1import unittest
2from ctypes import *
3
4import _ctypes_test
5
6class SlicesTestCase(unittest.TestCase):
7    def test_getslice_cint(self):
8        a = (c_int * 100)(*xrange(1100, 1200))
9        b = range(1100, 1200)
10        self.assertEqual(a[0:2], b[0:2])
11        self.assertEqual(a[0:2:], b[0:2:])
12        self.assertEqual(len(a), len(b))
13        self.assertEqual(a[5:7], b[5:7])
14        self.assertEqual(a[5:7:], b[5:7:])
15        self.assertEqual(a[-1], b[-1])
16        self.assertEqual(a[:], b[:])
17        self.assertEqual(a[::], b[::])
18        self.assertEqual(a[10::-1], b[10::-1])
19        self.assertEqual(a[30:20:-1], b[30:20:-1])
20        self.assertEqual(a[:12:6], b[:12:6])
21        self.assertEqual(a[2:6:4], b[2:6:4])
22
23        a[0:5] = range(5, 10)
24        self.assertEqual(a[0:5], range(5, 10))
25        self.assertEqual(a[0:5:], range(5, 10))
26        self.assertEqual(a[4::-1], range(9, 4, -1))
27
28    def test_setslice_cint(self):
29        a = (c_int * 100)(*xrange(1100, 1200))
30        b = range(1100, 1200)
31
32        a[32:47] = range(32, 47)
33        self.assertEqual(a[32:47], range(32, 47))
34        a[32:47] = range(132, 147)
35        self.assertEqual(a[32:47:], range(132, 147))
36        a[46:31:-1] = range(232, 247)
37        self.assertEqual(a[32:47:1], range(246, 231, -1))
38
39        a[32:47] = range(1132, 1147)
40        self.assertEqual(a[:], b)
41        a[32:47:7] = range(3)
42        b[32:47:7] = range(3)
43        self.assertEqual(a[:], b)
44        a[33::-3] = range(12)
45        b[33::-3] = range(12)
46        self.assertEqual(a[:], b)
47
48        from operator import setslice, setitem
49
50        # TypeError: int expected instead of str instance
51        self.assertRaises(TypeError, setslice, a, 0, 5, "abcde")
52        self.assertRaises(TypeError, setitem, a, slice(0, 5), "abcde")
53        # TypeError: int expected instead of str instance
54        self.assertRaises(TypeError, setslice, a, 0, 5, ["a", "b", "c", "d", "e"])
55        self.assertRaises(TypeError, setitem, a, slice(0, 5),
56                          ["a", "b", "c", "d", "e"])
57        # TypeError: int expected instead of float instance
58        self.assertRaises(TypeError, setslice, a, 0, 5, [1, 2, 3, 4, 3.14])
59        self.assertRaises(TypeError, setitem, a, slice(0, 5),
60                          [1, 2, 3, 4, 3.14])
61        # ValueError: Can only assign sequence of same size
62        self.assertRaises(ValueError, setslice, a, 0, 5, range(32))
63        self.assertRaises(ValueError, setitem, a, slice(0, 5), range(32))
64
65    def test_char_ptr(self):
66        s = "abcdefghijklmnopqrstuvwxyz"
67
68        dll = CDLL(_ctypes_test.__file__)
69        dll.my_strdup.restype = POINTER(c_char)
70        dll.my_free.restype = None
71        res = dll.my_strdup(s)
72        self.assertEqual(res[:len(s)], s)
73        self.assertEqual(res[:3], s[:3])
74        self.assertEqual(res[:len(s):], s)
75        self.assertEqual(res[len(s)-1:-1:-1], s[::-1])
76        self.assertEqual(res[len(s)-1:5:-7], s[:5:-7])
77        self.assertEqual(res[0:-1:-1], s[0::-1])
78
79        import operator
80        self.assertRaises(ValueError, operator.getitem,
81                          res, slice(None, None, None))
82        self.assertRaises(ValueError, operator.getitem,
83                          res, slice(0, None, None))
84        self.assertRaises(ValueError, operator.getitem,
