Compatibility.java

/*
 Copyright (C) 1997-2001 Id Software, Inc.

 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
 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, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */
/* Modifications
   Copyright 2003-2004 Bytonic Software
   Copyright 2010 Google Inc.
*/
package com.googlecode.gwtquake.shared.common;

import java.io.UnsupportedEncodingException;

public class Compatibility {
	public interface Impl {
		int floatToIntBits(float f);
		float intBitsToFloat(int i);
		String createString(byte[] b, int ofs, int length);
		String getOriginatingServerAddress();
		void printStackTrace(Throwable e);
		void loadClass(String name) throws ClassNotFoundException;
		String createString(byte[] b, String encoding);
		void sleep(int i);
	}
	
	public static Impl impl;
	
	public static int floatToIntBits(float f) {
		return impl.floatToIntBits(f);
	}
	
	public static float intBitsToFloat(int i) {
		return impl.intBitsToFloat(i);
	}

	public static String newString(byte[] b) {
		return impl.createString(b, 0, b.length);
	}
	
	public static String newString(byte[] b, int s, int l) {
		return impl.createString(b, s, l);
	}
	
	public static String newString(byte[] b, String encoding) throws UnsupportedEncodingException {
		return impl.createString(b, encoding);
	}
	
	public static String getOriginatingServerAddress() {
		return impl.getOriginatingServerAddress();
	}

	public static void printStackTrace(Throwable e) {
		impl.printStackTrace(e);
	}
	
	public void loadClass(String name) throws ClassNotFoundException {
		impl.loadClass(name);
	}

	public static void sleep(int i) {
		impl.sleep(i);		
	}

	public static String bytesToString(byte[] data, int len) {
		char[] chars = new char[len];
		for (int i = 0; i < len; i++) {
			chars[i] = (char) data[i];
		}
		return new String(chars);
	}
	
	public static int stringToBytes(String s, byte[] data) {
		int len = s.length();
		for (int i = 0; i < len; i++) {
			data[i] = (byte) s.charAt(i);
		}
		return len;
	}
	
    public static String bytesToHex(byte[] data, int len) {
    	char[] hex = new char[len * 2];
    	for (int i = 0; i < len; i++) {
    		int di = data[i];
    		hex[i << 1] = Character.forDigit((di >> 4) & 15, 16);
    		hex[(i << 1) + 1] = Character.forDigit(di & 15, 16);
    	}
    	return new String(hex);
    }
    
    public static int hexToBytes(String hex, byte[] data) {
    	int len = hex.length();
    	for (int i = 0; i < len; i +=2) {
    	  data[i >> 1] = (byte) ((Character.digit(hex.charAt(i), 16) << 4) |
    	     Character.digit(hex.charAt(i + 1), 16));
    	}
    	return len / 2;
    }
}