| 1 | n/a | import unittest |
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| 2 | n/a | from ctypes import * |
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| 3 | n/a | |
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| 4 | n/a | import _ctypes_test |
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| 5 | n/a | |
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| 6 | n/a | class ReturnFuncPtrTestCase(unittest.TestCase): |
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| 7 | n/a | |
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| 8 | n/a | def test_with_prototype(self): |
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| 9 | n/a | # The _ctypes_test shared lib/dll exports quite some functions for testing. |
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| 10 | n/a | # The get_strchr function returns a *pointer* to the C strchr function. |
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| 11 | n/a | dll = CDLL(_ctypes_test.__file__) |
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| 12 | n/a | get_strchr = dll.get_strchr |
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| 13 | n/a | get_strchr.restype = CFUNCTYPE(c_char_p, c_char_p, c_char) |
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| 14 | n/a | strchr = get_strchr() |
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| 15 | n/a | self.assertEqual(strchr(b"abcdef", b"b"), b"bcdef") |
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| 16 | n/a | self.assertEqual(strchr(b"abcdef", b"x"), None) |
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| 17 | n/a | self.assertEqual(strchr(b"abcdef", 98), b"bcdef") |
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| 18 | n/a | self.assertEqual(strchr(b"abcdef", 107), None) |
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| 19 | n/a | self.assertRaises(ArgumentError, strchr, b"abcdef", 3.0) |
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| 20 | n/a | self.assertRaises(TypeError, strchr, b"abcdef") |
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| 21 | n/a | |
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| 22 | n/a | def test_without_prototype(self): |
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| 23 | n/a | dll = CDLL(_ctypes_test.__file__) |
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| 24 | n/a | get_strchr = dll.get_strchr |
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| 25 | n/a | # the default 'c_int' would not work on systems where sizeof(int) != sizeof(void *) |
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| 26 | n/a | get_strchr.restype = c_void_p |
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| 27 | n/a | addr = get_strchr() |
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| 28 | n/a | # _CFuncPtr instances are now callable with an integer argument |
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| 29 | n/a | # which denotes a function address: |
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| 30 | n/a | strchr = CFUNCTYPE(c_char_p, c_char_p, c_char)(addr) |
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| 31 | n/a | self.assertTrue(strchr(b"abcdef", b"b"), "bcdef") |
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| 32 | n/a | self.assertEqual(strchr(b"abcdef", b"x"), None) |
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| 33 | n/a | self.assertRaises(ArgumentError, strchr, b"abcdef", 3.0) |
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| 34 | n/a | self.assertRaises(TypeError, strchr, b"abcdef") |
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| 35 | n/a | |
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| 36 | n/a | def test_from_dll(self): |
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| 37 | n/a | dll = CDLL(_ctypes_test.__file__) |
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| 38 | n/a | # _CFuncPtr instances are now callable with a tuple argument |
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| 39 | n/a | # which denotes a function name and a dll: |
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| 40 | n/a | strchr = CFUNCTYPE(c_char_p, c_char_p, c_char)(("my_strchr", dll)) |
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| 41 | n/a | self.assertTrue(strchr(b"abcdef", b"b"), "bcdef") |
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| 42 | n/a | self.assertEqual(strchr(b"abcdef", b"x"), None) |
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| 43 | n/a | self.assertRaises(ArgumentError, strchr, b"abcdef", 3.0) |
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| 44 | n/a | self.assertRaises(TypeError, strchr, b"abcdef") |
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| 45 | n/a | |
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| 46 | n/a | # Issue 6083: Reference counting bug |
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| 47 | n/a | def test_from_dll_refcount(self): |
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| 48 | n/a | class BadSequence(tuple): |
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| 49 | n/a | def __getitem__(self, key): |
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| 50 | n/a | if key == 0: |
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| 51 | n/a | return "my_strchr" |
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| 52 | n/a | if key == 1: |
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| 53 | n/a | return CDLL(_ctypes_test.__file__) |
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| 54 | n/a | raise IndexError |
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| 55 | n/a | |
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| 56 | n/a | # _CFuncPtr instances are now callable with a tuple argument |
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| 57 | n/a | # which denotes a function name and a dll: |
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| 58 | n/a | strchr = CFUNCTYPE(c_char_p, c_char_p, c_char)( |
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| 59 | n/a | BadSequence(("my_strchr", CDLL(_ctypes_test.__file__)))) |
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| 60 | n/a | self.assertTrue(strchr(b"abcdef", b"b"), "bcdef") |
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| 61 | n/a | self.assertEqual(strchr(b"abcdef", b"x"), None) |
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| 62 | n/a | self.assertRaises(ArgumentError, strchr, b"abcdef", 3.0) |
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| 63 | n/a | self.assertRaises(TypeError, strchr, b"abcdef") |
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| 64 | n/a | |
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| 65 | n/a | if __name__ == "__main__": |
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| 66 | n/a | unittest.main() |
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