__ham_func4
hcp->hdr->version < 5 ? __ham_func4 : __ham_func5;
dbp->h_hash = hcp->hdr->version < 5 ? __ham_func4 : __ham_func5;
u_int32_t __ham_func4 __P((const void *, u_int32_t));
cksum: if (hdr.cksum != __ham_func4(dbt->data, dbt->size)) {
hdr.cksum = __ham_func4(dbt->data, dbt->size);