64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2016 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef GEOJSON_INDEX_FEATURESET_HPP
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#define GEOJSON_INDEX_FEATURESET_HPP
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#include "geojson_datasource.hpp"
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#include <mapnik/feature.hpp>
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#include <mapnik/geom_util.hpp>
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#if defined(MAPNIK_MEMORY_MAPPED_FILE)
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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#include <boost/interprocess/mapped_region.hpp>
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#include <boost/interprocess/streams/bufferstream.hpp>
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#pragma GCC diagnostic pop
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#include <mapnik/mapped_memory_cache.hpp>
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#endif
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#include <deque>
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#include <cstdio>
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class geojson_index_featureset : public mapnik::Featureset
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{
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using value_type = std::pair<std::size_t, std::size_t>;
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public:
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geojson_index_featureset(std::string const& filename, mapnik::filter_in_box const& filter);
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virtual ~geojson_index_featureset();
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mapnik::feature_ptr next();
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private:
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#if defined (MAPNIK_MEMORY_MAPPED_FILE)
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using file_source_type = boost::interprocess::ibufferstream;
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mapnik::mapped_region_ptr mapped_region_;
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#else
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using file_ptr = std::unique_ptr<std::FILE, int (*)(std::FILE *)>;
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file_ptr file_;
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#endif
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mapnik::value_integer feature_id_ = 1;
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mapnik::context_ptr ctx_;
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std::vector<value_type> positions_;
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std::vector<value_type>::iterator itr_;
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};
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#endif // GEOJSON_INDEX_FEATURESE_HPP
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