+void roff_word_alloc(struct roff_man *, int, int, const char *);
+void roff_word_append(struct roff_man *, const char *);
+void roff_elem_alloc(struct roff_man *, int, int, int);
+struct roff_node *roff_block_alloc(struct roff_man *, int, int, int);