import unittest

from ctypes import *

import _ctypes_test



dll = CDLL(_ctypes_test.__file__)



try:

    CALLBACK_FUNCTYPE = WINFUNCTYPE

except NameError:

    # fake to enable this test on Linux

    CALLBACK_FUNCTYPE = CFUNCTYPE



class POINT(Structure):

    _fields_ = [("x", c_int), ("y", c_int)]



class BasicWrapTestCase(unittest.TestCase):

    def wrap(self, param):

        return param



    def test_wchar_parm(self):

        try:

            c_wchar

        except NameError:

            return

        f = dll._testfunc_i_bhilfd

        f.argtypes = [c_byte, c_wchar, c_int, c_long, c_float, c_double]

        result = f(self.wrap(1), self.wrap(u"x"), self.wrap(3), self.wrap(4), self.wrap(5.0), self.wrap(6.0))

        self.failUnlessEqual(result, 139)

        self.failUnless(type(result), int)



    def test_pointers(self):

        f = dll._testfunc_p_p

        f.restype = POINTER(c_int)

        f.argtypes = [POINTER(c_int)]



        # This only works if the value c_int(42) passed to the

        # function is still alive while the pointer (the result) is

        # used.



        v = c_int(42)



        self.failUnlessEqual(pointer(v).contents.value, 42)

        result = f(self.wrap(pointer(v)))

        self.failUnlessEqual(type(result), POINTER(c_int))

        self.failUnlessEqual(result.contents.value, 42)



        # This on works...

        result = f(self.wrap(pointer(v)))

        self.failUnlessEqual(result.contents.value, v.value)



        p = pointer(c_int(99))

        result = f(self.wrap(p))

        self.failUnlessEqual(result.contents.value, 99)



    def test_shorts(self):

        f = dll._testfunc_callback_i_if



        args = []

        expected = [262144, 131072, 65536, 32768, 16384, 8192, 4096, 2048,

                    1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1]



        def callback(v):

            args.append(v)

            return v



        CallBack = CFUNCTYPE(c_int, c_int)



        cb = CallBack(callback)

        f(self.wrap(2**18), self.wrap(cb))

        self.failUnlessEqual(args, expected)



    ################################################################



    def test_callbacks(self):

        f = dll._testfunc_callback_i_if

        f.restype = c_int



        MyCallback = CFUNCTYPE(c_int, c_int)



        def callback(value):

            #print "called back with", value

            return value



        cb = MyCallback(callback)



        result = f(self.wrap(-10), self.wrap(cb))

        self.failUnlessEqual(result, -18)



        # test with prototype

        f.argtypes = [c_int, MyCallback]

        cb = MyCallback(callback)



        result = f(self.wrap(-10), self.wrap(cb))

        self.failUnlessEqual(result, -18)



        result = f(self.wrap(-10), self.wrap(cb))

        self.failUnlessEqual(result, -18)



        AnotherCallback = CALLBACK_FUNCTYPE(c_int, c_int, c_int, c_int, c_int)



        # check that the prototype works: we call f with wrong

        # argument types

        cb = AnotherCallback(callback)

        self.assertRaises(ArgumentError, f, self.wrap(-10), self.wrap(cb))



    def test_callbacks_2(self):

        # Can also use simple datatypes as argument type specifiers

        # for the callback function.

        # In this case the call receives an instance of that type

        f = dll._testfunc_callback_i_if

        f.restype = c_int



        MyCallback = CFUNCTYPE(c_int, c_int)



        f.argtypes = [c_int, MyCallback]



        def callback(value):

            #print "called back with", value

            self.failUnlessEqual(type(value), int)

            return value



        cb = MyCallback(callback)

        result = f(self.wrap(-10), self.wrap(cb))

        self.failUnlessEqual(result, -18)



    def test_longlong_callbacks(self):



        f = dll._testfunc_callback_q_qf

        f.restype = c_longlong



        MyCallback = CFUNCTYPE(c_longlong, c_longlong)



        f.argtypes = [c_longlong, MyCallback]



        def callback(value):

            self.failUnless(isinstance(value, (int, long)))

            return value & 0x7FFFFFFF



        cb = MyCallback(callback)



        self.failUnlessEqual(13577625587, int(f(self.wrap(1000000000000), self.wrap(cb))))



    def test_byval(self):

        # without prototype

        ptin = POINT(1, 2)

        ptout = POINT()

        # EXPORT int _testfunc_byval(point in, point *pout)

        result = dll._testfunc_byval(ptin, byref(ptout))

        got = result, ptout.x, ptout.y

        expected = 3, 1, 2

        self.failUnlessEqual(got, expected)



        # with prototype

        ptin = POINT(101, 102)

        ptout = POINT()

        dll._testfunc_byval.argtypes = (POINT, POINTER(POINT))

        dll._testfunc_byval.restype = c_int

        result = dll._testfunc_byval(self.wrap(ptin), byref(ptout))

        got = result, ptout.x, ptout.y

        expected = 203, 101, 102

        self.failUnlessEqual(got, expected)



    def test_struct_return_2H(self):

        class S2H(Structure):

            _fields_ = [("x", c_short),

                        ("y", c_short)]

        dll.ret_2h_func.restype = S2H

        dll.ret_2h_func.argtypes = [S2H]

        inp = S2H(99, 88)

        s2h = dll.ret_2h_func(self.wrap(inp))

        self.failUnlessEqual((s2h.x, s2h.y), (99*2, 88*3))



    def test_struct_return_8H(self):

        class S8I(Structure):

            _fields_ = [("a", c_int),

                        ("b", c_int),

                        ("c", c_int),

                        ("d", c_int),

                        ("e", c_int),

                        ("f", c_int),

                        ("g", c_int),

                        ("h", c_int)]

        dll.ret_8i_func.restype = S8I

        dll.ret_8i_func.argtypes = [S8I]

        inp = S8I(9, 8, 7, 6, 5, 4, 3, 2)

        s8i = dll.ret_8i_func(self.wrap(inp))

        self.failUnlessEqual((s8i.a, s8i.b, s8i.c, s8i.d, s8i.e, s8i.f, s8i.g, s8i.h),

                             (9*2, 8*3, 7*4, 6*5, 5*6, 4*7, 3*8, 2*9))



#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



class AsParamWrapper(object):

    def __init__(self, param):

        self._as_parameter_ = param



class AsParamWrapperTestCase(BasicWrapTestCase):

    wrap = AsParamWrapper



#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



class AsParamPropertyWrapper(object):

    def __init__(self, param):

        self._param = param



    def getParameter(self):

        return self._param

    _as_parameter_ = property(getParameter)



class AsParamPropertyWrapperTestCase(BasicWrapTestCase):

    wrap = AsParamPropertyWrapper



#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



if __name__ == '__main__':

    unittest.main()

