Repo created

libs/indexer/altitude_loader.hpp

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+#pragma once
+#include "indexer/feature_altitude.hpp"
+
+#include "coding/memory_region.hpp"
+
+#include "geometry/point_with_altitude.hpp"
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "3party/succinct/elias_fano.hpp"
+#include "3party/succinct/rs_bit_vector.hpp"
+
+class MwmValue;
+
+namespace feature
+{
+class AltitudeLoaderBase
+{
+public:
+  explicit AltitudeLoaderBase(MwmValue const & mwmValue);
+
+  /// \returns altitude of feature with |featureId|. All items of the returned vector are valid
+  /// or the returned vector is empty.
+  geometry::Altitudes GetAltitudes(uint32_t featureId, size_t pointCount);
+
+  bool HasAltitudes() const;
+
+private:
+  std::unique_ptr<CopiedMemoryRegion> m_altitudeAvailabilityRegion;
+  std::unique_ptr<CopiedMemoryRegion> m_featureTableRegion;
+
+  succinct::rs_bit_vector m_altitudeAvailability;
+  succinct::elias_fano m_featureTable;
+
+  std::unique_ptr<FilesContainerR::TReader> m_reader;
+  AltitudeHeader m_header;
+  std::string m_countryFileName;
+};
+
+class AltitudeLoaderCached : public AltitudeLoaderBase
+{
+public:
+  explicit AltitudeLoaderCached(MwmValue const & mwmValue) : AltitudeLoaderBase(mwmValue) {}
+
+  /// \returns altitude of feature with |featureId|. All items of the returned vector are valid
+  /// or the returned vector is empty.
+  geometry::Altitudes const & GetAltitudes(uint32_t featureId, size_t pointCount);
+
+  void ClearCache() { m_cache.clear(); }
+
+private:
+  std::map<uint32_t, geometry::Altitudes> m_cache;
+};
+}  // namespace feature