def parse(cls, bfr):
self = cls()
# pylint: disable=attribute-defined-outside-init
self.tag_id = bfr.take(4)
with Pfx(self.tag_id):
size = UInt32BE.parse_value(bfr)
self.flags = UInt16BE.parse_value(bfr)
if size < 1:
warning("size < 1")
else:
data_bs = bfr.take(size)
data_type = self.tag_id_class(self.tag_id)
if data_type is None:
self.dataframe_body = data_bs
else:
databfr = CornuCopyBuffer([data_bs])
self.datafrome_body = data_type.parse(databfr)
if not databfr.at_eof():
warning("unparsed data: %r" % (databfr.take(...), ))
return self
def parse(cls, bfr):
self = cls()
# pylint: disable=attribute-defined-outside-init
self.tag_id = bfr.take(3)
with Pfx(self.tag_id):
sz0, sz1, sz2 = bfr.take(3)
size = sz0 << 16 | sz1 << 8 | sz2
if size < 1:
warning("size < 1")
else:
data_bs = bfr.take(size)
if not data_bs or data_bs[0] == 0:
# forbidden empty data or data zeroed out
data_type = None
else:
data_type = self.tag_id_class(self.tag_id)
if data_type is None:
self.value = data_bs
else:
databfr = CornuCopyBuffer([data_bs])
self.value = data_type.parse(databfr)
if not databfr.at_eof():
warning("unparsed data: %r" % (databfr.take(...), ))
return self