1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2 
3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
4 
5 // Use, modification and distribution is subject to the Boost Software License,
6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
7 // http://www.boost.org/LICENSE_1_0.txt)
8 
9 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
10 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
11 
12 
13 #if defined(BOOST_GEOMETRY_DEBUG_OVERLAY)
14 #  define BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER
15 #endif
16 
17 #if defined(BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER)
18 #include <iostream>
19 #endif
20 
21 
22 #include <boost/geometry/algorithms/detail/signed_size_type.hpp>
23 
24 
25 namespace boost { namespace geometry
26 {
27 
28 
29 
30 // Internal struct to uniquely identify a segment
31 // on a linestring,ring
32 // or polygon (needs ring_index)
33 // or multi-geometry (needs multi_index)
34 struct segment_identifier
35 {
segment_identifierboost::geometry::segment_identifier36     inline segment_identifier()
37         : source_index(-1)
38         , multi_index(-1)
39         , ring_index(-1)
40         , segment_index(-1)
41         , piece_index(-1)
42     {}
43 
segment_identifierboost::geometry::segment_identifier44     inline segment_identifier(signed_size_type src,
45                               signed_size_type mul,
46                               signed_size_type rin,
47                               signed_size_type seg)
48         : source_index(src)
49         , multi_index(mul)
50         , ring_index(rin)
51         , segment_index(seg)
52         , piece_index(-1)
53     {}
54 
operator <boost::geometry::segment_identifier55     inline bool operator<(segment_identifier const& other) const
56     {
57         return source_index != other.source_index ? source_index < other.source_index
58             : multi_index !=other.multi_index ? multi_index < other.multi_index
59             : ring_index != other.ring_index ? ring_index < other.ring_index
60             : segment_index < other.segment_index
61             ;
62     }
63 
operator ==boost::geometry::segment_identifier64     inline bool operator==(segment_identifier const& other) const
65     {
66         return source_index == other.source_index
67             && segment_index == other.segment_index
68             && ring_index == other.ring_index
69             && multi_index == other.multi_index
70             ;
71     }
72 
73 #if defined(BOOST_GEOMETRY_DEBUG_SEGMENT_IDENTIFIER)
operator <<(std::ostream & os,segment_identifier const & seg_id)74     friend std::ostream& operator<<(std::ostream &os, segment_identifier const& seg_id)
75     {
76         os
77             << "s:" << seg_id.source_index
78             << ", v:" << seg_id.segment_index // v:vertex because s is used for source
79             ;
80         if (seg_id.ring_index >= 0) os << ", r:" << seg_id.ring_index;
81         if (seg_id.multi_index >= 0) os << ", m:" << seg_id.multi_index;
82         return os;
83     }
84 #endif
85 
86     signed_size_type source_index;
87     signed_size_type multi_index;
88     signed_size_type ring_index;
89     signed_size_type segment_index;
90 
91     // For buffer - todo: move this to buffer-only
92     signed_size_type piece_index;
93 };
94 
95 
96 
97 }} // namespace boost::geometry
98 
99 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_SEGMENT_IDENTIFIER_HPP
100