144 lines
2.7 KiB
C++
144 lines
2.7 KiB
C++
// Boost.Geometry
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// This file was modified by Oracle on 2018, 2019.
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// Modifications copyright (c) 2018, 2019, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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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_SRS_PROJECTIONS_GRIDS_HPP
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#define BOOST_GEOMETRY_SRS_PROJECTIONS_GRIDS_HPP
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#include <boost/geometry/srs/projections/impl/pj_gridinfo.hpp>
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#include <fstream>
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namespace boost { namespace geometry
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{
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namespace projections { namespace detail
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{
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struct grids_tag {};
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struct shared_grids_tag {};
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}} // namespace projections::detail
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namespace srs
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{
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class grids
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{
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public:
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std::size_t size() const
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{
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return gridinfo.size();
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}
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bool empty() const
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{
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return gridinfo.empty();
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}
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typedef projections::detail::grids_tag tag;
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projections::detail::pj_gridinfo gridinfo;
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};
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struct ifstream_policy
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{
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typedef std::ifstream stream_type;
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static inline void open(stream_type & is, std::string const& gridname)
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{
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is.open(gridname.c_str(), std::ios::binary);
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}
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};
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template
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<
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typename StreamPolicy = srs::ifstream_policy,
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typename Grids = grids
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>
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struct grids_storage
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{
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typedef StreamPolicy stream_policy_type;
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typedef Grids grids_type;
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grids_storage()
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{}
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explicit grids_storage(stream_policy_type const& policy)
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: stream_policy(policy)
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{}
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stream_policy_type stream_policy;
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grids_type hgrids;
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};
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template <typename GridsStorage = grids_storage<> >
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class projection_grids
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{
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public:
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projection_grids(GridsStorage & storage)
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: m_storage_ptr(boost::addressof(storage))
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{}
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typedef GridsStorage grids_storage_type;
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GridsStorage & grids_storage() const
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{
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return *m_storage_ptr;
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}
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private:
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GridsStorage * const m_storage_ptr;
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public:
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std::vector<std::size_t> hindexes;
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};
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template <typename GridsStorage = grids_storage<> >
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struct transformation_grids
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{
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explicit transformation_grids(GridsStorage & storage)
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: src_grids(storage)
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, dst_grids(storage)
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{}
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projection_grids<GridsStorage> src_grids;
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projection_grids<GridsStorage> dst_grids;
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};
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namespace detail
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{
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struct empty_grids_storage {};
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struct empty_projection_grids {};
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} // namespace detail
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template <>
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struct transformation_grids<detail::empty_grids_storage>
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{
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detail::empty_projection_grids src_grids;
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detail::empty_projection_grids dst_grids;
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};
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}}} // namespace boost::geometry::srs
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#endif // BOOST_GEOMETRY_SRS_PROJECTIONS_GRIDS_HPP
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