Re: objc-runtime - methodLists not in Class

[David Ayers]

Tobias wrote:

> > in 'obc-class' definition, there is a field, which is defined as
> >
> > struct objc_method_list** methodLists;
> >
> >
> > see [1] for reference
> >
> > do we have something similar, or do i have to create a function to do this?
> >    
That depends on who you mean by "we" :-)

The ObjC Runtime is part of the compiler libraries.  But, yes, the FSF 
GCC's ObjC Runtime has a corresponding stucture member:
struct objc_method_list*  methods;
found in:
objc/objc.h
see:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libobjc/objc/objc.h?rev=1.3&content-type=text/x-cvsweb-markup
it is a linked list rather than an array of pointers.

Unfortunately the NeXT/Apple and FSF ObjC Runtimes have multiple subtile 
differences.  gnustep/base/objc-gnu2next.h attempts to do some runtime 
mappings but does the wrong thing for some mappings, which just aren't 
as simple as redefine. (see: class_get_class_method/class_getClassMethod)

That's why gnustep has GSObjCRuntime.h/.m, which can abstract the 
runtime API much better.  I'm actually fiddeling with a local version 
trying to create an API for method manipulations.  At the same time I'm 
adapting some of the existing implementations to avoid ObjC code with in 
these functions, to make them usable at a time where the ObjC isn't 
ready to be used yet (i.e. during +load)
(Note: Please don't write anything that makes use of the 
GSObjCReplaceMethod function, I introduced a bit back.  It's a hack I'd 
like to revert, once I have more coherent solution.)

Maybe you could explain a bit more what it is you want to do and I could 
see if I could post an RFA for the bits I've got, if the help solve your 
problem, because I'm still to far from posting an RFA for all the tweaks 
I'm fiddeling with.

Cheers,
Dave