MonotoneChainBuilder.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: index/chain/MonotoneChainBuilder.java r388 (JTS-1.12)
 *
 **********************************************************************/

#ifndef GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
#define GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H

#include <geos/export.h>
#include <memory>
#include <vector>
#include <cstddef>

// Forward declarations
namespace geos {
namespace geom {
class CoordinateSequence;
}
namespace index {
namespace chain {
class MonotoneChain;
}
}
}

namespace geos {
namespace index { // geos::index
namespace chain { // geos::index::chain

class GEOS_DLL MonotoneChainBuilder {

public:

    MonotoneChainBuilder() {}

    static std::unique_ptr<std::vector<std::unique_ptr<MonotoneChain>>> getChains(
        const geom::CoordinateSequence* pts,
        void* context);

    static void getChains(const geom::CoordinateSequence* pts,
                          void* context,
                          std::vector<std::unique_ptr<MonotoneChain>>& mcList);

    static std::unique_ptr<std::vector<std::unique_ptr<MonotoneChain>>>
    getChains(const geom::CoordinateSequence* pts)
    {
        return getChains(pts, nullptr);
    }

    MonotoneChainBuilder(const MonotoneChainBuilder&) = delete;
    MonotoneChainBuilder& operator=(const MonotoneChainBuilder&) = delete;


private:

    static std::size_t findChainEnd(const geom::CoordinateSequence& pts,
                                    std::size_t start);
};

} // namespace geos::index::chain
} // namespace geos::index
} // namespace geos

#endif // GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H