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

third_party/lzma/v4_65/files/CPP/Windows/FileName.cpp

-// Windows/FileName.cpp
-
-#include "StdAfx.h"
-
-#include "Windows/FileName.h"
-#include "Common/Wildcard.h"
-
-namespace NWindows {
-namespace NFile {
-namespace NName {
-
-void NormalizeDirPathPrefix(CSysString &dirPath)
-{
-  if (dirPath.IsEmpty())
-    return;
-  if (dirPath.ReverseFind(kDirDelimiter) != dirPath.Length() - 1)
-    dirPath += kDirDelimiter;
-}
-
-#ifndef _UNICODE
-void NormalizeDirPathPrefix(UString &dirPath)
-{
-  if (dirPath.IsEmpty())
-    return;
-  if (dirPath.ReverseFind(wchar_t(kDirDelimiter)) != dirPath.Length() - 1)
-    dirPath += wchar_t(kDirDelimiter);
-}
-#endif
-
-const wchar_t kExtensionDelimiter = L'.';
-
-void SplitNameToPureNameAndExtension(const UString &fullName,
-    UString &pureName, UString &extensionDelimiter, UString &extension)
-{
-  int index = fullName.ReverseFind(kExtensionDelimiter);
-  if (index < 0)
-  {
-    pureName = fullName;
-    extensionDelimiter.Empty();
-    extension.Empty();
-  }
-  else
-  {
-    pureName = fullName.Left(index);
-    extensionDelimiter = kExtensionDelimiter;
-    extension = fullName.Mid(index + 1);
-  }
-}
-
-}}}