def test_is_array_of_basic_instance(self):
valids = [arra1(), arra5(), arra6()]
invalids = [v for v in self.tests if v not in valids]
# we need instances to be invalid
invalids.extend([arra2(), arra3(), arra4(), ])
for var in valids:
self.assertTrue(ctypes.is_array_of_basic_instance(var), var)
for var in invalids:
self.assertFalse(ctypes.is_array_of_basic_instance(var), var)
return
def array2bytes(array):
"""Converts an array of undetermined Basic Ctypes class to a byte string,
by guessing it's type from it's class name.
This is a bad example of introspection.
"""
import ctypes
if isinstance(array, str):
# special case for c_char[]
return array
if ctypes.is_array_of_basic_instance(array):
sb = b''.join([pack(array._type_._type_, el) for el in array])
return sb
else:
c_size = ctypes.sizeof(array)
a2 = (ctypes.c_ubyte * c_size).from_address(ctypes.addressof(array))
sb = b''.join([pack('B', el) for el in a2])
return sb
def ctypes_to_python_array(array):
"""Converts an array of undetermined Basic Ctypes class to a python array,
by guessing it's type from it's class name.
This is a bad example of introspection.
"""
import ctypes
if isinstance(array, str):
# special case for c_char[]
return array
if not ctypes.is_array_of_basic_instance(array):
raise TypeError('NOT-AN-Basic-Type-ARRAY')
if array._type_ in [ctypes.c_int, ctypes.c_uint, ctypes.c_long,
ctypes.c_ulong, ctypes.c_ubyte, ctypes.c_byte]:
return [long(el) for el in array]
if array._type_ in [ctypes.c_float, ctypes.c_double, ctypes.c_longdouble]:
return [float(el) for el in array]
sb = ''.join([pack(array._type_._type_, el) for el in array])
return sb
