[Swig-user] swig handling of 0xffffffff as a UINT32 to wrapper C function from python

[Hongbin W. - S. <hon...@si...>]

I have a C function "void Uint32_Test(UINT32 num)". when I pass in a
0xffffffff as the argument from Python to the wrapper function, I get
"overflowerror : in method 'Uint32_Test', argument 1 of type 'UINT32'". 

 

Looking into the wrappers, I found that the error is generated at the
highlighted line of following method. Obviously 0xffffffff is being
treated as a singed value. What should I do if I still want to pass in
0xffffffff as a UINT32 for the wrapper function? Thanks.

 

SWIGINTERN int

SWIG_AsVal_unsigned_SS_long (PyObject *obj, unsigned long *val) 

{

  if (PyInt_Check(obj)) {

    long v = PyInt_AsLong(obj);

    if (v >= 0) {

      if (val) *val = v;

      return SWIG_OK;

    } else {

      return SWIG_OverflowError;

    }

  } else if (PyLong_Check(obj)) {

    unsigned long v = PyLong_AsUnsignedLong(obj);

    if (!PyErr_Occurred()) {

      if (val) *val = v;

      return SWIG_OK;

    } else {

      PyErr_Clear();

    }

  }

#ifdef SWIG_PYTHON_CAST_MODE

  {

    int dispatch = 0;

    unsigned long v = PyLong_AsUnsignedLong(obj);

    if (!PyErr_Occurred()) {

      if (val) *val = v;

      return SWIG_AddCast(SWIG_OK);

    } else {

      PyErr_Clear();

    }

    if (!dispatch) {

      double d;

      int res = SWIG_AddCast(SWIG_AsVal_double (obj,&d));

      if (SWIG_IsOK(res) && SWIG_CanCastAsInteger(&d, 0, ULONG_MAX)) {

       if (val) *val = (unsigned long)(d);

       return res;

      }

    }

  }

#endif

  return SWIG_TypeError;

}

 

Hongbin Wei

Firmware Engineer, SAS SSD

408.544.5879(o)

408.876.0659(m)