Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 1da43e5e916949c8e849e656d9d05fa4b9d6836c authored by Benjamin Peterson on 26 June 2009, 13:21:52 UTC
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
Tip revision: 1da43e5
test_as_parameter.py
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("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))
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()