. Advantages:
:the proxy <-> daemon link conform to a single interface scheme
:the proxy <-> user link can conform to several protocols... say one for
: text-based users, another for binary messages etc.
:if the user has link troubles, or is idle or whatever, it's the proxy that
:hangs.
:the proxy-daemon comm method is thru semaphores/shared memory. daemon
:writes updates to a shared segment that is read-only to all proxies. daemon
:reads new info from one segment per proxy. If the proxy has trouble and the
:segment isn't updated, the daemon skips it. Look ma... user A's troubles
:don't cascade and screw user B. Thoughts?
That's what I've got. I use AmigaOS Exec messages between the proxies and
the central server. In the Amiga's single address space, that's lots fast.
I currently have three different proxy programs: MUDAgent (talks serial
port reliable protocol), MUDBinary (supports my custom client over a
TCP link), and MUDText (supports a dumb telnet text-only connection).
The reason I did this is a bit different, however. My in-MUD interpreted
language has a recursive descent parser in a shared library. It needs to
maintain its own state in a parse (input can be huge!). So, I needed a
separate process for each client running something other than my custom
MUD client (which does the parsing local).
--
Chris Gray cg#ami-cg,GraySage.Edmonton.AB.CA
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: Just a bit of musing</STRONG>, <EM>(continued)</EM>
<ul compact>
<LI><strong><A NAME="00039" HREF="msg00039.html">Re: Just a bit of musing</A></strong>,
coder <a href="mailto:coder#ibm,net">coder#ibm,net</a>, Mon 03 Mar 1997, 03:13 GMT
</LI>
<LI><strong><A NAME="00042" HREF="msg00042.html">Re: Just a bit of musing</A></strong>,
Dmitri Kondratiev <a href="mailto:dima#paragraph,com">dima#paragraph,com</a>, Mon 03 Mar 1997, 09:36 GMT
</LI>
<LI><strong><A NAME="00045" HREF="msg00045.html">Re: Just a bit of musing</A></strong>,
Carter T Shock <a href="mailto:ctso#umiacs,umd.edu">ctso#umiacs,umd.edu</a>, Mon 03 Mar 1997, 21:22 GMT
</LI>
<LI><strong><A NAME="00046" HREF="msg00046.html">Re: Just a bit of musing</A></strong>,
Wout Mertens <a href="mailto:Wout.Mertens#rug,ac.be">Wout.Mertens#rug,ac.be</a>, Mon 03 Mar 1997, 22:51 GMT
</LI>
<LI><strong><A NAME="00049" HREF="msg00049.html">Re: Just a bit of musing</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Tue 04 Mar 1997, 23:49 GMT
</LI>
<LI><strong><A NAME="00050" HREF="msg00050.html">Re: Just a bit of musing</A></strong>,
coder <a href="mailto:coder#ibm,net">coder#ibm,net</a>, Wed 05 Mar 1997, 08:53 GMT
</LI>
<LI><strong><A NAME="00051" HREF="msg00051.html">Re: Just a bit of musing</A></strong>,
Nathan Yospe <a href="mailto:yospe#hawaii,edu">yospe#hawaii,edu</a>, Wed 05 Mar 1997, 14:31 GMT
</LI>
<LI><strong><A NAME="00052" HREF="msg00052.html">Re: Just a bit of musing</A></strong>,
coder <a href="mailto:coder#ibm,net">coder#ibm,net</a>, Wed 05 Mar 1997, 14:33 GMT
</LI>
<LI><strong><A NAME="00054" HREF="msg00054.html">Re: Just a bit of musing</A></strong>,
coder <a href="mailto:coder#ibm,net">coder#ibm,net</a>, Wed 05 Mar 1997, 16:15 GMT
</LI>
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