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

third_party/lzma/v4_65/files/CPP/7zip/Common/LimitedStreams.h

-// LimitedStreams.h
-
-#ifndef __LIMITEDSTREAMS_H
-#define __LIMITEDSTREAMS_H
-
-#include "../../Common/MyCom.h"
-#include "../IStream.h"
-
-class CLimitedSequentialInStream:
-  public ISequentialInStream,
-  public CMyUnknownImp
-{
-  CMyComPtr<ISequentialInStream> _stream;
-  UInt64 _size;
-  UInt64 _pos;
-  bool _wasFinished;
-public:
-  void SetStream(ISequentialInStream *stream) { _stream = stream; }
-  void Init(UInt64 streamSize)
-  {
-    _size = streamSize;
-    _pos = 0;
-    _wasFinished = false;
-  }
- 
-  MY_UNKNOWN_IMP
-
-  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
-  UInt64 GetSize() const { return _pos; }
-  bool WasFinished() const { return _wasFinished; }
-};
-
-class CLimitedSequentialOutStream:
-  public ISequentialOutStream,
-  public CMyUnknownImp
-{
-  CMyComPtr<ISequentialOutStream> _stream;
-  UInt64 _size;
-  bool _overflow;
-public:
-  MY_UNKNOWN_IMP
-  STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
-  void SetStream(ISequentialOutStream *stream) { _stream = stream; }
-  void ReleaseStream() { _stream.Release(); }
-  void Init(UInt64 size)
-  {
-    _size = size;
-    _overflow = false;
-  }
-  bool IsFinishedOK() const { return (_size == 0 && !_overflow); }
-  UInt64 GetRem() const { return _size; }
-};
-
-#endif