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Diffstat (limited to 'core/fpdfapi/parser/cpdf_syntax_parser.h')
-rw-r--r-- | core/fpdfapi/parser/cpdf_syntax_parser.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/core/fpdfapi/parser/cpdf_syntax_parser.h b/core/fpdfapi/parser/cpdf_syntax_parser.h new file mode 100644 index 0000000000..444a94bde1 --- /dev/null +++ b/core/fpdfapi/parser/cpdf_syntax_parser.h @@ -0,0 +1,101 @@ +// 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_PARSER_CPDF_SYNTAX_PARSER_H_ +#define CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_ + +#include <memory> + +#include "core/fxcrt/cfx_string_pool_template.h" +#include "core/fxcrt/cfx_weak_ptr.h" +#include "core/fxcrt/fx_basic.h" + +class CPDF_CryptoHandler; +class CPDF_Dictionary; +class CPDF_IndirectObjectHolder; +class CPDF_Object; +class CPDF_Stream; +class IFX_FileRead; + +class CPDF_SyntaxParser { + public: + CPDF_SyntaxParser(); + explicit CPDF_SyntaxParser(const CFX_WeakPtr<CFX_ByteStringPool>& pPool); + ~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* GetObjectForStrict(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<CPDF_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); + + CFX_ByteString MaybeIntern(const CFX_ByteString& str); + + FX_FILESIZE m_Pos; + int m_MetadataObjnum; + IFX_FileRead* m_pFileAccess; + FX_FILESIZE m_HeaderOffset; + FX_FILESIZE m_FileLen; + uint8_t* m_pFileBuf; + uint32_t m_BufSize; + FX_FILESIZE m_BufOffset; + std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler; + uint8_t m_WordBuffer[257]; + uint32_t m_WordSize; + CFX_WeakPtr<CFX_ByteStringPool> m_pPool; +}; + +#endif // CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_ |