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1 // Copyright 2015 PDFium Authors. All rights reserved. | 1 // Copyright 2015 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 "core/fxcodec/jbig2/JBig2_BitStream.h" | 7 #include "core/fxcodec/jbig2/JBig2_BitStream.h" |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 | 10 |
11 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h" | 11 #include "core/fpdfapi/fpdf_parser/cpdf_stream.h" |
12 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h" | 12 #include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h" |
13 | 13 |
14 CJBig2_BitStream::CJBig2_BitStream(CPDF_StreamAcc* pSrcStream) | 14 CJBig2_BitStream::CJBig2_BitStream(CPDF_StreamAcc* pSrcStream) |
15 : m_pBuf(pSrcStream->GetData()), | 15 : m_pBuf(pSrcStream->GetData()), |
16 m_dwLength(pSrcStream->GetSize()), | 16 m_dwLength(pSrcStream->GetSize()), |
17 m_dwByteIdx(0), | 17 m_dwByteIdx(0), |
18 m_dwBitIdx(0), | 18 m_dwBitIdx(0), |
19 m_dwObjNum(pSrcStream->GetStream() ? pSrcStream->GetStream()->GetObjNum() | 19 m_dwObjNum(pSrcStream->GetStream() ? pSrcStream->GetStream()->GetObjNum() |
20 : 0) { | 20 : 0) { |
21 if (m_dwLength > 256 * 1024 * 1024) { | 21 if (m_dwLength > 256 * 1024 * 1024) { |
22 m_dwLength = 0; | 22 m_dwLength = 0; |
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180 return m_dwByteIdx < m_dwLength; | 180 return m_dwByteIdx < m_dwLength; |
181 } | 181 } |
182 | 182 |
183 uint32_t CJBig2_BitStream::LengthInBits() const { | 183 uint32_t CJBig2_BitStream::LengthInBits() const { |
184 return m_dwLength << 3; | 184 return m_dwLength << 3; |
185 } | 185 } |
186 | 186 |
187 uint32_t CJBig2_BitStream::getObjNum() const { | 187 uint32_t CJBig2_BitStream::getObjNum() const { |
188 return m_dwObjNum; | 188 return m_dwObjNum; |
189 } | 189 } |
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