#define free_node(p, s) free_node_((halfword) (p), (halfword) (s))
void sort_avail(void);
pointer new_null_box(void);
+pointer new_dir_node_(pointer b, eight_bits dir);
+#define new_dir_node(b, dir) new_dir_node_((pointer) (b), (eight_bits) (dir));
pointer new_rule(void);
pointer new_ligature_(quarterword, quarterword, pointer);
#define new_ligature(f, c, q) new_ligature_((quarterword) (f), (quarterword) (c), (pointer) (q))