ceph/src/boost/libs/geometry/include/boost/geometry/algorithms/detail/calculate_sum.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
   6 // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
   7
   8 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
   9 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  10
  11 // Use, modification and distribution is subject to the Boost Software License,
  12 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  13 // http://www.boost.org/LICENSE_1_0.txt)
  14
  15 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP
  16 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP
  17
  18 #include <boost/range.hpp>
  19
  20 namespace boost { namespace geometry
  21 {
  22
  23 #ifndef DOXYGEN_NO_DETAIL
  24 namespace detail
  25 {
  26
  27
  28 class calculate_polygon_sum
  29 {
  30     template <typename ReturnType, typename Policy, typename Rings, typename Strategy>
  31     static inline ReturnType sum_interior_rings(Rings const& rings, Strategy const& strategy)
  32     {
  33         ReturnType sum = ReturnType();
  34         for (typename boost::range_iterator<Rings const>::type
  35                 it = boost::begin(rings); it != boost::end(rings); ++it)
  36         {
  37             sum += Policy::apply(*it, strategy);
  38         }
  39         return sum;
  40     }
  41
  42 public :
  43     template <typename ReturnType, typename Policy, typename Polygon, typename Strategy>
  44     static inline ReturnType apply(Polygon const& poly, Strategy const& strategy)
  45     {
  46         return Policy::apply(exterior_ring(poly), strategy)
  47             + sum_interior_rings<ReturnType, Policy>(interior_rings(poly), strategy)
  48             ;
  49     }
  50 };
  51
  52
  53 } // namespace detail
  54 #endif // DOXYGEN_NO_DETAIL
  55
  56 }} // namespace boost::geometry
  57
  58 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP