public override StringBuilder Print()
{
StringBuilder FAText = new StringBuilder(1000);
// Output Nodes
CIt_GraphNodes itn = new CIt_GraphNodes(m_graph);
for (itn.Begin(); !itn.End(); itn.Next())
{
FAText.Append(itn.M_CurrentItem.M_Label);
if (!itn.M_LastItem)
{
FAText.Append(", ");
}
else
{
FAText.Append("\n\n");
}
}
// Output edges
CIt_GraphEdges ite = new CIt_GraphEdges(m_graph);
for (ite.Begin(); !ite.End(); ite.Next())
{
FAText.Append("\n" + ite.M_CurrentItem.M_Source.M_Label + "---" + m_FAInfo.Info(ite.M_CurrentItem).M_TransitionCharSet.ToString() + "---->" +
ite.M_CurrentItem.M_Target.M_Label);
}
return(FAText);
}
public static void TestCaseBook()
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode u = mgraph.CreateGraphNode <CGraphNode>("u");
CGraphNode v = mgraph.CreateGraphNode <CGraphNode>("v");
CGraphNode w = mgraph.CreateGraphNode <CGraphNode>("w");
CGraphNode x = mgraph.CreateGraphNode <CGraphNode>("x");
CGraphNode y = mgraph.CreateGraphNode <CGraphNode>("y");
CGraphNode z = mgraph.CreateGraphNode <CGraphNode>("z");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(u, v, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(u, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x, v, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(v, y, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(w, y, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(w, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, z, GraphType.GT_DIRECTED);
DepthFirstSearch dfs = new DepthFirstSearch(mgraph);
dfs.Run();
DepthFirstSearchQueryInfo info = new DepthFirstSearchQueryInfo(mgraph, dfs);
CIt_GraphNodes it = new CIt_GraphNodes(mgraph);
for (it.Begin(); !it.End(); it.Next())
{
Console.WriteLine("Node {0}: arrival ({1}) - departure ({2})",
it.M_CurrentItem.M_Label, info.Arrival(it.M_CurrentItem), info.Departure(it.M_CurrentItem));
}
}
public override FA VisitRegexpAlternation(CASTElement currentNode)
{
CRegexpAlternation altNode = currentNode as CRegexpAlternation;
CSubsetConstructionAlgorithm subcon;
CHopcroftAlgorithm hopmin;
//1. Create FA
CThompsonAlternationTemplate alttempSyn = new CThompsonAlternationTemplate(this.GetHashCode());
FA leftFa = Visit(altNode.GetChild(ContextType.CT_REGEXPALTERNATION_TERMS, 0));
CIt_GraphNodes it = new CIt_GraphNodes(leftFa);
for (it.Begin(); !it.End(); it.Next())
{
leftFa.PrefixElementLabel(leftFa.GetFANodePrefix(it.M_CurrentItem), it.M_CurrentItem);
}
FA rightFa = Visit(altNode.GetChild(ContextType.CT_REGEXPALTERNATION_TERMS, 1));
it = new CIt_GraphNodes(rightFa);
for (it.Begin(); !it.End(); it.Next())
{
rightFa.PrefixElementLabel(rightFa.GetFANodePrefix(it.M_CurrentItem), it.M_CurrentItem);
}
//2.Synthesize the two FAs to a new one
m_currentNFA = alttempSyn.Sythesize(leftFa, rightFa, CGraph.CMergeGraphOperation.MergeOptions.MO_DEFAULT);
m_ReportingServices.ExctractThompsonStep(m_currentNFA, @"Alternation_" + m_currentNFA.M_Label + ".dot", this.GetHashCode());
m_ReportingServices.AddThompsonStepToReporting(m_currentNFA, this.GetHashCode());
//return the final-synthesized FA
return(m_currentNFA);
}
public override void Init()
{
CIt_GraphNodes itn = new CIt_GraphNodes(mGraph);
m_shortestPaths[m_source] = new Dictionary <CGraphNode, Path>();
for (itn.Begin(); !itn.End(); itn.Next())
{
if (itn.M_CurrentItem != m_source)
{
m_outputShortestPathsInfo.CreateInfo(itn.M_CurrentItem,
new NodePathInfo()
{
MDistance = null, MPredecessor = null
});
}
else
{
m_outputShortestPathsInfo.CreateInfo(itn.M_CurrentItem,
new NodePathInfo()
{
MDistance = 0, MPredecessor = null
});
}
}
}
private void Debug()
{
CIt_GraphNodes it = new CIt_GraphNodes(mGraph);
for (it.Begin(); !it.End(); it.Next())
{
Console.WriteLine("{0}.distance={1}", it.M_CurrentItem.M_Label, Distance(it.M_CurrentItem));
if (Predecessor(it.M_CurrentItem) != null)
{
Console.WriteLine("{0}.predecessor={1}", it.M_CurrentItem.M_Label,
Predecessor(it.M_CurrentItem).M_Label);
}
}
Console.WriteLine("Shortest Paths {0}->*", m_source.M_Label);
for (it.Begin(); !it.End(); it.Next())
{
foreach (var cGraphNode in m_shortestPaths[m_source][it.M_CurrentItem])
{
Console.Write("{0},", cGraphNode.M_Label);
}
Console.WriteLine();
}
}
public override void Init()
{
CIt_GraphNodes it = new CIt_GraphNodes(m_graph);
m_BFSData.CreateInfo(m_nodeVisitList);
