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/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2010 The eXist Project
 *  http://exist-db.org
 *  
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *  
 *  $Id$
 */
package org.exist.util;

/**
 * @author Dmitriy Shabanov
 *
 */
public class UTF16CharacterSet {

    public static final int NONBMP_MIN = 0x10000;
    public static final int NONBMP_MAX = 0x10FFFF;

	public static final char SURROGATE1_MIN = 0xD800;
	public static final char SURROGATE1_MAX = 0xDBFF;
	public static final char SURROGATE2_MIN = 0xDC00;
	public static final char SURROGATE2_MAX = 0xDFFF;
	
	public static int combinePair(char high, char low) {
		return (high - SURROGATE1_MIN) * 0x400 + (low - SURROGATE2_MIN) + NONBMP_MIN;
	}
}