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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "core/fpdfapi/page/pageint.h" | 7 #include "core/fpdfapi/page/pageint.h" |
8 | 8 |
9 #include <limits.h> | 9 #include <limits.h> |
10 | 10 |
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131 const uint8_t* pData, | 131 const uint8_t* pData, |
132 uint32_t dwSize, | 132 uint32_t dwSize, |
133 const CFX_WeakPtr<CFX_ByteStringPool>& pPool) | 133 const CFX_WeakPtr<CFX_ByteStringPool>& pPool) |
134 : m_pBuf(pData), | 134 : m_pBuf(pData), |
135 m_Size(dwSize), | 135 m_Size(dwSize), |
136 m_Pos(0), | 136 m_Pos(0), |
137 m_pLastObj(nullptr), | 137 m_pLastObj(nullptr), |
138 m_pPool(pPool) {} | 138 m_pPool(pPool) {} |
139 | 139 |
140 CPDF_StreamParser::~CPDF_StreamParser() { | 140 CPDF_StreamParser::~CPDF_StreamParser() { |
141 if (m_pLastObj) { | 141 delete m_pLastObj; |
142 m_pLastObj->Release(); | |
143 } | |
144 } | 142 } |
145 | 143 |
146 CPDF_Stream* CPDF_StreamParser::ReadInlineStream(CPDF_Document* pDoc, | 144 CPDF_Stream* CPDF_StreamParser::ReadInlineStream(CPDF_Document* pDoc, |
147 CPDF_Dictionary* pDict, | 145 CPDF_Dictionary* pDict, |
148 CPDF_Object* pCSObj) { | 146 CPDF_Object* pCSObj) { |
149 if (m_Pos == m_Size) | 147 if (m_Pos == m_Size) |
150 return nullptr; | 148 return nullptr; |
151 | 149 |
152 if (PDFCharIsWhitespace(m_pBuf[m_Pos])) | 150 if (PDFCharIsWhitespace(m_pBuf[m_Pos])) |
153 m_Pos++; | 151 m_Pos++; |
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245 m_Pos = dwSavePos; | 243 m_Pos = dwSavePos; |
246 pData = FX_Alloc(uint8_t, dwStreamSize); | 244 pData = FX_Alloc(uint8_t, dwStreamSize); |
247 FXSYS_memcpy(pData, m_pBuf + m_Pos, dwStreamSize); | 245 FXSYS_memcpy(pData, m_pBuf + m_Pos, dwStreamSize); |
248 m_Pos += dwStreamSize; | 246 m_Pos += dwStreamSize; |
249 } | 247 } |
250 pDict->SetIntegerFor("Length", (int)dwStreamSize); | 248 pDict->SetIntegerFor("Length", (int)dwStreamSize); |
251 return new CPDF_Stream(pData, dwStreamSize, pDict); | 249 return new CPDF_Stream(pData, dwStreamSize, pDict); |
252 } | 250 } |
253 | 251 |
254 CPDF_StreamParser::SyntaxType CPDF_StreamParser::ParseNextElement() { | 252 CPDF_StreamParser::SyntaxType CPDF_StreamParser::ParseNextElement() { |
255 if (m_pLastObj) { | 253 delete m_pLastObj; |
256 m_pLastObj->Release(); | 254 m_pLastObj = nullptr; |
257 m_pLastObj = nullptr; | |
258 } | |
259 | 255 |
260 m_WordSize = 0; | 256 m_WordSize = 0; |
261 bool bIsNumber = true; | 257 bool bIsNumber = true; |
262 if (!PositionIsInBounds()) | 258 if (!PositionIsInBounds()) |
263 return EndOfData; | 259 return EndOfData; |
264 | 260 |
265 int ch = m_pBuf[m_Pos++]; | 261 int ch = m_pBuf[m_Pos++]; |
266 while (1) { | 262 while (1) { |
267 while (PDFCharIsWhitespace(ch)) { | 263 while (PDFCharIsWhitespace(ch)) { |
268 if (!PositionIsInBounds()) | 264 if (!PositionIsInBounds()) |
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367 if (m_WordSize == 1) | 363 if (m_WordSize == 1) |
368 return new CPDF_String(ReadHexString(), true); | 364 return new CPDF_String(ReadHexString(), true); |
369 | 365 |
370 CPDF_Dictionary* pDict = new CPDF_Dictionary(m_pPool); | 366 CPDF_Dictionary* pDict = new CPDF_Dictionary(m_pPool); |
371 while (1) { | 367 while (1) { |
372 GetNextWord(bIsNumber); | 368 GetNextWord(bIsNumber); |
373 if (m_WordSize == 2 && m_WordBuffer[0] == '>') | 369 if (m_WordSize == 2 && m_WordBuffer[0] == '>') |
374 break; | 370 break; |
375 | 371 |
376 if (!m_WordSize || m_WordBuffer[0] != '/') { | 372 if (!m_WordSize || m_WordBuffer[0] != '/') { |
377 pDict->Release(); | 373 delete pDict; |
378 return nullptr; | 374 return nullptr; |
379 } | 375 } |
380 | 376 |
381 CFX_ByteString key = | 377 CFX_ByteString key = |
382 PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)); | 378 PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)); |
383 CPDF_Object* pObj = ReadNextObject(true, 0); | 379 CPDF_Object* pObj = ReadNextObject(true, 0); |
384 if (!pObj) { | 380 if (!pObj) { |
385 pDict->Release(); | 381 delete pDict; |
386 return nullptr; | 382 return nullptr; |
387 } | 383 } |
388 | 384 |
389 if (key.IsEmpty()) | 385 if (key.IsEmpty()) |
390 pObj->Release(); | 386 delete pObj; |
391 else | 387 else |
392 pDict->SetFor(key, pObj); | 388 pDict->SetFor(key, pObj); |
393 } | 389 } |
394 return pDict; | 390 return pDict; |
395 } | 391 } |
396 | 392 |
397 if (first_char == '[') { | 393 if (first_char == '[') { |
398 if ((!bAllowNestedArray && dwInArrayLevel) || | 394 if ((!bAllowNestedArray && dwInArrayLevel) || |
399 dwInArrayLevel > kMaxNestedArrayLevel) { | 395 dwInArrayLevel > kMaxNestedArrayLevel) { |
400 return nullptr; | 396 return nullptr; |
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837 } | 833 } |
838 m_Status = Done; | 834 m_Status = Done; |
839 return; | 835 return; |
840 } | 836 } |
841 steps++; | 837 steps++; |
842 if (pPause && pPause->NeedToPauseNow()) { | 838 if (pPause && pPause->NeedToPauseNow()) { |
843 break; | 839 break; |
844 } | 840 } |
845 } | 841 } |
846 } | 842 } |
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