core/fpdfapi/fpdf_parser/cpdf_stream.cpp - Issue 2392603004: Move core/fpdfapi/fpdf_parser to core/fpdfapi/parser

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Issue 2392603004: Move core/fpdfapi/fpdf_parser to core/fpdfapi/parser (Closed)

Patch Set: Rebase to master Created 4 years, 2 months ago

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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 #include "core/fpdfapi/fpdf_parser/cpdf_stream.h"

8

9 #include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"

10 #include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h"

11 #include "core/fpdfapi/fpdf_parser/fpdf_parser_decode.h"

12 #include "third_party/base/numerics/safe_conversions.h"

13 #include "third_party/base/stl_util.h"

14

15 CPDF_Stream::CPDF_Stream() {}

16

17 CPDF_Stream::CPDF_Stream(uint8_t* pData, uint32_t size, CPDF_Dictionary* pDict)

18 : m_pDict(pDict),

19 m_dwSize(size),

20 m_pDataBuf(pData) {}

21

22 CPDF_Stream::~CPDF_Stream() {}

23

24 CPDF_Object::Type CPDF_Stream::GetType() const {

25 return STREAM;

26 }

27

28 CPDF_Dictionary* CPDF_Stream::GetDict() const {

29 return m_pDict.get();

30 }

31

32 bool CPDF_Stream::IsStream() const {

33 return true;

34 }

35

36 CPDF_Stream* CPDF_Stream::AsStream() {

37 return this;

38 }

39

40 const CPDF_Stream* CPDF_Stream::AsStream() const {

41 return this;

42 }

43

44 void CPDF_Stream::InitStream(const uint8_t* pData,

45 uint32_t size,

46 CPDF_Dictionary* pDict) {

47 m_pDict.reset(pDict);

48 m_bMemoryBased = true;

49 m_pFile = nullptr;

50 m_pDataBuf.reset(FX_Alloc(uint8_t, size));

51 if (pData)

52 FXSYS_memcpy(m_pDataBuf.get(), pData, size);

53 m_dwSize = size;

54 if (m_pDict)

55 m_pDict->SetIntegerFor("Length", m_dwSize);

56 }

57

58 void CPDF_Stream::InitStreamFromFile(IFX_FileRead* pFile,

59 CPDF_Dictionary* pDict) {

60 m_pDict.reset(pDict);

61 m_bMemoryBased = false;

62 m_pDataBuf.reset();

63 m_pFile = pFile;

64 m_dwSize = pdfium::base::checked_cast<uint32_t>(pFile->GetSize());

65 if (m_pDict)

66 m_pDict->SetIntegerFor("Length", m_dwSize);

67 }

68

69 CPDF_Object* CPDF_Stream::Clone() const {

70 return CloneObjectNonCyclic(false);

71 }

72

73 CPDF_Object* CPDF_Stream::CloneNonCyclic(

74 bool bDirect,

75 std::set<const CPDF_Object> pVisited) const {

76 pVisited->insert(this);

77 CPDF_StreamAcc acc;

78 acc.LoadAllData(this, TRUE);

79 uint32_t streamSize = acc.GetSize();

80 CPDF_Dictionary* pDict = GetDict();

81 if (pDict && !pdfium::ContainsKey(*pVisited, pDict)) {

82 pDict = ToDictionary(

83 static_cast<CPDF_Object*>(pDict)->CloneNonCyclic(bDirect, pVisited));

84 }

85

86 return new CPDF_Stream(acc.DetachData(), streamSize, pDict);

87 }

88

89 void CPDF_Stream::SetData(const uint8_t* pData, uint32_t size) {

90 m_bMemoryBased = true;

91 m_pDataBuf.reset(FX_Alloc(uint8_t, size));

92 if (pData)

93 FXSYS_memcpy(m_pDataBuf.get(), pData, size);

94 m_dwSize = size;

95 if (!m_pDict)

96 m_pDict.reset(new CPDF_Dictionary());

97 m_pDict->SetIntegerFor("Length", size);

98 m_pDict->RemoveFor("Filter");

99 m_pDict->RemoveFor("DecodeParms");

100 }

101

102 FX_BOOL CPDF_Stream::ReadRawData(FX_FILESIZE offset,

103 uint8_t* buf,

104 uint32_t size) const {

105 if (m_bMemoryBased && m_pFile)

106 return m_pFile->ReadBlock(buf, offset, size);

107

108 if (m_pDataBuf)

109 FXSYS_memcpy(buf, m_pDataBuf.get() + offset, size);

110

111 return TRUE;

112 }

113

114 CFX_WideString CPDF_Stream::GetUnicodeText() const {

115 CPDF_StreamAcc stream;

116 stream.LoadAllData(this, FALSE);

117 return PDF_DecodeText(stream.GetData(), stream.GetSize());

118 }

119

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