for (it.Begin(); !it.End(); it.Next())
{
if (it.M_CurrentItem != m_source)
{
m_BFSData.CreateInfo(it.M_CurrentItem,
new BFSNodeInfo()
{
MDistance = -1, MColor = NodeColor.NC_WHITE
});
}
else
{
m_BFSData.CreateInfo(it.M_CurrentItem,
new BFSNodeInfo()
{
MDistance = 0, MColor = NodeColor.NC_GRAY
});
}
}
m_Q.Enqueue(m_source);
}
public override FA VisitRegexpClosure(CASTElement currentNode)
{
CRegexpClosure closNode = currentNode as CRegexpClosure;
//1.Create FA
CThompsonClosureTemplate newFA = new CThompsonClosureTemplate(this.GetHashCode(), currentNode.M_Text);
//2.Check the type of the closure
if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_NONEORMULTIPLE)
{
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesizeNoneOrMul(customFA);
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_ONEORMULTIPLE)
{
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesisOneOrMul(customFA);
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_ONEORZERO)
{
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesizeOneOrNone(customFA);
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_FINITECLOSURE)
{
CClosureRange rangeNode = closNode.GetChild(ContextType.CT_REGEXPCLOSURE_QUANTIFIER, 0) as CClosureRange;
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesizeFinite(customFA, rangeNode.M_ClosureMultiplicityLB,
rangeNode.M_ClosureMultiplicityUB);
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_NONEORMULTIPLE_NONGREEDY)
{
//TODO
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_ONEORMULTIPLE_NONGREEDY)
{
//TODO
}
else
{
Console.WriteLine("No proper input");
}
// Prefix the nodes of the new NFA with the prefix for the current regular expression
CIt_GraphNodes it = new CIt_GraphNodes(m_currentNFA);
for (it.Begin(); !it.End(); it.Next())
{
m_currentNFA.PrefixElementLabel(m_currentRegularExpression.M_StatementID, it.M_CurrentItem);
}
m_ReportingServices.ExctractThompsonStep(m_currentNFA, @"Closure_" + m_currentNFA.M_Label + ".dot", this.GetHashCode());
m_ReportingServices.AddThompsonStepToReporting(m_currentNFA, this.GetHashCode());
//4.Pass FA to the predecessor
return(m_currentNFA);
}
private FA CreateNewFA(FA synth)
{
CGraphNode oldEntryNode, oldExitNode;
FA m_currentFA = new FA();
m_ThompsonInfo = new ThompsonInfo(m_currentFA, m_ThompsonInfoKey);
m_ThompsonInfo.InitFAInfo(new ThompsonFAInfo());
//2.Merge graph
m_mergeOperation = m_currentFA.Merge(synth, CGraph.CMergeGraphOperation.MergeOptions.MO_DEFAULT);
m_mergeOperation.MergeGraphInfo(synth, GraphElementType.ET_EDGE, FA.m_FAINFOKEY);
m_mergeOperation.MergeGraphInfo(synth, GraphElementType.ET_GRAPH, FA.m_FAINFOKEY);
m_mergeOperation.MergeGraphInfo(synth, GraphElementType.ET_NODE, FA.m_FAINFOKEY);
m_mergeOperation.MergeGraphInfo(synth, GraphElementType.ET_EDGE, m_ThompsonInfoKey);
m_mergeOperation.MergeGraphInfo(synth, GraphElementType.ET_GRAPH, m_ThompsonInfoKey);
m_mergeOperation.MergeGraphInfo(synth, GraphElementType.ET_NODE, m_ThompsonInfoKey);
// Create boundary nodes
m_newFASource = m_currentFA.CreateGraphNode <CGraphNode>();
m_ThompsonInfo.InitNodeInfo(m_newFASource, new ThompsonNodeFAInfo());
m_currentFA.AddGraphEdge <CGraphEdge, CGraphNode>(m_newFASource, m_mergeOperation.GetMirrorNode(synth.M_Initial), GraphType.GT_DIRECTED);
m_newFATarget = m_currentFA.CreateGraphNode <CGraphNode>();
m_ThompsonInfo.InitNodeInfo(m_newFATarget, new ThompsonNodeFAInfo());
m_currentFA.AddGraphEdge <CGraphEdge, CGraphNode>(m_mergeOperation.GetMirrorNode(synth.GetFinalStates()[0]), m_newFATarget, GraphType.GT_DIRECTED);
//4.Create the initial and the final node
oldEntryNode = m_mergeOperation.GetMirrorNode(synth.M_Initial);
oldExitNode = m_mergeOperation.GetMirrorNode(synth.GetFinalStates()[0]);
m_currentFA.M_Initial = m_newFASource;
m_currentFA.SetFinalState(m_newFATarget);
m_currentFA.UpdateAlphabet();
// Update closure information from operand closure
FAInfo currentFAInfo = UpdateClosureInformation(synth, m_currentFA, m_mergeOperation);
// Update closure information from current closure
m_currentFAloop = new FALoop();
m_currentFAloop.MEntryNode = oldEntryNode;
m_currentFAloop.MExitNode = oldExitNode;
m_currentFAloop.MLoopSerial = m_currentClosureSerial;
CIt_GraphNodes it = new CIt_GraphNodes(m_currentFA);
for (it.Begin(); !it.End(); it.Next())
{
