| // Copyright 2018 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CORE_FPDFAPI_PARSER_CPDF_OBJECT_STREAM_H_ |
| #define CORE_FPDFAPI_PARSER_CPDF_OBJECT_STREAM_H_ |
| |
| #include <map> |
| #include <memory> |
| |
| #include "core/fpdfapi/parser/cpdf_object.h" |
| #include "core/fxcrt/retain_ptr.h" |
| |
| class CPDF_IndirectObjectHolder; |
| class CPDF_Stream; |
| class IFX_SeekableReadStream; |
| |
| // Implementation of logic of PDF "Object Streams". |
| // See "PDF 32000-1:2008" Spec. section 7.5.7. |
| class CPDF_ObjectStream { |
| public: |
| static bool IsObjectsStreamObject(const CPDF_Object* object); |
| |
| static std::unique_ptr<CPDF_ObjectStream> Create(const CPDF_Stream* stream); |
| |
| ~CPDF_ObjectStream(); |
| |
| uint32_t obj_num() const { return obj_num_; } |
| uint32_t extends_obj_num() const { return extends_obj_num_; } |
| |
| bool HasObject(uint32_t obj_number) const; |
| RetainPtr<CPDF_Object> ParseObject(CPDF_IndirectObjectHolder* pObjList, |
| uint32_t obj_number) const; |
| const std::map<uint32_t, uint32_t>& objects_offsets() const { |
| return objects_offsets_; |
| } |
| |
| protected: |
| explicit CPDF_ObjectStream(const CPDF_Stream* stream); |
| |
| void Init(const CPDF_Stream* stream); |
| RetainPtr<CPDF_Object> ParseObjectAtOffset( |
| CPDF_IndirectObjectHolder* pObjList, |
| uint32_t object_offset) const; |
| |
| uint32_t obj_num_ = CPDF_Object::kInvalidObjNum; |
| uint32_t extends_obj_num_ = CPDF_Object::kInvalidObjNum; |
| |
| RetainPtr<IFX_SeekableReadStream> data_stream_; |
| int first_object_offset_ = 0; |
| std::map<uint32_t, uint32_t> objects_offsets_; |
| }; |
| |
| #endif // CORE_FPDFAPI_PARSER_CPDF_OBJECT_STREAM_H_ |