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__pycache__	[ DIR ]	drwxr-xr-x	2026-05-05 23:07
__init__.py	445 B	-rw-r--r--	2026-03-03 04:22
__main__.py	68 B	-rw-r--r--	2026-03-03 04:22
test_anon.py	2.48 KB	-rw-r--r--	2026-03-03 04:22
test_array_in_pointer.py	1.7 KB	-rw-r--r--	2026-03-03 04:22
test_arrays.py	7.33 KB	-rw-r--r--	2026-03-03 04:22
test_as_parameter.py	7.08 KB	-rw-r--r--	2026-03-03 04:22
test_bitfields.py	10.11 KB	-rw-r--r--	2026-03-03 04:22
test_buffers.py	2.55 KB	-rw-r--r--	2026-03-03 04:22
test_bytes.py	1.94 KB	-rw-r--r--	2026-03-03 04:22
test_byteswap.py	13.09 KB	-rw-r--r--	2026-03-03 04:22
test_callbacks.py	10.38 KB	-rw-r--r--	2026-03-03 04:22
test_cast.py	3.64 KB	-rw-r--r--	2026-03-03 04:22
test_cfuncs.py	7.69 KB	-rw-r--r--	2026-03-03 04:22
test_checkretval.py	968 B	-rw-r--r--	2026-03-03 04:22
test_delattr.py	533 B	-rw-r--r--	2026-03-03 04:22
test_errno.py	2.12 KB	-rw-r--r--	2026-03-03 04:22
test_find.py	4.43 KB	-rw-r--r--	2026-03-03 04:22
test_frombuffer.py	5.09 KB	-rw-r--r--	2026-03-03 04:22
test_funcptr.py	3.93 KB	-rw-r--r--	2026-03-03 04:22
test_functions.py	12.03 KB	-rw-r--r--	2026-03-03 04:22
test_incomplete.py	1023 B	-rw-r--r--	2026-03-03 04:22
test_init.py	1.01 KB	-rw-r--r--	2026-03-03 04:22
test_internals.py	2.57 KB	-rw-r--r--	2026-03-03 04:22
test_keeprefs.py	3.18 KB	-rw-r--r--	2026-03-03 04:22
test_libc.py	1005 B	-rw-r--r--	2026-03-03 04:22
test_loading.py	7.1 KB	-rw-r--r--	2026-03-03 04:22
test_macholib.py	4.45 KB	-rw-r--r--	2026-03-03 04:22
test_memfunctions.py	3.22 KB	-rw-r--r--	2026-03-03 04:22
test_numbers.py	7.09 KB	-rw-r--r--	2026-03-03 04:22
test_objects.py	1.64 KB	-rw-r--r--	2026-03-03 04:22
test_parameters.py	10.81 KB	-rw-r--r--	2026-03-03 04:22
test_pep3118.py	8.48 KB	-rw-r--r--	2026-03-03 04:22
test_pickling.py	2.17 KB	-rw-r--r--	2026-03-03 04:22
test_pointers.py	7.07 KB	-rw-r--r--	2026-03-03 04:22
test_prototypes.py	6.68 KB	-rw-r--r--	2026-03-03 04:22
test_python_api.py	2.7 KB	-rw-r--r--	2026-03-03 04:22
test_random_things.py	2.77 KB	-rw-r--r--	2026-03-03 04:22
test_refcounts.py	3.06 KB	-rw-r--r--	2026-03-03 04:22
test_repr.py	842 B	-rw-r--r--	2026-03-03 04:22
test_returnfuncptrs.py	2.83 KB	-rw-r--r--	2026-03-03 04:22
test_simplesubclasses.py	1.26 KB	-rw-r--r--	2026-03-03 04:22
test_sizes.py	804 B	-rw-r--r--	2026-03-03 04:22
test_slicing.py	5.88 KB	-rw-r--r--	2026-03-03 04:22
test_stringptr.py	2.54 KB	-rw-r--r--	2026-03-03 04:22
test_strings.py	4.29 KB	-rw-r--r--	2026-03-03 04:22
test_struct_fields.py	3.08 KB	-rw-r--r--	2026-03-03 04:22
test_structures.py	30.95 KB	-rw-r--r--	2026-03-03 04:22
test_unaligned_structures.py	1.11 KB	-rw-r--r--	2026-03-03 04:22
test_unicode.py	1.95 KB	-rw-r--r--	2026-03-03 04:22
test_values.py	4.03 KB	-rw-r--r--	2026-03-03 04:22
test_varsize_struct.py	1.8 KB	-rw-r--r--	2026-03-03 04:22
test_win32.py	4.91 KB	-rw-r--r--	2026-03-03 04:22
test_wintypes.py	1.36 KB	-rw-r--r--	2026-03-03 04:22

