intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 38 insertions, 0 deletions

diff --git a/library/cpp/codecs/zstd_dict_codec.h b/library/cpp/codecs/zstd_dict_codec.h
new file mode 100644
index 0000000000..59c1ad6c60
--- /dev/null
+++ b/library/cpp/codecs/zstd_dict_codec.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include "codecs.h"
+
+#include <util/generic/ptr.h>
+
+namespace NCodecs {
+    // benchmarks are here: https://st.yandex-team.ru/SEARCH-1655
+
+    class TZStdDictCodec: public ICodec {
+        class TImpl;
+        TIntrusivePtr<TImpl> Impl;
+
+    public:
+        explicit TZStdDictCodec(ui32 comprLevel = 1);
+        ~TZStdDictCodec() override;
+
+        static TStringBuf MyName() {
+            return "zstd08d";
+        }
+
+        TString GetName() const override;
+
+        ui8 Encode(TStringBuf in, TBuffer& out) const override;
+
+        void Decode(TStringBuf in, TBuffer& out) const override;
+
+        static TVector<TString> ListCompressionNames();
+        static int ParseCompressionName(TStringBuf);
+
+    protected:
+        void DoLearn(ISequenceReader& in) override;
+        bool DoTryToLearn(ISequenceReader& in) final;
+        void Save(IOutputStream* out) const override;
+        void Load(IInputStream* in) override;
+    };
+
+}