This is a modified version of the dbc file parser that is included with cantools written by Erik Moqvist https://github.com/eerimoq/cantools

Changes made:

• Removed everything except for the pieces needed to read and write DBC files.
• Improved the overall performance of the code
• Added 103 Vector defined attributes
• Added handling of GMParameterId's
• Added proper decoding of GMParameterId's and J1939 PDU Id's
• Added support for ECU's
• Fixed default attributes not propigating to the respective ovject types
• Added classes that represent a couple of different types of frame id's
• Added listing RX and TX signals that are attached to a node
• Added receivers list to messages
• Added encoding and decoding using a node
• Added encoding via a signal

This is not a drop in replacement for the cantools dbc parser, there are code changes that would need to be made in order for this to run