if (it.M_CurrentItem != m_currentFA.M_Initial &&
it.M_CurrentItem != m_currentFA.GetFinalStates()[0])
{
m_currentFAloop.MParticipatingNodes.Add(it.M_CurrentItem);
}
}
// Add new closure to the current FA
currentFAInfo.AddFALoop(m_currentFAloop);
return(m_currentFA);
}
public override FA VisitLexerDescription(CASTElement currentNode)
{
int i = 0;
FA leftFa = null, rightFa;
CGraph.CMergeGraphOperation.MergeOptions mergeOptions = CGraph.CMergeGraphOperation.MergeOptions.MO_DEFAULT;
CSubsetConstructionAlgorithm subcon;
CHopcroftAlgorithm hopmin;
CLexerDescription lexerDescription = currentNode as CLexerDescription;
List <CASTElement> rExpStatements = lexerDescription.GetContextChildren(ContextType.CT_LEXERDESCRIPTION_BODY);
// Preserve labels of RegExp-derived NFA
if (!m_options.IsSet(ThompsonOptions.TO_STEPS))
{
mergeOptions = CGraph.CMergeGraphOperation.MergeOptions.MO_PRESERVELABELS;
}
//1. Create FA
foreach (var rExpStatement in rExpStatements)
{
if (i > 0)
{
rightFa = Visit(rExpStatement);
//2.Synthesize the two FAs to a new one
CThompsonAlternationTemplate alttempSyn = new CThompsonAlternationTemplate(this.GetHashCode());
leftFa = alttempSyn.Sythesize(leftFa, rightFa, mergeOptions);
// Prefix node elements of the resulting graph with
CIt_GraphNodes it = new CIt_GraphNodes(leftFa);
for (it.Begin(); !it.End(); it.Next())
{
leftFa.PrefixElementLabel(leftFa.GetFANodePrefix(it.M_CurrentItem), it.M_CurrentItem);
}
}
else
{
leftFa = Visit(rExpStatement);
}
i++;
}
m_NFA = leftFa;
m_NFA.UpdateAlphabet();
m_ReportingServices.ExctractThompsonStep(m_NFA, @"merge.dot", this.GetHashCode());
if (i > 1)
{
m_ReportingServices.AddThompsonStepToReporting(m_NFA, this.GetHashCode(), true);
}
else
{
m_ReportingServices.ThompsonStepsGenerate();
}
//return the final-synthesized FA
return(m_NFA);
}
public void FindAllPairsShortestPaths()
{
CIt_GraphNodes itn = new CIt_GraphNodes(mGraph);
for (itn.Begin(); !itn.End(); itn.Next())
{
m_source = itn.M_CurrentItem;
Run();
}
}
public void Debug()
{
DepthFirstSearchQueryInfo info = new DepthFirstSearchQueryInfo(m_graph, this);
CIt_GraphNodes it = new CIt_GraphNodes(m_graph);
for (it.Begin(); !it.End(); it.Next())
{
Console.WriteLine("Node {0}: arrival ({1}) - departure ({2})",
it.M_CurrentItem.M_Label, info.Arrival(it.M_CurrentItem), info.Departure(it.M_CurrentItem));
}
}
/// <summary>
/// Gives the initial mapping of labels to elements.
/// Called by the constructor. Must be defined in subclasses
/// </summary>
protected override void LabelElements()
{
string label;
// Create iterator
CIt_GraphNodes it = new CIt_GraphNodes(m_graph);
for (it.Begin(); !it.End(); it.Next())
{
label = it.M_CurrentItem.ToString();
SetLabel(it.M_CurrentItem, label);
}
}
protected override void LabelElements()
{
string label;
int serialNumber = 0;
// Create iterator
CIt_GraphNodes it = new CIt_GraphNodes(m_graph);
for (it.Begin(); !it.End(); it.Next())
{
label = m_prefix + serialNumber++;
SetLabel(it.M_CurrentItem, label);
}
}
private void GeneratePaths()
{
CIt_GraphNodes it = new CIt_GraphNodes(mGraph);
CGraphNode m_node;
for (it.Begin(); !it.End(); it.Next())
{
m_shortestPaths[m_source][it.M_CurrentItem] = new Path();
m_node = it.M_CurrentItem;
while (m_node != null)
{
m_shortestPaths[m_source][it.M_CurrentItem].Insert(m_node, 0);
m_node = Predecessor(m_node);
}
}
}
/// <summary>
/// Returns a string that contains the element and its info contents
/// </summary>
/// <returns></returns>
public override string ToString()
{
StringBuilder sBuilder = new StringBuilder();
string s = "";
switch (M_ElementType)
{
case GraphElementType.ET_NODE:
s = "Node ";
break;
case GraphElementType.ET_EDGE:
s = "Edge ";
break;
case GraphElementType.ET_GRAPH:
s = "Graph ";
break;
}
sBuilder.Append(s + M_Label + ":");
sBuilder.AppendLine();
foreach (KeyValuePair <object, object> key in m_algorithmOutput)
{
sBuilder.Append("key :" + key.Key.ToString());
sBuilder.Append("info :" + key.Value.ToString());
}
if (M_ElementType == GraphElementType.ET_GRAPH)
{
CIt_GraphNodes itn = new CIt_GraphNodes(this as CGraph);
for (itn.Begin(); !itn.End(); itn.Next())
{
sBuilder.Append(itn.M_CurrentItem.ToString());
sBuilder.AppendLine();
}
CIt_GraphEdges itg = new CIt_GraphEdges(this as CGraph);
for (itg.Begin(); !itg.End(); itg.Next())
{
