New cpp folder structure

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

libs/map/gps_track_storage.hpp

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "platform/location.hpp"
+
+#include "base/exception.hpp"
+#include "base/macros.hpp"
+
+#include <fstream>
+#include <functional>
+#include <string>
+#include <vector>
+
+class GpsTrackStorage final
+{
+public:
+  DECLARE_EXCEPTION(OpenException, RootException);
+  DECLARE_EXCEPTION(WriteException, RootException);
+  DECLARE_EXCEPTION(ReadException, RootException);
+
+  using TItem = location::GpsInfo;
+
+  /// Opens storage with track data.
+  /// @param filePath - path to the file on disk
+  /// @exception OpenException if seek fails.
+  GpsTrackStorage(std::string const & filePath);
+
+  /// Appends new point to the storage
+  /// @param items - collection of gps track points.
+  /// @exceptions WriteException if write fails or ReadException if read fails.
+  void Append(std::vector<TItem> const & items);
+
+  /// Removes all data from the storage
+  /// @exceptions WriteException if write fails.
+  void Clear();
+
+  /// Reads the storage and calls functor for each item
+  /// @param fn - callable function, return true to stop ForEach
+  /// @exceptions ReadException if read fails.
+  void ForEach(std::function<bool(TItem const & item)> const & fn);
+
+private:
+  DISALLOW_COPY_AND_MOVE(GpsTrackStorage);
+
+  size_t GetFirstItemIndex() const;
+
+  std::string const m_filePath;
+  std::fstream m_stream;
+  size_t m_itemCount;
+};