On 2005-dec-11, at 06:48, Jack Unrue wrote:
My goal is simply to declare structs whose C equivalent includes array members. I'm not sure how the array declaration would be done in CFFI so I'll use LispWorks FLI instead:
(fli:define-c-struct foo (data (:c-array :int 32)) (id :int))
This would translate to:
(cffi:defcstruct foo (data :int :count 32) (id :int))
The plan is that you would access an element of this array using (cffi:foreign-slot-value foo-obj 'foo 'data <index>). However, this is not implemented yet so, for the time being, you'll need to use something like:
(cffi:mem-aref (cffi:foreign-slot-value foo-obj 'foo 'data) :int <index>)
Or:
(cffi:with-foreign-slots ((data) foo-obj foo) (cffi:mem-aref data :int <index>))
This is not to say that an array type is not needed. I think we'll need one in order to access multi-dimensional arrays conveniently.