mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-09-20 16:15:51 +00:00
67 lines
1.8 KiB
Python
67 lines
1.8 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
#
|
||
|
|
# Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
||
|
|
#
|
||
|
|
# This file is part of PortaPack.
|
||
|
|
#
|
||
|
|
# 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, 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; see the file COPYING. If not, write to
|
||
|
|
# the Free Software Foundation, Inc., 51 Franklin Street,
|
||
|
|
# Boston, MA 02110-1301, USA.
|
||
|
|
#
|
||
|
|
|
||
|
|
import sys
|
||
|
|
import struct
|
||
|
|
|
||
|
|
usage_message = """
|
||
|
|
PortaPack image chunk writer
|
||
|
|
|
||
|
|
Usage: <command> <input_binary> <four-characer tag> <output_tagged_binary>
|
||
|
|
"""
|
||
|
|
|
||
|
|
def read_image(path):
|
||
|
|
f = open(path, 'rb')
|
||
|
|
data = f.read()
|
||
|
|
f.close()
|
||
|
|
return data
|
||
|
|
|
||
|
|
def write_image(data, path):
|
||
|
|
f = open(path, 'wb')
|
||
|
|
f.write(data)
|
||
|
|
f.close()
|
||
|
|
|
||
|
|
if len(sys.argv) != 4:
|
||
|
|
print(usage_message)
|
||
|
|
sys.exit(-1)
|
||
|
|
|
||
|
|
input_image = read_image(sys.argv[1])
|
||
|
|
tag = sys.argv[2].encode()
|
||
|
|
output_path = sys.argv[3]
|
||
|
|
|
||
|
|
if len(tag) != 4:
|
||
|
|
print(usage_message)
|
||
|
|
sys.exit(-2)
|
||
|
|
|
||
|
|
input_image_max_length = 32768
|
||
|
|
if len(input_image) > input_image_max_length:
|
||
|
|
raise RuntimeError('image size of %d exceeds device size of %d bytes' % (len(input_image), input_image_max_length))
|
||
|
|
if (len(input_image) & 3) != 0:
|
||
|
|
raise RuntimeError('image size of %d is not multiple of four' % (len(input_image,)))
|
||
|
|
|
||
|
|
output_image = bytearray()
|
||
|
|
output_image += struct.pack('<4sI', tag, len(input_image))
|
||
|
|
output_image += input_image
|
||
|
|
|
||
|
|
write_image(output_image, output_path)
|