void save(){
  if (rSave == null) {
    rSave=new byte[blockSize];
  }
  System.arraycopy(r,0,rSave,0,blockSize);
}

void save ( ) { if ( rSave == null ) { rSave = new byte [ blockSize ] ; } System . arraycopy ( r , 0 , rSave , 0 , blockSize ) ; }
save the current content of this cipher .
