Better conversion functions for integral and floating point types,

allows truncated floats to be used where integers are expeceted,
raises more meaningful exceptions, etc.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26502 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/my_typemaps.i

@@ -273,6 +273,62 @@
 }
 
 
+// These fragments are iserted in modules that need to convert PyObjects to
+// integer values, my versions allow any numeric type to be used, as long as
+// it can be converted to a PyInt.  (Specifically, I allow floats where the
+// default SWIG_AsLong would raise an obsucre exception from within
+// PyLong_AsLong.)
+
+%fragment("SWIG_AsLong","header") %{
+SWIGSTATICINLINE(long)
+SWIG_AsLong(PyObject * obj)
+{
+    if (PyNumber_Check(obj))
+        return PyInt_AsLong(obj);
+    else {
+        PyObject* errmsg = PyString_FromFormat("Expected number, got %s",
+                                               obj->ob_type->tp_name);
+        PyErr_SetObject(PyExc_TypeError, errmsg);
+        Py_DECREF(errmsg);
+        return 0;
+    }
+}
+%}
+
+%fragment("SWIG_AsUnsignedLong","header", fragment="SWIG_AsLong") %{
+SWIGSTATICINLINE(unsigned long)
+SWIG_AsUnsignedLong(PyObject * obj) 
+{
+  if (PyLong_Check(obj)) {
+    return PyLong_AsUnsignedLong(obj);
+  } else {
+    long i = SWIG_AsLong(obj);
+    if ( !PyErr_Occurred() && (i < 0)) {
+      PyErr_SetString(PyExc_TypeError, "negative value received for unsigned type");
+    }
+    return i;
+  }
+}
+%}
+
+
+%fragment("SWIG_AsDouble","header") %{
+SWIGSTATICINLINE(double)
+SWIG_AsDouble(PyObject *obj)
+{
+    if (PyNumber_Check(obj))
+        return PyFloat_AsDouble(obj);
+    else {
+        PyObject* errmsg = PyString_FromFormat("Expected number, got %s",
+                                               obj->ob_type->tp_name);
+        PyErr_SetObject(PyExc_TypeError, errmsg);
+        Py_DECREF(errmsg);
+        return 0;
+    }
+}
+%}
+
+
 //---------------------------------------------------------------------------
 // Typemap for when GDI objects are returned by reference.  This will cause a
 // copy to be made instead of returning a reference to the same instance.  The