How to extract function comment using sed?

I want to implement a simple utility that would take a C source file and a name of a function, struct, enum or whatever and output the comment directly above the element if present. Ie. /* This is a doc comment * I want this comment extracted */ void function_foo(){ } Usage: utility file.c function_foo Output: This is a doc comment I want this comment extracted The use case for this is that I want to use org-babel in emacs to tangle in documentation for functions right out of source files. Maybe there is a doxygen tool or clang tool that can do this? I just haven't found it yet. The end result would be that I can easily keep up to date documentation extracted from code directly inside my documentation org file that contains other things as well.