public static void Execute(RegExp regExp)
{
// Convert regex to ndfa
Console.WriteLine();
Console.WriteLine("----- Converting regex to ndfa -----");
Automaat <string> ndfa = ThompsonConstruction.ConvertRegExp(regExp);
foreach (Transition <string> transition in ndfa.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(ndfa, "ndfa");
Console.WriteLine("Image saved as ndfa.jpg");
// Convert ndfa to dfa
Console.WriteLine();
Console.WriteLine("----- Converting ndfa to dfa -----");
Automaat <string> dfa = NdfaToDfaConverter.Convert(ndfa);
foreach (Transition <string> transition in dfa.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(dfa, "dfa");
Console.WriteLine("Image saved as dfa.jpg");
// Optimizing dfa Brzozowski
Console.WriteLine();
Console.WriteLine("----- Optimizing dfa: Brzozowski's algorithm -----");
Automaat <string> brzozowskiDfa = NdfaToDfaConverter.OptimizeDfa(dfa);
foreach (Transition <string> transition in brzozowskiDfa.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(brzozowskiDfa, "BrzozowskiDfa");
Console.WriteLine("Image saved as BrzozowskiDfa.jpg");
// Optimize dfa Hopcroft
Console.WriteLine();
Console.WriteLine("----- Optimizing dfa: Hopcroft's algorithm -----");
Automaat <string> hopcroftDfa = HopcroftAlgorithm.MinimizeDfa(dfa);
foreach (Transition <string> transition in hopcroftDfa.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(hopcroftDfa, "HopcroftDfa");
Console.WriteLine("Image saved as HopcroftDfa.jpg");
}
private static void ConstructDfa()
{
Console.WriteLine("Please enter DFA alphabet");
string alphabet = Console.ReadLine();
Console.WriteLine("DFA should:");
Console.WriteLine("Select option");
Console.WriteLine("1: Begin with");
Console.WriteLine("2: Not begin with");
Console.WriteLine("3: No begin with rule");
ConsoleKeyInfo optionInfo = Console.ReadKey();
char beginWithOption = optionInfo.KeyChar;
Console.WriteLine("");
if (!ValidDfaOption(beginWithOption))
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
return;
}
Console.WriteLine("Enter line");
string beginWith = Console.ReadLine();
Console.WriteLine("Select option");
Console.WriteLine("1: Contain");
Console.WriteLine("2: Not contain");
Console.WriteLine("3: No contain rule");
optionInfo = Console.ReadKey();
char containOption = optionInfo.KeyChar;
Console.WriteLine("");
if (!ValidDfaOption(containOption))
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
return;
}
Console.WriteLine("Enter line");
string contain = Console.ReadLine();
Console.WriteLine("Select option");
Console.WriteLine("1: End with");
Console.WriteLine("2: Not end with");
Console.WriteLine("3: No end with rule");
optionInfo = Console.ReadKey();
char endWithOption = optionInfo.KeyChar;
Console.WriteLine("");
if (!ValidDfaOption(endWithOption))
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
return;
}
Console.WriteLine("Enter line");
string endWith = Console.ReadLine();
Automaat <string> .DfaGenerateValue param1;
Automaat <string> .DfaGenerateValue param2;
Automaat <string> .DfaGenerateValue param3;
Automaat <string> part1 = null;
Automaat <string> part2 = null;
Automaat <string> part3 = null;
List <Automaat <string> > setupParts = new List <Automaat <string> >();
if (beginWith != "" && beginWithOption != '3')
{
if (beginWithOption == '1')
{
param1 = new Automaat <string> .DfaGenerateValue
{
Parameter = beginWith,
IsNot = false,
Type = Automaat <string> .GeneratorType.BeginsWith
};
part1 = Automaat <string> .GenerateDfa(param1, alphabet.ToCharArray());
}
if (beginWithOption == '2')
{
param1 = new Automaat <string> .DfaGenerateValue
{
Parameter = beginWith,
IsNot = true,
Type = Automaat <string> .GeneratorType.BeginsWith
};