sBuilder.Append(itg.M_CurrentItem.ToString());
sBuilder.AppendLine();
}
}
return(sBuilder.ToString());
}
public override FA VisitRegexpClosure(CASTElement currentNode)
{
CRegexpClosure closNode = currentNode as CRegexpClosure;
//1.Create FA
CThompsonClosureTemplate newFA = new CThompsonClosureTemplate();
//2.Check the type of the closure
if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_NONEORMULTIPLE)
{
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesizeNoneOrMul(customFA);
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_ONEORMULTIPLE)
{
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesisOneOrMul(customFA);
}
else if (closNode.M_ClosureType == CRegexpClosure.ClosureType.CLT_ONEORZERO)
{
FA customFA = Visit(closNode.GetChild(ContextType.CT_REGEXPCLOSURE_REGEXP, 0));
m_currentNFA = newFA.SynthesizeOneOrNone(customFA);
}
else
{
Console.WriteLine("No proper input");
}
CIt_GraphNodes it = new CIt_GraphNodes(m_currentNFA);
for (it.Begin(); !it.End(); it.Next())
{
m_currentNFA.PrefixElementLabel(m_currentRegularExpression.M_StatementID, it.M_CurrentItem);
}
m_ReportingServices.ExctractThompsonStep(m_currentNFA, @"../bin/Debug/Closure_" + m_currentNFA.M_Label + ".dot");
m_ReportingServices.AddThompsonStepToReporting(m_currentNFA);
//4.Pass FA to the predecessor
return(m_currentNFA);
}
public override void Init()
{
CIt_GraphNodes it = new CIt_GraphNodes(m_graph);
for (it.Begin(); !it.End(); it.Next())
{
m_outputDepthFirstSearch.CreateInfo(it.M_CurrentItem, new DepthFirstSearchNodeInfo()
{
MColor = NodeColor.NC_WHITE,
MDeparture = -1,
MArrival = -1
});
}
m_time = 0;
for (it.Begin(); !it.End(); it.Next())
{
if (Color(it.M_CurrentItem) == NodeColor.NC_WHITE)
{
Visit(it.M_CurrentItem);
}
}
}
public override void Init()
{
CGraphNode newSTNode;
m_dfsSpanningTree = CDFSSpanningTree.CreateGraph();
CIt_GraphNodes it = new CIt_GraphNodes(m_sourceGraphs[0]);
CIt_GraphRootNodes it1 = new CIt_GraphRootNodes(m_sourceGraphs[0]);
// Paint the nodes white color (0)
for (it.Begin(); !it.End(); it.Next())
{
//CreateInfo(it.M_CurrentItem,
// new NodeInfo_DFS(){ m_color = 0},
// this);
newSTNode = m_dfsSpanningTree.CreateGraphNode("L" + it.M_CurrentItem.M_Label);
newSTNode[m_dfsSpanningTree] = new NodeInfo_DFSSpanningTree()
{
M_Preorder = 0, M_Postorder = 0
};
m_Mappping.SetOriginalToDerivedNode(it.M_CurrentItem, newSTNode);
}
// Start at a random node. If the graph is not completely traversed
// the Visit function will return and another node ( not already
// visited ) will be used as starting node. This works fine for
// undirected graphs. For tree graphs it is recomended to start
// from the tree root node because a different visiting pattern is
// produced for different starting nodes
for (it1.Begin(); !it1.End(); it1.Next())
{
if (Color(it1.M_CurrentItem) == 0)
{
Visit(it1.M_CurrentItem);
}
}
}
public override void Init()
{
AbstractGraphIterator <CGraphNode> it1;
if (m_startAtRootNodes)
{
it1 = new CIt_GraphRootNodes(m_sourceGraphs[0]);
}
else
{
it1 = new CIt_GraphNodes(m_sourceGraphs[0]);
}
// Paint the nodes white color (0)
for (it1.Begin(); !it1.End(); it1.Next())
{
//CreateInfo(it1.M_CurrentItem, new NodeInfo_DFS(0),this);
}
// Start at a random node. If the graph is not completely traversed
// the Visit function will return and another node ( not already
// visited ) will be used as starting node. This works fine for
// undirected graphs. For tree graphs it is recomended to start
// from the tree root node because a different visiting pattern is
// produced for different starting nodes
for (it1.Begin(); !it1.End(); it1.Next())
{
if (Color(it1.M_CurrentItem) == 0)
{
Visit(it1.M_CurrentItem);
}
}
// EVENT : Raising the OnInit event
OnInit(EventArgs.Empty);
}
public override FA VisitRegexpConcatenation(CASTElement currentNode)
{
CRegexpConcatenation altNode = currentNode as CRegexpConcatenation;
//1. Create FA
CThompsonConcatenationTemplate alttempSyn = new CThompsonConcatenationTemplate(this.GetHashCode());
FA leftFa = Visit(altNode.GetChild(ContextType.CT_REGEXPCONCATENATION_TERMS, 0));
FA rightFa = Visit(altNode.GetChild(ContextType.CT_REGEXPCONCATENATION_TERMS, 1));
//2.Synthesize the two FAs to a new one
m_currentNFA = alttempSyn.Synthesize(leftFa, rightFa);
CIt_GraphNodes it = new CIt_GraphNodes(m_currentNFA);
