Class SpecMessage

Constructor

Arguments: packedHeader -- string representing the packed header format for the message, use the same syntax as the 'struct' Python module

Read buffer from stream and try to create a message from it

Arguments: streamBuf - string buffer of the last bytes received from Spec

Return value : the number of consumed bytes

Read the header of the message coming from stream

Arguments: rawstring -- raw bytes of the header

Return value: (message data type, message data len) tuple

Read the data part of the message coming from stream

Arguments: rawstring -- raw data bytes datatype -- data type

Return value: the data read

Try to guess data type

Works for obvious cases only

• it is a hard job guessing ARRAY_* types, we ignore this case (user has to provide a suitable datatype)
• we cannot make a difference between ERROR type and STRING type