Move core/fpdfapi/fpdf_parser to core/fpdfapi/parser

core/fpdfapi/fpdf_parser/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_FPDFAPI_FPDF_PARSER_CPDF_PARSER_H_
-#define CORE_FPDFAPI_FPDF_PARSER_CPDF_PARSER_H_
-
-#include <map>
-#include <memory>
-#include <set>
-
-#include "core/fxcrt/fx_basic.h"
-
-class CPDF_Array;
-class CPDF_CryptoHandler;
-class CPDF_Dictionary;
-class CPDF_Document;
-class CPDF_IndirectObjectHolder;
-class CPDF_Object;
-class CPDF_SecurityHandler;
-class CPDF_StreamAcc;
-class CPDF_SyntaxParser;
-class IFX_FileRead;
-
-class CPDF_Parser {
- public:
-  enum Error {
-    SUCCESS = 0,
-    FILE_ERROR,
-    FORMAT_ERROR,
-    PASSWORD_ERROR,
-    HANDLER_ERROR
-  };
-
-  // A limit on the maximum object number in the xref table. Theoretical limits
-  // are higher, but this may be large enough in practice.
-  static const uint32_t kMaxObjectNumber = 1048576;
-
-  CPDF_Parser();
-  ~CPDF_Parser();
-
-  Error StartParse(IFX_FileRead* pFile, CPDF_Document* pDocument);
-  Error StartLinearizedParse(IFX_FileRead* pFile, CPDF_Document* pDocument);
-
-  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; }
-
-  uint32_t GetPermissions() const;
-  uint32_t GetRootObjNum();
-  uint32_t GetInfoObjNum();
-  CPDF_Array* GetIDArray();
-
-  CPDF_Dictionary* GetEncryptDict() const { return m_pEncryptDict; }
-
-  CPDF_Object* ParseIndirectObject(CPDF_IndirectObjectHolder* pObjList,
-                                   uint32_t objnum);
-
-  uint32_t GetLastObjNum() const;
-  bool IsValidObjectNumber(uint32_t objnum) const;
-  FX_FILESIZE GetObjectPositionOrZero(uint32_t objnum) const;
-  uint8_t GetObjectType(uint32_t objnum) const;
-  uint16_t GetObjectGenNum(uint32_t objnum) const;
-  bool IsVersionUpdated() const { return m_bVersionUpdated; }
-  bool IsObjectFreeOrNull(uint32_t objnum) const;
-  CPDF_CryptoHandler* GetCryptoHandler();
-  IFX_FileRead* GetFileAccess() const;
-
-  FX_FILESIZE GetObjectOffset(uint32_t objnum) const;
-  FX_FILESIZE GetObjectSize(uint32_t objnum) const;
-
-  void GetIndirectBinary(uint32_t objnum, uint8_t*& pBuffer, uint32_t& size);
-  int GetFileVersion() const { return m_FileVersion; }
-  FX_BOOL IsXRefStream() const { return m_bXRefStream; }
-
-  CPDF_Object* ParseIndirectObjectAt(CPDF_IndirectObjectHolder* pObjList,
-                                     FX_FILESIZE pos,
-                                     uint32_t objnum);
-
-  CPDF_Object* ParseIndirectObjectAtByStrict(
-      CPDF_IndirectObjectHolder* pObjList,
-      FX_FILESIZE pos,
-      uint32_t objnum,
-      FX_FILESIZE* pResultPos);
-
-  uint32_t GetFirstPageNo() const { return m_dwFirstPageNo; }
-
- protected:
-  struct ObjectInfo {
-    ObjectInfo() : pos(0), type(0), gennum(0) {}
-
-    FX_FILESIZE pos;
-    uint8_t type;
-    uint16_t gennum;
-  };
-
-  std::unique_ptr<CPDF_SyntaxParser> m_pSyntax;
-  std::map<uint32_t, ObjectInfo> m_ObjectInfo;
-
-  bool LoadCrossRefV4(FX_FILESIZE pos, FX_FILESIZE streampos, FX_BOOL bSkip);
-  FX_BOOL RebuildCrossRef();
-
- private:
-  friend class CPDF_DataAvail;
-
-  enum class ParserState {
-    kDefault,
-    kComment,
-    kWhitespace,
-    kString,
-    kHexString,
-    kEscapedString,
-    kXref,
-    kObjNum,
-    kPostObjNum,
-    kGenNum,
-    kPostGenNum,
-    kTrailer,
-    kBeginObj,
-    kEndObj
-  };
-
-  CPDF_Object* ParseDirect(CPDF_Object* pObj);
-  FX_BOOL LoadAllCrossRefV4(FX_FILESIZE pos);
-  FX_BOOL LoadAllCrossRefV5(FX_FILESIZE pos);
-  FX_BOOL LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef);
-  CPDF_Dictionary* LoadTrailerV4();
-  Error SetEncryptHandler();
-  void ReleaseEncryptHandler();
-  FX_BOOL LoadLinearizedAllCrossRefV4(FX_FILESIZE pos, uint32_t dwObjCount);
-  FX_BOOL LoadLinearizedCrossRefV4(FX_FILESIZE pos, uint32_t dwObjCount);
-  FX_BOOL LoadLinearizedAllCrossRefV5(FX_FILESIZE pos);
-  Error LoadLinearizedMainXRefTable();
-  CPDF_StreamAcc* GetObjectStream(uint32_t number);
-  FX_BOOL IsLinearizedFile(IFX_FileRead* pFileAccess, uint32_t offset);
-  void SetEncryptDictionary(CPDF_Dictionary* pDict);
-  void ShrinkObjectMap(uint32_t size);
-  // A simple check whether the cross reference table matches with
-  // the objects.
-  bool VerifyCrossRefV4();
-
-  CPDF_Document* m_pDocument;  // not owned
-  bool m_bHasParsed;
-  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<CPDF_SecurityHandler> m_pSecurityHandler;
-  CFX_ByteString m_Password;
-  std::set<FX_FILESIZE> m_SortedOffset;
-  CFX_ArrayTemplate<CPDF_Dictionary*> m_Trailers;
-  bool m_bVersionUpdated;
-  CPDF_Object* m_pLinearized;
-  uint32_t m_dwFirstPageNo;
-  uint32_t m_dwXrefStartObjNum;
-
-  // A map of object numbers to indirect streams. Map owns the streams.
-  std::map<uint32_t, 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<uint32_t, uint32_t>;
-
-  // 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<uint32_t> m_ParsingObjNums;
-};
-
-#endif  // CORE_FPDFAPI_FPDF_PARSER_CPDF_PARSER_H_