for (it.Begin(); !it.End(); it.Next())
{
m_currentNFA.PrefixElementLabel(m_currentRegularExpression.M_StatementID, it.M_CurrentItem);
}
m_ReportingServices.ExctractThompsonStep(m_currentNFA, @"Concatenation_" + m_currentNFA.M_Label + ".dot", this.GetHashCode());
m_ReportingServices.AddThompsonStepToReporting(m_currentNFA, this.GetHashCode());
return(m_currentNFA);
}
public override StringBuilder Print()
{
StringBuilder graphvizStringBuilder = new StringBuilder(1000);
string header = "digraph G" + m_graph.M_SerialNumber + "{\r\n";
string graphedge_operator = "->";
CIt_GraphNodes itn = new CIt_GraphNodes(m_graph);
CIt_GraphEdges itg = new CIt_GraphEdges(m_graph);
FA fa = m_graph as FA;
// Print header if necessary
// Print the header if the graph is printed alone independently and not
// in the context for example of a multigraph printing
if (!m_options.IsSet(ThompsonOptions.TO_COMBINEGRAPHS))
{
graphvizStringBuilder.Append(header);
}
for (itn.Begin(); !itn.End(); itn.Next())
{
if (fa.GetFinalStates().Count != 0 && fa.GetFinalStates().Contains(itn.M_CurrentItem))
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [peripheries=2];\n");
}
else if (itn.M_CurrentItem == fa.M_Initial)
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [style=filled,fillcolor=green];\n");
}
else if (m_thompsonInfo.IsNodeClosureEntrance(itn.M_CurrentItem))
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [style=filled,fillcolor=red];\n");
}
else if (m_thompsonInfo.IsNodeClosureExit(itn.M_CurrentItem))
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [style=filled,fillcolor=purple];\n");
}
else
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\";\n");
}
}
// Print all edges of the graph
for (itg.Begin(); !itg.End(); itg.Next())
{
CGraphEdge g = itg.M_CurrentItem;
string source, target;
source = g.M_Source.M_Label;
target = g.M_Target.M_Label;
graphvizStringBuilder.AppendFormat("\"{0}\"" + graphedge_operator + "\"{1}\"",
source, target);
string s = m_FAInfo.Info(g).M_TransitionCharSet?.ToString();
if (s != null)
{
graphvizStringBuilder.AppendFormat(" [style = bold, label = \"" + m_FAInfo.Info(g).M_TransitionCharSet?.ToString() + "\"]");
}
else
{
if (m_thompsonInfo.IsNodeClosureExit(g.M_Source) &&
m_thompsonInfo.IsNodeClosureEntrance(g.M_Target))
{
graphvizStringBuilder.AppendFormat(" [color=red,style = bold, label = \"" + m_FAInfo.Info(g).M_TransitionCharSet?.ToString() + "\"]");
}
}
graphvizStringBuilder.Append(";\r\n");
}
// Print footer if necessary
// Print the header if the graph is printed alone independently and not
// in the context for example of a multigraph printing
if (!m_options.IsSet(ThompsonOptions.TO_COMBINEGRAPHS))
{
graphvizStringBuilder.Append("}\r\n");
}
return(graphvizStringBuilder);
}
public override StringBuilder Print()
{
// Allocate a stringbuiler object and allocate space for 1000 characters
StringBuilder graphvizStringBuilder = new StringBuilder(1000);
CIt_GraphNodes itn = new CIt_GraphNodes(m_graph);
CIt_GraphEdges itg = new CIt_GraphEdges(m_graph);
CSubsetConstructionInfo subsetInfo = new CSubsetConstructionInfo(m_graph, m_subsetInfoKey);
Dictionary <int, List <CGraphNode> > closuresMap;
FA fa = m_graph as FA;
string graphedge_operator = "->";
closuresMap = subsetInfo.GetClosureNodesMapping();
//1. generate header
string header = "digraph G" + m_graph.M_SerialNumber + "{\r\n";
graphvizStringBuilder.Append(header);
foreach (KeyValuePair <int, List <CGraphNode> > closure in closuresMap)
{
string subgraphHeader = "\tsubgraph cluster" + closure.Key + " {\r\n";
string subgraphBody = "\t\tnode [style=filled];\r\n" +
"\t\tstyle=filled;\r\n" +
"\t\tcolor=lightgrey;\r\n" +
"\t\tlabel =\"" + subsetInfo.Info(closure.Value[0]).M_ClosureExpression +
"\";\r\n\t\t";
graphvizStringBuilder.Append(subgraphHeader + subgraphBody);
foreach (CGraphNode node in closure.Value)
{
graphvizStringBuilder.Append(node.M_Label + ";");
}
graphvizStringBuilder.AppendLine();
graphvizStringBuilder.Append("\t}");
}
// Print all nodes
for (itn.Begin(); !itn.End(); itn.Next())
{
if (fa.GetFinalStates().Count != 0 && fa.GetFinalStates().Contains(itn.M_CurrentItem))
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [peripheries=2];\n");
}
else if (itn.M_CurrentItem == fa.M_Initial)
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label +
