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| 1 // Copyright 2014 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/include/fpdfapi/fpdf_parser.h" | |
| 8 | |
| 9 #include "core/include/fpdfapi/fpdf_serial.h" | |
| 10 #include "core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.h" | |
| 11 | |
| 12 CFDF_Document::CFDF_Document() : CPDF_IndirectObjectHolder(NULL) { | |
| 13 m_pRootDict = NULL; | |
| 14 m_pFile = NULL; | |
| 15 m_bOwnFile = FALSE; | |
| 16 } | |
| 17 CFDF_Document::~CFDF_Document() { | |
| 18 if (m_bOwnFile && m_pFile) { | |
| 19 m_pFile->Release(); | |
| 20 } | |
| 21 } | |
| 22 CFDF_Document* CFDF_Document::CreateNewDoc() { | |
| 23 CFDF_Document* pDoc = new CFDF_Document; | |
| 24 pDoc->m_pRootDict = new CPDF_Dictionary; | |
| 25 pDoc->AddIndirectObject(pDoc->m_pRootDict); | |
| 26 CPDF_Dictionary* pFDFDict = new CPDF_Dictionary; | |
| 27 pDoc->m_pRootDict->SetAt("FDF", pFDFDict); | |
| 28 return pDoc; | |
| 29 } | |
| 30 CFDF_Document* CFDF_Document::ParseFile(IFX_FileRead* pFile, FX_BOOL bOwnFile) { | |
| 31 if (!pFile) { | |
| 32 return NULL; | |
| 33 } | |
| 34 CFDF_Document* pDoc = new CFDF_Document; | |
| 35 pDoc->ParseStream(pFile, bOwnFile); | |
| 36 if (!pDoc->m_pRootDict) { | |
| 37 delete pDoc; | |
| 38 return NULL; | |
| 39 } | |
| 40 return pDoc; | |
| 41 } | |
| 42 CFDF_Document* CFDF_Document::ParseMemory(const uint8_t* pData, FX_DWORD size) { | |
| 43 return CFDF_Document::ParseFile(FX_CreateMemoryStream((uint8_t*)pData, size), | |
| 44 TRUE); | |
| 45 } | |
| 46 void CFDF_Document::ParseStream(IFX_FileRead* pFile, FX_BOOL bOwnFile) { | |
| 47 m_pFile = pFile; | |
| 48 m_bOwnFile = bOwnFile; | |
| 49 CPDF_SyntaxParser parser; | |
| 50 parser.InitParser(m_pFile, 0); | |
| 51 while (1) { | |
| 52 bool bNumber; | |
| 53 CFX_ByteString word = parser.GetNextWord(&bNumber); | |
| 54 if (bNumber) { | |
| 55 FX_DWORD objnum = FXSYS_atoui(word); | |
| 56 word = parser.GetNextWord(&bNumber); | |
| 57 if (!bNumber) { | |
| 58 break; | |
| 59 } | |
| 60 word = parser.GetNextWord(nullptr); | |
| 61 if (word != "obj") { | |
| 62 break; | |
| 63 } | |
| 64 CPDF_Object* pObj = parser.GetObject(this, objnum, 0, true); | |
| 65 if (!pObj) { | |
| 66 break; | |
| 67 } | |
| 68 InsertIndirectObject(objnum, pObj); | |
| 69 word = parser.GetNextWord(nullptr); | |
| 70 if (word != "endobj") { | |
| 71 break; | |
| 72 } | |
| 73 } else { | |
| 74 if (word != "trailer") { | |
| 75 break; | |
| 76 } | |
| 77 if (CPDF_Dictionary* pMainDict = | |
| 78 ToDictionary(parser.GetObject(this, 0, 0, true))) { | |
| 79 m_pRootDict = pMainDict->GetDictBy("Root"); | |
| 80 pMainDict->Release(); | |
| 81 } | |
| 82 break; | |
| 83 } | |
| 84 } | |
| 85 } | |
| 86 FX_BOOL CFDF_Document::WriteBuf(CFX_ByteTextBuf& buf) const { | |
| 87 if (!m_pRootDict) { | |
| 88 return FALSE; | |
| 89 } | |
| 90 buf << "%FDF-1.2\r\n"; | |
| 91 for (const auto& pair : m_IndirectObjs) { | |
| 92 buf << pair.first << " 0 obj\r\n" << pair.second << "\r\nendobj\r\n\r\n"; | |
| 93 } | |
| 94 buf << "trailer\r\n<</Root " << m_pRootDict->GetObjNum() | |
| 95 << " 0 R>>\r\n%%EOF\r\n"; | |
| 96 return TRUE; | |
| 97 } | |
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