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diff --git a/sfntly/data/memory_byte_array.h b/sfntly/data/memory_byte_array.h
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+++ b/sfntly/data/memory_byte_array.h
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+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SFNTLY_CPP_SRC_SFNTLY_DATA_MEMORY_BYTE_ARRAY_H_
+#define SFNTLY_CPP_SRC_SFNTLY_DATA_MEMORY_BYTE_ARRAY_H_
+
+#include "sfntly/data/byte_array.h"
+
+namespace sfntly {
+
+class MemoryByteArray : public ByteArray, public RefCounted<MemoryByteArray> {
+ public:
+  // Construct a new MemoryByteArray with a new array of the size given. It is
+  // assumed that none of the array is filled and readable.
+  explicit MemoryByteArray(int32_t length);
+
+  // Note: not implemented due to dangerous operations in constructor.
+  //explicit MemoryByteArray(ByteVector* b);
+
+  // Construct a new MemoryByteArray using byte array.
+  // @param b the byte array that provides the actual storage
+  // @param filled_length the index of the last byte in the array has data
+  // Note: This is different from Java version, it does not take over the
+  //       ownership of b.  Caller is responsible for handling the lifetime
+  //       of b.  C++ port also assumes filled_length is buffer_length since
+  //       there is not a reliable way to identify the actual size of buffer.
+  MemoryByteArray(byte_t* b, int32_t filled_length);
+
+  virtual ~MemoryByteArray();
+  virtual int32_t CopyTo(OutputStream* os, int32_t offset, int32_t length);
+
+  // Make gcc -Woverloaded-virtual happy.
+  virtual int32_t CopyTo(ByteArray* array) { return ByteArray::CopyTo(array); }
+  virtual int32_t CopyTo(ByteArray* array, int32_t offset, int32_t length) {
+    return ByteArray::CopyTo(array, offset, length);
+  }
+  virtual int32_t CopyTo(int32_t dst_offset,
+                         ByteArray* array,
+                         int32_t src_offset,
+                         int32_t length) {
+    return ByteArray::CopyTo(dst_offset, array, src_offset, length);
+  }
+  virtual int32_t CopyTo(OutputStream* os) { return ByteArray::CopyTo(os); }
+
+ protected:
+  virtual void InternalPut(int32_t index, byte_t b);
+  virtual int32_t InternalPut(int32_t index,
+                              byte_t* b,
+                              int32_t offset,
+                              int32_t length);
+  virtual byte_t InternalGet(int32_t index);
+  virtual int32_t InternalGet(int32_t index,
+                              byte_t* b,
+                              int32_t offset,
+                              int32_t length);
+  virtual void Close();
+  virtual byte_t* Begin();
+
+ private:
+  void Init();  // C++ port only, used to allocate memory outside constructor.
+
+  byte_t* b_;
+  bool allocated_;
+};
+
+}  // namespace sfntly
+
+#endif  // SFNTLY_CPP_SRC_SFNTLY_DATA_MEMORY_BYTE_ARRAY_H_