1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
// 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
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include "third_party/base/numerics/safe_conversions.h"
#include "third_party/base/stl_util.h"
CPDF_Stream::CPDF_Stream() {}
CPDF_Stream::CPDF_Stream(uint8_t* pData, uint32_t size, CPDF_Dictionary* pDict)
: m_pDict(pDict), m_dwSize(size), m_pDataBuf(pData) {}
CPDF_Stream::~CPDF_Stream() {}
CPDF_Object::Type CPDF_Stream::GetType() const {
return STREAM;
}
CPDF_Dictionary* CPDF_Stream::GetDict() const {
return m_pDict.get();
}
bool CPDF_Stream::IsStream() const {
return true;
}
CPDF_Stream* CPDF_Stream::AsStream() {
return this;
}
const CPDF_Stream* CPDF_Stream::AsStream() const {
return this;
}
void CPDF_Stream::InitStream(const uint8_t* pData,
uint32_t size,
CPDF_Dictionary* pDict) {
m_pDict.reset(pDict);
m_bMemoryBased = true;
m_pFile = nullptr;
m_pDataBuf.reset(FX_Alloc(uint8_t, size));
if (pData)
FXSYS_memcpy(m_pDataBuf.get(), pData, size);
m_dwSize = size;
if (m_pDict)
m_pDict->SetIntegerFor("Length", m_dwSize);
}
void CPDF_Stream::InitStreamFromFile(IFX_FileRead* pFile,
CPDF_Dictionary* pDict) {
m_pDict.reset(pDict);
m_bMemoryBased = false;
m_pDataBuf.reset();
m_pFile = pFile;
m_dwSize = pdfium::base::checked_cast<uint32_t>(pFile->GetSize());
if (m_pDict)
m_pDict->SetIntegerFor("Length", m_dwSize);
}
CPDF_Object* CPDF_Stream::Clone() const {
return CloneObjectNonCyclic(false);
}
CPDF_Object* CPDF_Stream::CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const {
pVisited->insert(this);
CPDF_StreamAcc acc;
acc.LoadAllData(this, TRUE);
uint32_t streamSize = acc.GetSize();
CPDF_Dictionary* pDict = GetDict();
if (pDict && !pdfium::ContainsKey(*pVisited, pDict)) {
pDict = ToDictionary(
static_cast<CPDF_Object*>(pDict)->CloneNonCyclic(bDirect, pVisited));
}
return new CPDF_Stream(acc.DetachData(), streamSize, pDict);
}
void CPDF_Stream::SetData(const uint8_t* pData, uint32_t size) {
m_bMemoryBased = true;
m_pDataBuf.reset(FX_Alloc(uint8_t, size));
if (pData)
FXSYS_memcpy(m_pDataBuf.get(), pData, size);
m_dwSize = size;
if (!m_pDict)
m_pDict.reset(new CPDF_Dictionary());
m_pDict->SetIntegerFor("Length", size);
m_pDict->RemoveFor("Filter");
m_pDict->RemoveFor("DecodeParms");
}
FX_BOOL CPDF_Stream::ReadRawData(FX_FILESIZE offset,
uint8_t* buf,
uint32_t size) const {
if (m_bMemoryBased && m_pFile)
return m_pFile->ReadBlock(buf, offset, size);
if (m_pDataBuf)
FXSYS_memcpy(buf, m_pDataBuf.get() + offset, size);
return TRUE;
}
CFX_WideString CPDF_Stream::GetUnicodeText() const {
CPDF_StreamAcc stream;
stream.LoadAllData(this, FALSE);
return PDF_DecodeText(stream.GetData(), stream.GetSize());
}
|