"\" [style=filled,fillcolor=green];\n");
}
else
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\";\n");
}
}
// Print all edges of the graph
for (itg.Begin(); !itg.End(); itg.Next())
{
CGraphEdge g = itg.M_CurrentItem;
string source, target;
source = g.M_Source.M_Label;
target = g.M_Target.M_Label;
graphvizStringBuilder.AppendFormat("\"{0}\"" + graphedge_operator + "\"{1}\"",
source, target);
string s = m_FAInfo.Info(g).M_TransitionCharSet?.ToString();
if (s != null)
{
graphvizStringBuilder.AppendFormat(" [style = bold, label = \"" + m_FAInfo.Info(g).M_TransitionCharSet?.ToString() + "\"]");
}
else
{
}
graphvizStringBuilder.Append(";\r\n");
}
graphvizStringBuilder.Append("}\r\n");
return(graphvizStringBuilder);
}
public static void BookExampleTestcase()
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode x = mgraph.CreateGraphNode <CGraphNode>("x");
CGraphNode y = mgraph.CreateGraphNode <CGraphNode>("y");
CGraphNode z = mgraph.CreateGraphNode <CGraphNode>("z");
CGraphNode t = mgraph.CreateGraphNode <CGraphNode>("t");
CGraphNode s = mgraph.CreateGraphNode <CGraphNode>("s");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, y, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x, t, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, s, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, t, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, y, GraphType.GT_DIRECTED);
// 2. Associate weights with the edges of the graph
CGraphQueryInfo <int, int, int> weights = new CGraphQueryInfo <int, int, int>(mgraph, 255);
weights.CreateInfo(y, x, -3);
weights.CreateInfo(x, t, -2);
weights.CreateInfo(t, x, 5);
weights.CreateInfo(z, x, 7);
weights.CreateInfo(y, z, 9);
weights.CreateInfo(t, y, 8);
weights.CreateInfo(t, z, -4);
weights.CreateInfo(s, t, 6);
weights.CreateInfo(s, y, 7);
weights.CreateInfo(z, s, 2);
// 3. Run the BellmanFord algorithm
BellmanFord bl = new BellmanFord(mgraph, s, 255);
bl.FindAllPairsShortestPaths();
// 4. Print Paths
CGraphQueryInfo <int, int, Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > > shortestPath = new CGraphQueryInfo <int, int, Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > >(mgraph, bl);
CIt_GraphNodes i = new CIt_GraphNodes(mgraph);
CIt_GraphNodes j = new CIt_GraphNodes(mgraph);
Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > paths =
(Dictionary <CGraphNode, Dictionary <CGraphNode, Path> >)(shortestPath.Info());
for (i.Begin(); !i.End(); i.Next())
{
Console.WriteLine();
for (j.Begin(); !j.End(); j.Next())
{
Console.WriteLine();
if (i.M_CurrentItem != j.M_CurrentItem)
{
Console.Write(paths[i.M_CurrentItem][j.M_CurrentItem]);
}
}
}
}
public static void TestCase3x3()
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode x1 = mgraph.CreateGraphNode <CGraphNode>("1");
CGraphNode x2 = mgraph.CreateGraphNode <CGraphNode>("2");
CGraphNode x3 = mgraph.CreateGraphNode <CGraphNode>("3");
CGraphNode x4 = mgraph.CreateGraphNode <CGraphNode>("4");
CGraphNode x5 = mgraph.CreateGraphNode <CGraphNode>("5");
CGraphNode x6 = mgraph.CreateGraphNode <CGraphNode>("6");
CGraphNode x7 = mgraph.CreateGraphNode <CGraphNode>("7");
CGraphNode x8 = mgraph.CreateGraphNode <CGraphNode>("8");
CGraphNode x9 = mgraph.CreateGraphNode <CGraphNode>("9");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x1, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x1, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x1, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x1, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x1, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x1, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x3, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x3, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x3, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x3, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x3, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x3, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x7, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x7, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x7, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x7, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x9, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x9, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x9, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x9, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x7, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x7, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x9, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x9, x8, GraphType.GT_DIRECTED);
