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// 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.
#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 {
static bool IsObjectsStreamObject(const CPDF_Object* object);
static std::unique_ptr<CPDF_ObjectStream> Create(const CPDF_Stream* stream);
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_;
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_;