New cpp folder structure

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

tools/poly_borders/borders_data.hpp

@@ -0,0 +1,74 @@
+#pragma once
+
+#include "poly_borders/help_structures.hpp"
+
+#include "base/control_flow.hpp"
+
+#include <map>
+#include <string>
+#include <vector>
+
+namespace poly_borders
+{
+/// \note All methods of this class are not thread-safe except |MarkPoint()| method.
+class BordersData
+{
+public:
+  inline static double const kEqualityEpsilon = 1.0E-7;
+  inline static std::string const kBorderExtension = ".poly";
+
+  void Init(std::string const & bordersDir);
+
+  void RemoveEmptySpaceBetweenBorders();
+
+  void DumpPolyFiles(std::string const & targetDir);
+  Polygon const & GetBordersPolygonByName(std::string const & name) const;
+  void PrintDiff();
+
+private:
+  /// \brief Some polygons can have sequentially same points - duplicates. This method removes such
+  /// points and leaves only unique.
+  size_t RemoveDuplicatePoints();
+
+  template <class PointsT> static size_t RemoveDuplicatingPointImpl(PointsT & points)
+  {
+    auto const equalFn = [](auto const & p1, auto const & p2)
+    {
+      return p1.EqualDxDy(p2, kEqualityEpsilon);
+    };
+
+    auto const last = std::unique(points.begin(), points.end(), equalFn);
+    size_t count = std::distance(last, points.end());
+    points.erase(last, points.end());
+
+    while (points.size() > 1 && equalFn(points.front(), points.back()))
+    {
+      ++count;
+      points.pop_back();
+    }
+
+    return count;
+  }
+
+  /// \brief Checks whether we can replace points from segment: [curLeftPointId, curRightPointId]
+  /// of |curBorderId| to points from another border in order to get rid of empty space
+  /// between curBorder and anotherBorder.
+  base::ControlFlow TryToReplace(size_t curBorderId, size_t & curLeftPointId,
+                                 size_t curRightPointId);
+
+  bool HasLinkAt(size_t curBorderId, size_t pointId);
+
+  /// \brief Replace points using |Polygon::ReplaceData| that is filled by
+  /// |RemoveEmptySpaceBetweenBorders()|.
+  void DoReplace();
+
+  size_t m_removedPointsCount = 0;
+  size_t m_duplicatedPointsCount = 0;
+  std::map<size_t, double> m_additionalAreaMetersSqr;
+
+  std::map<std::string, size_t> m_polyFileNameToIndex;
+  std::map<size_t, std::string> m_indexToPolyFileName;
+  std::vector<Polygon> m_bordersPolygons;
+  std::vector<Polygon> m_prevCopy;
+};
+}  // namespace poly_borders