1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FPDFAPI_PARSER_CPDF_STREAM_H_ 8 #define CORE_FPDFAPI_PARSER_CPDF_STREAM_H_ 9 10 #include <memory> 11 #include <set> 12 13 #include "core/fpdfapi/parser/cpdf_dictionary.h" 14 #include "core/fpdfapi/parser/cpdf_object.h" 15 #include "core/fxcrt/fx_basic.h" 16 17 class CPDF_Stream : public CPDF_Object { 18 public: 19 CPDF_Stream(); 20 21 // Takes ownership of |pData|. 22 CPDF_Stream(std::unique_ptr<uint8_t, FxFreeDeleter> pData, 23 uint32_t size, 24 std::unique_ptr<CPDF_Dictionary> pDict); 25 26 ~CPDF_Stream() override; 27 28 // CPDF_Object: 29 Type GetType() const override; 30 std::unique_ptr<CPDF_Object> Clone() const override; 31 CPDF_Dictionary* GetDict() const override; 32 CFX_WideString GetUnicodeText() const override; 33 bool IsStream() const override; 34 CPDF_Stream* AsStream() override; 35 const CPDF_Stream* AsStream() const override; 36 37 uint32_t GetRawSize() const { return m_dwSize; } 38 uint8_t* GetRawData() const { return m_pDataBuf.get(); } 39 40 // Does not takes onwership of |pData|, copies into internally-owned buffer. 41 void SetData(const uint8_t* pData, uint32_t size); 42 43 void InitStream(const uint8_t* pData, 44 uint32_t size, 45 std::unique_ptr<CPDF_Dictionary> pDict); 46 void InitStreamFromFile(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, 47 std::unique_ptr<CPDF_Dictionary> pDict); 48 49 bool ReadRawData(FX_FILESIZE start_pos, 50 uint8_t* pBuf, 51 uint32_t buf_size) const; 52 53 bool IsMemoryBased() const { return m_bMemoryBased; } 54 bool HasFilter() const; 55 56 protected: 57 std::unique_ptr<CPDF_Object> CloneNonCyclic( 58 bool bDirect, 59 std::set<const CPDF_Object*>* pVisited) const override; 60 61 bool m_bMemoryBased = true; 62 uint32_t m_dwSize = 0; 63 std::unique_ptr<CPDF_Dictionary> m_pDict; 64 std::unique_ptr<uint8_t, FxFreeDeleter> m_pDataBuf; 65 CFX_RetainPtr<IFX_SeekableReadStream> m_pFile; 66 }; 67 68 inline CPDF_Stream* ToStream(CPDF_Object* obj) { 69 return obj ? obj->AsStream() : nullptr; 70 } 71 72 inline const CPDF_Stream* ToStream(const CPDF_Object* obj) { 73 return obj ? obj->AsStream() : nullptr; 74 } 75 76 inline std::unique_ptr<CPDF_Stream> ToStream(std::unique_ptr<CPDF_Object> obj) { 77 CPDF_Stream* pStream = ToStream(obj.get()); 78 if (!pStream) 79 return nullptr; 80 obj.release(); 81 return std::unique_ptr<CPDF_Stream>(pStream); 82 } 83 84 #endif // CORE_FPDFAPI_PARSER_CPDF_STREAM_H_ 85
