public static int Minimize5(this DfaState start, bool showProgress)
{
var startTime = DateTime.Now;
if (showProgress)
Console.WriteLine("Minimize DFA v.5");
var states = new List<DfaState>(3000000);
start.ForEachNR((state) => { states.Add(state); });
var sets = new IntSet(states);
if (showProgress)
Console.WriteLine("Create list: {0}", DateTime.Now - startTime);
if (showProgress)
Console.Write("Proccessing marks...\r");
var startTime2 = DateTime.Now;
foreach (var state in sets.GetSet(0))
{
if (state.Value.AllMarks.Count > 0)
{
for (int i = 1; i < sets.Count; i++)
{
var state2 = sets.GetFirst(i);
if (state.Value.IsSame(state2))
{
sets.MoveToSet(state, state2.SetId);
break;
}
}
if (state.Value.SetId == 0)
sets.MoveToNewSet(state);
}
}
sets.RemoveEmpty();
if (showProgress)
{
Console.WriteLine("Marks: {0}\t\t", DateTime.Now - startTime2);
Console.WriteLine("Splitted by marks to {0} sets", sets.Count);
}
for (int oldCount = -1; oldCount < sets.Count; )
{
oldCount = sets.Count;
for (int i = 0; i < sets.Count; i++)
{
DfaState first = sets.GetFirst(i);
bool splitted = false;
foreach (var state in sets.GetSet(i))
{
if (IsTransitedToSameSets4(first, state.Value) == false)
{
state.Value.NewSetId = sets.NewSetId;
splitted = true;
}
}
if (splitted)
{
foreach (var state in sets.GetSet(i))
sets.MoveToSet(state, state.Value.NewSetId);
Console.Write("{0}\r", sets.Count);
}
}
}
if (showProgress)
Console.Write("Create MiniDFA\r");
CreateMiniDfa4(start, states, sets);
if (showProgress)
Console.WriteLine("Done ({0}, {1})\t\t\t\t", sets.Count, DateTime.Now - startTime);
return sets.Count;
}
private static void CreateMiniDfa4(DfaState start, List<DfaState> states, IntSet sets)
{
var miniStates = new DfaState[sets.Count];
for (int i = 0; i < sets.Count; i++)
{
if (i == start.SetId)
miniStates[i] = start;
else
miniStates[i] = sets.GetFirst(i);
}
foreach (var state in miniStates)
{
for (int ch = 0; ch <= byte.MaxValue; ch++)
{
int transitedSetId = state.GetTransitedSetId(ch);
if (transitedSetId >= 0)
state.SetTransition((byte)ch, miniStates[transitedSetId]);
else
if (state.Transition[ch] != null)
throw new InvalidProgramException();
}
}
}