Modifying many function calls

[Andrea Crotti <andrea.crotti.0@gmail.com>]

I would like to finally prepend a prefix to all my personal functions.
Since they are 80 at the moment I would like to do it automatically.

For the (defun fun) part is easy, but what about all the places when
they are called?

I should loop on all the
(defun fun) and substitute all the occurrences of fun every time, what's
the best way to do it with Emacs?

Thanks,
Andrea