Function is_valid_number

tools/ipfw/dummynet.c:779–789

* returns 1 if s is a non-negative number, with at least one '.' */

 * returns 1 if s is a non-negative number, with at least one '.'
 */
static int
is_valid_number(const char *s)
{
	int i, dots_found = 0;
	int len = strlen(s);

	for (i = 0; i<len; ++i)
		if (!isdigit(s[i]) && (s[i] !='.' || ++dots_found > 1))
			return 0;
	return 1;
}

/*
 * Take as input a string describing a bandwidth value