// Copyright 2014 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_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ #define CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ #include "core/fxcrt/cfx_retain_ptr.h" #include "core/fxcrt/fx_basic.h" class CPDF_StreamAcc; class CJBig2_BitStream { public: explicit CJBig2_BitStream(const CFX_RetainPtr<CPDF_StreamAcc>& pSrcStream); ~CJBig2_BitStream(); // TODO(thestig): readFoo() should return bool. int32_t readNBits(uint32_t nBits, uint32_t* dwResult); int32_t readNBits(uint32_t nBits, int32_t* nResult); int32_t read1Bit(uint32_t* dwResult); int32_t read1Bit(bool* bResult); int32_t read1Byte(uint8_t* cResult); int32_t readInteger(uint32_t* dwResult); int32_t readShortInteger(uint16_t* wResult); void alignByte(); uint8_t getCurByte() const; void incByteIdx(); uint8_t getCurByte_arith() const; uint8_t getNextByte_arith() const; uint32_t getOffset() const; void setOffset(uint32_t dwOffset); uint32_t getBitPos() const; void setBitPos(uint32_t dwBitPos); const uint8_t* getBuf() const; uint32_t getLength() const { return m_dwLength; } const uint8_t* getPointer() const; void offset(uint32_t dwOffset); uint32_t getByteLeft() const; uint32_t getObjNum() const; bool IsInBounds() const; private: void AdvanceBit(); uint32_t LengthInBits() const; const uint8_t* m_pBuf; uint32_t m_dwLength; uint32_t m_dwByteIdx; uint32_t m_dwBitIdx; const uint32_t m_dwObjNum; CJBig2_BitStream(const CJBig2_BitStream&) = delete; void operator=(const CJBig2_BitStream&) = delete; }; #endif // CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_