SCM_LENGTH, SCM_HUGE_LENGTH, SCM_SUBSTRP, SCM_SUBSTR_STR, SCM_SUBSTR_OFFSET,
SCM_COERCE_SUBSTR, SCM_ROSTRINGP, SCM_RWSTRINGP, SCM_VALIDATE_RWSTRING,
SCM_ROCHARS, SCM_ROUCHARS, SCM_SETLENGTH, SCM_SETCHARS, SCM_LENGTH_MAX,
SCM_LENGTH, SCM_HUGE_LENGTH, SCM_SUBSTRP, SCM_SUBSTR_STR, SCM_SUBSTR_OFFSET,
SCM_COERCE_SUBSTR, SCM_ROSTRINGP, SCM_RWSTRINGP, SCM_VALIDATE_RWSTRING,
SCM_ROCHARS, SCM_ROUCHARS, SCM_SETLENGTH, SCM_SETCHARS, SCM_LENGTH_MAX,