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// 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_SYNTAX_PARSER_H_
#define CORE_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
#include <memory>
#include "core/fxcrt/include/fx_basic.h"
class CPDF_Dictionary;
class CPDF_IndirectObjectHolder;
class CPDF_Object;
class CPDF_Stream;
class IFX_FileRead;
class IPDF_CryptoHandler;
class CPDF_SyntaxParser {
public:
CPDF_SyntaxParser();
~CPDF_SyntaxParser();
void InitParser(IFX_FileRead* pFileAccess, uint32_t HeaderOffset);
FX_FILESIZE SavePos() const { return m_Pos; }
void RestorePos(FX_FILESIZE pos) { m_Pos = pos; }
CPDF_Object* GetObject(CPDF_IndirectObjectHolder* pObjList,
uint32_t objnum,
uint32_t gennum,
FX_BOOL bDecrypt);
CPDF_Object* GetObjectByStrict(CPDF_IndirectObjectHolder* pObjList,
uint32_t objnum,
uint32_t gennum);
CFX_ByteString GetKeyword();
void ToNextLine();
void ToNextWord();
FX_BOOL SearchWord(const CFX_ByteStringC& word,
FX_BOOL bWholeWord,
FX_BOOL bForward,
FX_FILESIZE limit);
int SearchMultiWord(const CFX_ByteStringC& words,
FX_BOOL bWholeWord,
FX_FILESIZE limit);
FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);
void SetEncrypt(std::unique_ptr<IPDF_CryptoHandler> pCryptoHandler);
FX_BOOL ReadBlock(uint8_t* pBuf, uint32_t size);
FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
CFX_ByteString GetNextWord(bool* bIsNumber);
private:
friend class CPDF_Parser;
friend class CPDF_DataAvail;
friend class cpdf_syntax_parser_ReadHexString_Test;
static const int kParserMaxRecursionDepth = 64;
static int s_CurrentRecursionDepth;
uint32_t GetDirectNum();
FX_BOOL GetNextChar(uint8_t& ch);
FX_BOOL GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch);
void GetNextWordInternal(bool* bIsNumber);
bool IsWholeWord(FX_FILESIZE startpos,
FX_FILESIZE limit,
const CFX_ByteStringC& tag,
FX_BOOL checkKeyword);
CFX_ByteString ReadString();
CFX_ByteString ReadHexString();
unsigned int ReadEOLMarkers(FX_FILESIZE pos);
CPDF_Stream* ReadStream(CPDF_Dictionary* pDict,
uint32_t objnum,
uint32_t gennum);
FX_FILESIZE m_Pos;
int m_MetadataObjnum;
IFX_FileRead* m_pFileAccess;
uint32_t m_HeaderOffset;
FX_FILESIZE m_FileLen;
uint8_t* m_pFileBuf;
uint32_t m_BufSize;
FX_FILESIZE m_BufOffset;
std::unique_ptr<IPDF_CryptoHandler> m_pCryptoHandler;
uint8_t m_WordBuffer[257];
uint32_t m_WordSize;
};
#endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
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