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// Boost.Geometry (aka GGL, Generic Geometry Library) // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands. // Copyright (c) 2008-2014 Bruno Lalande, Paris, France. // Copyright (c) 2009-2014 Mateusz Loskot, London, UK. // This file was modified by Oracle on 2014. // Modifications copyright (c) 2014, Oracle and/or its affiliates. // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. // Use, modification and distribution is subject to the Boost Software License, // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) #ifndef BOOST_GEOMETRY_ALGORITHMS_NUM_INTERIOR_RINGS_HPP #define BOOST_GEOMETRY_ALGORITHMS_NUM_INTERIOR_RINGS_HPP #include <cstddef> #include <boost/range.hpp> #include <boost/variant/apply_visitor.hpp> #include <boost/variant/static_visitor.hpp> #include <boost/variant/variant_fwd.hpp> #include <boost/geometry/core/tag.hpp> #include <boost/geometry/core/tags.hpp> #include <boost/geometry/core/interior_rings.hpp> #include <boost/geometry/algorithms/detail/counting.hpp> #include <boost/geometry/geometries/concepts/check.hpp> namespace boost { namespace geometry { #ifndef DOXYGEN_NO_DISPATCH namespace dispatch { template <typename Geometry, typename Tag = typename tag<Geometry>::type> struct num_interior_rings : detail::counting::other_count<0> {}; template <typename Polygon> struct num_interior_rings<Polygon, polygon_tag> { static inline std::size_t apply(Polygon const& polygon) { return boost::size(geometry::interior_rings(polygon)); } }; template <typename MultiPolygon> struct num_interior_rings<MultiPolygon, multi_polygon_tag> : detail::counting::multi_count < num_interior_rings < typename boost::range_value<MultiPolygon const>::type > > {}; } // namespace dispatch #endif // DOXYGEN_NO_DISPATCH namespace resolve_variant { template <typename Geometry> struct num_interior_rings { static inline std::size_t apply(Geometry const& geometry) { concept::check<Geometry const>(); return dispatch::num_interior_rings<Geometry>::apply(geometry); } }; template <BOOST_VARIANT_ENUM_PARAMS(typename T)> struct num_interior_rings<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> > { struct visitor: boost::static_visitor<std::size_t> { template <typename Geometry> inline std::size_t operator()(Geometry const& geometry) const { return num_interior_rings<Geometry>::apply(geometry); } }; static inline std::size_t apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry) { return boost::apply_visitor(visitor(), geometry); } }; } // namespace resolve_variant /*! \brief \brief_calc{number of interior rings} \ingroup num_interior_rings \details \details_calc{num_interior_rings, number of interior rings}. \tparam Geometry \tparam_geometry \param geometry \param_geometry \return \return_calc{number of interior rings} \qbk{[include reference/algorithms/num_interior_rings.qbk]} \note Defined by OGC as "numInteriorRing". To be consistent with "numPoints" letter "s" is appended */ template <typename Geometry> inline std::size_t num_interior_rings(Geometry const& geometry) { return resolve_variant::num_interior_rings<Geometry>::apply(geometry); } }} // namespace boost::geometry #endif // BOOST_GEOMETRY_ALGORITHMS_NUM_INTERIOR_RINGS_HPP