Rename

"""
A testcase which accesses *values* in a dll.
"""

import _imp
import importlib.util
import unittest
import sys
from ctypes import *
from test.support import import_helper

import _ctypes_test

class ValuesTestCase(unittest.TestCase):

def test_an_integer(self):
        # This test checks and changes an integer stored inside the
        # _ctypes_test dll/shared lib.
        ctdll = CDLL(_ctypes_test.__file__)
        an_integer = c_int.in_dll(ctdll, "an_integer")
        x = an_integer.value
        self.assertEqual(x, ctdll.get_an_integer())
        an_integer.value *= 2
        self.assertEqual(x*2, ctdll.get_an_integer())
        # To avoid test failures when this test is repeated several
        # times the original value must be restored
        an_integer.value = x
        self.assertEqual(x, ctdll.get_an_integer())

def test_undefined(self):
        ctdll = CDLL(_ctypes_test.__file__)
        self.assertRaises(ValueError, c_int.in_dll, ctdll, "Undefined_Symbol")

class PythonValuesTestCase(unittest.TestCase):
    """This test only works when python itself is a dll/shared library"""

def test_optimizeflag(self):
        # This test accesses the Py_OptimizeFlag integer, which is
        # exported by the Python dll and should match the sys.flags value

opt = c_int.in_dll(pythonapi, "Py_OptimizeFlag").value
        self.assertEqual(opt, sys.flags.optimize)

def test_frozentable(self):
        # Python exports a PyImport_FrozenModules symbol. This is a
        # pointer to an array of struct _frozen entries.  The end of the
        # array is marked by an entry containing a NULL name and zero
        # size.

# In standard Python, this table contains a __hello__
        # module, and a __phello__ package containing a spam
        # module.
        class struct_frozen(Structure):
            _fields_ = [("name", c_char_p),
                        ("code", POINTER(c_ubyte)),
                        ("size", c_int),
                        ("is_package", c_int),
                        ("get_code", POINTER(c_ubyte)),  # Function ptr
                        ]
        FrozenTable = POINTER(struct_frozen)

modules = []
        for group in ["Bootstrap", "Stdlib", "Test"]:
            ft = FrozenTable.in_dll(pythonapi, f"_PyImport_Frozen{group}")
            # ft is a pointer to the struct_frozen entries:
            for entry in ft:
                # This is dangerous. We *can* iterate over a pointer, but
                # the loop will not terminate (maybe with an access
                # violation;-) because the pointer instance has no size.
                if entry.name is None:
                    break
                modname = entry.name.decode("ascii")
                modules.append(modname)
                with self.subTest(modname):
                    if entry.size != 0:
                        # Do a sanity check on entry.size and entry.code.
                        self.assertGreater(abs(entry.size), 10)
                        self.assertTrue([entry.code[i] for i in range(abs(entry.size))])
                    # Check the module's package-ness.
                    with import_helper.frozen_modules():
                        spec = importlib.util.find_spec(modname)
                    if entry.is_package:
                        # It's a package.
                        self.assertIsNotNone(spec.submodule_search_locations)
                    else:
                        self.assertIsNone(spec.submodule_search_locations)

with import_helper.frozen_modules():
            expected = _imp._frozen_module_names()
        self.maxDiff = None
        self.assertEqual(modules, expected,
                         "_PyImport_FrozenBootstrap example "
                         "in Doc/library/ctypes.rst may be out of date")

from ctypes import _pointer_type_cache
        del _pointer_type_cache[struct_frozen]

def test_undefined(self):
        self.assertRaises(ValueError, c_int.in_dll, pythonapi,
                          "Undefined_Symbol")

if __name__ == '__main__':
    unittest.main()