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// Copyright 2017 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_FXCRT_CFX_SEEKABLESTREAMPROXY_H_
#define CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_
#include <algorithm>
#include "core/fxcrt/cfx_retain_ptr.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxcrt/fx_system.h"
class CFX_SeekableStreamProxy : public CFX_Retainable {
public:
enum class Pos {
Begin = 0,
Current,
};
template <typename T, typename... Args>
friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
FX_FILESIZE GetLength() const { return m_pStream->GetSize(); }
FX_FILESIZE GetPosition() { return m_iPosition; }
FX_STRSIZE GetBOMLength() const { return std::max(0, m_wBOMLength); }
bool IsEOF() const { return m_iPosition >= GetLength(); }
void Seek(CFX_SeekableStreamProxy::Pos eSeek, FX_FILESIZE iOffset);
FX_STRSIZE ReadString(wchar_t* pStr, FX_STRSIZE iMaxLength, bool* bEOS);
void WriteString(const CFX_WideStringC& str);
uint16_t GetCodePage() const { return m_wCodePage; }
void SetCodePage(uint16_t wCodePage);
private:
CFX_SeekableStreamProxy(const CFX_RetainPtr<IFX_SeekableStream>& stream,
bool isWriteSteam);
CFX_SeekableStreamProxy(uint8_t* data, FX_STRSIZE size);
~CFX_SeekableStreamProxy() override;
FX_STRSIZE ReadData(uint8_t* pBuffer, FX_STRSIZE iBufferSize);
bool m_IsWriteStream;
uint16_t m_wCodePage;
FX_STRSIZE m_wBOMLength;
FX_FILESIZE m_iPosition;
CFX_RetainPtr<IFX_SeekableStream> m_pStream;
};
#endif // CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_
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