/* -*- 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/.

 */

#include <svl/sharedstring.hxx>

namespace svl {

const OUString SharedString::EMPTY_STRING;

const SharedString & SharedString::getEmptyString()

{

    // ref-counting traffic associated with SharedString temporaries can be significant,

    // so use a singleton here, so we can return a const& from getEmptyString.

    // unicode string array for empty string is globally shared in OUString.

    // Let's take advantage of that.

    static const SharedString EMPTY_SHARED_STRING(EMPTY_STRING.pData, EMPTY_STRING.pData);

    return EMPTY_SHARED_STRING;

}

SharedString& SharedString::operator= ( const SharedString& r )

{

    if(this == &r)

        return *this;

    if (mpData)

        rtl_uString_release(mpData);

    if (mpDataIgnoreCase)

        rtl_uString_release(mpDataIgnoreCase);

    mpData = r.mpData;

    mpDataIgnoreCase = r.mpDataIgnoreCase;

    if (mpData)

        rtl_uString_acquire(mpData);

    if (mpDataIgnoreCase)

        rtl_uString_acquire(mpDataIgnoreCase);

    return *this;

}

bool SharedString::operator== ( const SharedString& r ) const

{

    // Compare only the original (not case-folded) string.

    if (mpData == r.mpData)

        return true;

    if (!mpData || !r.mpData)

        return false;

    if (mpData->length != r.mpData->length)

        return false;

    return rtl_ustr_reverseCompare_WithLength(mpData->buffer, mpData->length, r.mpData->buffer, r.mpData->length) == 0;

}

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */