-int write_cache_tree(const unsigned char *, struct cache_tree *);
-struct cache_tree *read_cache_tree(unsigned char *);
-int cache_tree_update(struct cache_tree *, struct cache_entry **, int, int);
+void *cache_tree_write(struct cache_tree *root, unsigned long *size_p);
+struct cache_tree *cache_tree_read(const char *buffer, unsigned long size);