Split off CPDF_Parser and CPDF_SimpleParser into .h/.cpp files

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_CryptoHandler;
+class CPDF_Dictionary;
+class CPDF_Document;
+class CPDF_IndirectObjectHolder;
+class CPDF_Object;
+class CPDF_StreamAcc;
+class CPDF_SyntaxParser;
+class IFX_FileRead;
+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);
+  CPDF_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;
+  FX_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_