int (*bend_sort) (void *handle, bend_sort_rr *rr);
int (*bend_search) (void *handle, bend_search_rr *rr);
int (*bend_present) (void *handle, bend_present_rr *rr);
int (*bend_sort) (void *handle, bend_sort_rr *rr);
int (*bend_search) (void *handle, bend_search_rr *rr);
int (*bend_present) (void *handle, bend_present_rr *rr);