85                          res, slice(None, 5, -1))
86        self.assertRaises(ValueError, operator.getitem,
87                          res, slice(-5, None, None))
88
89        self.assertRaises(TypeError, operator.setslice,
90                          res, 0, 5, u"abcde")
91        self.assertRaises(TypeError, operator.setitem,
92                          res, slice(0, 5), u"abcde")
93        dll.my_free(res)
94
95        dll.my_strdup.restype = POINTER(c_byte)
96        res = dll.my_strdup(s)
97        self.assertEqual(res[:len(s)], range(ord("a"), ord("z")+1))
98        self.assertEqual(res[:len(s):], range(ord("a"), ord("z")+1))
99        dll.my_free(res)
100
101    def test_char_ptr_with_free(self):
102        dll = CDLL(_ctypes_test.__file__)
103        s = "abcdefghijklmnopqrstuvwxyz"
104
105        class allocated_c_char_p(c_char_p):
106            pass
107
108        dll.my_free.restype = None
109        def errcheck(result, func, args):
110            retval = result.value
111            dll.my_free(result)
112            return retval
113
114        dll.my_strdup.restype = allocated_c_char_p
115        dll.my_strdup.errcheck = errcheck
116        try:
117            res = dll.my_strdup(s)
118            self.assertEqual(res, s)
119        finally:
120            del dll.my_strdup.errcheck
121
122
123    def test_char_array(self):
124        s = "abcdefghijklmnopqrstuvwxyz\0"
125
126        p = (c_char * 27)(*s)
127        self.assertEqual(p[:], s)
128        self.assertEqual(p[::], s)
129        self.assertEqual(p[::-1], s[::-1])
130        self.assertEqual(p[5::-2], s[5::-2])
131        self.assertEqual(p[2:5:-3], s[2:5:-3])
132
133
134    try:
135        c_wchar
136    except NameError:
137        pass
138    else:
139        def test_wchar_ptr(self):
140            s = u"abcdefghijklmnopqrstuvwxyz\0"
141
142            dll = CDLL(_ctypes_test.__file__)
143            dll.my_wcsdup.restype = POINTER(c_wchar)
144            dll.my_wcsdup.argtypes = POINTER(c_wchar),
145            dll.my_free.restype = None
146            res = dll.my_wcsdup(s)
147            self.assertEqual(res[:len(s)], s)
148            self.assertEqual(res[:len(s):], s)
149            self.assertEqual(res[len(s)-1:-1:-1], s[::-1])
150            self.assertEqual(res[len(s)-1:5:-7], s[:5:-7])
151
152            import operator
153            self.assertRaises(TypeError, operator.setslice,
154                              res, 0, 5, u"abcde")
155            self.assertRaises(TypeError, operator.setitem,
156                              res, slice(0, 5), u"abcde")
157            dll.my_free(res)
158
159            if sizeof(c_wchar) == sizeof(c_short):
160                dll.my_wcsdup.restype = POINTER(c_short)
161            elif sizeof(c_wchar) == sizeof(c_int):
162                dll.my_wcsdup.restype = POINTER(c_int)
163            elif sizeof(c_wchar) == sizeof(c_long):
164                dll.my_wcsdup.restype = POINTER(c_long)
165            else:
166                return
167            res = dll.my_wcsdup(s)
168            tmpl = range(ord("a"), ord("z")+1)
169            self.assertEqual(res[:len(s)-1], tmpl)
170            self.assertEqual(res[:len(s)-1:], tmpl)
171            self.assertEqual(res[len(s)-2:-1:-1], tmpl[::-1])
172            self.assertEqual(res[len(s)-2:5:-7], tmpl[:5:-7])
173            dll.my_free(res)
174
175################################################################
176
177if __name__ == "__main__":
178    unittest.main()
179