Hi Nirav,
If you are just looking for something that's more-or-less adequate, I've
had good luck with VIM and it's internal C-indenting. (http://www.vim.org
... you have to skip past the protest splash page.)
You could set up VIM to process each of your files.
If you need a real re-formatter (changes where the curly braces go, adds
removes newlines, yada yada yada), you may have to write your own. Perhaps
in perl.
--Eljay