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type: add Type.unqualified()

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This commit is contained in:
Omar Sandoval 2018-07-11 21:51:48 -07:00
parent 9b5b721838
commit 6fa2d68c0c
2 changed files with 59 additions and 24 deletions
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39
drgn/type.py
View File

@ -164,12 +164,18 @@ class Type:
"""
return self
def unqualified(self) -> 'Type':
"""
Return this type without qualifiers.
"""
raise NotImplementedError()
def operand_type(self) -> 'Type':
"""
Return the type that this type is converted to when used in an
expression.
"""
raise NotImplementedError()
return self.unqualified()
def is_arithmetic(self) -> bool:
"""
@ -217,7 +223,7 @@ class VoidType(Type):
def convert(self, value: Any) -> None:
return None
def operand_type(self) -> 'VoidType':
def unqualified(self) -> 'VoidType':
if self.qualifiers:
return VoidType()
return self
@ -310,7 +316,7 @@ class IntType(ArithmeticType):
raise TypeError(f'cannot convert to {self}')
return _int_convert(math.trunc(value), 8 * self.size, self.signed)
def operand_type(self) -> 'IntType':
def unqualified(self) -> 'IntType':
if self.qualifiers:
return IntType(self.name, self.size, self.signed)
return self
@ -346,7 +352,7 @@ class BoolType(IntType):
raise TypeError(f'cannot convert to {self}')
return bool(value)
def operand_type(self) -> 'BoolType':
def unqualified(self) -> 'BoolType':
if self.qualifiers:
return BoolType(self.name, self.size)
return self
@ -375,7 +381,7 @@ class FloatType(ArithmeticType):
else:
raise ValueError(f"can't convert to float of size {self.size}")
def operand_type(self) -> 'FloatType':
def unqualified(self) -> 'FloatType':
if self.qualifiers:
return FloatType(self.name, self.size)
return self
@ -457,9 +463,9 @@ class BitFieldType(Type):
raise TypeError(f'cannot convert to {self}')
return _int_convert(math.trunc(value), self.bit_size, self.type.signed)
def operand_type(self) -> 'BitFieldType':
def unqualified(self) -> 'BitFieldType':
if self.type.qualifiers:
return BitFieldType(self.type.operand_type(), self.bit_offset,
return BitFieldType(self.type.unqualified(), self.bit_offset,
self.bit_size)
return self
@ -656,7 +662,7 @@ class StructType(CompoundType):
def type_name(self) -> StructTypeName:
return StructTypeName(self.name, self.qualifiers)
def operand_type(self) -> 'StructType':
def unqualified(self) -> 'StructType':
if self.qualifiers:
return StructType(self.name, self.size, self._members)
return self
@ -684,7 +690,7 @@ class UnionType(CompoundType):
def type_name(self) -> UnionTypeName:
return UnionTypeName(self.name, self.qualifiers)
def operand_type(self) -> 'UnionType':
def unqualified(self) -> 'UnionType':
if self.qualifiers:
return UnionType(self.name, self.size, self._members)
return self
@ -806,7 +812,7 @@ class EnumType(Type):
pass
return value
def operand_type(self) -> 'EnumType':
def unqualified(self) -> 'EnumType':
if self.qualifiers:
return EnumType(self.name, self.type,
None if self.enum is None else self.enum.__members__)
@ -883,6 +889,11 @@ class TypedefType(Type):
type_ = type_.type
return type_
def unqualified(self) -> 'TypedefType':
if self.qualifiers:
return TypedefType(self.name, self.type)
return self
def operand_type(self) -> Type:
type_ = self.type
while isinstance(type_, TypedefType):
@ -957,7 +968,7 @@ class PointerType(Type):
raise TypeError(f'cannot convert to {self}')
return _int_convert(int(value), 8 * self.size, False)
def operand_type(self) -> 'PointerType':
def unqualified(self) -> 'PointerType':
if self.qualifiers:
return PointerType(self.size, self.type)
return self
@ -1041,6 +1052,9 @@ class ArrayType(Type):
parts.append('}')
return ''.join(parts)
def unqualified(self) -> 'ArrayType':
return self
def operand_type(self) -> 'PointerType':
return PointerType(self.pointer_size, self.type)
@ -1103,6 +1117,9 @@ class FunctionType(Type):
def pretty(self, value: Any, cast: bool = True) -> str:
raise ValueError("can't format function")
def unqualified(self) -> 'FunctionType':
return self
def operand_type(self) -> 'PointerType':
return PointerType(self.pointer_size, self)

