1 files changed, 102 insertions, 0 deletions
diff --git a/core/fpdfapi/parser/cfdf_document.cpp b/core/fpdfapi/parser/cfdf_document.cpp
new file mode 100644
index 0000000000..a1518dfed0
--- /dev/null
+++ b/core/fpdfapi/parser/cfdf_document.cpp
@@ -0,0 +1,102 @@
+// 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_FileRead* pFile, FX_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_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) {
+      uint32_t objnum = FXSYS_atoui(word.c_str());
+      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;
+
+      ReplaceIndirectObjectIfHigherGeneration(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->GetDictFor("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 : *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;
+}