This just looks like you missing things like classes, namespaces etc. in C. Classes, namespaces etc. are a natural way of making API discoverable (among other things). For example if you want to know how to search for a somthing in a string just look at the methods exposed by string.
Then you just pass the buck over to classes and namespaces. You have the same fundamental problem in Ruby and Python, perhaps even worse for lack of typed function signatures.
