def test_sub_onCPointerOfDifferrentType_raisesTypeError(self):
cptr_type1 = cdm.CPointerType(
cdm.CIntType('name1', 32, True, 'little'), 32, 'little')
cptr_type2 = cdm.CPointerType(
cdm.CIntType('name2', 32, True, 'little'), 32, 'little')
cptr_obj1 = cdm.CPointer(cptr_type1, 0)
cptr_obj2 = cdm.CPointer(cptr_type2, 0)
with pytest.raises(TypeError):
_ = cptr_obj2 - cptr_obj1
def cptr_to_array_of(self, val_list):
addrspace = VirtualAddressSpace(b'some-data')
cptr_type = cdm.CPointerType(
cdm.CIntType('i32', 32, False, 'little', addrspace), 32, 'little',
addrspace)
adr = addrspace.alloc_memory(len(val_list) * 4)
addrspace.write_memory(
adr, b''.join(v.to_bytes(4, 'little') for v in val_list))
yield cptr_type(adr)
content = addrspace.read_memory(adr, len(val_list) * 4)
for ndx in range(len(val_list)):
val_list[ndx] = int.from_bytes(content[ndx * 4:ndx * 4 + 4],
'little')
def test_eq_onSamePointer_returnsTrue(self, cint_type):
assert cdm.CPointerType(cint_type, 32, 'little') \
== cdm.CPointerType(cint_type, 32, 'little')
def cptr_type(cint_type, addrspace):
return cdm.CPointerType(cint_type, 32, 'big', addrspace)
def test_convertToCRepr_onInt_returnsCRepr(self, bitsize, endianess,
expected_val, cint_type,
addrspace):
cptr_type = cdm.CPointerType(cint_type, bitsize, endianess, addrspace)
assert cptr_type.convert_to_c_repr(0x87654321) == expected_val
def test_repr_returnsBaseNamePlusPtr(self, unbound_cint_type):
cptr_type = cdm.CPointerType(unbound_cint_type, 32,
'little').with_attr('attr')
assert repr(cptr_type) == 'ts.cint_attr_ptr'
def test_eq_onDifferentPointer_returnsFalse(self, diff_cptr_type):
basetype = cdm.CIntType('base', 32, True, 'little')
assert cdm.CPointerType(basetype, 32, 'little') != diff_cptr_type
def test_bind_bindsAlsoBaseType(self, addrspace, unbound_cint_type):
cptr_type = cdm.CPointerType(unbound_cint_type, 32, 'little')
bound_cptr_type = cptr_type.bind(addrspace)
assert bound_cptr_type.base_type.__addrspace__ is not None
def test_init_onBaseTypeWithDifferentAddrSpaceSet_raisesInvalidAddressSpaceError(
self, cint_type):
with pytest.raises(cdm.InvalidAddressSpaceError):
_ = cdm.CPointerType(cint_type, 32, 'little',
VirtualAddressSpace())
def test_init_onPtrType_returnsInitializedPointerObj(
self, unbound_cint_type, addrspace, endianess, wordsize):
cptr_type = cdm.CPointerType(unbound_cint_type, wordsize, endianess)
assert cptr_type.base_type is unbound_cint_type
assert cptr_type.sizeof == wordsize // 8
assert cptr_type.endianess == endianess
class TestCPointerType:
@pytest.mark.parametrize(('endianess', 'wordsize'), [('little', 32),
('little', 64),
('big', 32)])
def test_init_onPtrType_returnsInitializedPointerObj(
self, unbound_cint_type, addrspace, endianess, wordsize):
cptr_type = cdm.CPointerType(unbound_cint_type, wordsize, endianess)
assert cptr_type.base_type is unbound_cint_type
assert cptr_type.sizeof == wordsize // 8
assert cptr_type.endianess == endianess
def test_init_onBaseTypeWithDifferentAddrSpaceSet_raisesInvalidAddressSpaceError(
self, cint_type):
with pytest.raises(cdm.InvalidAddressSpaceError):
_ = cdm.CPointerType(cint_type, 32, 'little',
VirtualAddressSpace())
def test_bind_bindsAlsoBaseType(self, addrspace, unbound_cint_type):
cptr_type = cdm.CPointerType(unbound_cint_type, 32, 'little')
bound_cptr_type = cptr_type.bind(addrspace)
assert bound_cptr_type.base_type.__addrspace__ is not None
def test_shallowIterSubTypes_onNotEmbeddedDefsOnlyIsFalse_returnsReferredTypeElementaryTypes(
self, cptr_type):
assert list(cptr_type.shallow_iter_subtypes()) \
== [cptr_type.base_type]
def test_eq_onSamePointer_returnsTrue(self, unbound_cint_type):
