How to manage a fixed data set

When you have a set of fixed data within your program (for example, data that identifies the mode of a job, or data that indicates the delay before turning on an output), the best way to manage, load, save, etc. it is to define data structure types (typedef structs), in which the fixed data is defined, and to define a set of functions for various operations related to the data (such as resetting it to its default values, etc.).

The data structure is declared in common.h (or in a .h file included in common).

Within the same .h file I also define the functions and variables to perform operations with the data.

Example: