-void ls_init (struct len_string *, const char *, size_t);
-void ls_shallow_copy (struct len_string *, const struct len_string *);
-void ls_destroy (struct len_string *);
+void ls_init (struct fixed_string *, const char *, size_t);
+void ls_shallow_copy (struct fixed_string *, const struct fixed_string *);
+void ls_destroy (struct fixed_string *);