Factor out 'CodingParams' to separate module.

1 files changed, 46 insertions, 0 deletions

diff --git a/indexer/coding_params.hpp b/indexer/coding_params.hpp
new file mode 100644
index 0000000000..6f0264cf03
--- /dev/null
+++ b/indexer/coding_params.hpp
@@ -0,0 +1,46 @@
+#pragma once
+#include "../geometry/point2d.hpp"
+
+#include "../coding/varint.hpp"
+
+
+namespace serial
+{
+  class CodingParams
+  {
+  public:
+    // TODO: Factor out?
+    CodingParams();
+    CodingParams(uint8_t coordBits, m2::PointD const & pt);
+    CodingParams(uint8_t coordBits, uint64_t basePointUint64);
+
+    m2::PointU GetBasePointPrediction(uint64_t offset) const;
+
+    // TODO: Factor out.
+    m2::PointU GetBasePoint() const { return m_BasePoint; }
+    // TODO: Factor out.
+    int64_t GetBasePointInt64() const { return static_cast<int64_t>(m_BasePointUint64); }
+
+    uint32_t GetCoordBits() const { return m_CoordBits; }
+
+    template <typename WriterT> void Save(WriterT & writer) const
+    {
+      WriteVarUint(writer, GetCoordBits());
+      WriteVarUint(writer, static_cast<uint64_t>(GetBasePointInt64()));
+    }
+
+    template <typename SourceT> void Load(SourceT & src)
+    {
+      uint32_t const coordBits = ReadVarUint<uint32_t>(src);
+      ASSERT_LESS(coordBits, 32, ());
+      uint64_t const basePointUint64 = ReadVarUint<uint64_t>(src);
+      *this = CodingParams(coordBits, basePointUint64);
+    }
+
+  private:
+    uint64_t m_BasePointUint64;
+    // TODO: Factor out.
+    m2::PointU m_BasePoint;
+    uint8_t m_CoordBits;
+  };
+}