GETNEXT
count = count*10 + ((uch)GETNEXT() - '0');
#define MUSTEAT(c, e) (REQUIRE(MORE() && GETNEXT() == (c), e))
c = GETNEXT();
c = (uch)GETNEXT();
cc = (uch)GETNEXT();
GETNEXT(so_gate, so_dest);
GETNEXT(so_pref, so_gate);
GETNEXT(so_pref, so_dest);
GETNEXT(ifa, ifa);
GETNEXT(ifa, ifa);
GETNEXT(so_gate, so_dst);
GETNEXT(so_pref, so_gate);
GETNEXT(so_pref, so_dst);
GETNEXT(so_gate, so_dst);
GETNEXT(so_pref, so_gate);