Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@101: // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
Chris@101: // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
Chris@101: // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
Chris@101: // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
Chris@101: 
Chris@101: // This file was modified by Oracle on 2014.
Chris@101: // Modifications copyright (c) 2014, Oracle and/or its affiliates.
Chris@101: 
Chris@101: // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
Chris@16: 
Chris@16: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@16: // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_ALGORITHMS_NUM_POINTS_HPP
Chris@16: #define BOOST_GEOMETRY_ALGORITHMS_NUM_POINTS_HPP
Chris@16: 
Chris@16: #include <cstddef>
Chris@16: 
Chris@101: #include <boost/mpl/size_t.hpp>
Chris@101: 
Chris@16: #include <boost/range.hpp>
Chris@101: 
Chris@101: #include <boost/variant/apply_visitor.hpp>
Chris@101: #include <boost/variant/static_visitor.hpp>
Chris@101: #include <boost/variant/variant_fwd.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/core/closure.hpp>
Chris@101: #include <boost/geometry/core/coordinate_dimension.hpp>
Chris@16: #include <boost/geometry/core/tag_cast.hpp>
Chris@101: #include <boost/geometry/core/tags.hpp>
Chris@101: 
Chris@16: #include <boost/geometry/algorithms/not_implemented.hpp>
Chris@101: 
Chris@101: #include <boost/geometry/algorithms/detail/counting.hpp>
Chris@101: 
Chris@16: #include <boost/geometry/geometries/concepts/check.hpp>
Chris@16: 
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: // Silence warning C4127: conditional expression is constant
Chris@16: #if defined(_MSC_VER)
Chris@101: #pragma warning(push)
Chris@16: #pragma warning(disable : 4127)
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DETAIL
Chris@16: namespace detail { namespace num_points
Chris@16: {
Chris@16: 
Chris@16: 
Chris@101: template <bool AddForOpen>
Chris@16: struct range_count
Chris@16: {
Chris@16:     template <typename Range>
Chris@101:     static inline std::size_t apply(Range const& range)
Chris@16:     {
Chris@16:         std::size_t n = boost::size(range);
Chris@101:         if (AddForOpen
Chris@101:             && n > 0
Chris@101:             && geometry::closure<Range>::value == open
Chris@101:             )
Chris@16:         {
Chris@101:             return n + 1;
Chris@16:         }
Chris@16:         return n;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: }} // namespace detail::num_points
Chris@16: #endif // DOXYGEN_NO_DETAIL
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DISPATCH
Chris@16: namespace dispatch
Chris@16: {
Chris@16: 
Chris@16: template
Chris@16: <
Chris@16:     typename Geometry,
Chris@101:     bool AddForOpen,
Chris@101:     typename Tag = typename tag_cast
Chris@101:         <
Chris@101:             typename tag<Geometry>::type, multi_tag
Chris@101:         >::type
Chris@16: >
Chris@16: struct num_points: not_implemented<Tag>
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, point_tag>
Chris@101:     : detail::counting::other_count<1>
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, box_tag>
Chris@101:     : detail::counting::other_count<(1 << geometry::dimension<Geometry>::value)>
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, segment_tag>
Chris@101:     : detail::counting::other_count<2>
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, linestring_tag>
Chris@101:     : detail::num_points::range_count<AddForOpen>
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, ring_tag>
Chris@101:     : detail::num_points::range_count<AddForOpen>
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, polygon_tag>
Chris@101:     : detail::counting::polygon_count
Chris@101:         <
Chris@101:             detail::num_points::range_count<AddForOpen>
Chris@101:         >
Chris@16: {};
Chris@16: 
Chris@101: template <typename Geometry, bool AddForOpen>
Chris@101: struct num_points<Geometry, AddForOpen, multi_tag>
Chris@101:     : detail::counting::multi_count
Chris@101:         <
Chris@101:             num_points<typename boost::range_value<Geometry>::type, AddForOpen>
Chris@101:         >
Chris@101: {};
Chris@101: 
Chris@101: } // namespace dispatch
Chris@101: #endif
Chris@101: 
Chris@101: 
Chris@101: namespace resolve_variant
Chris@101: {
Chris@101: 
Chris@16: template <typename Geometry>
Chris@101: struct num_points
Chris@16: {
Chris@16:     static inline std::size_t apply(Geometry const& geometry,
Chris@16:                                     bool add_for_open)
Chris@16:     {
Chris@101:         concept::check<Geometry const>();
Chris@101: 
Chris@101:         return add_for_open
Chris@101:             ? dispatch::num_points<Geometry, true>::apply(geometry)
Chris@101:             : dispatch::num_points<Geometry, false>::apply(geometry);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
Chris@101: struct num_points<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
Chris@16: {
Chris@16:     struct visitor: boost::static_visitor<std::size_t>
Chris@16:     {
Chris@16:         bool m_add_for_open;
Chris@16: 
Chris@16:         visitor(bool add_for_open): m_add_for_open(add_for_open) {}
Chris@16: 
Chris@16:         template <typename Geometry>
Chris@101:         inline std::size_t operator()(Geometry const& geometry) const
Chris@16:         {
Chris@101:             return num_points<Geometry>::apply(geometry, m_add_for_open);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     static inline std::size_t
Chris@16:     apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry,
Chris@16:           bool add_for_open)
Chris@16:     {
Chris@16:         return boost::apply_visitor(visitor(add_for_open), geometry);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@101: } // namespace resolve_variant
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief \brief_calc{number of points}
Chris@16: \ingroup num_points
Chris@16: \details \details_calc{num_points, number of points}.
Chris@16: \tparam Geometry \tparam_geometry
Chris@16: \param geometry \param_geometry
Chris@16: \param add_for_open add one for open geometries (i.e. polygon types which are not closed)
Chris@16: \return \return_calc{number of points}
Chris@16: 
Chris@16: \qbk{[include reference/algorithms/num_points.qbk]}
Chris@16: */
Chris@16: template <typename Geometry>
Chris@16: inline std::size_t num_points(Geometry const& geometry, bool add_for_open = false)
Chris@16: {
Chris@101:     return resolve_variant::num_points<Geometry>::apply(geometry, add_for_open);
Chris@16: }
Chris@16: 
Chris@16: #if defined(_MSC_VER)
Chris@16: #pragma warning(pop)
Chris@16: #endif
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_ALGORITHMS_NUM_POINTS_HPP