| 1 | n/a | from ctypes import * |
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| 2 | n/a | from ctypes.test import need_symbol |
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| 3 | n/a | import unittest |
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| 4 | n/a | import sys |
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| 5 | n/a | |
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| 6 | n/a | class Test(unittest.TestCase): |
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| 7 | n/a | |
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| 8 | n/a | def test_array2pointer(self): |
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| 9 | n/a | array = (c_int * 3)(42, 17, 2) |
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| 10 | n/a | |
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| 11 | n/a | # casting an array to a pointer works. |
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| 12 | n/a | ptr = cast(array, POINTER(c_int)) |
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| 13 | n/a | self.assertEqual([ptr[i] for i in range(3)], [42, 17, 2]) |
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| 14 | n/a | |
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| 15 | n/a | if 2*sizeof(c_short) == sizeof(c_int): |
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| 16 | n/a | ptr = cast(array, POINTER(c_short)) |
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| 17 | n/a | if sys.byteorder == "little": |
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| 18 | n/a | self.assertEqual([ptr[i] for i in range(6)], |
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| 19 | n/a | [42, 0, 17, 0, 2, 0]) |
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| 20 | n/a | else: |
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| 21 | n/a | self.assertEqual([ptr[i] for i in range(6)], |
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| 22 | n/a | [0, 42, 0, 17, 0, 2]) |
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| 23 | n/a | |
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| 24 | n/a | def test_address2pointer(self): |
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| 25 | n/a | array = (c_int * 3)(42, 17, 2) |
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| 26 | n/a | |
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| 27 | n/a | address = addressof(array) |
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| 28 | n/a | ptr = cast(c_void_p(address), POINTER(c_int)) |
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| 29 | n/a | self.assertEqual([ptr[i] for i in range(3)], [42, 17, 2]) |
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| 30 | n/a | |
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| 31 | n/a | ptr = cast(address, POINTER(c_int)) |
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| 32 | n/a | self.assertEqual([ptr[i] for i in range(3)], [42, 17, 2]) |
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| 33 | n/a | |
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| 34 | n/a | def test_p2a_objects(self): |
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| 35 | n/a | array = (c_char_p * 5)() |
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| 36 | n/a | self.assertEqual(array._objects, None) |
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| 37 | n/a | array[0] = b"foo bar" |
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| 38 | n/a | self.assertEqual(array._objects, {'0': b"foo bar"}) |
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| 39 | n/a | |
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| 40 | n/a | p = cast(array, POINTER(c_char_p)) |
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| 41 | n/a | # array and p share a common _objects attribute |
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| 42 | n/a | self.assertIs(p._objects, array._objects) |
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| 43 | n/a | self.assertEqual(array._objects, {'0': b"foo bar", id(array): array}) |
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| 44 | n/a | p[0] = b"spam spam" |
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| 45 | n/a | self.assertEqual(p._objects, {'0': b"spam spam", id(array): array}) |
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| 46 | n/a | self.assertIs(array._objects, p._objects) |
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| 47 | n/a | p[1] = b"foo bar" |
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| 48 | n/a | self.assertEqual(p._objects, {'1': b'foo bar', '0': b"spam spam", id(array): array}) |
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| 49 | n/a | self.assertIs(array._objects, p._objects) |
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| 50 | n/a | |
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| 51 | n/a | def test_other(self): |
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| 52 | n/a | p = cast((c_int * 4)(1, 2, 3, 4), POINTER(c_int)) |
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| 53 | n/a | self.assertEqual(p[:4], [1,2, 3, 4]) |
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| 54 | n/a | self.assertEqual(p[:4:], [1, 2, 3, 4]) |
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| 55 | n/a | self.assertEqual(p[3:-1:-1], [4, 3, 2, 1]) |
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| 56 | n/a | self.assertEqual(p[:4:3], [1, 4]) |
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| 57 | n/a | c_int() |
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| 58 | n/a | self.assertEqual(p[:4], [1, 2, 3, 4]) |
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| 59 | n/a | self.assertEqual(p[:4:], [1, 2, 3, 4]) |
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| 60 | n/a | self.assertEqual(p[3:-1:-1], [4, 3, 2, 1]) |
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| 61 | n/a | self.assertEqual(p[:4:3], [1, 4]) |
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| 62 | n/a | p[2] = 96 |
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| 63 | n/a | self.assertEqual(p[:4], [1, 2, 96, 4]) |
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| 64 | n/a | self.assertEqual(p[:4:], [1, 2, 96, 4]) |
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| 65 | n/a | self.assertEqual(p[3:-1:-1], [4, 96, 2, 1]) |
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| 66 | n/a | self.assertEqual(p[:4:3], [1, 4]) |
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| 67 | n/a | c_int() |
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| 68 | n/a | self.assertEqual(p[:4], [1, 2, 96, 4]) |
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| 69 | n/a | self.assertEqual(p[:4:], [1, 2, 96, 4]) |
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| 70 | n/a | self.assertEqual(p[3:-1:-1], [4, 96, 2, 1]) |
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| 71 | n/a | self.assertEqual(p[:4:3], [1, 4]) |
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| 72 | n/a | |
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| 73 | n/a | def test_char_p(self): |
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| 74 | n/a | # This didn't work: bad argument to internal function |
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| 75 | n/a | s = c_char_p(b"hiho") |
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| 76 | n/a | self.assertEqual(cast(cast(s, c_void_p), c_char_p).value, |
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| 77 | n/a | b"hiho") |
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| 78 | n/a | |
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| 79 | n/a | @need_symbol('c_wchar_p') |
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| 80 | n/a | def test_wchar_p(self): |
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| 81 | n/a | s = c_wchar_p("hiho") |
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| 82 | n/a | self.assertEqual(cast(cast(s, c_void_p), c_wchar_p).value, |
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| 83 | n/a | "hiho") |
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| 84 | n/a | |
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| 85 | n/a | if __name__ == "__main__": |
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| 86 | n/a | unittest.main() |
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