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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. | |
4 | // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
5 | // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. | |
6 | ||
7 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library | |
8 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
9 | ||
10 | // Use, modification and distribution is subject to the Boost Software License, | |
11 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
12 | // http://www.boost.org/LICENSE_1_0.txt) | |
13 | ||
14 | #ifndef BOOST_GEOMETRY_GEOMETRIES_ADAPTED_C_ARRAY_HPP | |
15 | #define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_C_ARRAY_HPP | |
16 | ||
17 | #include <cstddef> | |
18 | ||
19 | #include <boost/type_traits/is_arithmetic.hpp> | |
20 | ||
21 | #include <boost/geometry/core/access.hpp> | |
22 | #include <boost/geometry/core/cs.hpp> | |
23 | #include <boost/geometry/core/coordinate_dimension.hpp> | |
24 | #include <boost/geometry/core/coordinate_type.hpp> | |
25 | #include <boost/geometry/core/tags.hpp> | |
26 | ||
27 | namespace boost { namespace geometry | |
28 | { | |
29 | ||
30 | ||
31 | #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS | |
32 | namespace traits | |
33 | { | |
34 | ||
35 | ||
36 | #ifndef DOXYGEN_NO_DETAIL | |
37 | namespace detail | |
38 | { | |
39 | ||
40 | ||
41 | // Create class and specialization to indicate the tag | |
42 | // for normal cases and the case that the type of the c-array is arithmetic | |
43 | template <bool> | |
44 | struct c_array_tag | |
45 | { | |
46 | typedef geometry_not_recognized_tag type; | |
47 | }; | |
48 | ||
49 | ||
50 | template <> | |
51 | struct c_array_tag<true> | |
52 | { | |
53 | typedef point_tag type; | |
54 | }; | |
55 | ||
56 | ||
57 | } // namespace detail | |
58 | #endif // DOXYGEN_NO_DETAIL | |
59 | ||
60 | ||
61 | // Assign the point-tag, preventing arrays of points getting a point-tag | |
62 | template <typename CoordinateType, std::size_t DimensionCount> | |
63 | struct tag<CoordinateType[DimensionCount]> | |
64 | : detail::c_array_tag<boost::is_arithmetic<CoordinateType>::value> {}; | |
65 | ||
66 | ||
67 | template <typename CoordinateType, std::size_t DimensionCount> | |
68 | struct coordinate_type<CoordinateType[DimensionCount]> | |
69 | { | |
70 | typedef CoordinateType type; | |
71 | }; | |
72 | ||
73 | ||
74 | template <typename CoordinateType, std::size_t DimensionCount> | |
75 | struct dimension<CoordinateType[DimensionCount]>: boost::mpl::int_<DimensionCount> {}; | |
76 | ||
77 | ||
78 | template <typename CoordinateType, std::size_t DimensionCount, std::size_t Dimension> | |
79 | struct access<CoordinateType[DimensionCount], Dimension> | |
80 | { | |
81 | static inline CoordinateType get(CoordinateType const p[DimensionCount]) | |
82 | { | |
83 | return p[Dimension]; | |
84 | } | |
85 | ||
86 | static inline void set(CoordinateType p[DimensionCount], | |
87 | CoordinateType const& value) | |
88 | { | |
89 | p[Dimension] = value; | |
90 | } | |
91 | }; | |
92 | ||
93 | ||
94 | } // namespace traits | |
95 | #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS | |
96 | ||
97 | ||
98 | }} // namespace boost::geometry | |
99 | ||
100 | ||
101 | #define BOOST_GEOMETRY_REGISTER_C_ARRAY_CS(CoordinateSystem) \ | |
102 | namespace boost { namespace geometry { namespace traits { \ | |
103 | template <typename T, std::size_t N> \ | |
104 | struct coordinate_system<T[N]> \ | |
105 | { \ | |
106 | typedef CoordinateSystem type; \ | |
107 | }; \ | |
108 | }}} | |
109 | ||
110 | ||
111 | #endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_C_ARRAY_HPP |