// 2. Associate weights with the edges of the graph
CGraphQueryInfo <int, int, int> weights = new CGraphQueryInfo <int, int, int>(mgraph, 255);
weights.CreateInfo(x1, x2, 1);
weights.CreateInfo(x2, x1, 1);
weights.CreateInfo(x1, x5, 1);
weights.CreateInfo(x5, x1, 1);
weights.CreateInfo(x1, x4, 1);
weights.CreateInfo(x4, x1, 1);
weights.CreateInfo(x2, x4, 3);
weights.CreateInfo(x4, x2, 3);
weights.CreateInfo(x2, x3, 1);
weights.CreateInfo(x3, x2, 1);
weights.CreateInfo(x2, x6, 3);
weights.CreateInfo(x6, x2, 3);
weights.CreateInfo(x2, x5, 1);
weights.CreateInfo(x5, x2, 1);
weights.CreateInfo(x3, x5, 3);
weights.CreateInfo(x5, x3, 3);
weights.CreateInfo(x3, x6, 1);
weights.CreateInfo(x6, x3, 1);
weights.CreateInfo(x4, x5, 1);
weights.CreateInfo(x5, x4, 1);
weights.CreateInfo(x4, x7, 1);
weights.CreateInfo(x7, x4, 1);
weights.CreateInfo(x4, x8, 3);
weights.CreateInfo(x8, x4, 3);
weights.CreateInfo(x5, x6, 1);
weights.CreateInfo(x6, x5, 1);
weights.CreateInfo(x5, x7, 3);
weights.CreateInfo(x7, x5, 3);
weights.CreateInfo(x5, x8, 1);
weights.CreateInfo(x8, x5, 1);
weights.CreateInfo(x5, x9, 3);
weights.CreateInfo(x9, x5, 3);
weights.CreateInfo(x6, x8, 3);
weights.CreateInfo(x8, x6, 3);
weights.CreateInfo(x6, x9, 1);
weights.CreateInfo(x9, x6, 1);
weights.CreateInfo(x7, x8, 1);
weights.CreateInfo(x8, x7, 1);
weights.CreateInfo(x8, x9, 1);
weights.CreateInfo(x9, x8, 1);
// 3. Run the BellmanFord algorithm
BellmanFord bl = new BellmanFord(mgraph, x1, 255);
bl.FindAllPairsShortestPaths();
// 4. Print Paths
BellmanFordQueryInfo shortestPath = new BellmanFordQueryInfo(mgraph, bl);
CIt_GraphNodes i = new CIt_GraphNodes(mgraph);
CIt_GraphNodes j = new CIt_GraphNodes(mgraph);
Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > paths =
shortestPath.ShortestPaths();
for (i.Begin(); !i.End(); i.Next())
{
Console.WriteLine();
for (j.Begin(); !j.End(); j.Next())
{
Console.WriteLine();
if (i.M_CurrentItem != j.M_CurrentItem)
{
Console.Write(paths[i.M_CurrentItem][j.M_CurrentItem]);
}
}
}
}
public void Init()
{
// List of DFA nodes in minimized DFA node
List <CGraphNode> configurationAcc, configurationNonAcc;
// Create configuration (min-DFA node) for accepted nodes
CGraphNode acceptedConf = m_minimizedDFA.CreateGraphNode <CGraphNode>();
// Create a list of initial-DFA nodes that are registered as accepted nodes
configurationAcc = new List <CGraphNode>();
// Store the list for initial-DFA accepted nodes in the min-DFA for accepted nodes
SetNodesInConfiguration(acceptedConf, configurationAcc);
// Create configuration (min-DFA node) for non-accepted nodes
CGraphNode non_acceptedConf = m_minimizedDFA.CreateGraphNode <CGraphNode>();
// Create a list for initial-DFA nodes that are registered as non-accepted nodes
configurationNonAcc = new List <CGraphNode>();
// Store the list of initial-DFA non-accepted node in the min-DFA for accepted nodes
SetNodesInConfiguration(non_acceptedConf, configurationNonAcc);
// Separate accepted from non-accepted nodes into two distinct
// configurations. Iterate over the input DFA and place the
// accepted node into configurationAcc and none accepted nodes
// into configurationNonAcc
CIt_GraphNodes it = new CIt_GraphNodes(m_DFA);
for (it.Begin(); !it.End(); it.Next())
{
if (m_DFA.GetFinalStates().Contains(it.M_CurrentItem))
{
// Record in the input DFA node the in which minimized DFA node
// will be placed
SetNodeConfiguration(it.M_CurrentItem, acceptedConf);
configurationAcc.Add(it.M_CurrentItem);
}
else
{
// Record in the input DFA node the in which minimized DFA node
// will be placed
SetNodeConfiguration(it.M_CurrentItem, non_acceptedConf);
configurationNonAcc.Add(it.M_CurrentItem);
}
}
// ************************* Debug Initialization ***************************
m_DFA.RegisterGraphPrinter(new FATextPrinter(m_DFA));
m_DFA.Generate("HopCroft_InitialDFA_.txt");
m_reporting.SetInitialMinDFAStatesContents(acceptedConf, configurationAcc, non_acceptedConf, configurationNonAcc);
