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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. http://www.foxitsoftware.com
#ifndef CORE_FPDFAPI_PARSER_CPDF_STREAM_H_
#define CORE_FPDFAPI_PARSER_CPDF_STREAM_H_
#include <memory>
#include <set>
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fxcrt/fx_basic.h"
class CPDF_Stream : public CPDF_Object {
public:
CPDF_Stream();
// Takes ownership of |pData| and |pDict|.
CPDF_Stream(uint8_t* pData, uint32_t size, CPDF_Dictionary* pDict);
// CPDF_Object.
Type GetType() const override;
CPDF_Object* Clone() const override;
CPDF_Dictionary* GetDict() const override;
CFX_WideString GetUnicodeText() const override;
bool IsStream() const override;
CPDF_Stream* AsStream() override;
const CPDF_Stream* AsStream() const override;
uint32_t GetRawSize() const { return m_dwSize; }
uint8_t* GetRawData() const { return m_pDataBuf.get(); }
// Does not takes onwership of |pData|, copies into internally-owned buffer.
void SetData(const uint8_t* pData, uint32_t size);
void InitStream(const uint8_t* pData, uint32_t size, CPDF_Dictionary* pDict);
void InitStreamFromFile(IFX_FileRead* pFile, CPDF_Dictionary* pDict);
FX_BOOL ReadRawData(FX_FILESIZE start_pos,
uint8_t* pBuf,
uint32_t buf_size) const;
bool IsMemoryBased() const { return m_bMemoryBased; }
protected:
~CPDF_Stream() override;
CPDF_Object* CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const override;
std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> m_pDict;
bool m_bMemoryBased = true;
uint32_t m_dwSize = 0;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pDataBuf;
IFX_FileRead* m_pFile = nullptr;
};
using UniqueStream = std::unique_ptr<CPDF_Stream, ReleaseDeleter<CPDF_Object>>;
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 UniqueStream ToStream(UniqueObject obj) {
CPDF_Stream* pStream = ToStream(obj.get());
if (!pStream)
return nullptr;
obj.release();
return UniqueStream(pStream);
}
#endif // CORE_FPDFAPI_PARSER_CPDF_STREAM_H_
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