core/include/fdpfapi cleanup Part I.

core/include/fpdfapi/cpdf_parser.h

-// 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
-
-#ifndef CORE_INCLUDE_FPDFAPI_CPDF_PARSER_H_
-#define CORE_INCLUDE_FPDFAPI_CPDF_PARSER_H_
-
-#include <map>
-#include <memory>
-#include <set>
-
-#include "core/include/fxcrt/fx_basic.h"
-
-class CPDF_Array;
-class CPDF_Dictionary;
-class CPDF_Document;
-class CPDF_IndirectObjectHolder;
-class CPDF_Object;
-class CPDF_StreamAcc;
-class CPDF_SyntaxParser;
-class IFX_FileRead;
-class IPDF_CryptoHandler;
-class IPDF_SecurityHandler;
-
-class CPDF_Parser {
- public:
-  enum Error {
-    SUCCESS = 0,
-    FILE_ERROR,
-    FORMAT_ERROR,
-    PASSWORD_ERROR,
-    HANDLER_ERROR
-  };
-
-  CPDF_Parser();
-  ~CPDF_Parser();
-
-  Error StartParse(IFX_FileRead* pFile);
-  FX_DWORD GetPermissions(FX_BOOL bCheckRevision = FALSE);
-
-  void SetPassword(const FX_CHAR* password) { m_Password = password; }
-  CFX_ByteString GetPassword() { return m_Password; }
-  CPDF_Dictionary* GetTrailer() const { return m_pTrailer; }
-  FX_FILESIZE GetLastXRefOffset() const { return m_LastXRefOffset; }
-  CPDF_Document* GetDocument() const { return m_pDocument; }
-
-  FX_DWORD GetRootObjNum();
-  FX_DWORD GetInfoObjNum();
-  CPDF_Array* GetIDArray();
-
-  CPDF_Dictionary* GetEncryptDict() const { return m_pEncryptDict; }
-
-  CPDF_Object* ParseIndirectObject(CPDF_IndirectObjectHolder* pObjList,
-                                   FX_DWORD objnum);
-
-  FX_DWORD GetLastObjNum() const;
-  bool IsValidObjectNumber(FX_DWORD objnum) const;
-  FX_FILESIZE GetObjectPositionOrZero(FX_DWORD objnum) const;
-  uint8_t GetObjectType(FX_DWORD objnum) const;
-  uint16_t GetObjectGenNum(FX_DWORD objnum) const;
-  bool IsVersionUpdated() const { return m_bVersionUpdated; }
-  bool IsObjectFreeOrNull(FX_DWORD objnum) const;
-  FX_BOOL IsFormStream(FX_DWORD objnum, FX_BOOL& bForm);
-  IPDF_CryptoHandler* GetCryptoHandler();
-  IFX_FileRead* GetFileAccess() const;
-
-  FX_FILESIZE GetObjectOffset(FX_DWORD objnum) const;
-  FX_FILESIZE GetObjectSize(FX_DWORD objnum) const;
-
-  void GetIndirectBinary(FX_DWORD objnum, uint8_t*& pBuffer, FX_DWORD& size);
-  int GetFileVersion() const { return m_FileVersion; }
-  FX_BOOL IsXRefStream() const { return m_bXRefStream; }
-
-  CPDF_Object* ParseIndirectObjectAt(CPDF_IndirectObjectHolder* pObjList,
-                                     FX_FILESIZE pos,
-                                     FX_DWORD objnum);
-
-  CPDF_Object* ParseIndirectObjectAtByStrict(
-      CPDF_IndirectObjectHolder* pObjList,
-      FX_FILESIZE pos,
-      FX_DWORD objnum,
-      FX_FILESIZE* pResultPos);
-
-  Error StartAsyncParse(IFX_FileRead* pFile);
-
-  FX_DWORD GetFirstPageNo() const { return m_dwFirstPageNo; }
