7zspecstream.h

来自「由7-zip提供的压缩、解压缩程序」· C头文件 代码 · 共 36 行

// 7zSpecStream.h

#ifndef __7Z_SPEC_STREAM_H
#define __7Z_SPEC_STREAM_H

#include "../../IStream.h"
#include "../../ICoder.h"
#include "../../../Common/MyCom.h"

class CSequentialInStreamSizeCount2: 
  public ISequentialInStream,
  public ICompressGetSubStreamSize,
  public CMyUnknownImp
{
  CMyComPtr<ISequentialInStream> _stream;
  CMyComPtr<ICompressGetSubStreamSize> _getSubStreamSize;
  UInt64 _size;
public:
  void Init(ISequentialInStream *stream)
  {
    _stream = stream;
    _getSubStreamSize = 0;
    _stream.QueryInterface(IID_ICompressGetSubStreamSize, &_getSubStreamSize);
    _size = 0;
  }
  UInt64 GetSize() const { return _size; }

  MY_UNKNOWN_IMP1(ICompressGetSubStreamSize)

  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);

  STDMETHOD(GetSubStreamSize)(UInt64 subStream, UInt64 *value);
};

#endif