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

third_party/lzma/v4_65/files/C/7zBuf.h

-/* 7zBuf.h -- Byte Buffer
-2008-10-04 : Igor Pavlov : Public domain */
-
-#ifndef __7Z_BUF_H
-#define __7Z_BUF_H
-
-#include "Types.h"
-
-typedef struct
-{
-  Byte *data;
-  size_t size;
-} CBuf;
-
-void Buf_Init(CBuf *p);
-int Buf_Create(CBuf *p, size_t size, ISzAlloc *alloc);
-void Buf_Free(CBuf *p, ISzAlloc *alloc);
-
-typedef struct
-{
-  Byte *data;
-  size_t size;
-  size_t pos;
-} CDynBuf;
-
-void DynBuf_Construct(CDynBuf *p);
-void DynBuf_SeekToBeg(CDynBuf *p);
-int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAlloc *alloc);
-void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc);
-
-#endif