item_head
#define IH_SIZE (sizeof (struct item_head))
struct item_head *current_ih;
#define ITEMHEAD ((struct item_head *) ((int) LEAF + BLKH_SIZE))
struct item_head *ih = INFO->current_ih + 1;
ih = (struct item_head *) &BLOCKHEAD (LEAF)->blk_right_delim_key;
struct item_head *ih;