wxPython/src/my_fragments.i

   1 // These fragments are inserted in modules that need to convert PyObjects to
   2 // integer values, my versions allow any numeric type to be used, as long as
   3 // it can be converted to a PyInt.  (Specifically, I allow floats where the
   4 // default SWIG_AsVal_long would just raise an exception.
   5 //
   6 // NOTE: This file has to be %included very early in the SWIGging process as
   7 // it no longer allows existing fragments to be replaced with one of the same
   8 // name.  So to make this work I had to bring a copy of python.swg into this
   9 // project and do the %include there before most other of the standard swiglib
  10 // files are %included.  This may change in 1.3.23, so adjust accordingly then.
  11
  12
  13
  14 %fragment(SWIG_AsVal_frag(long), "header") {
  15 // See my_fragments.i
  16 SWIGSTATICINLINE(int)
  17 SWIG_AsVal(long)(PyObject* obj, long* val)
  18 {
  19     if (PyNumber_Check(obj)) {
  20         if (val) *val = PyInt_AsLong(obj);
  21         return 1;
  22     }
  23     else {
  24         PyObject* errmsg = PyString_FromFormat("Expected number, got %s",
  25                                                obj->ob_type->tp_name);
  26         PyErr_SetObject(PyExc_TypeError, errmsg);
  27         Py_DECREF(errmsg);
  28     }
  29     return 0;
  30 }
  31 }
  32
  33
  34 %fragment(SWIG_AsVal_frag(unsigned long), "header",
  35           fragment=SWIG_AsVal_frag(long)) {
  36 // See my_fragments.i
  37 SWIGSTATICINLINE(int)
  38 SWIG_AsVal(unsigned long)(PyObject* obj, unsigned long* val)
  39 {
  40     long v = 0;
  41     if (SWIG_AsVal_long(obj, &v) && v < 0) {
  42         PyErr_SetString(PyExc_TypeError, "negative value received for unsigned type");
  43         return 0;
  44     }
  45     else if (val)
  46         *val = (unsigned long)v;
  47     return 1;
  48 }
  49 }
  50
  51
  52 %fragment(SWIG_AsVal_frag(double), "header") {
  53 // See my_fragments.i
  54 SWIGSTATICINLINE(int)
  55 SWIG_AsVal(double)(PyObject *obj, double* val)
  56 {
  57     if (PyNumber_Check(obj)) {
  58         if (val) *val = PyFloat_AsDouble(obj);
  59         return 1;
  60     }
  61     else {
  62         PyObject* errmsg = PyString_FromFormat("Expected number, got %s",
  63                                                obj->ob_type->tp_name);
  64         PyErr_SetObject(PyExc_TypeError, errmsg);
  65         Py_DECREF(errmsg);
  66     }
  67     return 0;
  68 }
  69 }