Is there an implementation of comparing files by mask like in .gitignore?

Question

C++ / C#

An analog of git is being made, it has reached the implementation of exceptions for the .gitignore file.
Maybe there is a ready-made library to implement this? It will take a long time to implement all the chips, but I would like to meet the generally accepted standard.

Answer 1

I decided to do everything on regexp . They are included in the standard, you do not need to implement them yourself, you can do almost anything with them.

Answer 2

Git is a complex and interesting product. Inside it is a graph database implemented on top of the file system. Complex. Interesting. And from all this you have no questions? And there was a question on such trifle as implementation of exceptions?
What did you actually implement? So what is your level?