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import unittest
from ctypes import *
from ctypes.test import need_symbol
import _ctypes_test
class SlicesTestCase(unittest.TestCase):
def test_getslice_cint(self):
a = (c_int * 100)(*range(1100, 1200))
b = list(range(1100, 1200))
self.assertEqual(a[0:2], b[0:2])
self.assertEqual(a[0:2:], b[0:2:])
self.assertEqual(len(a), len(b))
self.assertEqual(a[5:7], b[5:7])
self.assertEqual(a[5:7:], b[5:7:])
self.assertEqual(a[-1], b[-1])
self.assertEqual(a[:], b[:])
self.assertEqual(a[::], b[::])
self.assertEqual(a[10::-1], b[10::-1])
self.assertEqual(a[30:20:-1], b[30:20:-1])
self.assertEqual(a[:12:6], b[:12:6])
self.assertEqual(a[2:6:4], b[2:6:4])
a[0:5] = range(5, 10)
self.assertEqual(a[0:5], list(range(5, 10)))
self.assertEqual(a[0:5:], list(range(5, 10)))
self.assertEqual(a[4::-1], list(range(9, 4, -1)))
def test_setslice_cint(self):
a = (c_int * 100)(*range(1100, 1200))
b = list(range(1100, 1200))
a[32:47] = list(range(32, 47))
self.assertEqual(a[32:47], list(range(32, 47)))
a[32:47] = range(132, 147)
self.assertEqual(a[32:47:], list(range(132, 147)))
a[46:31:-1] = range(232, 247)
self.assertEqual(a[32:47:1], list(range(246, 231, -1)))
a[32:47] = range(1132, 1147)
self.assertEqual(a[:], b)
a[32:47:7] = range(3)
b[32:47:7] = range(3)
self.assertEqual(a[:], b)
a[33::-3] = range(12)
b[33::-3] = range(12)
self.assertEqual(a[:], b)
from operator import setitem
# TypeError: int expected instead of str instance
self.assertRaises(TypeError, setitem, a, slice(0, 5), "abcde")
# TypeError: int expected instead of str instance
self.assertRaises(TypeError, setitem, a, slice(0, 5),
["a", "b", "c", "d", "e"])
# TypeError: int expected instead of float instance
self.assertRaises(TypeError, setitem, a, slice(0, 5),
[1, 2, 3, 4, 3.14])
# ValueError: Can only assign sequence of same size
self.assertRaises(ValueError, setitem, a, slice(0, 5), range(32))
def test_char_ptr(self):
s = b"abcdefghijklmnopqrstuvwxyz"
dll = CDLL(_ctypes_test.__file__)
dll.my_strdup.restype = POINTER(c_char)
dll.my_free.restype = None
res = dll.my_strdup(s)
self.assertEqual(res[:len(s)], s)
self.assertEqual(res[:3], s[:3])
self.assertEqual(res[:len(s):], s)
self.assertEqual(res[len(s)-1:-1:-1], s[::-1])
self.assertEqual(res[len(s)-1:5:-7], s[:5:-7])
self.assertEqual(res[0:-1:-1], s[0::-1])
import operator
self.assertRaises(ValueError, operator.getitem,
res, slice(None, None, None))
self.assertRaises(ValueError, operator.getitem,
res, slice(0, None, None))
self.assertRaises(ValueError, operator.getitem,
res, slice(None, 5, -1))
self.assertRaises(ValueError, operator.getitem,
res, slice(-5, None, None))
self.assertRaises(TypeError, operator.setitem,
res, slice(0, 5), "abcde")
dll.my_free(res)
dll.my_strdup.restype = POINTER(c_byte)
res = dll.my_strdup(s)
self.assertEqual(res[:len(s)], list(range(ord("a"), ord("z")+1)))
self.assertEqual(res[:len(s):], list(range(ord("a"), ord("z")+1)))
dll.my_free(res)
def test_char_ptr_with_free(self):
dll = CDLL(_ctypes_test.__file__)
s = b"abcdefghijklmnopqrstuvwxyz"
class allocated_c_char_p(c_char_p):
pass
dll.my_free.restype = None
def errcheck(result, func, args):
retval = result.value
dll.my_free(result)
return retval
dll.my_strdup.restype = allocated_c_char_p
dll.my_strdup.errcheck = errcheck
try:
res = dll.my_strdup(s)
self.assertEqual(res, s)
finally:
del dll.my_strdup.errcheck
def test_char_array(self):
s = b"abcdefghijklmnopqrstuvwxyz\0"
p = (c_char * 27)(*s)
self.assertEqual(p[:], s)
self.assertEqual(p[::], s)
self.assertEqual(p[::-1], s[::-1])
self.assertEqual(p[5::-2], s[5::-2])
self.assertEqual(p[2:5:-3], s[2:5:-3])
@need_symbol('c_wchar')
def test_wchar_ptr(self):
s = "abcdefghijklmnopqrstuvwxyz\0"
dll = CDLL(_ctypes_test.__file__)
dll.my_wcsdup.restype = POINTER(c_wchar)
dll.my_wcsdup.argtypes = POINTER(c_wchar),
dll.my_free.restype = None
res = dll.my_wcsdup(s)
self.assertEqual(res[:len(s)], s)
self.assertEqual(res[:len(s):], s)
self.assertEqual(res[len(s)-1:-1:-1], s[::-1])
self.assertEqual(res[len(s)-1:5:-7], s[:5:-7])
import operator
self.assertRaises(TypeError, operator.setitem,
res, slice(0, 5), "abcde")
dll.my_free(res)
if sizeof(c_wchar) == sizeof(c_short):
dll.my_wcsdup.restype = POINTER(c_short)
elif sizeof(c_wchar) == sizeof(c_int):
dll.my_wcsdup.restype = POINTER(c_int)
elif sizeof(c_wchar) == sizeof(c_long):
dll.my_wcsdup.restype = POINTER(c_long)
else:
self.skipTest('Pointers to c_wchar are not supported')
res = dll.my_wcsdup(s)
tmpl = list(range(ord("a"), ord("z")+1))
self.assertEqual(res[:len(s)-1], tmpl)
self.assertEqual(res[:len(s)-1:], tmpl)
self.assertEqual(res[len(s)-2:-1:-1], tmpl[::-1])
self.assertEqual(res[len(s)-2:5:-7], tmpl[:5:-7])
dll.my_free(res)
################################################################
if __name__ == "__main__":
unittest.main()
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