Among other things, the protocol I'm working with includes a type and length in its metadata. The payload is a list of substructures that will be of the type specified. Here's a stripped down version of what I'm talking about.
classBinaryProtocol(Structure):
# METADATAa=UBInt32()
b=SBInt16()
c=DispatchField(SBInt8())
e=LengthField(SBInt16())
# DATAdata=DispatchTarget(None, c, {
3: FieldArray(TypeThreeStruct),
4: FieldArray(TypeFourStruct),
})It looks like the current implementation does not allow you to combine these two behaviours, you can either have a non-variable structure repeated, or a single structure of a variable type. The error raised when attempting the above is shown below:
/home/mpelikan/.local/lib/python3.6/site-packages/suitcase/structure.py in unpack(self, data, trailing)
339 340 def unpack(self, data, trailing=False):
--> 341 return self._packer.unpack(data, trailing)
342 343 def pack(self):
/home/mpelikan/.local/lib/python3.6/site-packages/suitcase/structure.py in unpack(self, data, trailing)
62 def unpack(self, data, trailing=False):
63 stream = BytesIO(data)
---> 64 self.unpack_stream(stream)
65 stream.tell()
66 if trailing:
/home/mpelikan/.local/lib/python3.6/site-packages/suitcase/structure.py in unpack_stream(self, stream)
162 163 greedy_data_chunk = inverted_stream.read()[::-1]
--> 164 greedy_field.unpack(greedy_data_chunk)
165 166 if crc_fields:
/home/mpelikan/.local/lib/python3.6/site-packages/suitcase/fields.py in unpack(self, data, **kwargs)
404 raise SuitcaseParseError("Input data contains type byte not"
405 " contained in mapping")
--> 406 message_instance = target_msg_type()
407 self.setval(message_instance)
408 self._value.unpack(data)
TypeError: 'FieldPlaceholder' object is not callable
Among other things, the protocol I'm working with includes a type and length in its metadata. The payload is a list of substructures that will be of the type specified. Here's a stripped down version of what I'm talking about.
It looks like the current implementation does not allow you to combine these two behaviours, you can either have a non-variable structure repeated, or a single structure of a variable type. The error raised when attempting the above is shown below: