The Common.h header file defines constants, enumerations, data types, and functions used by all modules
in the SWU library API.
This module exposes the following useful features:
- Constants for field length limits and invalid values
- Enumerations to represent update states and outcomes of API calls and of update installations
- Data structures for holding information about update targets and installation failures
- Utility functions for reference counting of library objects and for converting enumerated constants to strings