text: // Copyright 2016 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/cpdf_object.h"
  
  #include <algorithm>
  
  #include "core/fpdfapi/parser/cpdf_array.h"
  #include "core/fpdfapi/parser/cpdf_dictionary.h"
  #include "core/fpdfapi/parser/cpdf_indirect_object_holder.h"
  #include "core/fpdfapi/parser/cpdf_parser.h"
  #include "core/fpdfapi/parser/fpdf_parser_decode.h"
  #include "core/fxcrt/fx_string.h"
  #include "third_party/base/logging.h"
  #include "third_party/base/stl_util.h"
  
  CPDF_Object::~CPDF_Object() {}
  
  CPDF_Object* CPDF_Object::GetDirect() const {
    return const_cast<CPDF_Object*>(this);
  }
  
  std::unique_ptr<CPDF_Object> CPDF_Object::CloneObjectNonCyclic(
      bool bDirect) const {
    std::set<const CPDF_Object*> visited_objs;
    return CloneNonCyclic(bDirect, &visited_objs);
  }
  
  std::unique_ptr<CPDF_Object> CPDF_Object::CloneDirectObject() const {
    return CloneObjectNonCyclic(true);
  }
  
  std::unique_ptr<CPDF_Object> CPDF_Object::CloneNonCyclic(
      bool bDirect,
      std::set<const CPDF_Object*>* pVisited) const {
    return Clone();
  }
  
  CFX_ByteString CPDF_Object::GetString() const {
    return CFX_ByteString();
  }
  
  CFX_WideString CPDF_Object::GetUnicodeText() const {
    return CFX_WideString();
  }
  
  float CPDF_Object::GetNumber() const {
    return 0;
  }
  
  int CPDF_Object::GetInteger() const {
    return 0;
  }
  
  CPDF_Dictionary* CPDF_Object::GetDict() const {
    return nullptr;
  }
  
  void CPDF_Object::SetString(const CFX_ByteString& str) {
    NOTREACHED();
  }
  
  bool CPDF_Object::IsArray() const {
    return false;
  }
  
  bool CPDF_Object::IsBoolean() const {
    return false;
  }
  
  bool CPDF_Object::IsDictionary() const {
    return false;
  }
  
  bool CPDF_Object::IsName() const {
    return false;
  }
  
  bool CPDF_Object::IsNumber() const {
    return false;
  }
  
  bool CPDF_Object::IsReference() const {
    return false;
  }
  
  bool CPDF_Object::IsStream() const {
    return false;
  }
  
  bool CPDF_Object::IsString() const {
    return false;
  }
  
  CPDF_Array* CPDF_Object::AsArray() {
    return nullptr;
  }
  
  const CPDF_Array* CPDF_Object::AsArray() const {
    return nullptr;
  }
  
  CPDF_Boolean* CPDF_Object::AsBoolean() {
    return nullptr;
  }
  
  const CPDF_Boolean* CPDF_Object::AsBoolean() const {
    return nullptr;
  }
  
  CPDF_Dictionary* CPDF_Object::AsDictionary() {
    return nullptr;
  }
  
  const CPDF_Dictionary* CPDF_Object::AsDictionary() const {
    return nullptr;
  }
  
  CPDF_Name* CPDF_Object::AsName() {
    return nullptr;
  }
  
  const CPDF_Name* CPDF_Object::AsName() const {
    return nullptr;
  }
  
  CPDF_Number* CPDF_Object::AsNumber() {
    return nullptr;
  }
  
  const CPDF_Number* CPDF_Object::AsNumber() const {
    return nullptr;
  }
  
  CPDF_Reference* CPDF_Object::AsReference() {
    return nullptr;
  }
  
  const CPDF_Reference* CPDF_Object::AsReference() const {
    return nullptr;
  }
  
  CPDF_Stream* CPDF_Object::AsStream() {
    return nullptr;
  }
  
  const CPDF_Stream* CPDF_Object::AsStream() const {
    return nullptr;
  }
  
  CPDF_String* CPDF_Object::AsString() {
    return nullptr;
  }
  
  const CPDF_String* CPDF_Object::AsString() const {
    return nullptr;
  }
  