+/**
+ * Compares two comparators and returns less than zero, zero, or greater than
+ * zero if the first comparator is smaller than, equal to or larger than the
+ * second comparator, respectively.
+ *
+ * \param c0 Pointer to the first comparator.
+ * \param c1 Pointer to the second comparator.
+ */
+int sn_comparator_compare (const sn_comparator_t *c0,
+ const sn_comparator_t *c1);
+
+uint32_t sn_comparator_get_hashval (const sn_comparator_t *c);