boost/geometry/srs/projections/impl/factory_entry.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // This file was modified by Oracle on 2017, 2018, 2019.
   6 // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
   7 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   8
   9 // Use, modification and distribution is subject to the Boost Software License,
  10 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  11 // http://www.boost.org/LICENSE_1_0.txt)
  12
  13 #ifndef BOOST_GEOMETRY_PROJECTIONS_IMPL_FACTORY_ENTRY_HPP
  14 #define BOOST_GEOMETRY_PROJECTIONS_IMPL_FACTORY_ENTRY_HPP
  15
  16 #include <string>
  17
  18 #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
  19
  20 namespace boost { namespace geometry { namespace projections
  21 {
  22
  23 namespace detail
  24 {
  25
  26 // forward declaration needed by some projections
  27 template <typename Params, typename CT, typename Parameters>
  28 class factory;
  29
  30 template <typename Params, typename CT, typename Parameters>
  31 struct factory_entry
  32 {
  33     virtual ~factory_entry() {}
  34     virtual dynamic_wrapper_b<CT, Parameters>* create_new(Params const& , Parameters const& ) const = 0;
  35 };
  36
  37 // Macros for entries definition
  38
  39 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_BEGIN(ENTRY) \
  40 template <typename Params, typename T, typename Parameters> \
  41 struct ENTRY : projections::detail::factory_entry<Params, T, Parameters> \
  42 { \
  43     projections::detail::dynamic_wrapper_b<T, Parameters>* create_new(Params const& params, \
  44                                                                       Parameters const& parameters) const
  45
  46 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_END };
  47
  48 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_F(ENTRY, PROJ) \
  49 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_BEGIN(ENTRY) \
  50 { \
  51     return new projections::detail::dynamic_wrapper_f<PROJ<T, Parameters>, T, Parameters>(params, parameters); \
  52 } \
  53 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_END
  54
  55 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(ENTRY, PROJ) \
  56 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_BEGIN(ENTRY) \
  57 { \
  58     return new projections::detail::dynamic_wrapper_fi<PROJ<T, Parameters>, T, Parameters>(params, parameters); \
  59 } \
  60 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_END
  61
  62 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI2(ENTRY, PROJ_S, PROJ_E) \
  63 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_BEGIN(ENTRY) \
  64 { \
  65     if (parameters.es != 0.0) \
  66         return new projections::detail::dynamic_wrapper_fi<PROJ_E<T, Parameters>, T, Parameters>(params, parameters); \
  67     else \
  68         return new projections::detail::dynamic_wrapper_fi<PROJ_S<T, Parameters>, T, Parameters>(params, parameters); \
  69 } \
  70 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_END
  71
  72 // Macros for factory initialization
  73 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(FUN_NAME) \
  74 template <typename Params, typename T, typename Parameters> \
  75 inline void FUN_NAME(projections::detail::factory<Params, T, Parameters>& factory)
  76
  77 #define BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(PROJ_NAME, ENTRY) \
  78     factory.add_to_factory(#PROJ_NAME, \
  79                            srs::dpar::proj_##PROJ_NAME, \
  80                            new ENTRY<Params, T, Parameters>);
  81
  82 } // namespace detail
  83 }}} // namespace boost::geometry::projections
  84
  85 #endif // BOOST_GEOMETRY_PROJECTIONS_IMPL_FACTORY_ENTRY_HPP