OK, I looked at the varin, varout descriptions in the online manual,
and they specifically mention global variables, but WOW is that
documentation minimal. I would suggest asking Swig-
[EMAIL PROTECTED] for some assistance.
On Feb 16, 2007, at 1:10 PM, Bill Spotz wrote:
> Andrea,
>
> It is my understanding that swig typemaps only apply to function
> arguments. Since what you are talking about is a global variable,
> I don't believe typemaps will help you. I would try
>
> %{
> #include "header-that-contains-vec.h"
> npy_intp vec_dims[ ] = { (npy_intp) length_of_vec };
> %}
> %rename(vec) numpy_vec;
> %ignore vec;
> %include "header-that-contains-vec.h"
> %inline %{
> PyObject * numpy_vec = PyArray_SimpleNewFromData(1, vec_dims,
> NPY_DOUBLE, (void*)vec);
> %}
>
> I guess it would be nice if you could force a "Py_DECREF
> (numpy_vec);" before the module is destroyed, but I'll leave that
> as an exercise...
>
> On Feb 16, 2007, at 10:59 AM, Andrea Tomadin wrote:
>
>> Il giorno 15/feb/07, alle ore 22:26, Bill Spotz ha scritto:
>>
>>> It seems to me you would need to %ignore vec, so that it is not
>>> wrapped as a raw pointer to a double, and then in your interface
>>> file create a PyArrayObject whose data buffer points to vec (the
>>> most efficient way to do this is with %inline). Then use %rename
>>> to rename whatever you called your PyArrayObject to "vec" (or not,
>>> if you do not care about the name). Finally,
>>>
>>> foo.cvar.vec = numpy.zeros(10)
>>>
>>> is going to decrement (and probably delete) your original vec and
>>> replace it with the new array of zeros (I think,
>>
>> Thank you Bill for your help, even if writing this code is not
>> straightforward for me. Anyway, while I was reading the docs, I
>> became aware of the varin, varout typemap options. I wonder if I can
>> define a
>> typemap(varin) double *
>> declaration, and insert in it the same code that in "numpy.i"
>> translates the PyArrayObject into a C array and vice versa.
>> But I cannot find an example of typemp(varin) for Python, so I don't
>> know what to use for the output, instead of $1. Where are the
>> typemaps
>> (varin) for Python?
>> It seems strange that nobody wrote a public code for such a simple
>> task, as I read that Swig supports Python since the 90s! I suspect I
>> have just not looked in the right places?!
>>
>> Thank you again for help!
>> Andrea
>
> ** Bill Spotz **
> ** Sandia National Laboratories Voice: (505)845-0170 **
> ** P.O. Box 5800 Fax: (505)284-5451 **
> ** Albuquerque, NM 87185-0370 Email: [EMAIL PROTECTED] **
>
>
** Bill Spotz **
** Sandia National Laboratories Voice: (505)845-0170 **
** P.O. Box 5800 Fax: (505)284-5451 **
** Albuquerque, NM 87185-0370 Email: [EMAIL PROTECTED] **
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