c_delbefore
c_delbefore(el, -size);
c_delbefore(el, n); /* delete before dot */
protected void c_delbefore(EditLine *, int);
c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
c_delbefore(el, el->el_state.argument);
c_delbefore(el, (int)(cp - el->el_chared.c_kill.mark));
c_delbefore(el, el->el_state.argument);
c_delbefore(el, (int)(el->el_line.cursor - el->el_line.buffer));