1/*
 2 * Count the digits of @val including a possible sign.
 3 *
 4 * (Typed on and submitted from hpa's mobile phone.)
 5 */
 6int num_digits(int val)
 7{
 8	int m = 10;
 9	int d = 1;
10
11	if (val < 0) {
12		d++;
13		val = -val;
14	}
15
16	while (val >= m) {
17		m *= 10;
18		d++;
19	}
20	return d;
21}