process header io except header process cb posit rewind charact buffer matcher matcher xml declar pattern matcher cb remov match pattern header remaind matcher replac index header remaind length header remaind index remov charact end index index header remaind index header remaind header remaind substr index reencod remain charact byte buffer bb decod charset encod header remaind write output stream byte bb limit bb byte write byte byte length write left byte input buffer partial decod charact bb remain write bb arrai bb posit bb remain bb posit bb limit 