[pywin32-bugs] [ pywin32-Bugs-3152800 ] gen_py fails to map type correctly

[SourceForge.net <no...@so...>]

Bugs item #3152800, was opened at 2011-01-07 08:57
Message generated for change (Tracker Item Submitted) made by kahlbutz
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=551954&aid=3152800&group_id=78018

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: com
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Klaus Noekel (kahlbutz)
Assigned to: Nobody/Anonymous (nobody)
Summary: gen_py fails to map type correctly

Initial Comment:
Hi,

I am calling a COM server (written in C++) from Python. The COM server defines methods:

interface IMatrix : IDispatch
{
...
  [id(14), helpstring ("Copy matrix contents to a pointer to a C-style 2D double array")]  HRESULT GetValuesRaw ( [in] unsigned int hi, [in] unsigned int lo); 
  [id(15), helpstring ("Copy matrix contents from a pointer to a C-style 2D double array")]  HRESULT SetValuesRaw ( [in] unsigned int hi, [in] unsigned int lo); 
}

Pywin32 does not pick up the unsigned int, but generates

	def GetValuesRaw(self, hi=defaultNamedNotOptArg, lo=defaultNamedNotOptArg):
		"""Copy matrix contents to a pointer to a C-style 2D double array"""
		return self._oleobj_.InvokeTypes(14, LCID, 1, (24, 0), ((3, 1), (3, 1)),hi
			, lo)

where the type id 3 stands for VT_I4 instead of VT_UI4. As you would expect this fails the first time bit 31 of hi or lo is set. 

Is it a bug in pywin32?
If not, how can I influence gen_py so that it correctly recognizes the type? Do I have to write the IDL differently? Can I include hints?
Finally, what I really want to achieve is pass a 64-bit pointer from Python to the C++ COM server. Splitting it into the 32-bit hi/lo parts and passing them separately is my current solution. Am I overlooking a better option?

Thanks and best regards,
Klaus Noekel

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=551954&aid=3152800&group_id=78018