1 files changed, 33 insertions, 0 deletions
diff --git a/core/fxcodec/codec/cfx_codec_memory.h b/core/fxcodec/codec/cfx_codec_memory.h
new file mode 100644
index 0000000000..6eee72a32d
--- /dev/null
+++ b/core/fxcodec/codec/cfx_codec_memory.h
@@ -0,0 +1,33 @@
+// Copyright 2018 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CORE_FXCODEC_CODEC_CFX_CODEC_MEMORY_H_
+#define CORE_FXCODEC_CODEC_CFX_CODEC_MEMORY_H_
+
+#include "core/fxcrt/retain_ptr.h"
+
+class CFX_CodecMemory : public Retainable {
+ public:
+  template <typename T, typename... Args>
+  friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
+
+  uint8_t* GetBuffer() { return buffer_; }
+  size_t GetSize() const { return size_; }
+  size_t GetPosition() const { return pos_; }
+  bool IsEOF() const { return pos_ >= size_; }
+  size_t ReadBlock(void* buffer, size_t size);
+
+  // Sets the cursor position to |pos| if possible.
+  bool Seek(size_t pos);
+
+ private:
+  CFX_CodecMemory(uint8_t* buffer, size_t size);
+  ~CFX_CodecMemory() override;
+
+  uint8_t* const buffer_;
+  const size_t size_;
+  size_t pos_ = 0;
+};
+
+#endif  // CORE_FXCODEC_CODEC_CFX_CODEC_MEMORY_H_