libyaz0/main.py at master · birdddev/libyaz0 · GitHub

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# libyaz0
# Version 0.5
# Copyright © 2017-2018 MasterVermilli0n / AboodXD

# This file is part of libyaz0.

# libyaz0 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.

# libyaz0 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, see <http://www.gnu.org/licenses/>.

################################################################
################################################################

import os.path
import sys
import time

from src import decompress, compress, guessFileExt


def printInfo():
    print("\nUsage:")
    print("  main [option...] input")
    print("\nOptions:")
    print(" -o <output>           Output file, if not specified, the output file will have the same name as the input file")
    print(" -c                    Compress (Will try to decompress if not specified)")
    print("\nCompression options:")
    print(" -level <level>        compression level (0-9) (1 is the default)")
    print("                       0: No compression (Fastest)")
    print("                       9: Best compression (Slowest)")
    print(" -align <alignment>    the alignment value for the uncompressed data (0 is the default)")
    print("\nExiting in 5 seconds...")
    time.sleep(5)
    sys.exit(1)


def main():
    print("libyaz0 v0.5")
    print("(C) 2017-2018 MasterVermilli0n / AboodXD")

    if len(sys.argv) < 2:
        printInfo()

    input_ = sys.argv[-1]

    if not os.path.isfile(input_):
        print("\nFile doesn't exist!")
        print("\nExiting in 5 seconds...")
        time.sleep(5)
        sys.exit(1)

    compressYaz = False

    if "-c" in sys.argv:
        compressYaz = True

    if "-o" in sys.argv:
        output_ = sys.argv[sys.argv.index("-o") + 1]

    else:
        output_ = ''.join([os.path.splitext(input_)[0], ".szs"])

    if compressYaz:
        if "-align" in sys.argv:
            try:
                alignment = int(sys.argv[sys.argv.index("-align") + 1], 0)

            except ValueError:
                alignment = 0

        else:
            alignment = 0

        if "-level" in sys.argv:
            try:
                level = int(sys.argv[sys.argv.index("-level") + 1], 0)

            except ValueError:
                level = 1

        else:
            level = 1

        if not 0 <= level <= 9:
            print("Invalid compression level!\n")
            print("Exiting in 5 seconds...")
            time.sleep(5)
            sys.exit(1)

        with open(input_, "rb") as inf:
            inb = inf.read()

        data = compress(inb, alignment, level)

        with open(output_, "wb+") as out:
            out.write(data)

    else:
        with open(input_, "rb") as inf:
            inb = inf.read()

        data = decompress(inb)
        ext = guessFileExt(data)

        with open(''.join([output_, ext]), "wb+") as out:
            out.write(data)


if __name__ == '__main__':
    main()