c-guess-region is an interactive autoloaded compiled Lisp function in `cc-guess.el'.

(c-guess-region START END &optional ACCUMULATE)

Guess the style on the region and install it.

The style is given a name based on the file's absolute file name.

If given a prefix argument (or if the optional argument ACCUMULATE is
non-nil) then the previous guess is extended, otherwise a new guess is
made from scratch.