*/
sn_stage_t *sn_stage_unserialize (char **buffer, size_t *buffer_size);
-uint32_t sn_stage_get_hashval (const sn_stage_t *s);
+int sn_stage_compare (const sn_stage_t *s0, const sn_stage_t *s1);
+
+uint64_t sn_stage_get_hashval (const sn_stage_t *s);
#endif /* SN_STAGE_H */