// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef CORE_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
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#define CORE_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
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#include <memory>
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#include "core/fxcrt/include/fx_basic.h"
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class CPDF_CryptoHandler;
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class CPDF_Dictionary;
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class CPDF_IndirectObjectHolder;
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class CPDF_Object;
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class CPDF_Stream;
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class IFX_FileRead;
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class CPDF_SyntaxParser {
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public:
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CPDF_SyntaxParser();
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~CPDF_SyntaxParser();
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void InitParser(IFX_FileRead* pFileAccess, uint32_t HeaderOffset);
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FX_FILESIZE SavePos() const { return m_Pos; }
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void RestorePos(FX_FILESIZE pos) { m_Pos = pos; }
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CPDF_Object* GetObject(CPDF_IndirectObjectHolder* pObjList,
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uint32_t objnum,
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uint32_t gennum,
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FX_BOOL bDecrypt);
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CPDF_Object* GetObjectByStrict(CPDF_IndirectObjectHolder* pObjList,
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uint32_t objnum,
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uint32_t gennum);
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CFX_ByteString GetKeyword();
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void ToNextLine();
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void ToNextWord();
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FX_BOOL SearchWord(const CFX_ByteStringC& word,
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FX_BOOL bWholeWord,
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FX_BOOL bForward,
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FX_FILESIZE limit);
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int SearchMultiWord(const CFX_ByteStringC& words,
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FX_BOOL bWholeWord,
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FX_FILESIZE limit);
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FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);
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void SetEncrypt(std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler);
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FX_BOOL ReadBlock(uint8_t* pBuf, uint32_t size);
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FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
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CFX_ByteString GetNextWord(bool* bIsNumber);
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private:
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friend class CPDF_Parser;
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friend class CPDF_DataAvail;
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friend class cpdf_syntax_parser_ReadHexString_Test;
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static const int kParserMaxRecursionDepth = 64;
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static int s_CurrentRecursionDepth;
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uint32_t GetDirectNum();
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FX_BOOL GetNextChar(uint8_t& ch);
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FX_BOOL GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch);
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void GetNextWordInternal(bool* bIsNumber);
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bool IsWholeWord(FX_FILESIZE startpos,
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FX_FILESIZE limit,
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const CFX_ByteStringC& tag,
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FX_BOOL checkKeyword);
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CFX_ByteString ReadString();
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CFX_ByteString ReadHexString();
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unsigned int ReadEOLMarkers(FX_FILESIZE pos);
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CPDF_Stream* ReadStream(CPDF_Dictionary* pDict,
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uint32_t objnum,
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uint32_t gennum);
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FX_FILESIZE m_Pos;
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int m_MetadataObjnum;
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IFX_FileRead* m_pFileAccess;
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FX_FILESIZE m_HeaderOffset;
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FX_FILESIZE m_FileLen;
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uint8_t* m_pFileBuf;
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uint32_t m_BufSize;
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FX_FILESIZE m_BufOffset;
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std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
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uint8_t m_WordBuffer[257];
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uint32_t m_WordSize;
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};
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#endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
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