def read_object(self, debug_string: str = '') -> Optional[Object]:
"""
Creates and reads a new object from the stream
"""
guid = self.read_guid(debug_string)
res = REGISTRY.create_object(guid)
if res is not None:
self.log('** {} **'.format(res.__class__.__name__), 16)
else:
self.log('{} not found'.format(debug_string), 16)
if res is not None:
self.debug_depth += 1
version = 1
compatible_versions = res.compatible_versions()
if compatible_versions is not None:
version = self.read_ushort('version')
if version not in res.compatible_versions():
supported_versions = ','.join(
[str(v) for v in res.compatible_versions()])
raise UnsupportedVersionException(
'Cannot read {} version {}, only support version(s): {}'
.format(res.__class__.__name__, version,
supported_versions))
res.read(self, version)
self.log('ended {}'.format(res.__class__.__name__))
if self.debug:
print('')
self.debug_depth -= 1
return res
def check_handle(self, file_handle):
try:
guid_bin = binascii.hexlify(file_handle.read(16))
guid = REGISTRY.hex_to_guid(guid_bin)
# check first in unimplemented types
if guid in REGISTRY.NOT_IMPLEMENTED_GUIDS:
return GuidCodeMatch(file_handle.tell() - 16, 16, REGISTRY.NOT_IMPLEMENTED_GUIDS[guid])
obj = REGISTRY.create_object(guid)
if obj is None:
return None
return GuidCodeMatch(file_handle.tell() - 16, 16, str(obj.__class__.__name__))
except: # nopep8, pylint: disable=bare-except
pass
return None