1 files changed, 52 insertions, 0 deletions
diff --git a/core/fxcrt/cfx_binarybuf.h b/core/fxcrt/cfx_binarybuf.h
new file mode 100644
index 0000000000..3081d02902
--- /dev/null
+++ b/core/fxcrt/cfx_binarybuf.h
@@ -0,0 +1,52 @@
+// Copyright 2017 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.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FXCRT_CFX_BINARYBUF_H_
+#define CORE_FXCRT_CFX_BINARYBUF_H_
+
+#include <memory>
+
+#include "core/fxcrt/fx_memory.h"
+#include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/fx_system.h"
+
+class CFX_BinaryBuf {
+ public:
+  CFX_BinaryBuf();
+  explicit CFX_BinaryBuf(FX_STRSIZE size);
+  ~CFX_BinaryBuf();
+
+  uint8_t* GetBuffer() const { return m_pBuffer.get(); }
+  FX_STRSIZE GetSize() const { return m_DataSize; }
+
+  void Clear();
+  void EstimateSize(FX_STRSIZE size, FX_STRSIZE alloc_step = 0);
+  void AppendBlock(const void* pBuf, FX_STRSIZE size);
+  void AppendString(const CFX_ByteString& str) {
+    AppendBlock(str.c_str(), str.GetLength());
+  }
+
+  void AppendByte(uint8_t byte) {
+    ExpandBuf(1);
+    m_pBuffer.get()[m_DataSize++] = byte;
+  }
+
+  void InsertBlock(FX_STRSIZE pos, const void* pBuf, FX_STRSIZE size);
+  void Delete(FX_STRSIZE start_index, FX_STRSIZE count);
+
+  // Releases ownership of |m_pBuffer| and returns it.
+  std::unique_ptr<uint8_t, FxFreeDeleter> DetachBuffer();
+
+ protected:
+  void ExpandBuf(FX_STRSIZE size);
+
+  FX_STRSIZE m_AllocStep;
+  FX_STRSIZE m_AllocSize;
+  FX_STRSIZE m_DataSize;
+  std::unique_ptr<uint8_t, FxFreeDeleter> m_pBuffer;
+};
+
+#endif  // CORE_FXCRT_CFX_BINARYBUF_H_