-/* Return -1 if the id of a is less than b; +1 if greater than and
- 0 if equal */
-int
-compare_group (const void *a_,
- const void *b_,
- const void *var)
-{
- const struct group_statistics *a = a_;
- const struct group_statistics *b = b_;
- return value_compare_3way (&a->id, &b->id, var_get_width (var));
-}