ceph/src/boost/libs/geometry/include/boost/geometry/algorithms/detail/overlay/visit_info.hpp

   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_VISIT_INFO_HPP
  10 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_VISIT_INFO_HPP
  11
  12
  13 namespace boost { namespace geometry
  14 {
  15
  16 #ifndef DOXYGEN_NO_DETAIL
  17 namespace detail { namespace overlay
  18 {
  19
  20 class visit_info
  21 {
  22 private :
  23     static const int NONE = 0;
  24     static const int STARTED = 1;
  25     static const int VISITED = 2;
  26     static const int FINISHED = 3;
  27     static const int REJECTED = 4;
  28
  29     int m_visit_code;
  30     bool m_rejected;
  31     bool m_final;
  32
  33 public:
  34     inline visit_info()
  35         : m_visit_code(0)
  36         , m_rejected(false)
  37         , m_final(false)
  38     {}
  39
  40     inline void set_visited() { m_visit_code = VISITED; }
  41     inline void set_started() { m_visit_code = STARTED; }
  42     inline void set_finished() { m_visit_code = FINISHED; }
  43     inline void set_rejected()
  44     {
  45         m_visit_code = REJECTED;
  46         m_rejected = true;
  47     }
  48
  49     inline bool none() const { return m_visit_code == NONE; }
  50     inline bool visited() const { return m_visit_code == VISITED; }
  51     inline bool started() const { return m_visit_code == STARTED; }
  52     inline bool finished() const { return m_visit_code == FINISHED; }
  53     inline bool rejected() const { return m_rejected; }
  54     inline bool finalized() const { return m_final; }
  55
  56     inline void clear()
  57     {
  58         if (! m_rejected && ! m_final)
  59         {
  60             m_visit_code = NONE;
  61         }
  62     }
  63
  64     inline void reset()
  65     {
  66         *this = visit_info();
  67     }
  68
  69     inline void finalize()
  70     {
  71         if (visited() || started() || finished() )
  72         {
  73             m_final = true;
  74         }
  75     }
  76
  77 #ifdef BOOST_GEOMETRY_DEBUG_INTERSECTION
  78     friend std::ostream& operator<<(std::ostream &os, visit_info const& v)
  79     {
  80         if (v.m_visit_code != 0)
  81         {
  82             os << " VIS: " << int(v.m_visit_code);
  83         }
  84         return os;
  85     }
  86 #endif
  87
  88 };
  89
  90
  91 }} // namespace detail::overlay
  92 #endif //DOXYGEN_NO_DETAIL
  93
  94
  95 }} // namespace boost::geometry
  96
  97
  98 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_VISIT_INFO_HPP