/*
 * 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; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
package com.l2dot.gameserver.network.loginserverpackets;

import com.l2dot.gameserver.TaskPriority;

/**
 * @author -Wooden-
 *
 */
public abstract class LoginServerBasePacket
{
	private byte[] _decrypt;
	private int _off;

	public LoginServerBasePacket(byte[] decrypt)
	{
		_decrypt = decrypt;
		_off = 1;		// skip packet type id
	}

	public int readD()
	{
		int result = _decrypt[_off++] &0xff;
		result |= _decrypt[_off++] << 8 &0xff00;
		result |= _decrypt[_off++] << 0x10 &0xff0000;
		result |= _decrypt[_off++] << 0x18 &0xff000000;
		return result;
	}

	public int readC()
	{
		int result = _decrypt[_off++] &0xff;
		return result;
	}

	public int readH()
	{
		int result = _decrypt[_off++] &0xff;
		result |= _decrypt[_off++] << 8 &0xff00;
		return result;
	}

	public double readF()
	{
		long result = _decrypt[_off++] &0xff;
		result |= _decrypt[_off++] << 8 &0xff00;
		result |= _decrypt[_off++] << 0x10 &0xff0000;
		result |= _decrypt[_off++] << 0x18 &0xff000000;
		result |= _decrypt[_off++] << 0x20 &0xff00000000l;
		result |= _decrypt[_off++] << 0x28 &0xff0000000000l;
		result |= _decrypt[_off++] << 0x30 &0xff000000000000l;
		result |= _decrypt[_off++] << 0x38 &0xff00000000000000l;
		return Double.longBitsToDouble(result);
	}

	public String readS()
	{
		String result = null;
		try
		{
			result = new String(_decrypt,_off,_decrypt.length-_off, "UTF-16LE");
			result = result.substring(0, result.indexOf(0x00));
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		_off += result.length()*2 + 2;
		return result;
	}

	public final byte[] readB(int length)
	{
		byte[] result = new byte[length];
		for(int i = 0; i < length; i++)
		{
			result[i]=_decrypt[_off+i];
		}
		_off += length;
		return result;
	}

	public TaskPriority getPriority() { return TaskPriority.PR_HIGH; }
}
