sharedstring.cxx

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/* -*- 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)
    {
        if (!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;
    }
 
    return !r.mpData;
}
 
}
 
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