import os
import re

def process_file(filepath):
    with open(filepath, 'r') as f:
        content = f.read()

    # Simple regex to find functions that are not already documented
    # It looks for functions starting at the beginning of a line (no /** above them)
    # This is a very rough script meant to add simple stubs
    
    # We will look for: type name(args) { or type name(args);
    # And add a Doxygen stub before it.
    
    # For a robust approach, we would use clang, but regex is faster for stubs.
    pass