strqueue_pushjoin
strqueue_pushjoin(osq, "-", sq1->str[i++], 0);
strqueue_pushjoin(osq, "+", sq2->str[j++], 0);
strqueue_pushjoin(osq, "-", sq1->str[i++], 0);
strqueue_pushjoin(osq, "+", sq2->str[j++], 0);