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1// Boost.Geometry (aka GGL, Generic Geometry Library)
2
3// Copyright (c) 2014-2015, Oracle and/or its affiliates.
4
5// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
6// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
7
8// Licensed under the Boost Software License version 1.0.
9// http://www.boost.org/users/license.html
10
11#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_HAS_INVALID_COORDINATE_HPP
12#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_HAS_INVALID_COORDINATE_HPP
13
14#include <cstddef>
15
16#include <boost/type_traits/is_floating_point.hpp>
17
18#include <boost/geometry/core/coordinate_type.hpp>
19#include <boost/geometry/core/point_type.hpp>
20
21#include <boost/geometry/util/has_non_finite_coordinate.hpp>
22
23#include <boost/geometry/iterators/point_iterator.hpp>
24#include <boost/geometry/views/detail/indexed_point_view.hpp>
25#include <boost/geometry/algorithms/detail/check_iterator_range.hpp>
26
27
28namespace boost { namespace geometry
29{
30
31#ifndef DOXYGEN_NO_DETAIL
32namespace detail { namespace is_valid
33{
34
35struct always_valid
36{
37 template <typename Geometry, typename VisitPolicy>
38 static inline bool apply(Geometry const&, VisitPolicy& visitor)
39 {
40 return ! visitor.template apply<no_failure>();
41 }
42};
43
44struct point_has_invalid_coordinate
45{
46 template <typename Point, typename VisitPolicy>
47 static inline bool apply(Point const& point, VisitPolicy& visitor)
48 {
49 boost::ignore_unused(visitor);
50
51 return
52 geometry::has_non_finite_coordinate(point)
53 ?
54 (! visitor.template apply<failure_invalid_coordinate>())
55 :
56 (! visitor.template apply<no_failure>());
57 }
58
59 template <typename Point>
60 static inline bool apply(Point const& point)
61 {
62 return geometry::has_non_finite_coordinate(point);
63 }
64};
65
66struct indexed_has_invalid_coordinate
67{
68 template <typename Geometry, typename VisitPolicy>
69 static inline bool apply(Geometry const& geometry, VisitPolicy& visitor)
70 {
71 geometry::detail::indexed_point_view<Geometry const, 0> p0(geometry);
72 geometry::detail::indexed_point_view<Geometry const, 1> p1(geometry);
73
74 return point_has_invalid_coordinate::apply(p0, visitor)
75 || point_has_invalid_coordinate::apply(p1, visitor);
76 }
77};
78
79
80struct range_has_invalid_coordinate
81{
82 struct point_has_valid_coordinates
83 {
84 template <typename Point>
85 static inline bool apply(Point const& point)
86 {
87 return ! point_has_invalid_coordinate::apply(point);
88 }
89 };
90
91 template <typename Geometry, typename VisitPolicy>
92 static inline bool apply(Geometry const& geometry, VisitPolicy& visitor)
93 {
94 boost::ignore_unused(visitor);
95
96 bool const has_valid_coordinates = detail::check_iterator_range
97 <
98 point_has_valid_coordinates,
99 true // do not consider an empty range as problematic
100 >::apply(geometry::points_begin(geometry),
101 geometry::points_end(geometry));
102
103 return has_valid_coordinates
104 ?
105 (! visitor.template apply<no_failure>())
106 :
107 (! visitor.template apply<failure_invalid_coordinate>());
108 }
109};
110
111
112template
113<
114 typename Geometry,
115 typename Tag = typename tag<Geometry>::type,
116 bool HasFloatingPointCoordinates = boost::is_floating_point
117 <
118 typename coordinate_type<Geometry>::type
119 >::value
120>
121struct has_invalid_coordinate
122 : range_has_invalid_coordinate
123{};
124
125template <typename Geometry, typename Tag>
126struct has_invalid_coordinate<Geometry, Tag, false>
127 : always_valid
128{};
129
130template <typename Point>
131struct has_invalid_coordinate<Point, point_tag, true>
132 : point_has_invalid_coordinate
133{};
134
135template <typename Segment>
136struct has_invalid_coordinate<Segment, segment_tag, true>
137 : indexed_has_invalid_coordinate
138{};
139
140template <typename Box>
141struct has_invalid_coordinate<Box, box_tag, true>
142 : indexed_has_invalid_coordinate
143{};
144
145
146}} // namespace detail::is_valid
147#endif // DOXYGEN_NO_DETAIL
148
149}} // namespace boost::geometry
150
151#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_HAS_INVALID_COORDINATE_HPP