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1 // Copyright 2016 PDFium Authors. All rights reserved. | 1 // Copyright 2016 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/fpdfapi/parser/cpdf_hint_tables.h" | 7 #include "core/fpdfapi/parser/cpdf_hint_tables.h" |
8 | 8 |
9 #include <limits> | 9 #include <limits> |
10 | 10 |
11 #include "core/fpdfapi/parser/cpdf_array.h" | 11 #include "core/fpdfapi/parser/cpdf_array.h" |
12 #include "core/fpdfapi/parser/cpdf_data_avail.h" | 12 #include "core/fpdfapi/parser/cpdf_data_avail.h" |
13 #include "core/fpdfapi/parser/cpdf_dictionary.h" | 13 #include "core/fpdfapi/parser/cpdf_dictionary.h" |
14 #include "core/fpdfapi/parser/cpdf_document.h" | 14 #include "core/fpdfapi/parser/cpdf_document.h" |
15 #include "core/fpdfapi/parser/cpdf_linearized.h" | 15 #include "core/fpdfapi/parser/cpdf_linearized_header.h" |
16 #include "core/fpdfapi/parser/cpdf_stream.h" | 16 #include "core/fpdfapi/parser/cpdf_stream.h" |
17 #include "core/fpdfapi/parser/cpdf_stream_acc.h" | 17 #include "core/fpdfapi/parser/cpdf_stream_acc.h" |
18 #include "core/fxcrt/fx_safe_types.h" | 18 #include "core/fxcrt/fx_safe_types.h" |
19 #include "third_party/base/numerics/safe_conversions.h" | 19 #include "third_party/base/numerics/safe_conversions.h" |
20 | 20 |
21 namespace { | 21 namespace { |
22 | 22 |
23 bool CanReadFromBitStream(const CFX_BitStream* hStream, | 23 bool CanReadFromBitStream(const CFX_BitStream* hStream, |
24 const FX_SAFE_UINT32& bits) { | 24 const FX_SAFE_UINT32& bits) { |
25 return bits.IsValid() && hStream->BitsRemaining() >= bits.ValueOrDie(); | 25 return bits.IsValid() && hStream->BitsRemaining() >= bits.ValueOrDie(); |
26 } | 26 } |
27 | 27 |
28 // Sanity check values from the page table header. The note in the PDF 1.7 | 28 // Sanity check values from the page table header. The note in the PDF 1.7 |
29 // reference for Table F.3 says the valid range is only 0 through 32. Though 0 | 29 // reference for Table F.3 says the valid range is only 0 through 32. Though 0 |
30 // is not useful either. | 30 // is not useful either. |
31 bool IsValidPageOffsetHintTableBitCount(uint32_t bits) { | 31 bool IsValidPageOffsetHintTableBitCount(uint32_t bits) { |
32 return bits > 0 && bits <= 32; | 32 return bits > 0 && bits <= 32; |
33 } | 33 } |
34 | 34 |
35 } // namespace | 35 } // namespace |
36 | 36 |
37 CPDF_HintTables::CPDF_HintTables(CPDF_DataAvail* pDataAvail, | 37 CPDF_HintTables::CPDF_HintTables(CPDF_DataAvail* pDataAvail, |
38 CPDF_Linearized* pLinearized) | 38 CPDF_LinearizedHeader* pLinearized) |
39 : m_pDataAvail(pDataAvail), | 39 : m_pDataAvail(pDataAvail), |
40 m_pLinearized(pLinearized), | 40 m_pLinearized(pLinearized), |
41 m_nFirstPageSharedObjs(0), | 41 m_nFirstPageSharedObjs(0), |
42 m_szFirstPageObjOffset(0) { | 42 m_szFirstPageObjOffset(0) { |
43 ASSERT(m_pLinearized); | 43 ASSERT(m_pLinearized); |
44 } | 44 } |
45 | 45 |
46 CPDF_HintTables::~CPDF_HintTables() {} | 46 CPDF_HintTables::~CPDF_HintTables() {} |
47 | 47 |
48 uint32_t CPDF_HintTables::GetItemLength( | 48 uint32_t CPDF_HintTables::GetItemLength( |
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503 return static_cast<int>(m_pLinearized->GetFirstPageNo()); | 503 return static_cast<int>(m_pLinearized->GetFirstPageNo()); |
504 } | 504 } |
505 | 505 |
506 int CPDF_HintTables::ReadPrimaryHintStreamOffset() const { | 506 int CPDF_HintTables::ReadPrimaryHintStreamOffset() const { |
507 return static_cast<int>(m_pLinearized->GetHintStart()); | 507 return static_cast<int>(m_pLinearized->GetHintStart()); |
508 } | 508 } |
509 | 509 |
510 int CPDF_HintTables::ReadPrimaryHintStreamLength() const { | 510 int CPDF_HintTables::ReadPrimaryHintStreamLength() const { |
511 return static_cast<int>(m_pLinearized->GetHintLength()); | 511 return static_cast<int>(m_pLinearized->GetHintLength()); |
512 } | 512 } |
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