swig/python/python.i

   1 /* =========================================================================
   2  * Copyright 2005-2007 Charlie Savage, cfis@interserv.com
   3  *
   4  * Interface for a SWIG generated geos module.
   5  *
   6  * This is free software; you can redistribute and/or modify it under
   7  * the terms of the GNU Lesser General Public Licence as published
   8  * by the Free Software Foundation.
   9  * See the COPYING file for more information.
  10  *
  11  * ========================================================================= */
  12
  13 /* Convert a Ruby array of GeosLinearRings to a C array. */
  14 %typemap(in,numinputs=1) (GeosLinearRing **holes, size_t nholes)
  15 {
  16     if ($input == Py_None)
  17     {
  18         $1 = NULL;
  19         $2 = 0;
  20     }
  21     else
  22     {
  23         /* Make sure the input can be treated as an array. */
  24         if (!PySequence_Check($input))
  25             SWIG_exception_fail(SWIG_RuntimeError, "in method '" "createPolygon" "', argument " "1"" of type '" "GeosLinearRing *""'");
  26
  27         /* Get the length */
  28         $2 = PySequence_Size($input);
  29
  30         /* Allocate space for the C array. */
  31         $1 = (GeosLinearRing**) malloc($2*sizeof(GeosLinearRing*));
  32
  33         for(size_t i = 0; i<$2; i++)
  34         {
  35             /* Get the Python Object */
  36             PyObject *item = PySequence_GetItem($input,i);
  37
  38             /* Get the underlying pointer and give up ownership of it. */
  39             GeosLinearRing *ring = NULL;
  40             int convertResult = SWIG_ConvertPtr(item, (void**)&ring, $descriptor(GeosLinearRing*), SWIG_POINTER_DISOWN);
  41             if (!SWIG_IsOK(convertResult)) {
  42                 SWIG_exception_fail(SWIG_ArgError(convertResult), "in method '" "createPolygon" "', argument " "1"" of type '" "GeosLinearRing *""'");
  43             }
  44
  45             /* Put the pointer in the array */
  46             $1[i] = ring;
  47         }
  48     }
  49 }
  50
  51 %typemap(freearg)  (GeosLinearRing **holes, size_t nholes)
  52 {
  53   if ($1) {
  54     free((void*) $1);
  55   }
  56 }