Moved mwm_traits from search to platform.

1 files changed, 53 insertions, 0 deletions

diff --git a/platform/mwm_traits.hpp b/platform/mwm_traits.hpp
new file mode 100644
index 0000000000..8f559018b8
--- /dev/null
+++ b/platform/mwm_traits.hpp
@@ -0,0 +1,53 @@
+#pragma once
+
+#include "platform/mwm_version.hpp"
+
+#include "std/string.hpp"
+
+namespace version
+{
+// This is a wrapper around mwm's version.  Allows users to get
+// information about versions of some data structures in mwm.
+class MwmTraits
+{
+public:
+  enum class SearchIndexFormat
+  {
+    // A list of features with their ranks and centers
+    // is stored behind every node of the search trie.
+    // This format corresponds to ValueList<FeatureWithRankAndCenter>.
+    FeaturesWithRankAndCenter,
+
+    // A compressed bit vector of feature indices is
+    // stored behind every node of the search trie.
+    // This format corresponds to ValueList<FeatureIndexValue>.
+    CompressedBitVector,
+  };
+
+  enum class HouseToStreetTableFormat
+  {
+    // An array of elements where i-th element is an index of a street
+    // in a vector returned by ReverseGeocoder::GetNearbyStreets() for
+    // the i-th feature.  Each element normally fits into 3 bits, but
+    // there can be exceptions, and these exceptions are stored in a
+    // separate table. See ReverseGeocoder and FixedBitsDDVector for
+    // details.
+    Fixed3BitsDDVector,
+
+    // The format of relation is unknown. Most likely, an error has occured.
+    Unknown
+  };
+
+  MwmTraits(version::Format versionFormat);
+
+  SearchIndexFormat GetSearchIndexFormat() const;
+
+  HouseToStreetTableFormat GetHouseToStreetTableFormat() const;
+
+private:
+  version::Format m_versionFormat;
+};
+
+string DebugPrint(MwmTraits::SearchIndexFormat format);
+string DebugPrint(MwmTraits::HouseToStreetTableFormat format);
+}  // namespace version