libchaste VS cii

I’ve had a look at the repository. Three immediate comments: 1. There is effectively no documentation. Just one small example file. How do you expect people to use your project without comprehensive documentation and examples? It shows a real lack of care for users. 2. The configuration system is really verbose. It’s not clear that there are any benefits using this system over standard getopt approaches. Here’s an example of a system which I thing does improve on the ease of use over getopt. 3. Why use this library? What benefit does it have over all the others.

This is an example of a numerics parser written as a state machine. It might give you some ideas on how this could be done: https://github.com/mgrosvenor/libchaste/blob/master/parsing/numeric_parser.c

David R Hanson wrote a book back in 1997 that's used in some college CS courses and somewhat solves this problem. The book itself explains the interfaces and design details in depth, but the source code is here: https://github.com/drh/cii

If you want to have a look at an example implementation, the book C Interfaces and Implementations has one. If you want to skip forward to just the implementation, it's available on GitHub.