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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/fpdf_parser/include/cfdf_document.h"
#include "core/fpdfapi/fpdf_edit/include/cpdf_creator.h"
#include "core/fpdfapi/fpdf_parser/cpdf_syntax_parser.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
CFDF_Document::CFDF_Document() : CPDF_IndirectObjectHolder(NULL) {
m_pRootDict = NULL;
m_pFile = NULL;
m_bOwnFile = FALSE;
}
CFDF_Document::~CFDF_Document() {
if (m_bOwnFile && m_pFile) {
m_pFile->Release();
}
}
CFDF_Document* CFDF_Document::CreateNewDoc() {
CFDF_Document* pDoc = new CFDF_Document;
pDoc->m_pRootDict = new CPDF_Dictionary;
pDoc->AddIndirectObject(pDoc->m_pRootDict);
CPDF_Dictionary* pFDFDict = new CPDF_Dictionary;
pDoc->m_pRootDict->SetAt("FDF", pFDFDict);
return pDoc;
}
CFDF_Document* CFDF_Document::ParseFile(IFX_FileRead* pFile, FX_BOOL bOwnFile) {
if (!pFile) {
return NULL;
}
CFDF_Document* pDoc = new CFDF_Document;
pDoc->ParseStream(pFile, bOwnFile);
if (!pDoc->m_pRootDict) {
delete pDoc;
return NULL;
}
return pDoc;
}
CFDF_Document* CFDF_Document::ParseMemory(const uint8_t* pData, FX_DWORD size) {
return CFDF_Document::ParseFile(FX_CreateMemoryStream((uint8_t*)pData, size),
TRUE);
}
void CFDF_Document::ParseStream(IFX_FileRead* pFile, FX_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) {
FX_DWORD objnum = FXSYS_atoui(word);
word = parser.GetNextWord(&bNumber);
if (!bNumber) {
break;
}
word = parser.GetNextWord(nullptr);
if (word != "obj") {
break;
}
CPDF_Object* pObj = parser.GetObject(this, objnum, 0, true);
if (!pObj) {
break;
}
InsertIndirectObject(objnum, 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->GetDictBy("Root");
pMainDict->Release();
}
break;
}
}
}
FX_BOOL CFDF_Document::WriteBuf(CFX_ByteTextBuf& buf) const {
if (!m_pRootDict) {
return FALSE;
}
buf << "%FDF-1.2\r\n";
for (const auto& pair : m_IndirectObjs) {
buf << pair.first << " 0 obj\r\n" << pair.second << "\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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