ceph/src/boost/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 // This file was modified by Oracle on 2016-2020.
  12 // Modifications copyright (c) 2016-2020 Oracle and/or its affiliates.
  13 // Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
  14 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  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_DETAIL_CALCULATE_SUM_HPP
  21 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP
  22
  23 #include <boost/range/begin.hpp>
  24 #include <boost/range/end.hpp>
  25
  26 namespace boost { namespace geometry
  27 {
  28
  29 #ifndef DOXYGEN_NO_DETAIL
  30 namespace detail
  31 {
  32
  33
  34 class calculate_polygon_sum
  35 {
  36     template <typename ReturnType, typename Policy, typename Rings, typename Strategy>
  37     static inline ReturnType sum_interior_rings(Rings const& rings, Strategy const& strategy)
  38     {
  39         ReturnType sum = ReturnType(0);
  40         for (typename boost::range_iterator<Rings const>::type
  41                 it = boost::begin(rings); it != boost::end(rings); ++it)
  42         {
  43             sum += Policy::apply(*it, strategy);
  44         }
  45         return sum;
  46     }
  47
  48 public :
  49     template <typename ReturnType, typename Policy, typename Polygon, typename Strategy>
  50     static inline ReturnType apply(Polygon const& poly, Strategy const& strategy)
  51     {
  52         return Policy::apply(exterior_ring(poly), strategy)
  53             + sum_interior_rings<ReturnType, Policy>(interior_rings(poly), strategy)
  54             ;
  55     }
  56 };
  57
  58
  59 } // namespace detail
  60 #endif // DOXYGEN_NO_DETAIL
  61
  62 }} // namespace boost::geometry
  63
  64 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_SUM_HPP