/// <summary>
/// Returns a new automaton that accepts strings representing decimal non-negative integers in
/// the given interval.
/// </summary>
/// <param name="min">The minimum value of interval.</param>
/// <param name="max">The maximum value of inverval (both end points are included in the
/// interval).</param>
/// <param name="digits">If f >0, use fixed number of digits (strings must be prefixed by 0's
/// to obtain the right length) otherwise, the number of digits is not fixed.</param>
/// <returns>A new automaton that accepts strings representing decimal non-negative integers
/// in the given interval.</returns>
public static Automaton MakeInterval(int min, int max, int digits)
{
if (min > max)
{
throw new ArgumentException("min must not be greater than max.");
}
var a = new Automaton();
string x = Convert.ToString(min, CultureInfo.CurrentCulture);
string y = Convert.ToString(max, CultureInfo.CurrentCulture);
if ((digits > 0 && y.Length > digits))
{
throw new ArgumentException($"Fixed length output specified ({digits}), but will not fit max ({y.Length}).");
}
int d = digits > 0 ? digits : y.Length;
var bx = new StringBuilder();
for (int i = x.Length; i < d; i++)
{
bx.Append('0');
}
bx.Append(x);
x = bx.ToString();
var by = new StringBuilder();
for (int i = y.Length; i < d; i++)
{
by.Append('0');
}
by.Append(y);
y = by.ToString();
ICollection <State> initials = new List <State>();
a.Initial = BasicAutomata.Between(x, y, 0, initials, digits <= 0);
if (digits <= 0)
{
List <StatePair> pairs = (from p in initials
where a.Initial != p
select new StatePair(a.Initial, p)).ToList();
a.AddEpsilons(pairs);
a.Initial.AddTransition(new Transition('0', a.Initial));
a.IsDeterministic = false;
}
else
{
a.IsDeterministic = true;
}
a.CheckMinimizeAlways();
return(a);
}
/// <summary>
/// Returns a new automaton that accepts strings representing decimal non-negative integers in
/// the given interval.
/// </summary>
/// <param name="min">The minimum value of interval.</param>
/// <param name="max">The maximum value of inverval (both end points are included in the
/// interval).</param>
/// <param name="digits">If f >0, use fixed number of digits (strings must be prefixed by 0's
/// to obtain the right length) otherwise, the number of digits is not fixed.</param>
/// <returns>A new automaton that accepts strings representing decimal non-negative integers
/// in the given interval.</returns>
public static Automaton MakeInterval(int min, int max, int digits)
{
var a = new Automaton();
string x = Convert.ToString(min);
string y = Convert.ToString(max);
if (min > max || (digits > 0 && y.Length > digits))
{
throw new ArgumentException();
}
int d = digits > 0 ? digits : y.Length;
var bx = new StringBuilder();
for (int i = x.Length; i < d; i++)
{
bx.Append('0');
}
bx.Append(x);
x = bx.ToString();
var by = new StringBuilder();
for (int i = y.Length; i < d; i++)
{
by.Append('0');
}
by.Append(y);
y = by.ToString();
ICollection <State> initials = new List <State>();
a.Initial = BasicAutomata.Between(x, y, 0, initials, digits <= 0);
if (digits <= 0)
{
List <StatePair> pairs = (from p in initials
where a.Initial != p
select new StatePair(a.Initial, p)).ToList();
a.AddEpsilons(pairs);
a.Initial.AddTransition(new Transition('0', a.Initial));
a.IsDeterministic = false;
}
else
{
a.IsDeterministic = true;
}
a.CheckMinimizeAlways();
return(a);
}