Implement mstro_cdo argout typemap

scripting/maestro-py.i

@@ -4,12 +4,46 @@
 %include "cpointer.i"
 %include "exception.i"
 
-/* handling mstro_status return codes: suppress unless an error needs to be indicated. In that case: throw exeption */
+/* No identifier conversion here. PEP-8 says
+ *
+ * > Function names should be lowercase, with words separated by underscores as
+ * > necessary to improve readability.
+ *
+ * so our C API will be just fine.
+ */
+
+/***** typemaps *****/
+/* mstro_status codes: suppress unless an error needs to be indicated. In that case: throw exeption */
 %typemap(out) mstro_status  {
+  $result = SWIG_Py_Void();
   if(MSTRO_OK!=$1) {
     SWIG_exception(SWIG_RuntimeError, mstro_status_description($1));
+  }
+}
+
+/* CDO return values: */
+%typemap(in, numinputs=0) mstro_cdo *result (mstro_cdo temp) {
+  $1 = &temp;
+}
+
+%typemap(argout) mstro_cdo *result {
+  /* Create shadow object (do not use SWIG_POINTER_NEW) */
+  PyObject * temp = SWIG_NewPointerObj(*$1,
+                                       $descriptor(mstro_cdo),
+                                       SWIG_POINTER_NEW);
+  /* if multiple results: ensure result is a list */
+  if(VOID_Object==$result) {
+    /* we're producing the first result */
+    $result = temp;
   } else {
-   $result = SWIG_Py_Void();
+    /* coerce previous result to list and append */
+    if (!PyList_Check($result)) {
+      PyObject * tt = $result;
+      $result = PyList_New(1);
+      PyList_SetItem($result, 0, tt);
+    }
+    PyList_Append($result, temp);
+    Py_DECREF(temp);
   }
 }