intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 83 insertions, 0 deletions

diff --git a/library/cpp/yson/parser.h b/library/cpp/yson/parser.h
new file mode 100644
index 00000000000..dce35a8cd40
--- /dev/null
+++ b/library/cpp/yson/parser.h
@@ -0,0 +1,83 @@
+#pragma once
+
+#include "public.h"
+
+#include <util/generic/maybe.h>
+#include <util/generic/ptr.h>
+
+class IInputStream;
+
+namespace NYT::NYson {
+struct IYsonConsumer;
+} // namespace NYT::NYson
+
+namespace NYson {
+    ////////////////////////////////////////////////////////////////////////////////
+
+    class TYsonParser {
+    public:
+        TYsonParser(
+            NYT::NYson::IYsonConsumer* consumer,
+            IInputStream* stream,
+            EYsonType type = ::NYson::EYsonType::Node,
+            bool enableLinePositionInfo = false,
+            TMaybe<ui64> memoryLimit = Nothing());
+
+        ~TYsonParser();
+
+        void Parse();
+
+    private:
+        class TImpl;
+        THolder<TImpl> Impl;
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////
+
+    class TStatelessYsonParser {
+    public:
+        TStatelessYsonParser(
+            NYT::NYson::IYsonConsumer* consumer,
+            bool enableLinePositionInfo = false,
+            TMaybe<ui64> memoryLimit = Nothing());
+
+        ~TStatelessYsonParser();
+
+        void Parse(const TStringBuf& data, EYsonType type = ::NYson::EYsonType::Node);
+
+    private:
+        class TImpl;
+        THolder<TImpl> Impl;
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////
+
+    class TYsonListParser {
+    public:
+        TYsonListParser(
+            NYT::NYson::IYsonConsumer* consumer,
+            IInputStream* stream,
+            bool enableLinePositionInfo = false,
+            TMaybe<ui64> memoryLimit = Nothing());
+
+        ~TYsonListParser();
+
+        bool Parse(); // Returns false, if there is no more list items
+
+    private:
+        class TImpl;
+        THolder<TImpl> Impl;
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////
+
+    void ParseYsonStringBuffer(
+        const TStringBuf& buffer,
+        NYT::NYson::IYsonConsumer* consumer,
+        EYsonType type = ::NYson::EYsonType::Node,
+        bool enableLinePositionInfo = false,
+        TMaybe<ui64> memoryLimit = Nothing());
+
+    ////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYson