[Nhproxy-discuss] Re: slashem proxy interface

[J. Ali Harlow]

On 2007-01-29 02:53:43 PM, m m wrote:
> Hi Ali,
>
>   I've been making some progress. I got nhproxy 0.9.0, but had errors  
> compiling it.
>             nhext.c:459: error: incompatible types in assignment
>             nhext.c:528: error: incompatible types in assignment
>
> These lines refer to
>             ap = *app;
> and
>            *app = ap;
> in the 'nhproxy_rpc_error_handler' function (va_list *app; va_list  
> ap;).
>
> I changed these lines to use va_copy, which seems to have done the  
> trick and it compiled fine after that.

Looks like bug #11406, fixed in HEAD.

> Next I went through the test examples, and pieced together a test  
> program, which I have attached, alongside the make file. Output is  
> here
>
> ./launch-proxy-slashem.
> Slashem LaunchedNhProxy RPC error: > NhExt standard "1.0" game  
> "SlashEM" version "0.0.8E0F2" protocols "1,2"
> NetHack Proxy: Failed to read reply to NhExt greeting
> NetHack Proxy: Failed to initialize
> Program initialization has failed.
> Report error to "wizard".
> Proxy: Failed to initialize window interface
>
>
> As you can see from the comments in my code, there are some blanks.  
> Any sugestions for the next step? The purpose is still just to  
> successfully load, pass a few messages and exit gracefully.

This looks far too low-level to me for what I think you want.

You might need it if you wanted to convert NhExt to XML without using  
NhProxy to decode it. Frankly, however, I'm not convinced this is  
practical. NhExt relies on in-depth meta-knowledge to keep the  
bandwidth down. This seems completely incompatible with XML's  
self-describing nature.

Instead, I would recommend writing your own marshaling functions,  
registered as NhProxy external procedures which produce XML with no  
regard to the fact that the procedure has already been marshaled in  
NhExt.

I've started writing an example of a minimal NhProxy client program  
which you might find helpful:

http://project.juiblex.co.uk/hg/minhack

Cheers,

Ali.