New cpp folder structure

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

libs/routing/turn_candidate.hpp

@@ -0,0 +1,79 @@
+#pragma once
+
+#include "routing/segment.hpp"
+#include "routing/turns.hpp"
+
+#include "base/math.hpp"
+
+#include <vector>
+
+namespace ftypes
+{
+enum class HighwayClass;
+}
+
+namespace routing
+{
+namespace turns
+{
+/// \brief The TurnCandidate struct contains information about possible ways from a junction.
+struct TurnCandidate
+{
+
+  /// |m_angle| is the angle of the turn in degrees. It means the angle is 180 minus
+  /// the angle between the current edge and the edge of the candidate. A counterclockwise rotation.
+  /// The current edge is an edge which belongs to the route and is located before the junction.
+  /// |m_angle| belongs to the range [-180; 180];
+  double m_angle;
+
+  /// |m_segment| is the first segment of a possible way from the junction.
+  Segment m_segment;
+
+  /// \brief |highwayClass| field for the road class caching. Because feature reading is
+  /// a time-consuming function.
+  ftypes::HighwayClass m_highwayClass;
+
+  /// If |isLink| is true then the turn candidate is a link.
+  bool m_isLink;
+
+  TurnCandidate(double angle, Segment const & segment, ftypes::HighwayClass c, bool isLink)
+    : m_angle(angle), m_segment(segment), m_highwayClass(c), m_isLink(isLink)
+  {
+  }
+
+  bool IsAlmostEqual(TurnCandidate const & rhs) const
+  {
+    double constexpr kEpsilon = 0.01;
+    return AlmostEqualAbs(m_angle, rhs.m_angle, kEpsilon) && m_segment == rhs.m_segment &&
+           m_highwayClass == rhs.m_highwayClass && m_isLink == rhs.m_isLink;
+  }
+};
+
+inline bool IsAlmostEqual(std::vector<TurnCandidate> const & lhs, std::vector<TurnCandidate> const & rhs)
+{
+  if (lhs.size() != rhs.size())
+    return false;
+
+  for (size_t i = 0; i < lhs.size(); ++i)
+  {
+    if (!lhs[i].IsAlmostEqual(rhs[i]))
+      return false;
+  }
+  return true;
+}
+
+struct TurnCandidates
+{
+  std::vector<TurnCandidate> candidates;
+  bool isCandidatesAngleValid;
+
+  explicit TurnCandidates(bool angleValid = true) : isCandidatesAngleValid(angleValid) {}
+
+  bool IsAlmostEqual(TurnCandidates const & rhs) const
+  {
+    return turns::IsAlmostEqual(candidates, rhs.candidates) &&
+           isCandidatesAngleValid == rhs.isCandidatesAngleValid;
+  }
+};
+}  // namespace routing
+}  // namespace turns