diff options
Diffstat (limited to 'core/src/fpdfapi/fpdf_parser')
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp | 483 |
1 files changed, 226 insertions, 257 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp index b01c057180..35c1a5892b 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp @@ -17,6 +17,12 @@ namespace { +struct SearchTagRecord { + const uint8_t* m_pTag; + FX_DWORD m_Len; + FX_DWORD m_Offset; +}; + int CompareFileSize(const void* p1, const void* p2) { return *(FX_FILESIZE*)p1 - *(FX_FILESIZE*)p2; } @@ -59,8 +65,21 @@ FX_DWORD GetVarInt(const uint8_t* p, int32_t n) { return result; } +int32_t GetStreamNCount(CPDF_StreamAcc* pObjStream) { + return pObjStream->GetDict()->GetInteger(FX_BSTRC("N")); +} + +int32_t GetStreamFirst(CPDF_StreamAcc* pObjStream) { + return pObjStream->GetDict()->GetInteger(FX_BSTRC("First")); +} + } // namespace +// TODO(thestig) Using unique_ptr with ReleaseDeleter is still not ideal. +// Come up or wait for something better. +using ScopedFileStream = + nonstd::unique_ptr<IFX_FileStream, ReleaseDeleter<IFX_FileStream>>; + FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict) { CPDF_Object* pType = pDict->GetElementValue(FX_BSTRC("Type")); if (!pType) { @@ -361,27 +380,26 @@ FX_BOOL CPDF_Parser::LoadAllCrossRefV4(FX_FILESIZE xrefpos) { while (xrefpos) { CrossRefList.InsertAt(0, xrefpos); LoadCrossRefV4(xrefpos, 0, TRUE, FALSE); - CPDF_Dictionary* pDict = LoadTrailerV4(); - if (pDict == NULL) { + nonstd::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict( + LoadTrailerV4()); + if (!pDict) return FALSE; - } - if (!CheckDirectType(pDict, FX_BSTRC("Prev"), PDFOBJ_NUMBER)) { - pDict->Release(); + + if (!CheckDirectType(pDict.get(), FX_BSTRC("Prev"), PDFOBJ_NUMBER)) return FALSE; - } - newxrefpos = GetDirectInteger(pDict, FX_BSTRC("Prev")); - if (newxrefpos == xrefpos) { - pDict->Release(); + + newxrefpos = GetDirectInteger(pDict.get(), FX_BSTRC("Prev")); + if (newxrefpos == xrefpos) return FALSE; - } + xrefpos = newxrefpos; XRefStreamList.InsertAt(0, pDict->GetInteger(FX_BSTRC("XRefStm"))); - m_Trailers.Add(pDict); + m_Trailers.Add(pDict.release()); } - for (int32_t i = 0; i < CrossRefList.GetSize(); i++) - if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE, i == 0)) { + for (int32_t i = 0; i < CrossRefList.GetSize(); i++) { + if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE, i == 0)) return FALSE; - } + } return TRUE; } FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV4(FX_FILESIZE xrefpos, @@ -1197,45 +1215,42 @@ FX_BOOL CPDF_Parser::IsFormStream(FX_DWORD objnum, FX_BOOL& bForm) { m_Syntax.RestorePos(SavedPos); return TRUE; } + CPDF_Object* CPDF_Parser::ParseIndirectObject(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, PARSE_CONTEXT* pContext) { - if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) { - return NULL; - } + if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) + return nullptr; + if (m_V5Type[objnum] == 1 || m_V5Type[objnum] == 255) { FX_FILESIZE pos = m_CrossRef[objnum]; - if (pos <= 0) { - return NULL; - } + if (pos <= 0) + return nullptr; return ParseIndirectObjectAt(pObjList, pos, objnum, pContext); } - if (m_V5Type[objnum] == 2) { - CPDF_StreamAcc* pObjStream = GetObjectStream((FX_DWORD)m_CrossRef[objnum]); - if (pObjStream == NULL) { - return NULL; - } - int32_t n = pObjStream->GetDict()->GetInteger(FX_BSTRC("N")); - int32_t offset = pObjStream->GetDict()->GetInteger(FX_BSTRC("First")); - CPDF_SyntaxParser syntax; - CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream( - (uint8_t*)pObjStream->GetData(), (size_t)pObjStream->GetSize(), FALSE)); - syntax.InitParser(file.Get(), 0); - CPDF_Object* pRet = NULL; - while (n) { - FX_DWORD thisnum = syntax.GetDirectNum(); - FX_DWORD thisoff = syntax.GetDirectNum(); - if (thisnum == objnum) { - syntax.RestorePos(offset + thisoff); - pRet = syntax.GetObject(pObjList, 0, 0, pContext); - break; - } - n--; - } - return pRet; - } - return NULL; + if (m_V5Type[objnum] != 2) + return nullptr; + + CPDF_StreamAcc* pObjStream = GetObjectStream((FX_DWORD)m_CrossRef[objnum]); + if (!pObjStream) + return nullptr; + + ScopedFileStream file(FX_CreateMemoryStream( + (uint8_t*)pObjStream->GetData(), (size_t)pObjStream->GetSize(), FALSE)); + CPDF_SyntaxParser syntax; + syntax.InitParser(file.get(), 0); + int32_t offset = GetStreamFirst(pObjStream); + for (int32_t i = GetStreamNCount(pObjStream); i > 0; --i) { + FX_DWORD thisnum = syntax.GetDirectNum(); + FX_DWORD thisoff = syntax.GetDirectNum(); + if (thisnum == objnum) { + syntax.RestorePos(offset + thisoff); + return syntax.GetObject(pObjList, 0, 0, pContext); + } + } + return nullptr; } + CPDF_StreamAcc* CPDF_Parser::GetObjectStream(FX_DWORD objnum) { CPDF_StreamAcc* pStreamAcc = NULL; if (m_ObjectStreamMap.Lookup((void*)(uintptr_t)objnum, (void*&)pStreamAcc)) { @@ -1287,103 +1302,105 @@ void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum, } if (m_V5Type[objnum] == 2) { CPDF_StreamAcc* pObjStream = GetObjectStream((FX_DWORD)m_CrossRef[objnum]); - if (pObjStream == NULL) { + if (!pObjStream) return; - } - int32_t n = pObjStream->GetDict()->GetInteger(FX_BSTRC("N")); - int32_t offset = pObjStream->GetDict()->GetInteger(FX_BSTRC("First")); - CPDF_SyntaxParser syntax; + + int32_t offset = GetStreamFirst(pObjStream); const uint8_t* pData = pObjStream->GetData(); FX_DWORD totalsize = pObjStream->GetSize(); - CFX_SmartPointer<IFX_FileStream> file( + ScopedFileStream file( FX_CreateMemoryStream((uint8_t*)pData, (size_t)totalsize, FALSE)); - syntax.InitParser(file.Get(), 0); - while (n) { + CPDF_SyntaxParser syntax; + syntax.InitParser(file.get(), 0); + for (int i = GetStreamNCount(pObjStream); i > 0; --i) { FX_DWORD thisnum = syntax.GetDirectNum(); FX_DWORD thisoff = syntax.GetDirectNum(); - if (thisnum == objnum) { - if (n == 1) { - size = totalsize - (thisoff + offset); - } else { - syntax.GetDirectNum(); // Skip nextnum. - FX_DWORD nextoff = syntax.GetDirectNum(); - size = nextoff - thisoff; - } - pBuffer = FX_Alloc(uint8_t, size); - FXSYS_memcpy(pBuffer, pData + thisoff + offset, size); - return; + if (thisnum != objnum) + continue; + + if (i == 1) { + size = totalsize - (thisoff + offset); + } else { + syntax.GetDirectNum(); // Skip nextnum. + FX_DWORD nextoff = syntax.GetDirectNum(); + size = nextoff - thisoff; } - n--; + pBuffer = FX_Alloc(uint8_t, size); + FXSYS_memcpy(pBuffer, pData + thisoff + offset, size); + return; } return; } - if (m_V5Type[objnum] == 1) { - FX_FILESIZE pos = m_CrossRef[objnum]; - if (pos == 0) { - return; - } - FX_FILESIZE SavedPos = m_Syntax.SavePos(); - m_Syntax.RestorePos(pos); - FX_BOOL bIsNumber; - CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber); - if (!bIsNumber) { - m_Syntax.RestorePos(SavedPos); - return; - } - FX_DWORD parser_objnum = FXSYS_atoi(word); - if (parser_objnum && parser_objnum != objnum) { - m_Syntax.RestorePos(SavedPos); - return; - } + + if (m_V5Type[objnum] != 1) + return; + + FX_FILESIZE pos = m_CrossRef[objnum]; + if (pos == 0) { + return; + } + FX_FILESIZE SavedPos = m_Syntax.SavePos(); + m_Syntax.RestorePos(pos); + FX_BOOL bIsNumber; + CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber); + if (!bIsNumber) { + m_Syntax.RestorePos(SavedPos); + return; + } + FX_DWORD parser_objnum = FXSYS_atoi(word); + if (parser_objnum && parser_objnum != objnum) { + m_Syntax.RestorePos(SavedPos); + return; + } + word = m_Syntax.GetNextWord(bIsNumber); + if (!bIsNumber) { + m_Syntax.RestorePos(SavedPos); + return; + } + if (m_Syntax.GetKeyword() != FX_BSTRC("obj")) { + m_Syntax.RestorePos(SavedPos); + return; + } + void* pResult = + FXSYS_bsearch(&pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), + sizeof(FX_FILESIZE), CompareFileSize); + if (pResult == NULL) { + m_Syntax.RestorePos(SavedPos); + return; + } + FX_FILESIZE nextoff = ((FX_FILESIZE*)pResult)[1]; + FX_BOOL bNextOffValid = FALSE; + if (nextoff != pos) { + m_Syntax.RestorePos(nextoff); word = m_Syntax.GetNextWord(bIsNumber); - if (!bIsNumber) { - m_Syntax.RestorePos(SavedPos); - return; - } - if (m_Syntax.GetKeyword() != FX_BSTRC("obj")) { - m_Syntax.RestorePos(SavedPos); - return; - } - void* pResult = - FXSYS_bsearch(&pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), - sizeof(FX_FILESIZE), CompareFileSize); - if (pResult == NULL) { - m_Syntax.RestorePos(SavedPos); - return; - } - FX_FILESIZE nextoff = ((FX_FILESIZE*)pResult)[1]; - FX_BOOL bNextOffValid = FALSE; - if (nextoff != pos) { - m_Syntax.RestorePos(nextoff); + if (word == FX_BSTRC("xref")) { + bNextOffValid = TRUE; + } else if (bIsNumber) { word = m_Syntax.GetNextWord(bIsNumber); - if (word == FX_BSTRC("xref")) { + if (bIsNumber && m_Syntax.GetKeyword() == FX_BSTRC("obj")) { bNextOffValid = TRUE; - } else if (bIsNumber) { - word = m_Syntax.GetNextWord(bIsNumber); - if (bIsNumber && m_Syntax.GetKeyword() == FX_BSTRC("obj")) { - bNextOffValid = TRUE; - } } } - if (!bNextOffValid) { - m_Syntax.RestorePos(pos); - while (1) { - if (m_Syntax.GetKeyword() == FX_BSTRC("endobj")) { - break; - } - if (m_Syntax.SavePos() == m_Syntax.m_FileLen) { - break; - } + } + if (!bNextOffValid) { + m_Syntax.RestorePos(pos); + while (1) { + if (m_Syntax.GetKeyword() == FX_BSTRC("endobj")) { + break; + } + if (m_Syntax.SavePos() == m_Syntax.m_FileLen) { + break; } - nextoff = m_Syntax.SavePos(); } - size = (FX_DWORD)(nextoff - pos); - pBuffer = FX_Alloc(uint8_t, size); - m_Syntax.RestorePos(pos); - m_Syntax.ReadBlock(pBuffer, size); - m_Syntax.RestorePos(SavedPos); + nextoff = m_Syntax.SavePos(); } + size = (FX_DWORD)(nextoff - pos); + pBuffer = FX_Alloc(uint8_t, size); + m_Syntax.RestorePos(pos); + m_Syntax.ReadBlock(pBuffer, size); + m_Syntax.RestorePos(SavedPos); } + CPDF_Object* CPDF_Parser::ParseIndirectObjectAt(CPDF_IndirectObjects* pObjList, FX_FILESIZE pos, FX_DWORD objnum, @@ -1466,19 +1483,18 @@ CPDF_Object* CPDF_Parser::ParseIndirectObjectAtByStrict( m_Syntax.RestorePos(SavedPos); return pObj; } + CPDF_Dictionary* CPDF_Parser::LoadTrailerV4() { - if (m_Syntax.GetKeyword() != FX_BSTRC("trailer")) { - return NULL; - } - CPDF_Object* pObj = m_Syntax.GetObject(m_pDocument, 0, 0, 0); - if (pObj == NULL || pObj->GetType() != PDFOBJ_DICTIONARY) { - if (pObj) { - pObj->Release(); - } - return NULL; - } - return (CPDF_Dictionary*)pObj; + if (m_Syntax.GetKeyword() != FX_BSTRC("trailer")) + return nullptr; + + nonstd::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pObj( + m_Syntax.GetObject(m_pDocument, 0, 0, 0)); + if (!pObj || pObj->GetType() != PDFOBJ_DICTIONARY) + return nullptr; + return static_cast<CPDF_Dictionary*>(pObj.release()); } + FX_DWORD CPDF_Parser::GetPermissions(FX_BOOL bCheckRevision) { if (m_pSecurityHandler == NULL) { return (FX_DWORD)-1; @@ -2138,13 +2154,10 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, return (CPDF_Object*)PDFOBJ_ARRAY; } CPDF_Array* pArray = CPDF_Array::Create(); - while (1) { - CPDF_Object* pObj = GetObject(pObjList, objnum, gennum); - if (pObj == NULL) { - return pArray; - } + while (CPDF_Object* pObj = GetObject(pObjList, objnum, gennum)) pArray->Add(pObj); - } + + return pArray; } if (word[0] == '/') { if (bTypeOnly) { @@ -2155,43 +2168,42 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, return pRet; } if (word == FX_BSTRC("<<")) { - if (bTypeOnly) { + if (bTypeOnly) return (CPDF_Object*)PDFOBJ_DICTIONARY; - } - if (pContext) { + + if (pContext) pContext->m_DictStart = SavedPos; - } - CPDF_Dictionary* pDict = CPDF_Dictionary::Create(); + int32_t nKeys = 0; FX_FILESIZE dwSignValuePos = 0; + nonstd::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict( + CPDF_Dictionary::Create()); while (1) { FX_BOOL bIsNumber; CFX_ByteString key = GetNextWord(bIsNumber); - if (key.IsEmpty()) { - if (pDict) - pDict->Release(); - return NULL; - } + if (key.IsEmpty()) + return nullptr; + FX_FILESIZE SavedPos = m_Pos - key.GetLength(); - if (key == FX_BSTRC(">>")) { + if (key == FX_BSTRC(">>")) break; - } + if (key == FX_BSTRC("endobj")) { m_Pos = SavedPos; break; } - if (key[0] != '/') { + if (key[0] != '/') continue; - } - nKeys++; + + ++nKeys; key = PDF_NameDecode(key); - if (key == FX_BSTRC("/Contents")) { + if (key == FX_BSTRC("/Contents")) dwSignValuePos = m_Pos; - } + CPDF_Object* pObj = GetObject(pObjList, objnum, gennum); - if (pObj == NULL) { + if (!pObj) continue; - } + if (key.GetLength() >= 1) { if (nKeys < 32) { pDict->SetAt(CFX_ByteStringC(key.c_str() + 1, key.GetLength() - 1), @@ -2202,7 +2214,8 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, } } } - if (IsSignatureDict(pDict)) { + + if (IsSignatureDict(pDict.get())) { FX_FILESIZE dwSavePos = m_Pos; m_Pos = dwSignValuePos; CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, NULL, FALSE); @@ -2212,34 +2225,29 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, if (pContext) { pContext->m_DictEnd = m_Pos; if (pContext->m_Flags & PDFPARSE_NOSTREAM) { - return pDict; + return pDict.release(); } } FX_FILESIZE SavedPos = m_Pos; FX_BOOL bIsNumber; CFX_ByteString nextword = GetNextWord(bIsNumber); - if (nextword == FX_BSTRC("stream")) { - CPDF_Stream* pStream = ReadStream(pDict, pContext, objnum, gennum); - if (pStream) { - return pStream; - } - if (pDict) - pDict->Release(); - return NULL; - } else { + if (nextword != FX_BSTRC("stream")) { m_Pos = SavedPos; - return pDict; + return pDict.release(); } + + return ReadStream(pDict.release(), pContext, objnum, gennum); } if (word == FX_BSTRC(">>")) { m_Pos = SavedPos; - return NULL; + return nullptr; } - if (bTypeOnly) { + if (bTypeOnly) return (CPDF_Object*)PDFOBJ_INVALID; - } - return NULL; + + return nullptr; } + CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict( CPDF_IndirectObjects* pObjList, FX_DWORD objnum, @@ -2314,20 +2322,11 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict( if (bTypeOnly) { return (CPDF_Object*)PDFOBJ_ARRAY; } - CPDF_Array* pArray = CPDF_Array::Create(); - while (1) { - CPDF_Object* pObj = GetObject(pObjList, objnum, gennum); - if (pObj == NULL) { - if (m_WordBuffer[0] == ']') { - return pArray; - } - if (pArray) { - pArray->Release(); - } - return NULL; - } + nonstd::unique_ptr<CPDF_Array, ReleaseDeleter<CPDF_Array>> pArray( + CPDF_Array::Create()); + while (CPDF_Object* pObj = GetObject(pObjList, objnum, gennum)) pArray->Add(pObj); - } + return m_WordBuffer[0] == ']' ? pArray.release() : nullptr; } if (word[0] == '/') { if (bTypeOnly) { @@ -2343,44 +2342,33 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict( if (pContext) { pContext->m_DictStart = SavedPos; } - CPDF_Dictionary* pDict = CPDF_Dictionary::Create(); + nonstd::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict( + CPDF_Dictionary::Create()); while (1) { FX_BOOL bIsNumber; FX_FILESIZE SavedPos = m_Pos; CFX_ByteString key = GetNextWord(bIsNumber); - if (key.IsEmpty()) { - if (pDict) { - pDict->Release(); - } - return NULL; - } - if (key == FX_BSTRC(">>")) { + if (key.IsEmpty()) + return nullptr; + + if (key == FX_BSTRC(">>")) break; - } + if (key == FX_BSTRC("endobj")) { m_Pos = SavedPos; break; } - if (key[0] != '/') { + if (key[0] != '/') continue; - } + key = PDF_NameDecode(key); nonstd::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> obj( GetObject(pObjList, objnum, gennum)); if (!obj) { - if (pDict) { - pDict->Release(); - } uint8_t ch; - while (1) { - if (!GetNextChar(ch)) { - break; - } - if (ch == 0x0A || ch == 0x0D) { - break; - } + while (GetNextChar(ch) && ch != 0x0A && ch != 0x0D) { } - return NULL; + return nullptr; } if (key.GetLength() > 1) { pDict->AddValue(CFX_ByteStringC(key.c_str() + 1, key.GetLength() - 1), @@ -2390,35 +2378,29 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict( if (pContext) { pContext->m_DictEnd = m_Pos; if (pContext->m_Flags & PDFPARSE_NOSTREAM) { - return pDict; + return pDict.release(); } } FX_FILESIZE SavedPos = m_Pos; FX_BOOL bIsNumber; CFX_ByteString nextword = GetNextWord(bIsNumber); - if (nextword == FX_BSTRC("stream")) { - CPDF_Stream* pStream = ReadStream(pDict, pContext, objnum, gennum); - if (pStream) { - return pStream; - } - if (pDict) { - pDict->Release(); - } - return NULL; - } else { + if (nextword != FX_BSTRC("stream")) { m_Pos = SavedPos; - return pDict; + return pDict.release(); } + + return ReadStream(pDict.release(), pContext, objnum, gennum); } if (word == FX_BSTRC(">>")) { m_Pos = SavedPos; - return NULL; + return nullptr; } - if (bTypeOnly) { + if (bTypeOnly) return (CPDF_Object*)PDFOBJ_INVALID; - } - return NULL; + + return nullptr; } + unsigned int CPDF_SyntaxParser::ReadEOLMarkers(FX_FILESIZE pos) { unsigned char byte1 = 0; unsigned char byte2 = 0; @@ -2682,12 +2664,6 @@ FX_BOOL CPDF_SyntaxParser::SearchWord(const CFX_ByteStringC& tag, return FALSE; } -struct _SearchTagRecord { - const uint8_t* m_pTag; - FX_DWORD m_Len; - FX_DWORD m_Offset; -}; - int32_t CPDF_SyntaxParser::SearchMultiWord(const CFX_ByteStringC& tags, FX_BOOL bWholeWord, FX_FILESIZE limit) { @@ -2698,7 +2674,7 @@ int32_t CPDF_SyntaxParser::SearchMultiWord(const CFX_ByteStringC& tags, } } - std::vector<_SearchTagRecord> patterns(ntags); + std::vector<SearchTagRecord> patterns(ntags); FX_DWORD start = 0; FX_DWORD itag = 0; FX_DWORD max_len = 0; @@ -2721,7 +2697,7 @@ int32_t CPDF_SyntaxParser::SearchMultiWord(const CFX_ByteStringC& tags, break; for (int i = 0; i < ntags; ++i) { - _SearchTagRecord& pat = patterns[i]; + SearchTagRecord& pat = patterns[i]; if (pat.m_pTag[pat.m_Offset] != byte) { pat.m_Offset = (pat.m_pTag[0] == byte) ? 1 : 0; continue; @@ -3740,15 +3716,14 @@ int32_t CPDF_DataAvail::IsLinearizedPDF() { return PDF_NOT_LINEARIZED; } FX_BOOL CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, FX_DWORD dwLen) { - CFX_SmartPointer<IFX_FileStream> file( - FX_CreateMemoryStream(pData, (size_t)dwLen, FALSE)); - int32_t offset = GetHeaderOffset(file.Get()); + ScopedFileStream file(FX_CreateMemoryStream(pData, (size_t)dwLen, FALSE)); + int32_t offset = GetHeaderOffset(file.get()); if (offset == -1) { m_docStatus = PDF_DATAAVAIL_ERROR; return FALSE; } m_dwHeaderOffset = offset; - m_syntaxParser.InitParser(file.Get(), offset); + m_syntaxParser.InitParser(file.get(), offset); m_syntaxParser.RestorePos(m_syntaxParser.m_HeaderOffset + 9); FX_BOOL bNumber = FALSE; CFX_ByteString wordObjNum = m_syntaxParser.GetNextWord(bNumber); @@ -3789,9 +3764,8 @@ FX_BOOL CPDF_DataAvail::CheckEnd(IFX_DownloadHints* pHints) { if (m_pFileAvail->IsDataAvail(req_pos, dwSize)) { uint8_t buffer[1024]; m_pFileRead->ReadBlock(buffer, req_pos, dwSize); - CFX_SmartPointer<IFX_FileStream> file( - FX_CreateMemoryStream(buffer, (size_t)dwSize, FALSE)); - m_syntaxParser.InitParser(file.Get(), 0); + ScopedFileStream file(FX_CreateMemoryStream(buffer, (size_t)dwSize, FALSE)); + m_syntaxParser.InitParser(file.get(), 0); m_syntaxParser.RestorePos(dwSize - 1); if (m_syntaxParser.SearchWord(FX_BSTRC("startxref"), TRUE, FALSE, dwSize)) { FX_BOOL bNumber; @@ -3827,9 +3801,8 @@ int32_t CPDF_DataAvail::CheckCrossRefStream(IFX_DownloadHints* pHints, CFX_BinaryBuf buf(iSize); uint8_t* pBuf = buf.GetBuffer(); m_pFileRead->ReadBlock(pBuf, m_dwCurrentXRefSteam, iSize); - CFX_SmartPointer<IFX_FileStream> file( - FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE)); - m_parser.m_Syntax.InitParser(file.Get(), 0); + ScopedFileStream file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE)); + m_parser.m_Syntax.InitParser(file.get(), 0); FX_BOOL bNumber = FALSE; CFX_ByteString objnum = m_parser.m_Syntax.GetNextWord(bNumber); if (!bNumber) { @@ -4067,31 +4040,28 @@ FX_BOOL CPDF_DataAvail::CheckTrailer(IFX_DownloadHints* pHints) { if (!m_pFileRead->ReadBlock(pBuf, m_dwTrailerOffset, iSize)) { return FALSE; } - CFX_SmartPointer<IFX_FileStream> file( - FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE)); - m_syntaxParser.InitParser(file.Get(), 0); - CPDF_Object* pTrailer = m_syntaxParser.GetObject(nullptr, 0, 0); + ScopedFileStream file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE)); + m_syntaxParser.InitParser(file.get(), 0); + nonstd::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pTrailer( + m_syntaxParser.GetObject(nullptr, 0, 0)); if (!pTrailer) { m_Pos += m_syntaxParser.SavePos(); pHints->AddSegment(m_Pos, iTrailerSize); return FALSE; } - if (pTrailer->GetType() != PDFOBJ_DICTIONARY) { - pTrailer->Release(); + if (pTrailer->GetType() != PDFOBJ_DICTIONARY) return FALSE; - } + CPDF_Dictionary* pTrailerDict = pTrailer->GetDict(); CPDF_Object* pEncrypt = pTrailerDict->GetElement("Encrypt"); if (pEncrypt && pEncrypt->GetType() == PDFOBJ_REFERENCE) { m_docStatus = PDF_DATAAVAIL_LOADALLFILE; - pTrailer->Release(); return TRUE; } - FX_DWORD xrefpos = GetDirectInteger(pTrailer->GetDict(), FX_BSTRC("Prev")); + + FX_DWORD xrefpos = GetDirectInteger(pTrailerDict, FX_BSTRC("Prev")); if (xrefpos) { - m_dwPrevXRefOffset = - GetDirectInteger(pTrailer->GetDict(), FX_BSTRC("XRefStm")); - pTrailer->Release(); + m_dwPrevXRefOffset = GetDirectInteger(pTrailerDict, FX_BSTRC("XRefStm")); if (m_dwPrevXRefOffset) { m_docStatus = PDF_DATAAVAIL_LOADALLFILE; } else { @@ -4107,7 +4077,6 @@ FX_BOOL CPDF_DataAvail::CheckTrailer(IFX_DownloadHints* pHints) { } m_dwPrevXRefOffset = 0; m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND; - pTrailer->Release(); return TRUE; } pHints->AddSegment(m_Pos, iTrailerSize); |