part1 = Automaat <string> .GenerateDfa(param1, alphabet.ToCharArray());
}
if (part1 == null)
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
return;
}
setupParts.Add(part1);
}
if (contain != "" && containOption != '3')
{
if (containOption == '1')
{
param2 = new Automaat <string> .DfaGenerateValue
{
Parameter = contain,
IsNot = false,
Type = Automaat <string> .GeneratorType.Contains
};
part2 = Automaat <string> .GenerateDfa(param2, alphabet.ToCharArray());
}
if (containOption == '2')
{
param2 = new Automaat <string> .DfaGenerateValue
{
Parameter = contain,
IsNot = true,
Type = Automaat <string> .GeneratorType.Contains
};
part2 = Automaat <string> .GenerateDfa(param2, alphabet.ToCharArray());
}
if (part2 == null)
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
return;
}
setupParts.Add(part2);
}
if (endWith != "" && beginWithOption != '3')
{
if (endWithOption == '1')
{
param3 = new Automaat <string> .DfaGenerateValue
{
Parameter = endWith,
IsNot = false,
Type = Automaat <string> .GeneratorType.EndsWith
};
part3 = Automaat <string> .GenerateDfa(param3, alphabet.ToCharArray());
}
if (beginWithOption == '2')
{
param3 = new Automaat <string> .DfaGenerateValue
{
Parameter = endWith,
IsNot = true,
Type = Automaat <string> .GeneratorType.EndsWith
};
part3 = Automaat <string> .GenerateDfa(param3, alphabet.ToCharArray());
}
if (part3 == null)
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
return;
}
setupParts.Add(part3);
}
;
;
Automaat <string> toUse = null;
;
if (setupParts.Count == 1)
{
toUse = setupParts[0];
}
else if (setupParts.Count == 2)
{
toUse = Automaat <string> .Union(setupParts[0], setupParts[1]);
}
else if (setupParts.Count == 3)
{
Automaat <string> takeOne = Automaat <string> .Union(setupParts[0], setupParts[1]);
Automaat <string> takeTwo = Automaat <string> .Union(takeOne, setupParts[2]);
toUse = takeTwo;
}
if (toUse != null)
{
Console.WriteLine("----- DFA generated -----");
foreach (Transition <string> transition in toUse.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(toUse, "DFA");
Console.WriteLine("Image saved as DFA.jpg");
Console.WriteLine();
Console.WriteLine("----- Optimizing custom DFA: Brzozowski's algorithm -----");
Automaat <string> brzozowskiDfa = NdfaToDfaConverter.OptimizeDfa(toUse);
foreach (Transition <string> transition in brzozowskiDfa.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(brzozowskiDfa, "BrzozowskiDFA");
Console.WriteLine("Image saved as BrzozowskiDFA.jpg");
// Optimize dfa Hopcroft
Console.WriteLine();
Console.WriteLine("----- Optimizing custom DFA: Hopcroft's algorithm -----");
Automaat <string> hopcroftDfa = HopcroftAlgorithm.MinimizeDfa(toUse);
foreach (Transition <string> transition in hopcroftDfa.Transitions)
{
Console.WriteLine(transition.ToString());
}
Console.Write("Amount of states in hopcroft DFA: ");
Console.WriteLine(hopcroftDfa.States.Count);
Console.WriteLine("Printing image");
GraphVizParser.PrintGraph(hopcroftDfa, "HopcroftDFA");
Console.WriteLine("Image saved as HopcroftDFA.jpg");
if (hopcroftDfa.States.Count > 25)
{
Console.WriteLine("[Warning] This hopcroft dfa has more than 25 states.");
Console.WriteLine("Due to char(ASCII) limitations, parsing issues could arise with printing this dfa correctly to an image");
Console.WriteLine("This is a third-party library (Graphviz) related issue");
Console.WriteLine("The above shown list of transitions from this hopcroft dfa ARE STILL CORRECT however");
}
}
else
{
Console.WriteLine("Invalid/Incorrect parameters entered, try again");
}
//Automaat<string> takeOne = Automaat<string>.Union(part1, part2);
//Automaat<string> takeTwo = Automaat<string>.Union(takeOne, part3);
//GraphVizParser.PrintGraph(toUse, "customDfa");
}