def _update_layout_with_field_attributes(self, layout, attributes):
"""A method that modifies a given layout with the given field attributes.
Args:
layout: an object representing a layout.
attributes: a list of objects representing field attributes.
"""
attributes_alignment = self._compound_type_bit_alignment()
for attribute in attributes:
if string_util.attribute_name_match(attribute.name, 'packed'):
layout.bit_alignment = self._compound_type_bit_alignment()
elif string_util.attribute_name_match(attribute.name, 'aligned'):
byte_alignment = self._expression_evaluator.evaluate(
expression=attribute.parameters[0],
)
attributes_alignment = self._lcm(
attributes_alignment,
8 * byte_alignment,
)
layout.bit_alignment = self._lcm(
layout.bit_alignment,
attributes_alignment,
)
def _get_attributes_alignment(self, attributes):
bit_alignment = self._base_alignment()
for attribute in attributes:
if string_util.attribute_name_match(attribute.name, 'aligned'):
expression = attribute.parameters[0]
byte_alignment = self._expression_evaluator.evaluate(expression)
bit_alignment = self._lcm(bit_alignment, 8 * byte_alignment)
return bit_alignment
def visit_c_typedef(self, typedef):
layout = typedef.type_definition.accept(self)
for attribute in typedef.attributes:
if string_util.attribute_name_match(attribute.name, 'aligned'):
expression = attribute.parameters[0]
byte_alignment = self._expression_evaluator.evaluate(expression)
layout.bit_alignment = 8 * byte_alignment
return layout
def _get_attributes_alignment(self, attributes):
bit_alignment = self._base_alignment()
for attribute in attributes:
if string_util.attribute_name_match(attribute.name, 'aligned'):
expression = attribute.parameters[0]
byte_alignment = self._expression_evaluator.evaluate(
expression)
bit_alignment = self._lcm(bit_alignment, 8 * byte_alignment)
return bit_alignment
def visit_c_typedef(self, typedef):
layout = typedef.type_definition.accept(self)
for attribute in typedef.attributes:
if string_util.attribute_name_match(attribute.name, 'aligned'):
expression = attribute.parameters[0]
byte_alignment = self._expression_evaluator.evaluate(
expression)
layout.bit_alignment = 8 * byte_alignment
return layout
def test_with_variants_of_the_same_name(self):
variants = (
'some_name',
'__some_name',
'some_name__',
'__some_name__',
)
for variant1 in variants:
for variant2 in variants:
self.assertTrue(string_util.attribute_name_match(variant1, variant2))
def test_with_variants_of_the_same_name(self):
variants = (
'some_name',
'__some_name',
'some_name__',
'__some_name__',
)
for variant1 in variants:
for variant2 in variants:
self.assertTrue(
string_util.attribute_name_match(variant1, variant2))
def _update_layout_with_field_attributes(self, layout, attributes):
"""A method that modifies a given layout with the given field attributes.
Args:
layout: an object representing a layout.
attributes: a list of objects representing field attributes.
"""
attributes_alignment = self._compound_type_bit_alignment()
for attribute in attributes:
if string_util.attribute_name_match(attribute.name, 'packed'):
layout.bit_alignment = self._compound_type_bit_alignment()
elif string_util.attribute_name_match(attribute.name, 'aligned'):
byte_alignment = self._expression_evaluator.evaluate(
expression=attribute.parameters[0], )
attributes_alignment = self._lcm(
attributes_alignment,
8 * byte_alignment,
)
layout.bit_alignment = self._lcm(
layout.bit_alignment,
attributes_alignment,
)
def test_with_variants_of_different_names(self):
variants1 = (
'some_name_1',
'__some_name_1',
'some_name_1__',
'__some_name_1__',
)
variants2 = (
'some_name_2',
'__some_name_2',
'some_name_2__',
'__some_name_2__',
)
for variant1 in variants1:
for variant2 in variants2:
self.assertFalse(string_util.attribute_name_match(variant1, variant2))
def test_with_variants_of_different_names(self):
variants1 = (
'some_name_1',
'__some_name_1',
'some_name_1__',
'__some_name_1__',
)
variants2 = (
'some_name_2',
'__some_name_2',
'some_name_2__',
'__some_name_2__',
)
for variant1 in variants1:
for variant2 in variants2:
self.assertFalse(
string_util.attribute_name_match(variant1, variant2))
def _is_alignment_overriden(self, type_definition):
if hasattr(type_definition, 'attributes'):
for attribute in type_definition.attributes:
if string_util.attribute_name_match(attribute.name, 'aligned'):
return True
return False
def _is_packed(self, attributes):
for attribute in attributes:
if string_util.attribute_name_match(attribute.name, 'packed'):
return True
return False
def _is_alignment_overriden(self, type_definition):
if hasattr(type_definition, 'attributes'):
for attribute in type_definition.attributes:
if string_util.attribute_name_match(attribute.name, 'aligned'):
return True
return False
def _is_packed(self, attributes):
for attribute in attributes:
if string_util.attribute_name_match(attribute.name, 'packed'):
return True
return False
