def test_shifted_annotation() -> None: class Child1(Struct): field1_1: UInt16 field1_2: UInt8 field1_3: UInt8 class Child2(Struct): field2_1: UInt8 field2_2: UInt16 field2_3: UInt8 class Data(Union): child1: Child1 child2: Annotated[Child2, Shift(1)] child3: Annotated[UInt16, Shift(1)] assert sizeof(Data) == 5 assert offsetof(Data, 'child1') == 0 assert offsetof(Data, 'child2') == 1 assert offsetof(Data, 'child3') == 1 data = Data(0) child1 = data.child1 data.child2.field2_1 = 0x12 assert child1.field1_1 == 0x1200 assert data.child3 == 0x12 assert bytes(data) == b'\x00\x12\x00\x00\x00' child1.field1_2 = 0x34 assert child1.field1_2 == 0x34 assert data.child3 == 0x3412 assert bytes(data) == b'\x00\x12\x34\x00\x00'
def test_offsetof_type() -> None: class SomeStruct(Struct): field1: UInt8 field2: UInt16 field3: UInt16 assert offsetof(SomeStruct, 'field1') == 0 assert offsetof(SomeStruct, 'field2') == 1 assert offsetof(SomeStruct, 'field3') == 3 with raises(KeyError): offsetof(SomeStruct, 'bad_field')
def test_offsetof_value() -> None: class SomeStruct(Struct): field1: UInt8 field2: UInt16 field3: UInt16 data = SomeStruct(0) assert offsetof(data, 'field1') == 0 assert offsetof(data, 'field2') == 1 assert offsetof(data, 'field3') == 3 with raises(KeyError): offsetof(data, 'bad_field')
def test_offsetof_type() -> None: some_t = create_struct('SomeStruct', { 'field1': UInt8, 'field2': UInt16, 'field3': UInt16, }) assert offsetof(some_t, 'field1') == 0 assert offsetof(some_t, 'field2') == 1 assert offsetof(some_t, 'field3') == 3 with raises(KeyError): offsetof(some_t, 'bad_field')
def test_struct_modified_member_classvar() -> None: class SomeStruct(Struct): field1 = shifted(Array(UInt16, 3), 1) field2 = padded(Array(UInt8, 3), 2) assert sizeof(SomeStruct) == 12 assert sizeof(SomeStruct.field1) == 6 assert sizeof(SomeStruct.field2) == 3 assert offsetof(SomeStruct, 'field1') == 1 assert offsetof(SomeStruct, 'field2') == 7 data = SomeStruct(((0x1122, 0x3344, 0x5566), (0x77, 0x88, 0x99))) assert bytes(data) == b'\x00\x22\x11\x44\x33\x66\x55\x77\x88\x99\x00\x00'
def test_struct_modified_member_dynamic() -> None: struct_t = create_struct( 'SomeStruct', { 'field1': shifted(Array(UInt16, 3), 1), 'field2': padded(Array(UInt8, 3), 2), }) assert sizeof(struct_t) == 12 assert sizeof(struct_t['field1']) == 6 assert sizeof(struct_t['field2']) == 3 assert offsetof(struct_t, 'field1') == 1 assert offsetof(struct_t, 'field2') == 7 data = struct_t(((0x1122, 0x3344, 0x5566), (0x77, 0x88, 0x99))) assert bytes(data) == b'\x00\x22\x11\x44\x33\x66\x55\x77\x88\x99\x00\x00'
def test_padded_classvar() -> None: class SomeStruct(Struct): field1 = padded(UInt8, 2) field2 = UInt16() field3 = padded(UInt16, 3) assert sizeof(SomeStruct) == 10 assert sizeof(SomeStruct.field1) == 1 assert sizeof(SomeStruct.field2) == 2 assert sizeof(SomeStruct.field3) == 2 assert offsetof(SomeStruct, 'field1') == 0 assert offsetof(SomeStruct, 'field2') == 3 assert offsetof(SomeStruct, 'field3') == 5 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x12\x00\x00\x56\x34\x9a\x78\x00\x00\x00'
def test_padded_annotation() -> None: class SomeStruct(Struct): field1: Annotated[UInt8, Padding(2)] field2: UInt16 field3: Annotated[UInt16, Padding(3)] assert sizeof(SomeStruct) == 10 assert sizeof(SomeStruct.field1) == 1 assert sizeof(SomeStruct.field2) == 2 assert sizeof(SomeStruct.field3) == 2 assert offsetof(SomeStruct, 'field1') == 0 assert offsetof(SomeStruct, 'field2') == 3 assert offsetof(SomeStruct, 'field3') == 5 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x12\x00\x00\x56\x34\x9a\x78\x00\x00\x00'
