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Merged revisions 63791-63792 via svnmerge from

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svn+ssh://pythondev@svn.python.org/python/trunk

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  r63791 | thomas.heller | 2008-05-29 21:18:12 +0200 (Do, 29 Mai 2008) | 1 line

  Fix compiler warning.
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  r63792 | thomas.heller | 2008-05-29 21:42:34 +0200 (Do, 29 Mai 2008) | 1 line

  ctypes NULL function pointers have a boolean False value now.
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This commit is contained in:
Thomas Heller 2008-05-29 19:54:39 +00:00
parent 61dbbf02b6
commit 7dca3ebc97
2 changed files with 29 additions and 21 deletions
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8
Lib/ctypes/test/test_pointers.py
View File

@ -175,5 +175,13 @@ class PointersTestCase(unittest.TestCase):
self.assertRaises(TypeError, c_void_p, 3.14) # make sure floats are NOT accepted
self.assertRaises(TypeError, c_void_p, object()) # nor other objects
def test_pointers_bool(self):
# NULL pointers have a boolean False value, non-NULL pointers True.
self.failUnlessEqual(bool(POINTER(c_int)()), False)
self.failUnlessEqual(bool(pointer(c_int())), True)
self.failUnlessEqual(bool(CFUNCTYPE(None)(0)), False)
self.failUnlessEqual(bool(CFUNCTYPE(None)(42)), True)
if __name__ == '__main__':
unittest.main()

42
Modules/_ctypes/_ctypes.c
View File

@ -474,7 +474,7 @@ GenericCData_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
static PyObject *
CDataType_from_buffer_copy(PyObject *type, PyObject *args)
{
void *buffer;
const void *buffer;
Py_ssize_t buffer_len;
Py_ssize_t offset = 0;
PyObject *obj, *result;
@ -3849,6 +3849,25 @@ CFuncPtr_repr(CFuncPtrObject *self)
self);
}
static int
Pointer_bool(CDataObject *self)
{
return *(void **)self->b_ptr != NULL;
}
static PyNumberMethods Pointer_as_number = {
0, /* nb_add */
0, /* nb_subtract */
0, /* nb_multiply */
0, /* nb_remainder */
0, /* nb_divmod */
0, /* nb_power */
0, /* nb_negative */
0, /* nb_positive */
0, /* nb_absolute */
(inquiry)Pointer_bool, /* nb_bool */
};
PyTypeObject CFuncPtr_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"_ctypes.CFuncPtr",
@ -3860,7 +3879,7 @@ PyTypeObject CFuncPtr_Type = {
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc)CFuncPtr_repr, /* tp_repr */
0, /* tp_as_number */
&Pointer_as_number, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
@ -4933,25 +4952,6 @@ static PyMappingMethods Pointer_as_mapping = {
Pointer_subscript,
};
static int
Pointer_bool(CDataObject *self)
{
return *(void **)self->b_ptr != NULL;
}
static PyNumberMethods Pointer_as_number = {
0, /* nb_add */
0, /* nb_subtract */
0, /* nb_multiply */
0, /* nb_remainder */
0, /* nb_divmod */
0, /* nb_power */
0, /* nb_negative */
0, /* nb_positive */
0, /* nb_absolute */
(inquiry)Pointer_bool, /* nb_bool */
};
PyTypeObject Pointer_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"_ctypes._Pointer",