109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
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// Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
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// This file was modified by Oracle on 2014-2020.
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// Modifications copyright (c) 2014-2020, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_COUNTING_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_COUNTING_HPP
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#include <cstddef>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/geometry/core/exterior_ring.hpp>
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#include <boost/geometry/core/interior_rings.hpp>
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#include <boost/geometry/util/range.hpp>
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#include <boost/geometry/algorithms/detail/interior_iterator.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace counting
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{
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template <std::size_t D>
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struct other_count
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{
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template <typename Geometry>
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static inline std::size_t apply(Geometry const&)
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{
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return D;
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}
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template <typename Geometry>
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static inline std::size_t apply(Geometry const&, bool)
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{
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return D;
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}
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};
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template <typename RangeCount>
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struct polygon_count
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{
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template <typename Polygon>
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static inline std::size_t apply(Polygon const& poly)
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{
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std::size_t n = RangeCount::apply(exterior_ring(poly));
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typename interior_return_type<Polygon const>::type
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rings = interior_rings(poly);
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for (typename detail::interior_iterator<Polygon const>::type
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it = boost::begin(rings); it != boost::end(rings); ++it)
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{
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n += RangeCount::apply(*it);
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}
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return n;
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}
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};
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template <typename SingleCount>
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struct multi_count
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{
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template <typename MultiGeometry>
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static inline std::size_t apply(MultiGeometry const& geometry)
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{
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std::size_t n = 0;
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for (typename boost::range_iterator<MultiGeometry const>::type
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it = boost::begin(geometry);
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it != boost::end(geometry);
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++it)
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{
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n += SingleCount::apply(*it);
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}
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return n;
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}
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};
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}} // namespace detail::counting
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_COUNTING_HPP
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