New cpp folder structure

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

libs/routing/checkpoints.cpp

@@ -0,0 +1,65 @@
+#include "routing/checkpoints.hpp"
+
+#include "geometry/mercator.hpp"
+
+#include "base/assert.hpp"
+
+#include <iomanip>
+#include <sstream>
+
+namespace routing
+{
+Checkpoints::Checkpoints(std::vector<m2::PointD> && points) : m_points(std::move(points))
+{
+  CHECK_GREATER_OR_EQUAL(m_points.size(), 2,
+                         ("Checkpoints should at least contain start and finish"));
+}
+
+void Checkpoints::SetPointFrom(m2::PointD const & point)
+{
+  ASSERT_LESS(m_passedIdx, m_points.size(), ());
+  m_points[m_passedIdx] = point;
+}
+
+m2::PointD const & Checkpoints::GetPoint(size_t pointIdx) const
+{
+  ASSERT_LESS(pointIdx, m_points.size(), ());
+  return m_points[pointIdx];
+}
+
+m2::PointD const & Checkpoints::GetPointFrom() const
+{
+  CHECK(!IsFinished(), ());
+  return GetPoint(m_passedIdx);
+}
+
+m2::PointD const & Checkpoints::GetPointTo() const
+{
+  CHECK(!IsFinished(), ());
+  return GetPoint(m_passedIdx + 1);
+}
+
+void Checkpoints::PassNextPoint()
+{
+  CHECK(!IsFinished(), ());
+  ++m_passedIdx;
+}
+double Checkpoints::GetSummaryLengthBetweenPointsMeters() const
+{
+  double dist = 0.0;
+  for (size_t i = 1; i < m_points.size(); ++i)
+    dist += mercator::DistanceOnEarth(m_points[i - 1], m_points[i]);
+
+  return dist;
+}
+
+std::string DebugPrint(Checkpoints const & checkpoints)
+{
+  std::ostringstream out;
+  out << "Checkpoints(";
+  for (auto const & pt : checkpoints.GetPoints())
+    out << DebugPrint(mercator::ToLatLon(pt)) << "; ";
+  out << "passed: " << checkpoints.GetPassedIdx() << ")";
+  return out.str();
+}
+}  // namespace routing