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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 #include "JBig2_ArithIntDecoder.h" | 7 #include "JBig2_ArithIntDecoder.h" |
8 | 8 |
9 #include "../../../include/fxcrt/fx_basic.h" | 9 #include "core/include/fxcrt/fx_basic.h" |
10 | 10 |
11 namespace { | 11 namespace { |
12 | 12 |
13 int ShiftOr(int val, int bitwise_or_val) { | 13 int ShiftOr(int val, int bitwise_or_val) { |
14 return (val << 1) | bitwise_or_val; | 14 return (val << 1) | bitwise_or_val; |
15 } | 15 } |
16 | 16 |
17 const struct ArithIntDecodeData { | 17 const struct ArithIntDecodeData { |
18 int nNeedBits; | 18 int nNeedBits; |
19 int nValue; | 19 int nValue; |
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88 void CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder, | 88 void CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder, |
89 FX_DWORD* nResult) { | 89 FX_DWORD* nResult) { |
90 int PREV = 1; | 90 int PREV = 1; |
91 for (unsigned char i = 0; i < SBSYMCODELEN; ++i) { | 91 for (unsigned char i = 0; i < SBSYMCODELEN; ++i) { |
92 JBig2ArithCtx* pCX = &m_IAID[PREV]; | 92 JBig2ArithCtx* pCX = &m_IAID[PREV]; |
93 int D = pArithDecoder->DECODE(pCX); | 93 int D = pArithDecoder->DECODE(pCX); |
94 PREV = ShiftOr(PREV, D); | 94 PREV = ShiftOr(PREV, D); |
95 } | 95 } |
96 *nResult = PREV - (1 << SBSYMCODELEN); | 96 *nResult = PREV - (1 << SBSYMCODELEN); |
97 } | 97 } |
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