ceph/src/boost/boost/geometry/algorithms/detail/get_max_size.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2014 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2014 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2014 Mateusz Loskot, London, UK.
   6 // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
   7
   8 // This file was modified by Oracle on 2018.
   9 // Modifications copyright (c) 2018, Oracle and/or its affiliates.
  10
  11 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  12
  13 // Use, modification and distribution is subject to the Boost Software License,
  14 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_GET_MAX_SIZE_HPP
  18 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_GET_MAX_SIZE_HPP
  19
  20 #include <cstddef>
  21
  22 #include <boost/geometry/core/access.hpp>
  23 #include <boost/geometry/core/coordinate_dimension.hpp>
  24 #include <boost/geometry/util/math.hpp>
  25
  26 namespace boost { namespace geometry
  27 {
  28
  29 #ifndef DOXYGEN_NO_DETAIL
  30 namespace detail
  31 {
  32
  33 template <typename Box, std::size_t Dimension>
  34 struct get_max_size_box
  35 {
  36     static inline typename coordinate_type<Box>::type apply(Box const& box)
  37     {
  38         typename coordinate_type<Box>::type s
  39             = geometry::math::abs(geometry::get<1, Dimension>(box) - geometry::get<0, Dimension>(box));
  40
  41         return (std::max)(s, get_max_size_box<Box, Dimension - 1>::apply(box));
  42     }
  43 };
  44
  45 template <typename Box>
  46 struct get_max_size_box<Box, 0>
  47 {
  48     static inline typename coordinate_type<Box>::type apply(Box const& box)
  49     {
  50         return geometry::math::abs(geometry::get<1, 0>(box) - geometry::get<0, 0>(box));
  51     }
  52 };
  53
  54 // This might be implemented later on for other geometries too.
  55 // Not dispatched yet.
  56 template <typename Box>
  57 inline typename coordinate_type<Box>::type get_max_size(Box const& box)
  58 {
  59     return get_max_size_box<Box, dimension<Box>::value - 1>::apply(box);
  60 }
  61
  62 } // namespace detail
  63 #endif // DOXYGEN_NO_DETAIL
  64
  65
  66 }} // namespace boost::geometry
  67
  68
  69 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_GET_MAX_SIZE_HPP