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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #ifndef CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ | 7 #ifndef CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ |
8 #define CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ | 8 #define CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ |
9 | 9 |
10 #include "core/fxcrt/include/fx_basic.h" | 10 #include "core/fxcrt/include/fx_basic.h" |
11 | 11 |
12 class CPDF_StreamAcc; | 12 class CPDF_StreamAcc; |
13 | 13 |
14 class CJBig2_BitStream { | 14 class CJBig2_BitStream { |
15 public: | 15 public: |
16 explicit CJBig2_BitStream(CPDF_StreamAcc* pSrcStream); | 16 explicit CJBig2_BitStream(CPDF_StreamAcc* pSrcStream); |
17 ~CJBig2_BitStream(); | 17 ~CJBig2_BitStream(); |
18 | 18 |
19 // TODO(thestig): readFoo() should return bool. | 19 // TODO(thestig): readFoo() should return bool. |
20 int32_t readNBits(FX_DWORD nBits, FX_DWORD* dwResult); | 20 int32_t readNBits(uint32_t nBits, uint32_t* dwResult); |
21 int32_t readNBits(FX_DWORD nBits, int32_t* nResult); | 21 int32_t readNBits(uint32_t nBits, int32_t* nResult); |
22 int32_t read1Bit(FX_DWORD* dwResult); | 22 int32_t read1Bit(uint32_t* dwResult); |
23 int32_t read1Bit(FX_BOOL* bResult); | 23 int32_t read1Bit(FX_BOOL* bResult); |
24 int32_t read1Byte(uint8_t* cResult); | 24 int32_t read1Byte(uint8_t* cResult); |
25 int32_t readInteger(FX_DWORD* dwResult); | 25 int32_t readInteger(uint32_t* dwResult); |
26 int32_t readShortInteger(uint16_t* wResult); | 26 int32_t readShortInteger(uint16_t* wResult); |
27 void alignByte(); | 27 void alignByte(); |
28 uint8_t getCurByte() const; | 28 uint8_t getCurByte() const; |
29 void incByteIdx(); | 29 void incByteIdx(); |
30 uint8_t getCurByte_arith() const; | 30 uint8_t getCurByte_arith() const; |
31 uint8_t getNextByte_arith() const; | 31 uint8_t getNextByte_arith() const; |
32 FX_DWORD getOffset() const; | 32 uint32_t getOffset() const; |
33 void setOffset(FX_DWORD dwOffset); | 33 void setOffset(uint32_t dwOffset); |
34 FX_DWORD getBitPos() const; | 34 uint32_t getBitPos() const; |
35 void setBitPos(FX_DWORD dwBitPos); | 35 void setBitPos(uint32_t dwBitPos); |
36 const uint8_t* getBuf() const; | 36 const uint8_t* getBuf() const; |
37 FX_DWORD getLength() const { return m_dwLength; } | 37 uint32_t getLength() const { return m_dwLength; } |
38 const uint8_t* getPointer() const; | 38 const uint8_t* getPointer() const; |
39 void offset(FX_DWORD dwOffset); | 39 void offset(uint32_t dwOffset); |
40 FX_DWORD getByteLeft() const; | 40 uint32_t getByteLeft() const; |
41 FX_DWORD getObjNum() const; | 41 uint32_t getObjNum() const; |
42 | 42 |
43 private: | 43 private: |
44 void AdvanceBit(); | 44 void AdvanceBit(); |
45 bool IsInBound() const; | 45 bool IsInBound() const; |
46 FX_DWORD LengthInBits() const; | 46 uint32_t LengthInBits() const; |
47 | 47 |
48 const uint8_t* m_pBuf; | 48 const uint8_t* m_pBuf; |
49 FX_DWORD m_dwLength; | 49 uint32_t m_dwLength; |
50 FX_DWORD m_dwByteIdx; | 50 uint32_t m_dwByteIdx; |
51 FX_DWORD m_dwBitIdx; | 51 uint32_t m_dwBitIdx; |
52 const FX_DWORD m_dwObjNum; | 52 const uint32_t m_dwObjNum; |
53 | 53 |
54 CJBig2_BitStream(const CJBig2_BitStream&) = delete; | 54 CJBig2_BitStream(const CJBig2_BitStream&) = delete; |
55 void operator=(const CJBig2_BitStream&) = delete; | 55 void operator=(const CJBig2_BitStream&) = delete; |
56 }; | 56 }; |
57 | 57 |
58 #endif // CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ | 58 #endif // CORE_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ |
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