1 files changed, 48 insertions, 0 deletions
diff --git a/core/fpdfapi/fpdf_parser/cpdf_indirect_object_holder.h b/core/fpdfapi/fpdf_parser/cpdf_indirect_object_holder.h
new file mode 100644
index 0000000000..414f4eeb07
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+++ b/core/fpdfapi/fpdf_parser/cpdf_indirect_object_holder.h
@@ -0,0 +1,48 @@
+// 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_FPDFAPI_FPDF_PARSER_CPDF_INDIRECT_OBJECT_HOLDER_H_
+#define CORE_FPDFAPI_FPDF_PARSER_CPDF_INDIRECT_OBJECT_HOLDER_H_
+
+#include <map>
+#include <memory>
+
+#include "core/fxcrt/include/fx_system.h"
+
+class CPDF_Object;
+
+class CPDF_IndirectObjectHolder {
+ public:
+  using const_iterator =
+      std::map<uint32_t, std::unique_ptr<CPDF_Object>>::const_iterator;
+
+  CPDF_IndirectObjectHolder();
+  virtual ~CPDF_IndirectObjectHolder();
+
+  CPDF_Object* GetIndirectObject(uint32_t objnum) const;
+  CPDF_Object* GetOrParseIndirectObject(uint32_t objnum);
+  void ReleaseIndirectObject(uint32_t objnum);
+
+  // Take ownership of |pObj|.
+  uint32_t AddIndirectObject(CPDF_Object* pObj);
+  bool ReplaceIndirectObjectIfHigherGeneration(uint32_t objnum,
+                                               CPDF_Object* pObj);
+
+  uint32_t GetLastObjNum() const { return m_LastObjNum; }
+  void SetLastObjNum(uint32_t objnum) { m_LastObjNum = objnum; }
+
+  const_iterator begin() const { return m_IndirectObjs.begin(); }
+  const_iterator end() const { return m_IndirectObjs.end(); }
+
+ protected:
+  virtual CPDF_Object* ParseIndirectObject(uint32_t objnum);
+
+ private:
+  uint32_t m_LastObjNum;
+  std::map<uint32_t, std::unique_ptr<CPDF_Object>> m_IndirectObjs;
+};
+
+#endif  // CORE_FPDFAPI_FPDF_PARSER_CPDF_INDIRECT_OBJECT_HOLDER_H_