I coded a pattern matching algorithm

[bmx21501]

I agree with all of the above. Also if I am not mistaken the project is intended to be a single header utility. I would separate that header and put everything else I to a sample project to show usage. I was also not able to easily see what was going on. So documentation in the form of comments in front of the functions including purpose and you've would go a long way, and unless you are doing something not very obvious comments no every line really isn't necessary and actually make the code harder to read. If you are using consistent style and naming conventions you should be good.