UNIX CASE tool to create PDL from C code

[Barbara J. Shelby]

Does anyone know of a CASE tool that runs under UNIX that will read
actual C code and go BACKWARDS to turn it into PDL (pseudocode)?

We have some programs that have already been implemented and need to be
documented in a PDL for a maintenance manual.  If a CASE tool existed that
could do this for us, it would save a lot of time going through the
code.  It would also help us set up PDL standards for programs that
haven't been developed yet.

Also, I couldn't find a group about CASE anywhere.  If there IS one,
could someone let me know so I can post this correctly?  Thanks for any
help.