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// 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;
}
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