assert cdm.CPointerType(unbound_cint_type, 32, 'little') \
== cdm.CPointerType(unbound_cint_type, 32, 'little')
@pytest.mark.parametrize('diff_cptr_type', [
cdm.CPointerType(cdm.CIntType('other', 16, True, 'little'), 32,
'little'),
cdm.CPointerType(cdm.CIntType('base', 32, True, 'little'), 64,
'little'),
cdm.CPointerType(cdm.CIntType('base', 32, True, 'little'), 32, 'big')
])
def test_eq_onDifferentPointer_returnsFalse(self, diff_cptr_type):
basetype = cdm.CIntType('base', 32, True, 'little')
assert cdm.CPointerType(basetype, 32, 'little') != diff_cptr_type
def test_nullValue_ok(self, cptr_type):
assert cptr_type.null_val == 0
def test_cDefinition_onNoRefDef_returnsCNameWithoutRefDef(
self, unbound_cint_type):
assert unbound_cint_type.ptr.c_definition() == 'cint *'
def test_cDefinition_onPtrToPtr_returnsTwoStars(self, unbound_cint_type):
assert unbound_cint_type.ptr.ptr.c_definition() == 'cint **'
def test_cDefinition_onPtrToArray_returnsParentethizedStar(
self, unbound_cint_type):
assert unbound_cint_type.array(10).ptr.c_definition() == 'cint (*)[10]'
def test_cDefinition_onArrayOfPtrs_returnsUnParentethizedStar(
self, unbound_cint_type):
assert unbound_cint_type.ptr.array(10).c_definition() == 'cint *[10]'
def test_cDefinition_onRefDef_returnsCNameWithRefDef(
self, unbound_cint_type):
assert unbound_cint_type.ptr.c_definition('ab') == 'cint *ab'
def test_repr_returnsBaseNamePlusPtr(self, unbound_cint_type):
cptr_type = cdm.CPointerType(unbound_cint_type, 32,
'little').with_attr('attr')
assert repr(cptr_type) == 'ts.cint_attr_ptr'
def test_convertFromCRepr_returnsAddressOfReferredObj(self, cptr_type):
assert cptr_type.convert_from_c_repr(b'\x12\x34\x56\x78') == 0x12345678
@pytest.mark.parametrize(('bitsize', 'endianess', 'expected_val'),
[(32, 'little', b'\x21\x43\x65\x87'),
(16, 'little', b'\x21\x43'),
(32, 'big', b'\x87\x65\x43\x21')])
def test_convertToCRepr_onInt_returnsCRepr(self, bitsize, endianess,
expected_val, cint_type,
addrspace):
cptr_type = cdm.CPointerType(cint_type, bitsize, endianess, addrspace)
assert cptr_type.convert_to_c_repr(0x87654321) == expected_val
def test_convertToCRepr_onIterable_allocatesPtrAndCastsIt(
self, cptr_type, addrspace):
init_val = Mock(spec=list)
cptr_type.base_type.alloc_ptr = alloc_ptr = Mock()
alloc_ptr.return_value.val = 0x123
assert cptr_type.convert_to_c_repr(init_val) == b'\x00\x00\x01\x23'
alloc_ptr.assert_called_once_with(init_val)
def test_convertToCRepr_onCArray_setsAddressOfArray(
self, cptr_type, cint_type):
int_arr = cint_type.alloc_array(3)
assert cptr_type.convert_to_c_repr(int_arr) \
== int_arr.__address__.to_bytes(4, 'big')
@pytest.mark.parametrize(('bitsize', 'endianess', 'c_repr', 'py_val'),
[(32, 'little', b'\x78\x56\x34\x12', 0x12345678),
(16, 'little', b'\x34\x12', 0x1234),
(32, 'big', b'\x12\x34\x56\x78', 0x12345678)])
def test_convertFromCRepr_returnsCRepr(self, bitsize, endianess, c_repr,
py_val, cint_type, addrspace):
cptr_type = cdm.CPointerType(cint_type, bitsize, endianess, addrspace)
assert cptr_type.convert_from_c_repr(c_repr) == py_val
@pytest.mark.parametrize('size', [4, 8])
def test_getAlignment_returnsSizeof(self, size, unbound_cint_type):
cptr_type = cdm.CPointerType(unbound_cint_type, size * 8, 'little')
assert cptr_type.alignment == size
def test_getAlignment_returnsSizeof(self, size, unbound_cint_type):
cptr_type = cdm.CPointerType(unbound_cint_type, size * 8, 'little')
assert cptr_type.alignment == size
def test_convertFromCRepr_returnsCRepr(self, bitsize, endianess, c_repr,
py_val, cint_type, addrspace):
cptr_type = cdm.CPointerType(cint_type, bitsize, endianess, addrspace)
assert cptr_type.convert_from_c_repr(c_repr) == py_val