Coccinelle: Source-to-Source Transformation Tool for C Code Refactoring

Coccinelle allows programmers to easily write some complex style-preserving source-to-source transformations on C source code

like for instance to perform some refactorings

To install Coccinelle from its source, see the instructions in install.txt

Once you have installed coccinelle, there is a script 'spatch' in /usr/bin or /usr/local/bin that invokes the Coccinelle program

You can download pre-compiled versions of spatch and check which distributions package it here