The source code in the following files are snapshots from the Slicer3 development repository.

FreeSurferConfigure.h.in
vtkFreeSurferWin32Header.h
vtkFSIO.h
vtkFSIO.cxx
vtkFSSurfaceReader.h
vtkFSSurfaceReader.cxx
vtkFSSurfaceScalarFileReader.h
vtkFSSurfaceScalarFileReader.cxx