what about functions defined in a macro where i wont know the return
type in advance?
such as:
#define CV_NEXT_GRAPH_EDGE( edge, vertex ) \
(assert((edge)->vtx[0] == (vertex) || (edge)->vtx[1] == (vertex)), \
(edge)->next[(edge)->vtx[1] == (vertex)])
should I just implement this as a python function, or is there a way
to wrap it?
I would wrapping wouldn't be possible since the type isn't determined
till runtime...
On Wed, Jul 1, 2009 at 3:53 PM, Chris Colbert<[email protected]> wrote:
> Thanks Lisandro,
>
> I may just end up declaring each struct like this with a 'pass'
>
> and then implementing the fields on the python side (this is how ctypes does
> it)
>
> Cheers!
>
> On Wed, Jul 1, 2009 at 3:01 PM, Lisandro Dalcin<[email protected]> wrote:
>> On Wed, Jul 1, 2009 at 3:24 PM, Chris Colbert<[email protected]> wrote:
>>> i just saw this line in the docs:
>>>
>>> 6. If the header file defines a function using a macro, declare it as
>>> though it were an ordinary function, with appropriate argument and
>>> result types.
>>>
>>> So i'll start there.
>>>
>>> Sorry for the bogus post.
>>>
>>
>> IMHO, your post was not bogus... Making Cython use such kind of macros
>> (which resembles a C++ template emulation) can be not so easy...
>> Perhaps the easiest way would be to define a helper struct (one of
>> each node_type) in some C header, and then include it using cdef
>> extern from "mydefs.h": ...
>>
>>
>>>
>>> On Wed, Jul 1, 2009 at 1:52 PM, Chris Colbert<[email protected]> wrote:
>>>> In wrapping a C library, I come across many #define statements that I
>>>> need to use elsewhere. When they simply define a constant, I use an
>>>> anonymous enum and all is well.
>>>>
>>>> But how would I wrap something like this that shown up in a header
>>>> file that i'm cdef extern'ing from:
>>>>
>>>> #define CV_TREE_NODE_FIELDS(node_type) \
>>>>
>>>> int flags; \
>>>>
>>>> int header_size; \
>>>>
>>>> struct node_type* h_prev; \
>>>>
>>>> struct node_type* h_next; \
>>>>
>>>> struct node_type* v_prev; \
>>>>
>>>> struct node_type* v_next ;
>>>>
>>>>
>>>> or something like this:
>>>>
>>>> #define CV_IS_STORAGE(storage) \
>>>>
>>>> ((storage) != NULL && \
>>>>
>>>> (((CvMemStorage*)(storage))->signature & CV_MAGIC_MASK) ==
>>>> CV_STORAGE_MAGIC_VAL)
>>>>
>>>>
>>>>
>>>>
>>>> Thanks and Cheers!
>>>>
>>>> Chris
>>>>
>>> _______________________________________________
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>>>
>>
>>
>>
>> --
>> Lisandro Dalcín
>> ---------------
>> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
>> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
>> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
>> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
>> Tel/Fax: +54-(0)342-451.1594
>> _______________________________________________
>> Cython-dev mailing list
>> [email protected]
>> http://codespeak.net/mailman/listinfo/cython-dev
>>
>
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