ceph/src/boost/libs/geometry/include/boost/geometry/algorithms/num_interior_rings.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
   6
   7 // This file was modified by Oracle on 2014.
   8 // Modifications copyright (c) 2014, Oracle and/or its affiliates.
   9
  10 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  11 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
  12
  13 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  14 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  15
  16 // Use, modification and distribution is subject to the Boost Software License,
  17 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  18 // http://www.boost.org/LICENSE_1_0.txt)
  19
  20 #ifndef BOOST_GEOMETRY_ALGORITHMS_NUM_INTERIOR_RINGS_HPP
  21 #define BOOST_GEOMETRY_ALGORITHMS_NUM_INTERIOR_RINGS_HPP
  22
  23 #include <cstddef>
  24
  25 #include <boost/range.hpp>
  26
  27 #include <boost/variant/apply_visitor.hpp>
  28 #include <boost/variant/static_visitor.hpp>
  29 #include <boost/variant/variant_fwd.hpp>
  30
  31 #include <boost/geometry/core/tag.hpp>
  32 #include <boost/geometry/core/tags.hpp>
  33
  34 #include <boost/geometry/core/interior_rings.hpp>
  35
  36 #include <boost/geometry/algorithms/detail/counting.hpp>
  37
  38 #include <boost/geometry/geometries/concepts/check.hpp>
  39
  40
  41 namespace boost { namespace geometry
  42 {
  43
  44 #ifndef DOXYGEN_NO_DISPATCH
  45 namespace dispatch
  46 {
  47
  48
  49 template <typename Geometry, typename Tag = typename tag<Geometry>::type>
  50 struct num_interior_rings
  51     : detail::counting::other_count<0>
  52 {};
  53
  54
  55
  56 template <typename Polygon>
  57 struct num_interior_rings<Polygon, polygon_tag>
  58 {
  59     static inline std::size_t apply(Polygon const& polygon)
  60     {
  61         return boost::size(geometry::interior_rings(polygon));
  62     }
  63
  64 };
  65
  66
  67 template <typename MultiPolygon>
  68 struct num_interior_rings<MultiPolygon, multi_polygon_tag>
  69     : detail::counting::multi_count
  70         <
  71             num_interior_rings
  72                 <
  73                     typename boost::range_value<MultiPolygon const>::type
  74                 >
  75         >
  76 {};
  77
  78
  79 } // namespace dispatch
  80 #endif // DOXYGEN_NO_DISPATCH
  81
  82
  83 namespace resolve_variant
  84 {
  85
  86 template <typename Geometry>
  87 struct num_interior_rings
  88 {
  89     static inline std::size_t apply(Geometry const& geometry)
  90     {
  91         concepts::check<Geometry const>();
  92
  93         return dispatch::num_interior_rings<Geometry>::apply(geometry);
  94     }
  95 };
  96
  97 template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
  98 struct num_interior_rings<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
  99 {
 100     struct visitor: boost::static_visitor<std::size_t>
 101     {
 102         template <typename Geometry>
 103         inline std::size_t operator()(Geometry const& geometry) const
 104         {
 105             return num_interior_rings<Geometry>::apply(geometry);
 106         }
 107     };
 108
 109     static inline std::size_t
 110     apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
 111     {
 112         return boost::apply_visitor(visitor(), geometry);
 113     }
 114 };
 115
 116 } // namespace resolve_variant
 117
 118
 119 /*!
 120 \brief \brief_calc{number of interior rings}
 121 \ingroup num_interior_rings
 122 \details \details_calc{num_interior_rings, number of interior rings}.
 123 \tparam Geometry \tparam_geometry
 124 \param geometry \param_geometry
 125 \return \return_calc{number of interior rings}
 126
 127 \qbk{[include reference/algorithms/num_interior_rings.qbk]}
 128
 129 \note Defined by OGC as "numInteriorRing". To be consistent with "numPoints"
 130     letter "s" is appended
 131 */
 132 template <typename Geometry>
 133 inline std::size_t num_interior_rings(Geometry const& geometry)
 134 {
 135     return resolve_variant::num_interior_rings<Geometry>::apply(geometry);
 136 }
 137
 138
 139 }} // namespace boost::geometry
 140
 141
 142 #endif // BOOST_GEOMETRY_ALGORITHMS_NUM_INTERIOR_RINGS_HPP