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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/fpdf_parser/cpdf_reference.h" | 7 #include "core/fpdfapi/fpdf_parser/cpdf_reference.h" |
8 | 8 |
9 #include "core/fpdfapi/fpdf_parser/cpdf_indirect_object_holder.h" | 9 #include "core/fpdfapi/fpdf_parser/cpdf_indirect_object_holder.h" |
10 #include "third_party/base/stl_util.h" | 10 #include "third_party/base/stl_util.h" |
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60 pVisited->insert(this); | 60 pVisited->insert(this); |
61 if (bDirect) { | 61 if (bDirect) { |
62 auto* pDirect = GetDirect(); | 62 auto* pDirect = GetDirect(); |
63 return pDirect && !pdfium::ContainsKey(*pVisited, pDirect) | 63 return pDirect && !pdfium::ContainsKey(*pVisited, pDirect) |
64 ? pDirect->CloneNonCyclic(true, pVisited) | 64 ? pDirect->CloneNonCyclic(true, pVisited) |
65 : nullptr; | 65 : nullptr; |
66 } | 66 } |
67 return new CPDF_Reference(m_pObjList, m_RefObjNum); | 67 return new CPDF_Reference(m_pObjList, m_RefObjNum); |
68 } | 68 } |
69 | 69 |
| 70 CPDF_Object* CPDF_Reference::SafeGetDirect() const { |
| 71 CPDF_Object* obj = GetDirect(); |
| 72 return (obj && !obj->IsReference()) ? obj : nullptr; |
| 73 } |
| 74 |
70 void CPDF_Reference::SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum) { | 75 void CPDF_Reference::SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum) { |
71 m_pObjList = pDoc; | 76 m_pObjList = pDoc; |
72 m_RefObjNum = objnum; | 77 m_RefObjNum = objnum; |
73 } | 78 } |
74 | 79 |
75 CPDF_Object* CPDF_Reference::GetDirect() const { | 80 CPDF_Object* CPDF_Reference::GetDirect() const { |
76 return m_pObjList ? m_pObjList->GetOrParseIndirectObject(m_RefObjNum) | 81 return m_pObjList ? m_pObjList->GetOrParseIndirectObject(m_RefObjNum) |
77 : nullptr; | 82 : nullptr; |
78 } | 83 } |
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