-
- protected:
-  struct ObjectInfo {
-    ObjectInfo() : pos(0), type(0), gennum(0) {}
-
-    FX_FILESIZE pos;
-    uint8_t type;
-    uint16_t gennum;
-  };
-
-  void CloseParser();
-  CPDF_Object* ParseDirect(CPDF_Object* pObj);
-  FX_BOOL LoadAllCrossRefV4(FX_FILESIZE pos);
-  FX_BOOL LoadAllCrossRefV5(FX_FILESIZE pos);
-  bool LoadCrossRefV4(FX_FILESIZE pos, FX_FILESIZE streampos, FX_BOOL bSkip);
-  FX_BOOL LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef);
-  CPDF_Dictionary* LoadTrailerV4();
-  FX_BOOL RebuildCrossRef();
-  Error SetEncryptHandler();
-  void ReleaseEncryptHandler();
-  FX_BOOL LoadLinearizedAllCrossRefV4(FX_FILESIZE pos, FX_DWORD dwObjCount);
-  FX_BOOL LoadLinearizedCrossRefV4(FX_FILESIZE pos, FX_DWORD dwObjCount);
-  FX_BOOL LoadLinearizedAllCrossRefV5(FX_FILESIZE pos);
-  Error LoadLinearizedMainXRefTable();
-  CPDF_StreamAcc* GetObjectStream(FX_DWORD number);
-  FX_BOOL IsLinearizedFile(IFX_FileRead* pFileAccess, FX_DWORD offset);
-  void SetEncryptDictionary(CPDF_Dictionary* pDict);
-  void ShrinkObjectMap(FX_DWORD size);
-
-  CPDF_Document* m_pDocument;
-  std::unique_ptr<CPDF_SyntaxParser> m_pSyntax;
-  bool m_bOwnFileRead;
-  int m_FileVersion;
-  CPDF_Dictionary* m_pTrailer;
-  CPDF_Dictionary* m_pEncryptDict;
-  FX_FILESIZE m_LastXRefOffset;
-  FX_BOOL m_bXRefStream;
-  std::unique_ptr<IPDF_SecurityHandler> m_pSecurityHandler;
-  CFX_ByteString m_bsRecipient;
-  CFX_ByteString m_FilePath;
-  CFX_ByteString m_Password;
-  std::map<FX_DWORD, ObjectInfo> m_ObjectInfo;
-  std::set<FX_FILESIZE> m_SortedOffset;
-  CFX_ArrayTemplate<CPDF_Dictionary*> m_Trailers;
-  bool m_bVersionUpdated;
-  CPDF_Object* m_pLinearized;
-  FX_DWORD m_dwFirstPageNo;
-  FX_DWORD m_dwXrefStartObjNum;
-
-  // A map of object numbers to indirect streams. Map owns the streams.
-  std::map<FX_DWORD, std::unique_ptr<CPDF_StreamAcc>> m_ObjectStreamMap;
-
-  // Mapping of object numbers to offsets. The offsets are relative to the first
-  // object in the stream.
-  using StreamObjectCache = std::map<FX_DWORD, FX_DWORD>;
-
-  // Mapping of streams to their object caches. This is valid as long as the
-  // streams in |m_ObjectStreamMap| are valid.
-  std::map<CPDF_StreamAcc*, StreamObjectCache> m_ObjCache;
-
-  // All indirect object numbers that are being parsed.
-  std::set<FX_DWORD> m_ParsingObjNums;
-
-  friend class CPDF_DataAvail;
-
- private:
-  enum class ParserState {
-    kDefault,
-    kComment,
-    kWhitespace,
-    kString,
-    kHexString,
-    kEscapedString,
-    kXref,
-    kObjNum,
-    kPostObjNum,
-    kGenNum,
-    kPostGenNum,
-    kTrailer,
-    kBeginObj,
-    kEndObj
-  };
-};
-
-#endif  // CORE_INCLUDE_FPDFAPI_CPDF_PARSER_H_