def test_binary_parsing():
"""Make sure we can parse binary node descriptors."""
bin_node = b'\x00\x00\x00\x00\x00\x00\x00\x00\x0f\x10\x008\xff\xff\x00\n\n\x00\x00\x00'
str_node = parse_binary_descriptor(bin_node)
assert str_node == '(system input 0 always) => unbuffered 15 using copy_latest_a'
bin_node = b'\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x010\x020\x02\n\x05\x00\x00\x00'
str_node = parse_binary_descriptor(bin_node)
assert str_node == '(input 1 always && input 2 when count >= 1) => buffered 1 using copy_all_a'
def add_node(self, binary_descriptor):
"""Add a node to the sensor_graph using a binary node descriptor.
Args:
binary_descriptor (bytes): An encoded binary node descriptor.
Returns:
int: A packed error code.
"""
try:
node_string = parse_binary_descriptor(binary_descriptor)
except:
self._logger.exception("Error parsing binary node descriptor: %s", binary_descriptor)
return _pack_sgerror(SensorGraphError.INVALID_NODE_STREAM) # FIXME: Actually provide the correct error codes here
try:
self.graph.add_node(node_string)
except NodeConnectionError:
return _pack_sgerror(SensorGraphError.STREAM_NOT_IN_USE)
except ProcessingFunctionError:
return _pack_sgerror(SensorGraphError.INVALID_PROCESSING_FUNCTION)
except ResourceUsageError:
return _pack_sgerror(SensorGraphError.NO_NODE_SPACE_AVAILABLE)
return Error.NO_ERROR
def FromBinary(cls, record_data, record_count=1):
"""Create an UpdateRecord subclass from binary record data.
This should be called with a binary record blob (NOT including the
record type header) and it will decode it into a AddNodeRecord.
Args:
record_data (bytearray): The raw record data that we wish to parse
into an UpdateRecord subclass NOT including its 8 byte record header.
record_count (int): The number of records included in record_data.
Raises:
ArgumentError: If the record_data is malformed and cannot be parsed.
Returns:
AddNodeRecord: The decoded reflash tile record.
"""
_cmd, address, _resp_length, payload = cls._parse_rpc_info(record_data)
descriptor = parse_binary_descriptor(payload)
return AddNodeRecord(descriptor, address=address)