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155 lines
6.7 KiB
C++
155 lines
6.7 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) 2015 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 MAPNIK_GEOMETRY_WKT_GENERATOR_HPP
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#define MAPNIK_GEOMETRY_WKT_GENERATOR_HPP
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// mapnik
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#include <mapnik/global.hpp>
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#include <mapnik/geometry.hpp>
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#include <mapnik/geometry_type.hpp>
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#include <mapnik/geometry_fusion_adapted.hpp>
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// boost
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#pragma GCC diagnostic ignored "-Wunused-local-typedef"
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#include <boost/spirit/include/karma.hpp>
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#include <boost/spirit/include/phoenix_function.hpp>
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#include <boost/math/special_functions/trunc.hpp> // for vc++ and android whose c++11 libs lack std::trunc
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#include <boost/spirit/home/karma/domain.hpp>
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#pragma GCC diagnostic pop
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namespace mapnik { namespace wkt {
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namespace karma = boost::spirit::karma;
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namespace phoenix = boost::phoenix;
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namespace detail {
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template <typename Geometry>
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struct get_type
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{
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using result_type = mapnik::geometry::geometry_types;
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template <typename T>
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result_type operator() (T const& geom) const
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{
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auto type = mapnik::geometry::geometry_type(geom);
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return type;
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}
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};
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template <typename T>
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struct wkt_coordinate_policy : karma::real_policies<T>
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{
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using base_type = boost::spirit::karma::real_policies<T>;
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static int floatfield(T) { return base_type::fmtflags::fixed; }
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static unsigned precision(T n)
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{
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if (n == 0.0) return 0;
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using namespace boost::spirit;
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return static_cast<unsigned>(14 - boost::math::trunc(log10(traits::get_absolute_value(n))));
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}
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template <typename OutputIterator>
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static bool dot(OutputIterator& sink, T n, unsigned precision)
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{
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if (n == 0) return true;
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return base_type::dot(sink, n, precision);
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}
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template <typename OutputIterator>
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static bool fraction_part(OutputIterator& sink, T n
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, unsigned adjprec, unsigned precision)
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{
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if (n == 0) return true;
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return base_type::fraction_part(sink, n, adjprec, precision);
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}
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};
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}
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template <typename OutputIterator, typename Geometry, typename T>
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struct wkt_generator_grammar :
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karma::grammar<OutputIterator, Geometry const& ()>
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{
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wkt_generator_grammar();
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// rules
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karma::rule<OutputIterator, Geometry const&()> geometry;
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karma::rule<OutputIterator, karma::locals<mapnik::geometry::geometry_types>, Geometry const&() > geometry_dispatch;
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karma::rule<OutputIterator, geometry::geometry<T> const&()> point;
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karma::rule<OutputIterator, geometry::point<T> const&()> point_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const&()> linestring;
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karma::rule<OutputIterator, geometry::line_string<T> const&()> linestring_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const&()> polygon;
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karma::rule<OutputIterator, geometry::polygon<T> const&()> polygon_coord;
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karma::rule<OutputIterator, geometry::linear_ring<T> const&()> exterior_ring_coord;
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karma::rule<OutputIterator, std::vector<geometry::linear_ring<T> > const&()> interior_ring_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> multi_point;
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karma::rule<OutputIterator, geometry::multi_point<T> const& ()> multi_point_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> multi_linestring;
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karma::rule<OutputIterator, geometry::multi_line_string<T> const& ()> multi_linestring_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> multi_polygon;
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karma::rule<OutputIterator, geometry::multi_polygon<T> const& ()> multi_polygon_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> geometry_collection;
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karma::rule<OutputIterator, geometry::geometry_collection<T> const& ()> geometries;
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boost::phoenix::function<detail::get_type<Geometry> > geometry_type;
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karma::symbols<mapnik::geometry::geometry_types, char const*> empty;
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//
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karma::real_generator<T, detail::wkt_coordinate_policy<T> > coordinate;
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};
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template <typename OutputIterator, typename Geometry, typename T>
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struct wkt_generator_grammar_int :
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karma::grammar<OutputIterator, Geometry const& ()>
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{
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wkt_generator_grammar_int();
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// rules
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karma::rule<OutputIterator, Geometry const&()> geometry;
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karma::rule<OutputIterator, karma::locals<mapnik::geometry::geometry_types>, Geometry const&() > geometry_dispatch;
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karma::rule<OutputIterator, geometry::geometry<T> const&()> point;
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karma::rule<OutputIterator, geometry::point<T> const&()> point_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const&()> linestring;
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karma::rule<OutputIterator, geometry::line_string<T> const&()> linestring_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const&()> polygon;
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karma::rule<OutputIterator, geometry::polygon<T> const&()> polygon_coord;
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karma::rule<OutputIterator, geometry::linear_ring<T> const&()> exterior_ring_coord;
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karma::rule<OutputIterator, std::vector<geometry::linear_ring<T> > const&()> interior_ring_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> multi_point;
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karma::rule<OutputIterator, geometry::multi_point<T> const& ()> multi_point_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> multi_linestring;
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karma::rule<OutputIterator, geometry::multi_line_string<T> const& ()> multi_linestring_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> multi_polygon;
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karma::rule<OutputIterator, geometry::multi_polygon<T> const& ()> multi_polygon_coord;
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karma::rule<OutputIterator, geometry::geometry<T> const& ()> geometry_collection;
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karma::rule<OutputIterator, geometry::geometry_collection<T> const& ()> geometries;
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boost::phoenix::function<detail::get_type<Geometry> > geometry_type;
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karma::symbols<mapnik::geometry::geometry_types, char const*> empty;
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//
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karma::int_generator<T> coordinate;
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};
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}}
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#endif // MAPNIK_GEOMETRY_WKT_GENERATOR_HPP
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