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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