[Xcb] Iter

Jamey Sharp jamey at minilop.net
Sat Dec 17 15:51:07 PST 2005

On Sat, Dec 17, 2005 at 02:28:10PM -0500, Jeremy Kolb wrote:
> As much as I enjoy iters a lot of xlib code was written using pointers
> and then you could simply use array syntax. I've noticed that sometimes
> XCB will generate a function that allows me to do this: it simply
> returns a pointer to an array of some structure.  Then when I modify
> that structure it decides to only make an Iter function.
> For instance:
> ...
> And now I'm missing that first function and only get an Iter function.
> This seems pretty inconsistent to me, and I would really like the
> XCBXvQueryEncodingsInfo function both times.
> Is this a bug or is it because of the list inside the structure?

It's because of the list inside the structure: at that point the
structure is variable-length, and C-style arrays can't work.

Xlib gets around this by allocating a bunch of new arrays and copying
the entire contents of the reply into the arrays. We didn't want to go

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