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# Copyright (C) 2010-2017 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import re
from webkit import model
def combine_condition(conditions):
if conditions:
if len(conditions) == 1:
return conditions[0]
else:
return bracket_if_needed(' && '.join(map(bracket_if_needed, conditions)))
else:
return None
def bracket_if_needed(condition):
if re.match(r'.*(&&|\|\|).*', condition):
return '(%s)' % condition
else:
return condition
def parse(file):
receiver_enabled_by = None
receiver_enabled_by_exception = False
receiver_enabled_by_conjunction = None
receiver_dispatched_from = None
receiver_dispatched_to = None
receiver_attributes = None
shared_preferences_needs_connection = False
destination = None
messages = []
conditions = []
master_condition = None
superclass = []
namespace = "WebKit"
file_contents = file.readlines()
match = re.search(r'\s*\[\s*(?P<extended_attributes>.*?)\s*\]\s*.*messages -> ', "".join(file_contents).replace("\n", " "), re.MULTILINE)
if match:
extended_attributes = re.split(r'\s*,\s*', match.group('extended_attributes'))
for attribute in extended_attributes:
match = re.match(r'(?P<name>\w+)\s*=\s*(?P<value>.+)', attribute)
if match:
if match.group('name') == 'EnabledBy':
(receiver_enabled_by, receiver_enabled_by_conjunction) = parse_enabled_by_string(match.group('value'))
continue
if match.group('name') == 'DispatchedFrom':
receiver_dispatched_from = parse_process_name_string(match.group('value'))
continue
if match.group('name') == 'DispatchedTo':
receiver_dispatched_to = parse_process_name_string(match.group('value'))
continue
elif attribute == 'SharedPreferencesNeedsConnection':
shared_preferences_needs_connection = True
continue
elif attribute == 'ExceptionForEnabledBy':
receiver_enabled_by_exception = True
continue
raise Exception("ERROR: Unknown extended attribute: '%s'" % attribute)
if receiver_enabled_by and receiver_enabled_by_exception:
raise Exception("ERROR: 'ExceptionForEnabledBy' cannot be used together with 'EnabledBy=%s'" % receiver_enabled_by)
for line in file_contents:
line = line.strip()
match = re.search(r'messages -> (?P<namespace>[A-Za-z]+)::(?P<destination>[A-Za-z_0-9]+) \s*(?::\s*(?P<superclass>.*?) \s*)?(?:(?P<attributes>.*?)\s+)?{', line)
if not match:
match = re.search(r'messages -> (?P<destination>[A-Za-z_0-9]+) \s*(?::\s*(?P<superclass>.*?) \s*)?(?:(?P<attributes>.*?)\s+)?{', line)
else:
if match.group('namespace'):
namespace = match.group('namespace')
if match:
receiver_attributes = parse_attributes_string(match.group('attributes'))
if match.group('superclass'):
superclass = match.group('superclass')
if receiver_enabled_by:
raise Exception("ERROR: EnabledBy is not supported for a message receiver with a superclass")
if conditions:
master_condition = conditions
conditions = []
destination = match.group('destination')
continue
if line.startswith('#'):
if line.startswith('#if '):
conditions.append(line[4:])
elif line.startswith('#endif') and conditions:
conditions.pop()
elif line.startswith('#else') or line.startswith('#elif'):
raise Exception("ERROR: '%s' is not supported in the *.in files" % line)
continue
match = re.search(r'(?:\[(.*)\] (?:.* )?)?([A-Za-z_0-9]+)\((.*?)\)(?:(?:\s+->\s+)\((.*?)\))?(?:\s+(.*))?', line)
if match:
options_string, name, parameters_string, reply_parameters_string, attributes_string = match.groups()
if parameters_string:
parameters = parse_parameters_string(parameters_string)
for parameter in parameters:
parameter.condition = combine_condition(conditions)
else:
parameters = []
validator = None
enabled_by = None
enabled_by_exception = False
enabled_by_conjunction = None
coalescing_key_indices = None
if options_string:
match = re.search(r"(?:(?:, |^)+(?:Validator=(.*)))(?:, |$)?", options_string)
if match:
validator = match.groups()[0]
match = re.search(r"(?:(?:, |^)+(?:EnabledBy=([\w \&\|]+)))(?:, |$)?", options_string)
if match:
(enabled_by, enabled_by_conjunction) = parse_enabled_by_string(match.groups()[0])
match = re.search(r"(?:(?:, |^)+(?:ExceptionForEnabledBy))(?:, |$)?", options_string)
if match:
enabled_by_exception = True
