Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/CPP/7zip/Archive/Common/MultiStream.h

-// MultiStream.h
-
-#ifndef __MULTISTREAM_H
-#define __MULTISTREAM_H
-
-#include "../../../Common/MyCom.h"
-#include "../../../Common/MyVector.h"
-#include "../../Archive/IArchive.h"
-
-class CMultiStream:
-  public IInStream,
-  public CMyUnknownImp
-{
-  int _streamIndex;
-  UInt64 _pos;
-  UInt64 _seekPos;
-  UInt64 _totalLength;
-public:
-  struct CSubStreamInfo
-  {
-    CMyComPtr<IInStream> Stream;
-    UInt64 Pos;
-    UInt64 Size;
-  };
-  CObjectVector<CSubStreamInfo> Streams;
-  void Init()
-  {
-    _streamIndex = 0;
-    _pos = 0;
-    _seekPos = 0;
-    _totalLength = 0;
-    for (int i = 0; i < Streams.Size(); i++)
-      _totalLength += Streams[i].Size;
-  }
-
-  MY_UNKNOWN_IMP1(IInStream)
-
-  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
-  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
-};
-
-/*
-class COutMultiStream:
-  public IOutStream,
-  public CMyUnknownImp
-{
-  int _streamIndex; // required stream
-  UInt64 _offsetPos; // offset from start of _streamIndex index
-  UInt64 _absPos;
-  UInt64 _length;
-
-  struct CSubStreamInfo
-  {
-    CMyComPtr<ISequentialOutStream> Stream;
-    UInt64 Size;
-    UInt64 Pos;
- };
-  CObjectVector<CSubStreamInfo> Streams;
-public:
-  CMyComPtr<IArchiveUpdateCallback2> VolumeCallback;
-  void Init()
-  {
-    _streamIndex = 0;
-    _offsetPos = 0;
-    _absPos = 0;
-    _length = 0;
-  }
-
-  MY_UNKNOWN_IMP1(IOutStream)
-
-  STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
-  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
-};
-*/
-
-#endif