#! /usr/bin/python

""" crap.py - Comment Removing Ascii Parser
	Copyright (C) 2001  Thomas Andrews

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
"""


import sys, getopt, string, os, signal
#----------------------------------------------------------
infile = ''
outfile = ''
#----------------------------------------------------------
def help_message():
    print '''\
Usage:   crap [Options] [Infile] [Outfile]
Options: -h or --help       -- displays this help message
         -v or --version    -- displays the version'''
    sys.exit(0)
#----------------------------------------------------------
def cleanup():
    if infile  != '': infile.close()
    if outfile != '': outfile.close()
    sys.exit(0)
#----------------------------------------------------------
def signal_handler(signal, frame):
    cleanup()
#----------------------------------------------------------

#   ---- Get all the command-line args ----
try:
    options, xarguments = getopt.getopt(sys.argv[1:], 'hv', ['help','version'])
except getopt.error:
    print 'Error: Unknown option' 
    help_message()
    sys.exit(0)

#   ---- Check if too many files were specified ----
if len(xarguments) > 2:
    print 'Error: You haven\'t supplied the correct number of arguments'
    help_message()

#   ---- Check if any of the Options flags were specified ----
for a in options[:]:
    if a[0] == '-h' or a[0] == '--help':
        help_message()
for a in options[:]:
    if a[0] == '-v' or a[0] == '--version':
        print 'crap version 1.0.002'
        sys.exit(0)

#   ---- Open the specified "input" file ----
if len(xarguments) > 0:
    try: infile  = open(xarguments[0], 'r')
    except IOError:
        print 'Can\'t open "' + xarguments[0] + '" for reading.' 
        cleanup()

#   ---- Open the specified "output" file ----
if len(xarguments) > 1:
    try: outfile = open(xarguments[1],'w')
    except IOError:
        print 'Can\'t open "' + xarguments[1] + '" for writing.'
        cleanup()

#   ---- Parse the data, deleting lines that start with # or ; ---
signal.signal(signal.SIGINT, signal_handler)
while 1:
    if infile: data = infile.readline()
    else:      data = sys.stdin.readline()
    if data:
        list = string.split(data)
        if len(list) and list[0][0] != '#' and list[0][0] != ';':
            if not outfile: sys.stdout.write(data)
            else: outfile.write(data)
    else: break
cleanup()