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bpo-32745: Fix a regression in the handling of ctypes' c_wchar_p type (#8721)

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Embedded nulls would cause a ValueError to be raised. Thanks go to
Eryk Sun for their analysis.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
This commit is contained in:
Zackery Spytz 2021-05-02 03:40:01 -07:00 • committed by GitHub
parent 518f8b5dd5
commit 73766b0341
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3 changed files with 13 additions and 1 deletions
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8
Lib/ctypes/test/test_unicode.py
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@ -26,6 +26,14 @@ class UnicodeTestCase(unittest.TestCase):
self.assertEqual(buf[::2], 'a\xe4\xfc')
self.assertEqual(buf[6:5:-1], "")
def test_embedded_null(self):
class TestStruct(ctypes.Structure):
_fields_ = [("unicode", ctypes.c_wchar_p)]
t = TestStruct()
# This would raise a ValueError:
t.unicode = "foo\0bar\0\0"
func = ctypes.CDLL(_ctypes_test.__file__)._testfunc_p_p
class StringTestCase(UnicodeTestCase):