com.vethrfolnir.encdec.ReadDataFiles.java Source code

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Here is the source code for com.vethrfolnir.encdec.ReadDataFiles.java

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/**
 * Copyright (C) 2013-2014 Project-Vethrfolnir
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package com.vethrfolnir.encdec;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;

import java.io.DataInputStream;
import java.io.File;
import java.net.URL;
import java.nio.ByteOrder;

import com.vethrfolnir.tools.PrintData;

/**
 * @author Vlad
 *
 */
public class ReadDataFiles {

    public static void main(String[] args) throws Exception {

        File dir = new File("./res/");

        for (String filename : dir.list()) {
            File file = new File("./res/", filename);

            if (!file.isDirectory()) {
                System.out.println("File --- " + file.getName());
                readFile(file.toURI().toURL());
            }
        }
    }

    // 1057531803 -497237369 -1814922567 551462847
    //static BigInteger[] biXor = { new BigInteger("1057531803"), new BigInteger("0xE25CC287"), new BigInteger("0x93D27AB9"), new BigInteger("0x20DEA7BF") };
    static long[] xor_tab_datfile = new long[] { 0x3F08A79B, 0xE25CC287, 0x93D27AB9, 0x20DEA7BF };
    //static long[] xor_tab_datfile = new long[] { 0x3F08A79B, 0xE25CC287, 0x93D27AB9, 0x20DEA7BF };

    public static long[] readFile(URL url) {

        ByteBuf buff = Unpooled.buffer().order(ByteOrder.LITTLE_ENDIAN);

        try (DataInputStream is = new DataInputStream(url.openStream())) {
            buff.writeBytes(is, is.available());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        int bits2 = buff.readUnsignedShort();

        System.out.println("First two bits: " + bits2 + " hex: 0x" + PrintData.fillHex(bits2, 2));

        long[] out_dat = new long[12];

        buff.readerIndex(6);
        int pointer = 0;
        for (int i = 0; i < 3; i++) {
            long[] buf = new long[4];

            for (int j = 0; j < 4; j++) {
                buf[j] = buff.readUnsignedInt();
            }

            out_dat[pointer++] = buf[0] ^ (xor_tab_datfile[0]);
            out_dat[pointer++] = buf[1] ^ (xor_tab_datfile[1] & 0xFFFFFFFFL);
            out_dat[pointer++] = buf[2] ^ (xor_tab_datfile[2] & 0xFFFFFFFFL);
            out_dat[pointer++] = buf[3] ^ (xor_tab_datfile[3]);
        }

        for (int i = 0; i < out_dat.length; i++) {
            System.out.print(" " + (out_dat[i]));
        }

        System.out.println();
        return null;
    }
}