| 1 | n/a | import unittest |
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| 2 | n/a | from test import support |
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| 3 | n/a | from ctypes import * |
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| 4 | n/a | |
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| 5 | n/a | import _ctypes_test |
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| 6 | n/a | |
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| 7 | n/a | lib = CDLL(_ctypes_test.__file__) |
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| 8 | n/a | |
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| 9 | n/a | class StringPtrTestCase(unittest.TestCase): |
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| 10 | n/a | |
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| 11 | n/a | @support.refcount_test |
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| 12 | n/a | def test__POINTER_c_char(self): |
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| 13 | n/a | class X(Structure): |
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| 14 | n/a | _fields_ = [("str", POINTER(c_char))] |
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| 15 | n/a | x = X() |
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| 16 | n/a | |
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| 17 | n/a | # NULL pointer access |
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| 18 | n/a | self.assertRaises(ValueError, getattr, x.str, "contents") |
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| 19 | n/a | b = c_buffer(b"Hello, World") |
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| 20 | n/a | from sys import getrefcount as grc |
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| 21 | n/a | self.assertEqual(grc(b), 2) |
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| 22 | n/a | x.str = b |
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| 23 | n/a | self.assertEqual(grc(b), 3) |
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| 24 | n/a | |
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| 25 | n/a | # POINTER(c_char) and Python string is NOT compatible |
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| 26 | n/a | # POINTER(c_char) and c_buffer() is compatible |
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| 27 | n/a | for i in range(len(b)): |
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| 28 | n/a | self.assertEqual(b[i], x.str[i]) |
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| 29 | n/a | |
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| 30 | n/a | self.assertRaises(TypeError, setattr, x, "str", "Hello, World") |
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| 31 | n/a | |
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| 32 | n/a | def test__c_char_p(self): |
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| 33 | n/a | class X(Structure): |
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| 34 | n/a | _fields_ = [("str", c_char_p)] |
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| 35 | n/a | x = X() |
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| 36 | n/a | |
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| 37 | n/a | # c_char_p and Python string is compatible |
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| 38 | n/a | # c_char_p and c_buffer is NOT compatible |
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| 39 | n/a | self.assertEqual(x.str, None) |
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| 40 | n/a | x.str = b"Hello, World" |
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| 41 | n/a | self.assertEqual(x.str, b"Hello, World") |
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| 42 | n/a | b = c_buffer(b"Hello, World") |
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| 43 | n/a | self.assertRaises(TypeError, setattr, x, b"str", b) |
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| 44 | n/a | |
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| 45 | n/a | |
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| 46 | n/a | def test_functions(self): |
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| 47 | n/a | strchr = lib.my_strchr |
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| 48 | n/a | strchr.restype = c_char_p |
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| 49 | n/a | |
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| 50 | n/a | # c_char_p and Python string is compatible |
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| 51 | n/a | # c_char_p and c_buffer are now compatible |
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| 52 | n/a | strchr.argtypes = c_char_p, c_char |
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| 53 | n/a | self.assertEqual(strchr(b"abcdef", b"c"), b"cdef") |
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| 54 | n/a | self.assertEqual(strchr(c_buffer(b"abcdef"), b"c"), b"cdef") |
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| 55 | n/a | |
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| 56 | n/a | # POINTER(c_char) and Python string is NOT compatible |
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| 57 | n/a | # POINTER(c_char) and c_buffer() is compatible |
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| 58 | n/a | strchr.argtypes = POINTER(c_char), c_char |
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| 59 | n/a | buf = c_buffer(b"abcdef") |
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| 60 | n/a | self.assertEqual(strchr(buf, b"c"), b"cdef") |
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| 61 | n/a | self.assertEqual(strchr(b"abcdef", b"c"), b"cdef") |
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| 62 | n/a | |
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| 63 | n/a | # XXX These calls are dangerous, because the first argument |
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| 64 | n/a | # to strchr is no longer valid after the function returns! |
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| 65 | n/a | # So we must keep a reference to buf separately |
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| 66 | n/a | |
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| 67 | n/a | strchr.restype = POINTER(c_char) |
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| 68 | n/a | buf = c_buffer(b"abcdef") |
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| 69 | n/a | r = strchr(buf, b"c") |
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| 70 | n/a | x = r[0], r[1], r[2], r[3], r[4] |
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| 71 | n/a | self.assertEqual(x, (b"c", b"d", b"e", b"f", b"\000")) |
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| 72 | n/a | del buf |
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| 73 | n/a | # x1 will NOT be the same as x, usually: |
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| 74 | n/a | x1 = r[0], r[1], r[2], r[3], r[4] |
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| 75 | n/a | |
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| 76 | n/a | if __name__ == '__main__': |
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| 77 | n/a | unittest.main() |
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