| // 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_PAGE_CPDF_STREAMPARSER_H_ |
| #define CORE_FPDFAPI_PAGE_CPDF_STREAMPARSER_H_ |
| |
| #include "core/fxcrt/string_pool_template.h" |
| #include "core/fxcrt/weak_ptr.h" |
| #include "third_party/base/span.h" |
| |
| class CPDF_Dictionary; |
| class CPDF_Document; |
| class CPDF_Object; |
| class CPDF_Stream; |
| |
| class CPDF_StreamParser { |
| public: |
| enum SyntaxType { EndOfData, Number, Keyword, Name, Others }; |
| |
| explicit CPDF_StreamParser(pdfium::span<const uint8_t> span); |
| CPDF_StreamParser(pdfium::span<const uint8_t> span, |
| const WeakPtr<ByteStringPool>& pPool); |
| ~CPDF_StreamParser(); |
| |
| SyntaxType ParseNextElement(); |
| ByteStringView GetWord() const { |
| return ByteStringView(m_WordBuffer, m_WordSize); |
| } |
| uint32_t GetPos() const { return m_Pos; } |
| void SetPos(uint32_t pos) { m_Pos = pos; } |
| const RetainPtr<CPDF_Object>& GetObject() const { return m_pLastObj; } |
| RetainPtr<CPDF_Object> ReadNextObject(bool bAllowNestedArray, |
| bool bInArray, |
| uint32_t dwRecursionLevel); |
| RetainPtr<CPDF_Stream> ReadInlineStream(CPDF_Document* pDoc, |
| RetainPtr<CPDF_Dictionary> pDict, |
| const CPDF_Object* pCSObj); |
| |
| private: |
| friend class cpdf_streamparser_ReadHexString_Test; |
| static constexpr uint32_t kMaxWordLength = 255; |
| |
| void GetNextWord(bool& bIsNumber); |
| ByteString ReadString(); |
| ByteString ReadHexString(); |
| bool PositionIsInBounds() const; |
| bool WordBufferMatches(const char* pWord) const; |
| |
| uint32_t m_Pos = 0; // Current byte position within |m_pBuf|. |
| uint32_t m_WordSize = 0; // Current byte position within |m_WordBuffer|. |
| WeakPtr<ByteStringPool> m_pPool; |
| RetainPtr<CPDF_Object> m_pLastObj; |
| pdfium::span<const uint8_t> m_pBuf; |
| uint8_t m_WordBuffer[kMaxWordLength + 1]; // Include space for NUL. |
| }; |
| |
| #endif // CORE_FPDFAPI_PAGE_CPDF_STREAMPARSER_H_ |