char *signature; /* not actually implemented */
};
-extern struct tag *lookup_tag(unsigned char *sha1);
+extern struct tag *lookup_tag(const unsigned char *sha1);
extern int parse_tag_buffer(struct tag *item, void *data, unsigned long size);
extern int parse_tag(struct tag *item);
+extern struct object *deref_tag(struct object *);
#endif /* TAG_H */