ADVANCE
#define ADVANCE(n) \
#define ADVANCE do { \
#define ADVANCE(n) {w += n; mlen -= n;}
#define ADVANCE (n = tf->tf_npc, tf->tf_pc = n, tf->tf_npc = n + 4)
#undef ADVANCE
#define ADVANCE (n = tf->tf_npc, tf->tf_pc = n, tf->tf_npc = n + 4)
#undef ADVANCE
#define ADVANCE \
#define ADVANCE \
#define ADVANCE() { z.next_in++; z.avail_in--; }
#define ADVANCE(x, n) ((char *)(x) + ROUNDUP((n)->sa_len))