SN_LESS
if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
} else if (SN_LESS(wend, seq_num)) {
if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
if (SN_LESS(pattrib->seqnum, tx_seq)) {