Re: [Pyobjc-dev] In and out of NSData

[Ronald O. <ous...@ci...>]

On Wednesday, Jan 8, 2003, at 15:56 Europe/Amsterdam, bb...@ma... 
wrote:

> On Wednesday, Jan 8, 2003, at 01:24 US/Eastern, Ronald Oussoren wrote:
>>> Is there currently any way to do (pyobjc) NS* <-> (Carbon.CF) CF* 
>>> for the toll-free bridged types?  I don't see anything obvious from 
>>> a quick look.
>
> It isn't necessary.  Toll-free means that they are effectively one in 
> the same.
>
> In ObjC, if you have....
>
> CFDataRef foo;  // basically, CFData *foo
>
>
> .... you can:
>
>     [foo bytes];
>
> That is, CFData * and NSData * are *exactly the same* as far as the 
> ObjC runtime and CF*() APIs are concerned.

But Python doesn't know that. We'll have to add functions that will 
basicly perform pointer casts. Remember that we use one set of types to 
wrap NS* objects (PyObjC) and another set to wrap CF* objects (part of 
the python core). The functions will have to extract a pointer from one 
kind of wrapper and stuff it into another one.

Ronald