get_shift
int count = get_shift(line->shift_count) * -SHIFT_SIZE;
int cnt = get_shift(line->shift_count) * -SHIFT_SIZE;
int nx = get_shift(line->shift_count) * -SHIFT_SIZE;
int tx = get_shift(line->shift_count) * -SHIFT_SIZE;
if (x == 0 && get_shift(cur_line->shift_count) == 0) {/* Begin of line */
if (get_shift(start_line->shift_count)) {
if (shift >= get_shift(start_line->shift_count))