intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 47 insertions, 0 deletions

diff --git a/library/cpp/binsaver/blob_io.h b/library/cpp/binsaver/blob_io.h
new file mode 100644
index 00000000000..abe518ef306
--- /dev/null
+++ b/library/cpp/binsaver/blob_io.h
@@ -0,0 +1,47 @@
+#pragma once
+
+#include "bin_saver.h"
+#include "buffered_io.h"
+
+#include <util/memory/blob.h>
+
+class TYaBlobStream: public IBinaryStream {
+    TBlob Blob;
+    i64 Pos;
+
+    int WriteImpl(const void*, int) override {
+        Y_ASSERT(0);
+        return 0;
+    }
+    int ReadImpl(void* userBuffer, int size) override {
+        if (size == 0)
+            return 0;
+        i64 res = Min<i64>(Blob.Length() - Pos, size);
+        if (res)
+            memcpy(userBuffer, ((const char*)Blob.Data()) + Pos, res);
+        Pos += res;
+        return res;
+    }
+    bool IsValid() const override {
+        return true;
+    }
+    bool IsFailed() const override {
+        return false;
+    }
+
+public:
+    TYaBlobStream(const TBlob& blob)
+        : Blob(blob)
+        , Pos(0)
+    {
+    }
+};
+
+template <class T>
+inline void SerializeBlob(const TBlob& data, T& c) {
+    TYaBlobStream f(data);
+    {
+        IBinSaver bs(f, true);
+        bs.Add(1, &c);
+    }
+}