def test_shifted_classvar() -> None: class SomeStruct(Struct): field1 = shifted(UInt8, 1) field2 = UInt16() field3 = shifted(UInt16, 3) assert sizeof(SomeStruct) == 9 assert sizeof(SomeStruct.field1) == 1 assert sizeof(SomeStruct.field2) == 2 assert sizeof(SomeStruct.field3) == 2 assert offsetof(SomeStruct, 'field1') == 1 assert offsetof(SomeStruct, 'field2') == 2 assert offsetof(SomeStruct, 'field3') == 7 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x12\x56\x34\x00\x00\x00\x9a\x78'
def test_shifted_annotation() -> None: class SomeStruct(Struct): field1: Annotated[UInt8, Shift(1)] field2: UInt16 field3: Annotated[UInt16, Shift(3)] assert sizeof(SomeStruct) == 9 assert sizeof(SomeStruct.field1) == 1 assert sizeof(SomeStruct.field2) == 2 assert sizeof(SomeStruct.field3) == 2 assert offsetof(SomeStruct, 'field1') == 1 assert offsetof(SomeStruct, 'field2') == 2 assert offsetof(SomeStruct, 'field3') == 7 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x12\x56\x34\x00\x00\x00\x9a\x78'
def test_modifiers_annotation() -> None: class SomeStruct(Struct): field1: Annotated[UInt8, Padding(2), Shift(2)] _pad: Padding[Literal[1]] field2: Annotated[UInt16, Shift(1), Padding(1)] field3: UInt16 assert sizeof(SomeStruct) == 12 assert sizeof(SomeStruct.field1) == 1 assert sizeof(SomeStruct.field2) == 2 assert sizeof(SomeStruct.field3) == 2 assert offsetof(SomeStruct, 'field1') == 2 assert offsetof(SomeStruct, 'field2') == 7 assert offsetof(SomeStruct, 'field3') == 10 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x00\x12\x00\x00\x00\x00\x56\x34\x00\x9a\x78'
def test_padding_classvar() -> None: class SomeStruct(Struct): _pad1 = Padding(2) field1 = UInt8() field2 = UInt16() _pad2 = Padding(1) _pad3 = Padding(1) field3 = UInt16() _pad4 = Padding(2) assert sizeof(SomeStruct) == 11 assert offsetof(SomeStruct, 'field1') == 2 assert offsetof(SomeStruct, 'field2') == 3 assert offsetof(SomeStruct, 'field3') == 7 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x00\x12\x56\x34\x00\x00\x9a\x78\x00\x00'
def test_padding_annotation() -> None: class SomeStruct(Struct): _pad1: Padding[Literal[2]] field1: UInt8 field2: UInt16 _pad2: Padding[Literal[1]] _pad3: Padding[Literal[1]] field3: UInt16 _pad4: Padding[Literal[2]] assert sizeof(SomeStruct) == 11 assert offsetof(SomeStruct, 'field1') == 2 assert offsetof(SomeStruct, 'field2') == 3 assert offsetof(SomeStruct, 'field3') == 7 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x00\x12\x56\x34\x00\x00\x9a\x78\x00\x00'
def test_modifiers_classvar() -> None: class SomeStruct(Struct): field1 = padded(shifted(UInt8, 2), 2) _pad = Padding(1) field2 = shifted(padded(UInt16, 1), 1) field3 = UInt16() assert sizeof(SomeStruct) == 12 assert sizeof(SomeStruct.field1) == 1 assert sizeof(SomeStruct.field2) == 2 assert sizeof(SomeStruct.field3) == 2 assert offsetof(SomeStruct, 'field1') == 2 assert offsetof(SomeStruct, 'field2') == 7 assert offsetof(SomeStruct, 'field3') == 10 data = SomeStruct((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x00\x12\x00\x00\x00\x00\x56\x34\x00\x9a\x78'
def test_padded() -> None: struct_t = create_struct( 'SomeStruct', { 'field1': padded(UInt8, 2), 'field2': UInt16, 'field3': padded(UInt16, 3), }) assert sizeof(struct_t) == 10 assert sizeof(struct_t['field1']) == 1 assert sizeof(struct_t['field2']) == 2 assert sizeof(struct_t['field3']) == 2 assert offsetof(struct_t, 'field1') == 0 assert offsetof(struct_t, 'field2') == 3 assert offsetof(struct_t, 'field3') == 5 data = struct_t((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x12\x00\x00\x56\x34\x9a\x78\x00\x00\x00'
def test_modifiers_classvar() -> None: struct_t = create_struct( 'SomeStruct', { 'field1': padded(shifted(UInt8, 2), 2), '_pad': Padding(1), 'field2': shifted(UInt16, 2), 'field3': UInt16(), }) assert sizeof(struct_t) == 12 assert sizeof(struct_t['field1']) == 1 assert sizeof(struct_t['field2']) == 2 assert sizeof(struct_t['field3']) == 2 assert offsetof(struct_t, 'field1') == 2 assert offsetof(struct_t, 'field2') == 8 assert offsetof(struct_t, 'field3') == 10 data = struct_t((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x00\x12\x00\x00\x00\x00\x00\x56\x34\x9a\x78'
def test_padding() -> None: struct_t = create_struct( 'SomeStruct', { '_pad1': Padding(2), 'field1': UInt8, 'field2': UInt16, '_pad2': Padding(1), '_pad3': Padding(1), 'field3': UInt16, '_pad4': Padding(2), }) assert sizeof(struct_t) == 11 assert offsetof(struct_t, 'field1') == 2 assert offsetof(struct_t, 'field2') == 3 assert offsetof(struct_t, 'field3') == 7 data = struct_t((0x12, 0x3456, 0x789a)) assert bytes(data) == b'\x00\x00\x12\x56\x34\x00\x00\x9a\x78\x00\x00'
def test_shifted() -> None: child1_t = create_struct('Child1', { 'field1_1': UInt16, 'field1_2': UInt8, 'field1_3': UInt8, }) child2_t = create_struct('Child2', { 'field2_1': UInt8, 'field2_2': UInt16, 'field2_3': UInt8, }) data_t = create_union( 'Data', { 'child1': child1_t, 'child2': shifted(child2_t, 1), 'child3': shifted(UInt16, 1), }) assert sizeof(data_t) == 5 assert offsetof(data_t, 'child1') == 0 assert offsetof(data_t, 'child2') == 1 assert offsetof(data_t, 'child3') == 1 data: Any = data_t(0) child1 = data['child1'] data['child2']['field2_1'] = 0x12 assert child1['field1_1'] == 0x1200 assert data['child3'] == 0x12 assert bytes(data) == b'\x00\x12\x00\x00\x00' child1['field1_2'] = 0x34 assert data['child2']['field2_2'] == 0x34 assert data['child3'] == 0x3412 assert bytes(data) == b'\x00\x12\x34\x00\x00' child1['field1_1'] = 0x5678 assert data['child2']['field2_1'] == 0x56 assert data['child3'] == 0x3456 assert bytes(data) == b'\x78\x56\x34\x00\x00'
def test_clone() -> None: class Data(Union): u16: UInt16 u8: UInt8 clone = clone_type(Data) data = clone(0) assert clone is not Data assert sizeof(clone) == 2 assert type_name(clone) == 'Data' assert tuple(i for i in clone) == ('u16', 'u8') assert offsetof(clone, 'u16') == 0 assert 'u32' not in clone assert bytes(data) == b'\x00\x00'
def test_shifted_classvar() -> None: class Child1(Struct): field1_1 = UInt16() field1_2 = UInt8() field1_3 = UInt8() class Child2(Struct): field2_1 = UInt8() field2_2 = UInt16() field2_3 = UInt8() class Data(Union): child1 = Child1() child2 = shifted(Child2, 1) child3 = shifted(UInt16, 1) assert sizeof(Data) == 5 assert offsetof(Data, 'child1') == 0 assert offsetof(Data, 'child2') == 1 assert offsetof(Data, 'child3') == 1 data = Data(0) child1 = data.child1 data.child2.field2_1 = 0x12 assert child1.field1_1 == 0x1200 assert data.child3 == 0x12 assert bytes(data) == b'\x00\x12\x00\x00\x00' child1.field1_2 = 0x34 assert data.child2.field2_2 == 0x34 assert data.child3 == 0x3412 assert bytes(data) == b'\x00\x12\x34\x00\x00' child1.field1_1 = 0x5678 assert data.child2.field2_1 == 0x56 assert data.child3 == 0x3456 assert bytes(data) == b'\x78\x56\x34\x00\x00'
def test_clone() -> None: class SomeStruct(Struct): field1: UInt8 field2: UInt16 field3: UInt16 clone = clone_type(SomeStruct) data = clone(0) assert clone is not SomeStruct assert sizeof(clone) == 5 assert type_name(clone) == 'SomeStruct' assert tuple(i for i in clone) == ('field1', 'field2', 'field3') assert offsetof(clone, 'field3') == 3 assert 'field4' not in clone assert bytes(data) == b'\x00\x00\x00\x00\x00'
def test_offsetof_bad() -> None: with raises(TypeError): _ = offsetof('Invalid value', 'bad_field') # type: ignore