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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_VISIT_INFO_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_VISIT_INFO_HPP
#ifdef BOOST_GEOMETRY_USE_MSM
# include <boost/geometry/algorithms/detail/overlay/msm_state.hpp>
#endif
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace overlay
{
#if ! defined(BOOST_GEOMETRY_USE_MSM)
class visit_info
{
private :
static const int NONE = 0;
static const int STARTED = 1;
static const int VISITED = 2;
static const int FINISHED = 3;
static const int REJECTED = 4;
int m_visit_code;
bool m_rejected;
public:
inline visit_info()
: m_visit_code(0)
, m_rejected(false)
{}
inline void set_visited() { m_visit_code = VISITED; }
inline void set_started() { m_visit_code = STARTED; }
inline void set_finished() { m_visit_code = FINISHED; }
inline void set_rejected()
{
m_visit_code = REJECTED;
m_rejected = true;
}
inline bool none() const { return m_visit_code == NONE; }
inline bool visited() const { return m_visit_code == VISITED; }
inline bool started() const { return m_visit_code == STARTED; }
inline bool finished() const { return m_visit_code == FINISHED; }
inline bool rejected() const { return m_rejected; }
inline void clear()
{
if (! rejected())
{
m_visit_code = NONE;
}
}
#ifdef BOOST_GEOMETRY_DEBUG_INTERSECTION
friend std::ostream& operator<<(std::ostream &os, visit_info const& v)
{
if (v.m_visit_code != 0)
{
os << " VIS: " << int(v.m_visit_code);
}
return os;
}
#endif
};
#else
class visit_info
{
private :
#ifndef USE_MSM_MINI
mutable
#endif
traverse_state state;
public :
inline visit_info()
{
state.start();
}
inline void set_none() { state.process_event(none()); } // Not Yet Implemented!
inline void set_visited() { state.process_event(visit()); }
inline void set_started() { state.process_event(starting()); }
inline void set_finished() { state.process_event(finish()); }
#ifdef USE_MSM_MINI
inline bool none() const { return state.flag_none(); }
inline bool visited() const { return state.flag_visited(); }
inline bool started() const { return state.flag_started(); }
#else
inline bool none() const { return state.is_flag_active<is_init>(); }
inline bool visited() const { return state.is_flag_active<is_visited>(); }
inline bool started() const { return state.is_flag_active<is_started>(); }
#endif
#ifdef BOOST_GEOMETRY_DEBUG_INTERSECTION
friend std::ostream& operator<<(std::ostream &os, visit_info const& v)
{
return os;
}
#endif
};
#endif
}} // namespace detail::overlay
#endif //DOXYGEN_NO_DETAIL
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_VISIT_INFO_HPP
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