if (x1 + table->col_ofs < 0 || x1 + table->col_ofs >= table->nc
|| y1 + table->row_ofs < 0 || y1 + table->row_ofs >= table->nr
|| x2 < x1 || x2 + table->col_ofs >= table->nc
if (x1 + table->col_ofs < 0 || x1 + table->col_ofs >= table->nc
|| y1 + table->row_ofs < 0 || y1 + table->row_ofs >= table->nr
|| x2 < x1 || x2 + table->col_ofs >= table->nc