HOFFDUP_SIZE
if (ISBIG(hcp, new_datalen) && (old_len > HOFFDUP_SIZE ||
HOFFDUP_SIZE - old_len <= P_FREESPACE(hcp->pagep)))
HOFFDUP_SIZE : HKEYDATA_SIZE(new_datalen);
new_dbt.size = HOFFDUP_SIZE;
LEN_HITEM(pagep, hcp->hdr->pagesize, ndx) - HOFFDUP_SIZE;
memcpy(P_ENTRY(pagep, ndx), &od, HOFFDUP_SIZE);
#define HOFFDUP_PSIZE (HOFFDUP_SIZE + sizeof(db_indx_t))