Swig and pointers

[Miki Tebeka]

Hello Java,

> ...
> extern int doIt(char *a, MY_DIGIT **digit);
> %include cpointer.i
> %pointer_functions(MY_DIGIT, md_prt);
Don't you mean md_ptr?

> %typemap(in) (char *a, MY_DIGIT **argv) {
>   /* Check if is a list */
>   if (PyList_Check($input)) {
>     int i;
>     $1 = PyList_Size($input);
>     $2 = (MY_DIGIT **) malloc(($1+1)*sizeof(long *));
>     for (i = 0; i < $1; i++) {
>       PyObject *o = PyList_GetItem($input,i);
>       if (PyString_Check(o))
> 	$2[i] = PyString_AsString(PyList_GetItem($input,i));
>       else {
> 	PyErr_SetString(PyExc_TypeError,"list must contain strings");
> 	free($2);
> 	return NULL;
>       }
>     }
>     $2[i] = 0;
>   } else {
>     PyErr_SetString(PyExc_TypeError,"not a list");
>     return NULL;
>   }
> }
> 
> %typemap(freearg) (char *a, MY_DIGIT **argv) {
>   free((MY_DIGIT *) $2);
> }
> 
> 
> ..from Python I am trying
> 
> >> ptr = []
> >> doIt("blah", ptr)
> 
> I thought this was the correct approach as described here:
> http://www.swig.org/Doc1.3/SWIGDocumentation.html#Python_nn59
> 
> However, python comes back and says "TypeError: argument number 2: a
> 'MY_DIGIT **' is expected, 'list([])' is received"
> 
> ..any ideas? 
Didn't check it but from http://www.swig.org/Doc1.3/Library.html it looks
like you need to do:
    ptr = new_md_prt()

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <mtebeka at qualcomm.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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