/*
 * This file is part of the L2J Mobius project.
 * 
 * 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.l2jmobius.util;

import java.net.UnknownHostException;

import javolution.text.TextBuilder;

/**
 * This class ...
 * @version $Revision: 1.2 $ $Date: 2004/06/27 08:12:59 $
 */
public class Util
{
	public static boolean isInternalIP(String ipAddress)
	{
		java.net.InetAddress addr = null;
		try
		{
			addr = java.net.InetAddress.getByName(ipAddress);
			return addr.isSiteLocalAddress() || addr.isLoopbackAddress();
		}
		catch (final UnknownHostException e)
		{
			e.printStackTrace();
		}
		return false;
	}
	
	public static String printData(byte[] data, int len)
	{
		final TextBuilder result = new TextBuilder();
		
		int counter = 0;
		
		for (int i = 0; i < len; i++)
		{
			if ((counter % 16) == 0)
			{
				result.append(fillHex(i, 4) + ": ");
			}
			
			result.append(fillHex(data[i] & 0xff, 2) + " ");
			counter++;
			if (counter == 16)
			{
				result.append("   ");
				
				int charpoint = i - 15;
				for (int a = 0; a < 16; a++)
				{
					final int t1 = data[charpoint++];
					if ((t1 > 0x1f) && (t1 < 0x80))
					{
						result.append((char) t1);
					}
					else
					{
						result.append('.');
					}
				}
				
				result.append("\n");
				counter = 0;
			}
		}
		
		final int rest = data.length % 16;
		if (rest > 0)
		{
			for (int i = 0; i < (17 - rest); i++)
			{
				result.append("   ");
			}
			
			int charpoint = data.length - rest;
			for (int a = 0; a < rest; a++)
			{
				final int t1 = data[charpoint++];
				if ((t1 > 0x1f) && (t1 < 0x80))
				{
					result.append((char) t1);
				}
				else
				{
					result.append('.');
				}
			}
			
			result.append("\n");
		}
		
		return result.toString();
	}
	
	public static String fillHex(int data, int digits)
	{
		String number = Integer.toHexString(data);
		
		for (int i = number.length(); i < digits; i++)
		{
			number = "0" + number;
		}
		
		return number;
	}
	
	/**
	 * @param raw
	 * @return
	 */
	public static String printData(byte[] raw)
	{
		return printData(raw, raw.length);
	}
}