Bugs item #1545696, was opened at 2006-08-24 00:07
Message generated for change (Comment added) made by rupole
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Category: None
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Roger Upole (rupole)
Assigned to: Nobody/Anonymous (nobody)
Summary: structmember T_LONG won't accept a python long
Initial Comment:
An attribute defined as T_LONG throws a vague error
when set to a python long, even when the value is
within the range of a LONG.
TypeError: bad argument type for built-in operation
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>Comment By: Roger Upole (rupole)
Date: 2006-08-27 21:23
Message:
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In the process of creating a patch for this, I came across
some more 'ugh'-liness. T_UINT's are returned via
PyInt_FromLong, so you actually get back a negative value
for large numbers. Changing it to use
PyLong_FromUnsignedLong will break backward compatibility,
but this is so wrong I can't possibly see keeping it. Your
call. (plus it makes it impossible to test T_UINT with
values larger than INT_MAX)
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Comment By: Neal Norwitz (nnorwitz)
Date: 2006-08-24 19:52
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Ugh. This code is lax in checking/conversion. Do you think
you could provide a patch?
All of the int cases should call PyInt_AsLong() if this call
fails (returns -1), then that should be returned from
PyMember_SetOne. If it succeeds, there should be a range
check that ensures the value is valid. If that fails a
warning should be produced. We need to issue a warning
rather than an error for backwards compatability (at least
for 2.6).
The float/double cases can be simplified some by calling
PyFloat_AsDouble and doing similar checks as in the int cases.
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Comment By: Roger Upole (rupole)
Date: 2006-08-24 14:56
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The DEVMODE object from pywintypes has attributes defined
as T_LONG via the structmember API.
>>> import pywintypes
>>> dm=pywintypes.DEVMODEType()
>>> dm.Position_x=3
>>> dm.Position_x
3
>>> dm.Position_x=long(3)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: bad argument type for built-in operation
>>>
Here's the relevant code from structmember.c
that throws the error:
case T_LONG:
if (!PyInt_Check(v)) {
PyErr_BadArgument();
return -1;
}
*(long*)addr = PyInt_AsLong(v);
break;
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Comment By: Neal Norwitz (nnorwitz)
Date: 2006-08-24 13:30
Message:
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Can you provide example code that demonstrates what you mean?
----------------------------------------------------------------------
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