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

third_party/lzma/v4_65/files/CPP/7zip/Compress/BranchCoder.h

-// BranchCoder.h
-
-#ifndef __COMPRESS_BRANCH_CODER_H
-#define __COMPRESS_BRANCH_CODER_H
-
-#include "../../Common/MyCom.h"
-
-#include "../ICoder.h"
-
-class CBranchConverter:
-  public ICompressFilter,
-  public CMyUnknownImp
-{
-protected:
-  UInt32 _bufferPos;
-  virtual void SubInit() {}
-  virtual UInt32 SubFilter(Byte *data, UInt32 size) = 0;
-public:
-  MY_UNKNOWN_IMP;
-  STDMETHOD(Init)();
-  STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
-};
-
-#define MyClassEncoderA(Name) class C ## Name: public CBranchConverter \
-  { public: UInt32 SubFilter(Byte *data, UInt32 size); };
-
-#define MyClassDecoderA(Name) class C ## Name: public CBranchConverter \
-  { public: UInt32 SubFilter(Byte *data, UInt32 size); };
-
-#define MyClassEncoderB(Name, ADD_ITEMS, ADD_INIT) class C ## Name: public CBranchConverter, public ADD_ITEMS \
-  { public: UInt32 SubFilter(Byte *data, UInt32 size); ADD_INIT};
-
-#define MyClassDecoderB(Name, ADD_ITEMS, ADD_INIT) class C ## Name: public CBranchConverter, public ADD_ITEMS \
-  { public: UInt32 SubFilter(Byte *data, UInt32 size); ADD_INIT};
-
-#define MyClassA(Name, id, subId)  \
-MyClassEncoderA(Name ## _Encoder) \
-MyClassDecoderA(Name ## _Decoder)
-
-#define MyClassB(Name, id, subId, ADD_ITEMS, ADD_INIT)  \
-MyClassEncoderB(Name ## _Encoder, ADD_ITEMS, ADD_INIT) \
-MyClassDecoderB(Name ## _Decoder, ADD_ITEMS, ADD_INIT)
-
-#endif