#!/usr/bin/env python
#
# PySTDF - The Pythonic STDF Parser
# Copyright (C) 2006 Casey Marshall
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#

import sys, re

try:
    import gzip
    have_gzip = True
except ImportError:
    have_gzip = False
try:
    import bz2
    have_bz2 = True
except ImportError:
    have_bz2 = False

from pystdf.IO import Parser
from pystdf.Writers import AtdfWriter
import pystdf.V4

gzPattern = re.compile('\.g?z', re.I)
bz2Pattern = re.compile('\.bz2', re.I)

def process_file(fn):
    filename, = sys.argv[1:]
    
    reopen_fn = None
    if filename is None:
        f = sys.stdin
    elif gzPattern.search(filename):
        if not have_gzip:
            print >>sys.stderr, "gzip is not supported on this system"
            sys.exit(1)
        reopen_fn = lambda: gzip.open(filename, 'rb')
        f = reopen_fn()
    elif bz2Pattern.search(filename):
        if not have_bz2:
            print >>sys.stderr, "bz2 is not supported on this system"
            sys.exit(1)
        reopen_fn = lambda: bz2.BZ2File(filename, 'rb')
        f = reopen_fn()
    else:
        f = open(filename, 'rb')
    p=Parser(inp=f, reopen_fn=reopen_fn)
    p.addSink(AtdfWriter())
    p.parse()
    f.close()

if __name__ == "__main__":
    if len(sys.argv) < 2:
        print "Usage: %s <stdf file>" % (sys.argv[0])
    else:
        process_file(sys.argv[1])