LinkedItemList.h

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/****
 * LinkedItemList.h
 *
 * Copyright 2019 mikee47 <mike@sillyhouse.net>
 *
 * This file is part of the Sming UPnP Library
 *
 * This library is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, version 3 or later.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this library.
 * If not, see <https://www.gnu.org/licenses/>.
 *
 ****/
 
#pragma once
 
#include "LinkedItem.h"
 
namespace UPnP
{
class LinkedItemList
{
public:
    bool add(LinkedItem* item);
 
    bool add(const LinkedItem* item)
    {
        return add(const_cast<LinkedItem*>(item));
    }
 
    bool remove(LinkedItem* item);
 
    void clear()
    {
        head_ = nullptr;
    }
 
    LinkedItem* head()
    {
        return head_;
    }
 
    const LinkedItem* head() const
    {
        return head_;
    }
 
    LinkedItem* find(LinkedItem* item)
    {
        auto p = head_;
        while(p != nullptr && p != item) {
            p = p->getNext();
        }
        return p;
    }
 
    const LinkedItem* find(LinkedItem* item) const
    {
        return const_cast<LinkedItemList*>(this)->find(item);
    }
 
    bool contains(LinkedItem* item) const
    {
        return find(item) != nullptr;
    }
 
private:
    LinkedItem* head_{nullptr};
};
 
} // namespace UPnP