1 files changed, 99 insertions, 0 deletions
diff --git a/core/include/fpdfapi/cpdf_stream.h b/core/include/fpdfapi/cpdf_stream.h
new file mode 100644
index 0000000000..fd3b8c0047
--- /dev/null
+++ b/core/include/fpdfapi/cpdf_stream.h
@@ -0,0 +1,99 @@
+// Copyright 2016 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_INCLUDE_FPDFAPI_CPDF_STREAM_H_
+#define CORE_INCLUDE_FPDFAPI_CPDF_STREAM_H_
+
+#include "core/include/fpdfapi/cpdf_object.h"
+#include "core/include/fxcrt/fx_stream.h"
+
+class CPDF_Stream : public CPDF_Object {
+ public:
+  CPDF_Stream(uint8_t* pData, FX_DWORD size, CPDF_Dictionary* pDict);
+
+  // CPDF_Object.
+  Type GetType() const override;
+  CPDF_Object* Clone(FX_BOOL bDirect = FALSE) const override;
+  CPDF_Dictionary* GetDict() const override;
+  CFX_WideString GetUnicodeText() const override;
+  bool IsStream() const override;
+  CPDF_Stream* AsStream() override;
+  const CPDF_Stream* AsStream() const override;
+
+  FX_DWORD GetRawSize() const { return m_dwSize; }
+  uint8_t* GetRawData() const { return m_pDataBuf; }
+
+  void SetData(const uint8_t* pData,
+               FX_DWORD size,
+               FX_BOOL bCompressed,
+               FX_BOOL bKeepBuf);
+
+  void InitStream(uint8_t* pData, FX_DWORD size, CPDF_Dictionary* pDict);
+  void InitStreamFromFile(IFX_FileRead* pFile, CPDF_Dictionary* pDict);
+
+  FX_BOOL ReadRawData(FX_FILESIZE start_pos,
+                      uint8_t* pBuf,
+                      FX_DWORD buf_size) const;
+
+  bool IsMemoryBased() const { return m_GenNum == kMemoryBasedGenNum; }
+
+ protected:
+  static const FX_DWORD kMemoryBasedGenNum = (FX_DWORD)-1;
+
+  ~CPDF_Stream() override;
+
+  void InitStreamInternal(CPDF_Dictionary* pDict);
+
+  CPDF_Dictionary* m_pDict;
+  FX_DWORD m_dwSize;
+  FX_DWORD m_GenNum;
+
+  union {
+    uint8_t* m_pDataBuf;
+    IFX_FileRead* m_pFile;
+  };
+};
+
+inline CPDF_Stream* ToStream(CPDF_Object* obj) {
+  return obj ? obj->AsStream() : nullptr;
+}
+
+inline const CPDF_Stream* ToStream(const CPDF_Object* obj) {
+  return obj ? obj->AsStream() : nullptr;
+}
+
+class CPDF_StreamAcc {
+ public:
+  CPDF_StreamAcc();
+  ~CPDF_StreamAcc();
+
+  void LoadAllData(const CPDF_Stream* pStream,
+                   FX_BOOL bRawAccess = FALSE,
+                   FX_DWORD estimated_size = 0,
+                   FX_BOOL bImageAcc = FALSE);
+
+  const CPDF_Stream* GetStream() const { return m_pStream; }
+  CPDF_Dictionary* GetDict() const {
+    return m_pStream ? m_pStream->GetDict() : nullptr;
+  }
+  const uint8_t* GetData() const;
+  FX_DWORD GetSize() const;
+  const CFX_ByteString& GetImageDecoder() const { return m_ImageDecoder; }
+  const CPDF_Dictionary* GetImageParam() const { return m_pImageParam; }
+
+  uint8_t* DetachData();
+
+ protected:
+  uint8_t* m_pData;
+  FX_DWORD m_dwSize;
+  FX_BOOL m_bNewBuf;
+  CFX_ByteString m_ImageDecoder;
+  CPDF_Dictionary* m_pImageParam;
+  const CPDF_Stream* m_pStream;
+  uint8_t* m_pSrcData;
+};
+
+#endif  // CORE_INCLUDE_FPDFAPI_CPDF_STREAM_H_