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
GetRawSize()37 uint32_t GetRawSize() const { return m_dwSize; }
GetRawData()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
IsMemoryBased()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
ToStream(CPDF_Object * obj)68 inline CPDF_Stream* ToStream(CPDF_Object* obj) {
69 return obj ? obj->AsStream() : nullptr;
70 }
71
ToStream(const CPDF_Object * obj)72 inline const CPDF_Stream* ToStream(const CPDF_Object* obj) {
73 return obj ? obj->AsStream() : nullptr;
74 }
75
ToStream(std::unique_ptr<CPDF_Object> obj)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