match = re.search(r"(?:(?:, |^)+(?:DeferSendingIfSuspended))(?:, |$)?", options_string)
if match:
coalescing_key_indices = []
match = re.search(r"(?:(?:, |^)+(?:DeferSendingIfSuspendedWithCoalescingKeys=\((.*?)\)))(?:, |$)?", options_string)
if match:
coalescing_key_indices = parse_coalescing_keys(match.group(1), [parameter.name for parameter in parameters])
if enabled_by and enabled_by_exception:
raise Exception("ERROR: 'ExceptionForEnabledBy' cannot be used together with 'EnabledBy=%s'" % enabled_by)
attributes = parse_attributes_string(attributes_string)
if reply_parameters_string:
reply_parameters = parse_parameters_string(reply_parameters_string)
for reply_parameter in reply_parameters:
reply_parameter.condition = combine_condition(conditions)
elif reply_parameters_string == '':
reply_parameters = []
else:
reply_parameters = None
if coalescing_key_indices is not None and reply_parameters is not None:
raise Exception(f"ERROR: DeferSendingIfSuspended not supported for message {name} since it contains reply parameters")
messages.append(model.Message(name, parameters, reply_parameters, attributes, combine_condition(conditions), validator, enabled_by, enabled_by_exception, enabled_by_conjunction, coalescing_key_indices))
return model.MessageReceiver(destination, superclass, receiver_attributes, receiver_enabled_by, receiver_enabled_by_exception, receiver_enabled_by_conjunction, receiver_dispatched_from, receiver_dispatched_to, shared_preferences_needs_connection, messages, combine_condition(master_condition), namespace)
def parse_attributes_string(attributes_string):
if not attributes_string:
return None
return attributes_string.split()
def split_parameters_string(parameters_string):
parameters = []
current_parameter_string = ''
nest_level = 0
for character in parameters_string:
if character == ',' and nest_level == 0:
parameters.append(current_parameter_string)
current_parameter_string = ''
continue
if character == '<':
nest_level += 1
elif character == '>':
nest_level -= 1
current_parameter_string += character
parameters.append(current_parameter_string)
return parameters
def parse_parameters_string(parameters_string):
parameters = []
for parameter_string in split_parameters_string(parameters_string):
match = re.search(r'\s*(?:\[(?P<attributes>.*?)\]\s+)?(?P<type_and_name>.*)', parameter_string)
attributes_string, type_and_name_string = match.group('attributes', 'type_and_name')
split = type_and_name_string.rsplit(' ', 1)
parameter_kind = 'class'
if split[0].startswith('struct '):
parameter_kind = 'struct'
split[0] = split[0][7:]
elif split[0].startswith('enum:'):
parameter_kind = split[0][:split[0].find(' ')]
split[0] = split[0][split[0].find(' ') + 1:]
if len(split) != 2:
raise Exception("ERROR: Argument '%s' in parameter list '%s' is missing either type or name" % (type_and_name_string, parameter_string))
parameter_type = split[0]
parameter_name = split[1]
parameters.append(model.Parameter(kind=parameter_kind, type=parameter_type, name=parameter_name, attributes=parse_attributes_string(attributes_string)))
return parameters
def parse_enabled_by_string(enabled_by_string):
enabled_by = None
enabled_by_conjunction = None
has_and_conjunction = '&&' in enabled_by_string
has_or_conjunction = '||' in enabled_by_string
if has_and_conjunction and has_or_conjunction:
raise Exception('ERROR: EnabledBy cannot contain both && and || conjunctions')
elif has_and_conjunction:
enabled_by = re.split(r'\s*&&\s*', enabled_by_string)
enabled_by_conjunction = '&&'
elif has_or_conjunction:
enabled_by = re.split(r'\s*\|\|\s*', enabled_by_string)
enabled_by_conjunction = '||'
else:
enabled_by = [enabled_by_string.strip()]
enabled_by_conjunction = None
return enabled_by, enabled_by_conjunction
def parse_process_name_string(value):
if value in ["UI", "Networking", "GPU", "WebContent", "Model"]:
return value
raise Exception('ERROR: Invalid Process Name found')
def parse_coalescing_keys(coalescing_keys_string, parameter_names):
coalescing_key_names = [part.strip() for part in coalescing_keys_string.split(',')]
return [parameter_names.index(name) for name in coalescing_key_names]
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