/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_SAL_RTL_SURROGATES_HXX
#define INCLUDED_SAL_RTL_SURROGATES_HXX

#include <sal/config.h>

#include <sal/types.h>

#define SAL_RTL_FIRST_HIGH_SURROGATE 0xD800
#define SAL_RTL_LAST_HIGH_SURROGATE 0xDBFF
#define SAL_RTL_FIRST_LOW_SURROGATE 0xDC00
#define SAL_RTL_LAST_LOW_SURROGATE 0xDFFF

inline bool isHighSurrogate(sal_uInt32 utf16) {
    return utf16 >= SAL_RTL_FIRST_HIGH_SURROGATE
        && utf16 <= SAL_RTL_LAST_HIGH_SURROGATE;
}

inline bool isLowSurrogate(sal_uInt32 utf16) {
    return utf16 >= SAL_RTL_FIRST_LOW_SURROGATE
        && utf16 <= SAL_RTL_LAST_LOW_SURROGATE;
}

inline sal_uInt32 combineSurrogates(sal_uInt32 high, sal_uInt32 low) {
    return ((high - SAL_RTL_FIRST_HIGH_SURROGATE) << 10)
        + (low - SAL_RTL_FIRST_LOW_SURROGATE) + 0x10000;
}

#endif

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