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.
--
Luís Oliveira
http://student.dei.uc.pt/~lmoliv/
Equipa Portuguesa do Translation Project
http://www.iro.umontreal.ca/translation/registry.cgi?team=pt
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