+
+
+/* These funcs are useful for hash tables */
+
+/* Return -1 if the id of a is less than b; +1 if greater than and
+ 0 if equal */
+int compare_group(const struct group_statistics *a,
+ const struct group_statistics *b,
+ int width);
+
+unsigned hash_group(const struct group_statistics *g, int width);
+
+void free_group(struct group_statistics *v, void *aux);
+
+
+