Log format changer

logformat.py

import os
import re
syslogre = re.compile('sys_log\([0-9]+, "([^"]*?)".*?\);', re.DOTALL)
# http://stackoverflow.com/a/8915445/1318435
printfre = re.compile("(%(?:\d+\$)?[+-]?(?:[ 0]|'.{1})?-?\d*(?:\.\d+)?[bcdeEufFgGosxX])")

def processFile(file):
	def replacer(m):
		def incr(m):
			incr.counter+=1
			return "{{{0}}}".format(incr.counter-1)
		incr.counter = 0
		return m.string[ m.start(0): m.start(1)] + printfre.sub(incr, m.string[ m.start(1): m.end(1)]) + m.string[ m.end(1): m.end(0)]
	with open(file, "r+") as f:
		contents = f.read()
		replaced = syslogre.sub(replacer, contents)
		f.seek(0)
		f.truncate()
		f.write(replaced)

for root, dirs, files in os.walk("."):
	for name in files:
		file = os.path.join(root, name)
		baseName, ext = os.path.splitext(file)
		if ext in [".cpp", ".c", ".h", ".hpp"]:
			print file
			processFile(file)