#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright © 2015-2018 Johann A. Briffa
#
# This file is part of CR2_Scripts.
#
# CR2_Scripts 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 3 of the License, or
# (at your option) any later version.
#
# CR2_Scripts 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 CR2_Scripts.  If not, see <http://www.gnu.org/licenses/>.

import sys
import os
import argparse

sys.path.append(os.path.join(os.path.dirname(os.path.realpath(__file__)),'pyshared'))
import jbtiff

## main program

def main():
   # interpret user options
   parser = argparse.ArgumentParser()
   parser.add_argument("-i", "--input", required=True,
                     help="input raw file to analyse")
   args = parser.parse_args()

   # read input raw file
   tiff = jbtiff.tiff_file(open(args.input, 'rb'))
   # display memory map
   mmap = tiff.get_memorymap()
   print "*** Memory Map ***"
   next_offset = 0
   for offset, length, description in sorted(mmap):
      if offset > next_offset:
         print "*%8d - %8d\t%8d" % (next_offset, offset-1, offset-next_offset)
      print " %8d - %8d\t%8d\t%s" % (offset, offset+length-1, length, description)
      next_offset = offset + length
   print "*** END ***"

   return

# main entry point
if __name__ == '__main__':
   main()