String Arrays

Hello, a few thoughts:

Yes, as far as I know typemaps will fix you problem (sample later)
> 
> #include <stdio.h>
> 
> char (*test (void))[33]
> {
>     static char output[2][33];
> 
>     sprintf (output[0], "Test");
>     sprintf (output[1], "More");
> 
>     return (&output[0]);
> }
> 
I couldnt see a good way to deal with this one.
You end up with a pointer, but not much info on how many strings you get.

So I rewrote the code to take the array & fill it instead:

void get_strings(char output[][33],int* len)
{
  sprintf (output[0], "Test");
  sprintf (output[1], "More");
  *len=2;
}

This can we wrappered with the following typemap:

/* this first typemap tells SWIG how to deal with the
 input side of the function.
 it declared 2 variables (char output[10][33], int len)
 prepares them for calling into the function
 and tells SWIG that it should not expect any parameters in */
%typemap(in, numinputs=0) (char output[][33],int* len) 
                             (char output[10][33], int len)
{
        $1 = output;
        $2 = &len;
}
/* this second typemap is for the returning of the data after the fn call
it takes the array & converts to a python array
*/
%typemap(argout) (char output[][33],int* len) 
                    (int i,PyObject *t) 
{
  Py_XDECREF($result);   // throw away any previous result
                          // (not such a good idea...)
  $result= PyList_New(*$2); // make a list of length *len
  for (i = 0; i < *$2; ++i)
  {
    t=PyString_FromString($1[i]); // c-string to py-string
    PyList_SetItem($result, i, t); // add to the list
  }
}

After swigging (I used Windows & Mingw to compile this & ran on python 2.2.1)

>>> import test
>>> print test.get_strings()
['Test', 'More']
>>>

Hope this helps

Mark  <:8)~
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