| // Copyright 2014 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/cfdf_document.h" |
| |
| #include "core/fpdfapi/edit/cpdf_creator.h" |
| #include "core/fpdfapi/parser/cpdf_dictionary.h" |
| #include "core/fpdfapi/parser/cpdf_syntax_parser.h" |
| #include "third_party/base/ptr_util.h" |
| |
| CFDF_Document::CFDF_Document() |
| : CPDF_IndirectObjectHolder(), |
| m_pRootDict(nullptr), |
| m_pFile(nullptr), |
| m_bOwnFile(false), |
| m_pByteStringPool(pdfium::MakeUnique<CFX_ByteStringPool>()) {} |
| |
| CFDF_Document::~CFDF_Document() { |
| if (m_bOwnFile && m_pFile) |
| m_pFile->Release(); |
| m_pByteStringPool.DeleteObject(); // Make weak. |
| } |
| |
| CFDF_Document* CFDF_Document::CreateNewDoc() { |
| CFDF_Document* pDoc = new CFDF_Document; |
| pDoc->m_pRootDict = new CPDF_Dictionary(pDoc->GetByteStringPool()); |
| pDoc->AddIndirectObject(pDoc->m_pRootDict); |
| pDoc->m_pRootDict->SetFor("FDF", |
| new CPDF_Dictionary(pDoc->GetByteStringPool())); |
| return pDoc; |
| } |
| |
| CFDF_Document* CFDF_Document::ParseFile(IFX_SeekableReadStream* pFile, |
| bool bOwnFile) { |
| if (!pFile) |
| return nullptr; |
| |
| std::unique_ptr<CFDF_Document> pDoc(new CFDF_Document); |
| pDoc->ParseStream(pFile, bOwnFile); |
| return pDoc->m_pRootDict ? pDoc.release() : nullptr; |
| } |
| |
| CFDF_Document* CFDF_Document::ParseMemory(const uint8_t* pData, uint32_t size) { |
| return CFDF_Document::ParseFile(FX_CreateMemoryStream((uint8_t*)pData, size), |
| true); |
| } |
| |
| void CFDF_Document::ParseStream(IFX_SeekableReadStream* pFile, bool bOwnFile) { |
| m_pFile = pFile; |
| m_bOwnFile = bOwnFile; |
| CPDF_SyntaxParser parser; |
| parser.InitParser(m_pFile, 0); |
| while (1) { |
| bool bNumber; |
| CFX_ByteString word = parser.GetNextWord(&bNumber); |
| if (bNumber) { |
| uint32_t objnum = FXSYS_atoui(word.c_str()); |
| if (!objnum) |
| break; |
| |
| word = parser.GetNextWord(&bNumber); |
| if (!bNumber) |
| break; |
| |
| word = parser.GetNextWord(nullptr); |
| if (word != "obj") |
| break; |
| |
| auto pObj = pdfium::WrapUnique<CPDF_Object>( |
| parser.GetObject(this, objnum, 0, true)); |
| if (!pObj) |
| break; |
| |
| ReplaceIndirectObjectIfHigherGeneration(objnum, std::move(pObj)); |
| word = parser.GetNextWord(nullptr); |
| if (word != "endobj") |
| break; |
| } else { |
| if (word != "trailer") |
| break; |
| |
| if (CPDF_Dictionary* pMainDict = |
| ToDictionary(parser.GetObject(this, 0, 0, true))) { |
| m_pRootDict = pMainDict->GetDictFor("Root"); |
| delete pMainDict; |
| } |
| break; |
| } |
| } |
| } |
| |
| bool CFDF_Document::WriteBuf(CFX_ByteTextBuf& buf) const { |
| if (!m_pRootDict) |
| return false; |
| |
| buf << "%FDF-1.2\r\n"; |
| for (const auto& pair : *this) |
| buf << pair.first << " 0 obj\r\n" |
| << pair.second.get() << "\r\nendobj\r\n\r\n"; |
| |
| buf << "trailer\r\n<</Root " << m_pRootDict->GetObjNum() |
| << " 0 R>>\r\n%%EOF\r\n"; |
| return true; |
| } |