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// Copyright 2016 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.
// Original code copyright 2014 Foxit Software Inc.
#include <memory>
#include <set>
#include <sstream>
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fxcrt/fx_stream.h"
class CPDF_Stream final : public CPDF_Object {
CPDF_Stream(std::unique_ptr<uint8_t, FxFreeDeleter> pData,
uint32_t size,
std::unique_ptr<CPDF_Dictionary> pDict);
~CPDF_Stream() override;
// CPDF_Object:
Type GetType() const override;
std::unique_ptr<CPDF_Object> Clone() const override;
CPDF_Dictionary* GetDict() override;
const CPDF_Dictionary* GetDict() const override;
WideString GetUnicodeText() const override;
bool IsStream() const override;
CPDF_Stream* AsStream() override;
const CPDF_Stream* AsStream() const override;
bool WriteTo(IFX_ArchiveStream* archive,
const CPDF_Encryptor* encryptor) const override;
uint32_t GetRawSize() const { return m_dwSize; }
// Will be null in case when stream is not memory based.
// Use CPDF_StreamAcc to data access in all cases.
uint8_t* GetInMemoryRawData() const { return m_pDataBuf.get(); }
// Copies span into internally-owned buffer.
void SetData(pdfium::span<const uint8_t> pData);
void TakeData(std::unique_ptr<uint8_t, FxFreeDeleter> pData, uint32_t size);
void SetDataFromStringstream(std::ostringstream* stream);
// Set data and remove "Filter" and "DecodeParms" fields from stream
// dictionary.
void SetDataAndRemoveFilter(pdfium::span<const uint8_t> pData);
void SetDataFromStringstreamAndRemoveFilter(std::ostringstream* stream);
void InitStream(pdfium::span<const uint8_t> pData,
std::unique_ptr<CPDF_Dictionary> pDict);
void InitStreamFromFile(const RetainPtr<IFX_SeekableReadStream>& pFile,
std::unique_ptr<CPDF_Dictionary> pDict);
bool ReadRawData(FX_FILESIZE start_pos,
uint8_t* pBuf,
uint32_t buf_size) const;
bool IsMemoryBased() const { return m_bMemoryBased; }
bool HasFilter() const;
std::unique_ptr<CPDF_Object> CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const override;
bool m_bMemoryBased = true;
uint32_t m_dwSize = 0;
std::unique_ptr<CPDF_Dictionary> m_pDict;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pDataBuf;
RetainPtr<IFX_SeekableReadStream> m_pFile;
inline CPDF_Stream* ToStream(CPDF_Object* obj) {
return obj ? obj->AsStream() : nullptr;
inline const CPDF_Stream* ToStream(const CPDF_Object* obj) {
return obj ? obj->AsStream() : nullptr;
inline std::unique_ptr<CPDF_Stream> ToStream(std::unique_ptr<CPDF_Object> obj) {
CPDF_Stream* pStream = ToStream(obj.get());
if (!pStream)
return nullptr;
return std::unique_ptr<CPDF_Stream>(pStream);