[OSC_dev] handling nil/inf in oscpack

[Graham Wakefield]

FWIW, I made a nasty kludge for the problem by adding this to class  
ReceivedMessageArgumentStream:

void hack_next()
{
	p_++;
}

And doing this in my handler:

		//process
		unsigned long argc = m.ArgumentCount();
		const char *addr   = m.AddressPattern() ? m.AddressPattern() : "";
		const char *tags   = m.TypeTags() && argc ? m.TypeTags() : "";
		osc::ReceivedMessageArgumentStream args = m.ArgumentStream();
		
		//...

		for(int i=0; i < argc; i++) {
			switch(tags[i])
			{
				case 'f': {
					float v; args >> v;
					lua_pushnumber(L, v);
				} break;
				
				//.. etc. for other types

				case 'T': {
					bool v; args >> v;
					lua_pushboolean(L, true);
				} break;
				case 'F': {
					bool v; args >> v;
					lua_pushboolean(L, false);
				} break;
				case 'N': {
					args.hack_next();  ///<----- yuck
					lua_pushnil(L);
				} break;
				
				//.. etc.

				default: {
					args.hack_next();  ///<----- yuck
					lua_pushnil(L);
				} break;
			}
		}
	
But really, I think there should be some method in  
ReceivedMessageArgumentStream along the lines of args.ignoreArgument().

Best,

Graham

On Mar 25, 2008, at 1:03 PM, grahamwakefield wrote:

>
> Hi,
>
> I'm writing a generic OSC-service for the Lua language, based on  
> oscpack.
> All is working wonderfully, except that I'm stuck on how to iterate  
> past
> Nil/Infinitum types in received message streams.
>
> I'm not sure how to increment the ReceivedMessageArgumentStream  
> pointer for
> N and I types. In the source, there's a comment:
>
>     // not sure if it would be useful to stream Nil and Infinitum
>     // for now it's not possible
>
> So my question: if there's a Nil or Infinitum embedded within a  
> message
> stream (e.g., type tags = "iNi"), how can I iterate past the Nil/ 
> Infinitum
> and get the next argument? For T and F, I can use the >> operator  
> to move to
> the next argument, but there isn't an equivalent for N or I. Is there
> another way to increment the stream?
>
> Thanks,
>
> Graham
>
> Example:
>
> send("test", 3, nil, 3)
> ->
> received address:"test:
> received types: "iNi"
> received arg 1: 3
> received arg 2: nil
> terminate called after throwing an instance of
> 'osc::WrongArgumentTypeException'
>
>
> -- 
> View this message in context: http://www.nabble.com/handling-nil- 
> inf-in-oscpack-tp16287337p16287337.html
> Sent from the OpenSound Control (OSC) - Dev mailing list archive at  
> Nabble.com.
>
> _______________________________________________
> OSC_dev mailing list
> OSC_dev at create.ucsb.edu
> http://lists.create.ucsb.edu/mailman/listinfo/osc_dev

Be seeing you

grrr waaa
www.grahamwakefield.net

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