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/*
 * eXist-db Open Source Native XML Database
 * Copyright (C) 2001 The eXist-db Authors
 *
 * [email protected]
 * http://www.exist-db.org
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.exist.util;

public class XMLCharUtil {

    /**
     * Determines whether a given character codepoint is part of a surrogate pair.
     *
     * A simple optimisation over calling {@code XMLChar.isLowSurrogate(c) || XMLChar.isHighSurrogate(c)}.
     *
     * @param c the character codepoint
     *
     * @return true if the codepoint is part of a surrogate pair, false otherwise
     */
    public static boolean isSurrogate(final char c) {
        return (c & 0xF800) == 0xD800;
    }
}