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

third_party/lzma/v4_65/files/CPP/7zip/UI/Common/ArchiveName.cpp

-// ArchiveName.cpp
-
-#include "StdAfx.h"
-
-#include "Windows/FileFind.h"
-#include "Windows/FileDir.h"
-
-using namespace NWindows;
-
-UString CreateArchiveName(const UString &srcName, bool fromPrev, bool keepName)
-{
-  UString resultName = L"Archive";
-  if (fromPrev)
-  {
-    UString dirPrefix;
-    if (NFile::NDirectory::GetOnlyDirPrefix(srcName, dirPrefix))
-    {
-      if (dirPrefix.Length() > 0)
-        if (dirPrefix[dirPrefix.Length() - 1] == WCHAR_PATH_SEPARATOR)
-        {
-          dirPrefix.Delete(dirPrefix.Length() - 1);
-          NFile::NFind::CFileInfoW fileInfo;
-          if (NFile::NFind::FindFile(dirPrefix, fileInfo))
-            resultName = fileInfo.Name;
-        }
-    }
-  }
-  else
-  {
-    NFile::NFind::CFileInfoW fileInfo;
-    if (!NFile::NFind::FindFile(srcName, fileInfo))
-      return resultName;
-    resultName = fileInfo.Name;
-    if (!fileInfo.IsDir() && !keepName)
-    {
-      int dotPos = resultName.ReverseFind('.');
-      if (dotPos > 0)
-      {
-        UString archiveName2 = resultName.Left(dotPos);
-        if (archiveName2.ReverseFind('.') < 0)
-          resultName = archiveName2;
-      }
-    }
-  }
-  return resultName;
-}