New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/routing/joint_segment.hpp

@@ -0,0 +1,80 @@
+#pragma once
+
+#include "routing/route_weight.hpp"
+#include "routing/segment.hpp"
+
+#include "indexer/feature_decl.hpp"
+
+#include <limits>
+#include <string>
+
+namespace routing
+{
+class JointSegment
+{
+public:
+  static auto constexpr kInvalidSegmentId = std::numeric_limits<uint32_t>::max();
+
+  JointSegment() = default;
+  JointSegment(Segment const & from, Segment const & to);
+
+  uint32_t GetFeatureId() const { return m_featureId; }
+  NumMwmId GetMwmId() const { return m_numMwmId; }
+  uint32_t GetStartSegmentId() const { return m_startSegmentId; }
+  uint32_t GetEndSegmentId() const { return m_endSegmentId; }
+  uint32_t GetSegmentId(bool start) const { return start ? m_startSegmentId : m_endSegmentId; }
+  bool IsForward() const { return m_forward; }
+
+  void AssignID(Segment const & seg);
+  void AssignID(JointSegment const & seg);
+
+  static JointSegment MakeFake(uint32_t fakeId, uint32_t featureId = kInvalidFeatureId);
+  bool IsFake() const;
+
+  Segment GetSegment(bool start) const;
+
+  bool operator<(JointSegment const & rhs) const;
+  bool operator==(JointSegment const & rhs) const;
+  bool operator!=(JointSegment const & rhs) const
+  {
+    return !(*this == rhs);
+  }
+
+private:
+  uint32_t m_featureId = kInvalidFeatureId;
+
+  uint32_t m_startSegmentId = kInvalidSegmentId;
+  uint32_t m_endSegmentId = kInvalidSegmentId;
+
+  NumMwmId m_numMwmId = kFakeNumMwmId;
+  bool m_forward = false;
+};
+
+class JointEdge
+{
+public:
+  JointEdge() = default;    // needed for buffer_vector only
+  JointEdge(JointSegment const & target, RouteWeight const & weight)
+    : m_target(target), m_weight(weight) {}
+
+  JointSegment const & GetTarget() const { return m_target; }
+  JointSegment & GetTarget() { return m_target; }
+  RouteWeight & GetWeight() { return m_weight; }
+  RouteWeight const & GetWeight() const { return m_weight; }
+
+private:
+  JointSegment m_target;
+  RouteWeight m_weight;
+};
+
+std::string DebugPrint(JointSegment const & jointSegment);
+}  // namespace routing
+
+namespace std
+{
+template <>
+struct hash<routing::JointSegment>
+{
+  size_t operator()(routing::JointSegment const & jointSegment) const;
+};
+}  // namespace std