36
tests/test_type.py
View File

@ -545,29 +545,38 @@ class TestConvert(unittest.TestCase):
self.assertEqual(type_.convert(2**64 + 1), 1)
class TestOperandType(TypeTestCase):
class TestUnqualifiedAndOperandType(TypeTestCase):
def assertUnqualifiedType(self, type_, expected):
for i in range(2):
type_ = type_.unqualified()
self.assertEqual(type_, expected)
def assertOperandType(self, type_, expected):
for i in range(2):
type_ = type_.operand_type()
self.assertEqual(type_, expected)
def assertBoth(self, type_, expected):
self.assertUnqualifiedType(type_, expected)
self.assertOperandType(type_, expected)
def test_void(self):
self.assertOperandType(VoidType(frozenset({'const'})), VoidType())
self.assertBoth(VoidType(frozenset({'const'})), VoidType())
def test_int(self):
self.assertOperandType(IntType('int', 4, True, frozenset({'const'})),
self.assertBoth(IntType('int', 4, True, frozenset({'const'})),
IntType('int', 4, True))
def test_bool(self):
self.assertOperandType(BoolType('_Bool', 1, frozenset({'const'})),
self.assertBoth(BoolType('_Bool', 1, frozenset({'const'})),
BoolType('_Bool', 1))
def test_float(self):
self.assertOperandType(FloatType('double', 8, frozenset({'const'})),
self.assertBoth(FloatType('double', 8, frozenset({'const'})),
FloatType('double', 8))
def test_bit_field(self):
self.assertOperandType(BitFieldType(IntType('int', 4, True, frozenset({'const'})), 0, 4),
self.assertBoth(BitFieldType(IntType('int', 4, True, frozenset({'const'})), 0, 4),
BitFieldType(IntType('int', 4, True), 0, 4))
def test_struct(self):
@ -575,7 +584,7 @@ class TestOperandType(TypeTestCase):
('x', 0, lambda: IntType('int', 4, True)),
('y', 4, lambda: IntType('int', 4, True)),
], frozenset({'const'}))
self.assertOperandType(const_point_type, point_type)
self.assertBoth(const_point_type, point_type)
def test_union(self):
union_type = UnionType('value', 4, [
@ -586,7 +595,7 @@ class TestOperandType(TypeTestCase):
('i', 0, lambda: IntType('int', 4, True)),
('f', 0, lambda: FloatType('float', 4)),
], frozenset({'const'}))
self.assertOperandType(const_union_type, union_type)
self.assertBoth(const_union_type, union_type)
def test_enum(self):
enum_type = EnumType(None, IntType('int', 4, True), [
@ -599,7 +608,7 @@ class TestOperandType(TypeTestCase):
('GREEN', 11),
('BLUE', -1)
], frozenset({'const'}))
self.assertOperandType(const_enum_type, enum_type)
self.assertBoth(const_enum_type, enum_type)
def test_typedef(self):
const_typedef_type = TypedefType(
@ -610,9 +619,14 @@ class TestOperandType(TypeTestCase):
frozenset({'const'}))
typedef_type = TypedefType('u32', IntType('unsigned int', 4, False))
self.assertUnqualifiedType(const_typedef_type, typedef_type)
self.assertOperandType(const_typedef_type, typedef_type)
self.assertUnqualifiedType(typedef_const_type, typedef_const_type)
self.assertOperandType(typedef_const_type,
IntType('unsigned int', 4, False))
self.assertUnqualifiedType(const_typedef_const_type, typedef_const_type)
self.assertOperandType(const_typedef_const_type,
IntType('unsigned int', 4, False))
@ -630,16 +644,20 @@ class TestOperandType(TypeTestCase):
def test_array(self):
type_ = ArrayType(IntType('int', 4, True), 2, pointer_size)
self.assertUnqualifiedType(type_, type_)
self.assertOperandType(type_, PointerType(pointer_size, type_.type))
typedef_type = TypedefType('pair_t', type_)
self.assertUnqualifiedType(typedef_type, typedef_type)
self.assertOperandType(typedef_type, PointerType(pointer_size, type_.type))
def test_function(self):
type_ = FunctionType(pointer_size, VoidType, [])
self.assertUnqualifiedType(type_, type_)
self.assertOperandType(type_, PointerType(pointer_size, type_))
typedef_type = TypedefType('callback_t', type_)
self.assertUnqualifiedType(typedef_type, typedef_type)
self.assertOperandType(typedef_type, PointerType(pointer_size, type_))