File: class/Extras/Code/Text/cheader.py

#! /usr/local/bin/python
import sys, re
from string import strip
pattDefine = re.compile( # compile to pattobj
 '^#[\t ]*define[\t ]+([a-zA-Z0-9_]+)[\t ]*(.*)') # "# define xxx yyy..."
pattInclude = re.compile(
 '^#[\t ]*include[\t ]+[<"]([a-zA-Z0-9_/\.]+)') # "# include <xxx>..."
def scan(file):
 count = 0
 for line in file: # scan line-by-line
 count += 1
 matchobj = pattDefine.match(line) # None if match fails
 if matchobj:
 name = matchobj.group(1) # substrings for (...) parts
 body = matchobj.group(2) 
 print count, 'defined', name, '=', strip(body)
 else:
 matchobj = pattInclude.match(line)
 if matchobj:
 start, stop = matchobj.span(1) # start/stop indexes of (...) 
 filename = line[start:stop] # slice out of line
 print count, 'include', filename # same as matchobj.group(1)
if len(sys.argv) == 1:
 scan(sys.stdin) # no args: read stdin
else:
 scan(open(sys.argv[1], 'r')) # arg: input file name