src/tprtree/Index.h

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/******************************************************************************
 * Project:  libspatialindex - A C++ library for spatial indexing
 * Author:   Marios Hadjieleftheriou, mhadji@gmail.com
 ******************************************************************************
 * Copyright (c) 2002, Marios Hadjieleftheriou
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
******************************************************************************/

#pragma once

namespace SpatialIndex
{
    namespace TPRTree
    {
        class Index : public Node
        {
        public:
            ~Index() override;

        private:
            Index(TPRTree* pTree, id_type id, uint32_t level);

            NodePtr chooseSubtree(const MovingRegion& mbr, uint32_t level, std::stack<id_type>& pathBuffer) override;
            NodePtr findLeaf(const MovingRegion& mbr, id_type id, std::stack<id_type>& pathBuffer) override;

            void split(uint32_t dataLength, uint8_t* pData, MovingRegion& mbr, id_type id, NodePtr& left, NodePtr& right) override;

            uint32_t findLeastEnlargement(const MovingRegion&) const;
            uint32_t findLeastOverlap(const MovingRegion&) const;

            void adjustTree(Node*, std::stack<id_type>&);
            void adjustTree(Node*, Node*, std::stack<id_type>&, uint8_t* overflowTable);

            class OverlapEntry
            {
            public:
                uint32_t m_index;
                double m_enlargement;
                MovingRegionPtr m_original;
                MovingRegionPtr m_combined;
                double m_oa;
                double m_ca;

                static int compareEntries(const void* pv1, const void* pv2)
                {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
                    OverlapEntry* pe1 = * (OverlapEntry**) pv1;
                    OverlapEntry* pe2 = * (OverlapEntry**) pv2;
#pragma GCC diagnostic pop
                    if (pe1->m_enlargement < pe2->m_enlargement) return -1;
                    if (pe1->m_enlargement > pe2->m_enlargement) return 1;
                    return 0;
                }
            }; // OverlapEntry

            friend class TPRTree;
            friend class Node;
            friend class BulkLoader;
        }; // Index
    }
}