IslandPair *ip= ipair_get_create(cols[1], cols[3]);
TradesBlock *block= ip->trades;
if (!block || ip->trades->ntrades >= TRADES_PER_BLOCK) {
IslandPair *ip= ipair_get_create(cols[1], cols[3]);
TradesBlock *block= ip->trades;
if (!block || ip->trades->ntrades >= TRADES_PER_BLOCK) {