/*
 * Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
 *           (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
 *
 * This file is part of lsp-lltl-lib
 * Created on: 17 авг. 2020 г.
 *
 * lsp-lltl-lib 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 3 of the License, or
 * any later version.
 *
 * lsp-lltl-lib 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 lsp-lltl-lib. If not, see <https://www.gnu.org/licenses/>.
 */

#include <lsp-plug.in/lltl/iterator.h>

namespace lsp
{
    namespace lltl
    {
        raw_iterator *raw_iterator::reference(raw_iterator *src)
        {
            if (src == NULL)
                return NULL;
            ++src->refs;
            return src;
        }

        raw_iterator *raw_iterator::dereference(raw_iterator *src)
        {
            if (src != NULL)
            {
                if ((--src->refs) <= 0)
                    ::free(src);
            }

            return NULL;
        }

        raw_iterator *raw_iterator::replace(raw_iterator *xold, raw_iterator *xnew)
        {
            if (xold == xnew)
                return xold;

            raw_iterator *ref = reference(xnew);
            dereference(xold);
            return ref;
        }
    }
}
