Copy ctypes-0.9.9.4 Python modules from external into the trunk.

1 files changed, 184 insertions, 0 deletions

diff --git a/Lib/ctypes/test/test_prototypes.py b/Lib/ctypes/test/test_prototypes.py
new file mode 100644
index 0000000000..ffb113bd76
--- /dev/null
+++ b/Lib/ctypes/test/test_prototypes.py
@@ -0,0 +1,184 @@
+from ctypes import *
+import unittest
+
+# IMPORTANT INFO:
+#
+# Consider this call:
+#    func.restype = c_char_p
+#    func(c_char_p("123"))
+# It returns
+#    "123"
+#
+# WHY IS THIS SO?
+#
+# argument tuple (c_char_p("123"), ) is destroyed after the function
+# func is called, but NOT before the result is actually built.
+#
+# If the arglist would be destroyed BEFORE the result has been built,
+# the c_char_p("123") object would already have a zero refcount,
+# and the pointer passed to (and returned by) the function would
+# probably point to deallocated space.
+#
+# In this case, there would have to be an additional reference to the argument...
+
+import _ctypes_test
+testdll = cdll.load(_ctypes_test.__file__)
+
+def c_wbuffer(init):
+    n = len(init) + 1
+    return (c_wchar * n)(*init)
+
+class CharPointersTestCase(unittest.TestCase):
+
+    def setUp(self):
+        func = testdll._testfunc_p_p
+        func.restype = c_long
+        func.argtypes = None
+
+    def test_int_pointer_arg(self):
+        func = testdll._testfunc_p_p
+        func.restype = c_long
+        self.failUnlessEqual(0, func(0))
+
+        ci = c_int(0)
+
+        func.argtypes = POINTER(c_int),
+        self.failUnlessEqual(addressof(ci), func(byref(ci)))
+        
+        func.argtypes = c_char_p,
+        self.assertRaises(ArgumentError, func, byref(ci))
+
+        func.argtypes = POINTER(c_short),
+        self.assertRaises(ArgumentError, func, byref(ci))
+
+        func.argtypes = POINTER(c_double),
+        self.assertRaises(ArgumentError, func, byref(ci))
+
+    def test_POINTER_c_char_arg(self):
+        func = testdll._testfunc_p_p
+        func.restype = c_char_p
+        func.argtypes = POINTER(c_char),
+
+        self.failUnlessEqual(None, func(None))
+        self.failUnlessEqual("123", func("123"))
+        self.failUnlessEqual(None, func(c_char_p(None)))
+        self.failUnlessEqual("123", func(c_char_p("123")))
+
+        self.failUnlessEqual("123", func(c_buffer("123")))
+        ca = c_char("a")
+        self.failUnlessEqual("a", func(pointer(ca))[0])
+        self.failUnlessEqual("a", func(byref(ca))[0])
+
+    def test_c_char_p_arg(self):
+        func = testdll._testfunc_p_p
+        func.restype = c_char_p
+        func.argtypes = c_char_p,
+        
+        self.failUnlessEqual(None, func(None))
+        self.failUnlessEqual("123", func("123"))
+        self.failUnlessEqual(None, func(c_char_p(None)))
+        self.failUnlessEqual("123", func(c_char_p("123")))
+
+        self.failUnlessEqual("123", func(c_buffer("123")))
+        ca = c_char("a")
+        self.failUnlessEqual("a", func(pointer(ca))[0])
+        self.failUnlessEqual("a", func(byref(ca))[0])
+
+    def test_c_void_p_arg(self):
+        func = testdll._testfunc_p_p
+        func.restype = c_char_p
+        func.argtypes = c_void_p,
+
+        self.failUnlessEqual(None, func(None))
+        self.failUnlessEqual("123", func("123"))
+        self.failUnlessEqual("123", func(c_char_p("123")))
+        self.failUnlessEqual(None, func(c_char_p(None)))
+
+        self.failUnlessEqual("123", func(c_buffer("123")))
+        ca = c_char("a")
+        self.failUnlessEqual("a", func(pointer(ca))[0])
+        self.failUnlessEqual("a", func(byref(ca))[0])
+
+        func(byref(c_int()))
+        func(pointer(c_int()))
+        func((c_int * 3)())
+
+        try:
+            func.restype = c_wchar_p
+        except NameError:
+            pass
+        else:
+            self.failUnlessEqual(None, func(c_wchar_p(None)))
+            self.failUnlessEqual(u"123", func(c_wchar_p(u"123")))
+
+##    def test_instance(self):
+##        func = testdll._testfunc_p_p
+
+##        class X:
+##            _as_parameter_ = 0
+
+##        self.failUnlessEqual(0, func(X()))
+
+try:
+    c_wchar
+except NameError:
+    pass
+else:
+    class WCharPointersTestCase(unittest.TestCase):
+
+        def setUp(self):
+            func = testdll._testfunc_p_p
+            func.restype = c_int
+            func.argtypes = None
+
+
+        def test_POINTER_c_wchar_arg(self):
+            func = testdll._testfunc_p_p
+            func.restype = c_wchar_p
+            func.argtypes = POINTER(c_wchar),
+
+            self.failUnlessEqual(None, func(None))
+            self.failUnlessEqual(u"123", func(u"123"))
+            self.failUnlessEqual(None, func(c_wchar_p(None)))
+            self.failUnlessEqual(u"123", func(c_wchar_p(u"123")))
+
+            self.failUnlessEqual(u"123", func(c_wbuffer(u"123")))
+            ca = c_wchar("a")
+            self.failUnlessEqual(u"a", func(pointer(ca))[0])
+            self.failUnlessEqual(u"a", func(byref(ca))[0])
+
+        def test_c_wchar_p_arg(self):
+            func = testdll._testfunc_p_p
+            func.restype = c_wchar_p
+            func.argtypes = c_wchar_p,
+
+            c_wchar_p.from_param(u"123")
+
+            self.failUnlessEqual(None, func(None))
+            self.failUnlessEqual("123", func(u"123"))
+            self.failUnlessEqual(None, func(c_wchar_p(None)))
+            self.failUnlessEqual("123", func(c_wchar_p("123")))
+
+            # XXX Currently, these raise TypeErrors, although they shouldn't:
+            self.failUnlessEqual("123", func(c_wbuffer("123")))
+            ca = c_wchar("a")
+            self.failUnlessEqual("a", func(pointer(ca))[0])
+            self.failUnlessEqual("a", func(byref(ca))[0])
+
+class ArrayTest(unittest.TestCase):
+    def test(self):
+        func = testdll._testfunc_ai8
+        func.restype = POINTER(c_int)
+        func.argtypes = c_int * 8,
+
+        func((c_int * 8)(1, 2, 3, 4, 5, 6, 7, 8))
+
+        # This did crash before:
+
+        def func(): pass
+        CFUNCTYPE(None, c_int * 3)(func)
+
+################################################################
+
+if __name__ == '__main__':
+    unittest.main()