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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
// 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 <utility>
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_number.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include "core/fxcrt/fx_stream.h"
#include "third_party/base/numerics/safe_conversions.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
CPDF_Stream::CPDF_Stream() {}
CPDF_Stream::CPDF_Stream(std::unique_ptr<uint8_t, FxFreeDeleter> pData,
uint32_t size,
std::unique_ptr<CPDF_Dictionary> pDict)
: m_pDict(std::move(pDict)) {
SetData(std::move(pData), size);
}
CPDF_Stream::~CPDF_Stream() {
m_ObjNum = kInvalidObjNum;
if (m_pDict && m_pDict->GetObjNum() == kInvalidObjNum)
m_pDict.release(); // lowercase release, release ownership.
}
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,
std::unique_ptr<CPDF_Dictionary> pDict) {
m_pDict = std::move(pDict);
SetData(pData, size);
}
void CPDF_Stream::InitStreamFromFile(
const RetainPtr<IFX_SeekableReadStream>& pFile,
std::unique_ptr<CPDF_Dictionary> pDict) {
m_pDict = std::move(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->SetNewFor<CPDF_Number>("Length", static_cast<int>(m_dwSize));
}
std::unique_ptr<CPDF_Object> CPDF_Stream::Clone() const {
return CloneObjectNonCyclic(false);
}
std::unique_ptr<CPDF_Object> CPDF_Stream::CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const {
pVisited->insert(this);
auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(this);
pAcc->LoadAllDataRaw();
uint32_t streamSize = pAcc->GetSize();
CPDF_Dictionary* pDict = GetDict();
std::unique_ptr<CPDF_Dictionary> pNewDict;
if (pDict && !pdfium::ContainsKey(*pVisited, pDict)) {
pNewDict = ToDictionary(
static_cast<CPDF_Object*>(pDict)->CloneNonCyclic(bDirect, pVisited));
}
return pdfium::MakeUnique<CPDF_Stream>(pAcc->DetachData(), streamSize,
std::move(pNewDict));
}
void CPDF_Stream::SetDataAndRemoveFilter(const uint8_t* pData, uint32_t size) {
SetData(pData, size);
m_pDict->RemoveFor("Filter");
m_pDict->RemoveFor("DecodeParms");
}
void CPDF_Stream::SetDataAndRemoveFilter(std::ostringstream* stream) {
SetDataAndRemoveFilter(
reinterpret_cast<const uint8_t*>(stream->str().c_str()), stream->tellp());
}
void CPDF_Stream::SetData(const uint8_t* pData, uint32_t size) {
std::unique_ptr<uint8_t, FxFreeDeleter> data_copy;
if (pData) {
data_copy.reset(FX_Alloc(uint8_t, size));
memcpy(data_copy.get(), pData, size);
}
SetData(std::move(data_copy), size);
}
void CPDF_Stream::SetData(std::unique_ptr<uint8_t, FxFreeDeleter> pData,
uint32_t size) {
m_bMemoryBased = true;
m_pFile = nullptr;
m_pDataBuf = std::move(pData);
m_dwSize = size;
if (!m_pDict)
m_pDict = pdfium::MakeUnique<CPDF_Dictionary>();
m_pDict->SetNewFor<CPDF_Number>("Length", static_cast<int>(size));
}
void CPDF_Stream::SetData(std::ostringstream* stream) {
SetData(reinterpret_cast<const uint8_t*>(stream->str().c_str()),
stream->tellp());
}
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)
memcpy(buf, m_pDataBuf.get() + offset, size);
return true;
}
bool CPDF_Stream::HasFilter() const {
return m_pDict && m_pDict->KeyExist("Filter");
}
WideString CPDF_Stream::GetUnicodeText() const {
auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(this);
pAcc->LoadAllDataFiltered();
return PDF_DecodeText(pAcc->GetData(), pAcc->GetSize());
}
bool CPDF_Stream::WriteTo(IFX_ArchiveStream* archive) const {
if (!GetDict()->WriteTo(archive) || !archive->WriteString("stream\r\n"))
return false;
auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(this);
pAcc->LoadAllDataRaw();
return archive->WriteBlock(pAcc->GetData(), pAcc->GetSize()) &&
archive->WriteString("\r\nendstream");
}
|