int nodeCount = 0;
int iteration_count = 0;
CIt_GraphNodes minDFA_it = new CIt_GraphNodes(m_minimizedDFA);
// Iterate while the algorithm reaches a fixed point state
while (nodeCount != m_minimizedDFA.M_NumberOfNodes)
{
nodeCount = m_minimizedDFA.M_NumberOfNodes;
// ************************* Debug ***************************
CIterationRecord currentIteration = m_reporting.AddIteration(iteration_count);
for (minDFA_it.Begin(); !minDFA_it.End(); minDFA_it.Next())
{
// ************************* Debug ***************************
currentIteration.M_NodesToInspect.Add(minDFA_it.M_CurrentItem);
currentIteration.M_InitialNodesConfiguration.Add(minDFA_it.M_CurrentItem, new List <CGraphNode>(GetNodesInConfiguration(minDFA_it.M_CurrentItem)));
Split(minDFA_it.M_CurrentItem);
}
}
// Draw the final edges
// Edges between nodes of the initial DFA are mapped to edges between
// configurations in minimized-DFA. Thus, edges are drawn between two
// min-DFA related configurations when their corresponding nodes are
// connected and their transition character set is combined
CIt_GraphNodes minit1 = new CIt_GraphNodes(m_minimizedDFA);
CIt_GraphNodes minit2 = new CIt_GraphNodes(m_minimizedDFA);
List <CGraphNode> confs, conft;
CGraphEdge edge, newedge;
for (minit1.Begin(); !minit1.End(); minit1.Next())
{
for (minit2.Begin(); !minit2.End(); minit2.Next())
{
confs = GetNodesInConfiguration(minit1.M_CurrentItem);
conft = GetNodesInConfiguration(minit2.M_CurrentItem);
foreach (CGraphNode snode in confs)
{
foreach (CGraphNode tnode in conft)
{
edge = m_DFA.Edge(snode, tnode);
if (edge != null)
{
// Disallow duplicate edges between nodes of the minimized DFA
newedge = m_minimizedDFA.Edge(minit1.M_CurrentItem, minit2.M_CurrentItem);
if (newedge == null)
{
newedge = m_minimizedDFA.AddGraphEdge <CGraphEdge, CGraphNode>(minit1.M_CurrentItem, minit2.M_CurrentItem, GraphType.GT_DIRECTED);
}
// Add transition characters
if (GetMinDFAStateTransitionCharacterSet(newedge) == null)
{
SetMinDFAStateTransitionCharacterSet(newedge, new CCharRangeSet(false));
m_minimizedDFA.SetFAEdgeInfo(newedge, new CCharRangeSet(false));
}
CCharRangeSet charset = GetMinDFAStateTransitionCharacterSet(newedge);
m_minimizedDFA.GetFAEdgeInfo(newedge).AddSet(m_DFA.GetFAEdgeInfo(edge));
}
}
}
}
}
// Detect accepted nodes in minimized DFA
CIt_GraphNodes it1 = new CIt_GraphNodes(m_minimizedDFA);
for (it1.Begin(); !it1.End(); it1.Next())
{
List <CGraphNode> configuration = GetNodesInConfiguration(it1.M_CurrentItem);
List <CGraphNode> finals = m_DFA.GetFinalStates();
foreach (CGraphNode node in configuration)
{
if (finals.Contains(node))
{
m_minimizedDFA.SetFinalState(it1.M_CurrentItem);
}
}
}
// Detect initial state of minimized DFA
for (it1.Begin(); !it1.End(); it1.Next())
{
List <CGraphNode> configuration = GetNodesInConfiguration(it1.M_CurrentItem);
CGraphNode initial = m_DFA.M_Initial;
foreach (CGraphNode node in configuration)
{
if (initial == node)
{
m_minimizedDFA.M_Initial = it1.M_CurrentItem;
}
}
}
// Set Final minimized-DFA labels
for (it1.Begin(); !it1.End(); it1.Next())
{
List <CGraphNode> conf = GetNodesInConfiguration(it1.M_CurrentItem);
foreach (CGraphNode iNode in conf)
{
HashSet <string> prefs = m_DFA.GetFANodePrefixLabels(iNode);
foreach (string s in prefs)
{
m_minimizedDFA.SetFANodePrefix(s, it1.M_CurrentItem);
}
foreach (uint dependency in m_DFA.GetFANodeLineDependencies(iNode))
{
m_minimizedDFA.SetFANodeLineDependency(dependency, it1.M_CurrentItem);
}
}
m_minimizedDFA.PrefixElementLabel(m_minimizedDFA.GetFANodePrefix(it1.M_CurrentItem), it1.M_CurrentItem);
}
m_reporting.Report("HOPCROFTReport.txt");
FASerializer serializer = new FASerializer(m_minimizedDFA);
serializer.Print();
m_DFA.RegisterGraphPrinter(new FAGraphVizPrinter(m_minimizedDFA, new UOPCore.Options <ThompsonOptions>()));
m_DFA.Generate(@"minimizedDFA.dot", true);
}
/// <summary>
/// Prints the graph into a StringBuilder object.
/// Optionally the header and footer of the .dot file can be ommited for use of the
/// graph edges in the multi layer graph printer.
/// </summary>
/// <param name="onlyedges">if set to <c>true</c> [onlyedges] the graph is printed as a standalone graph.</param>
/// <returns></returns>
/// <exception cref="System.NotImplementedException"></exception>
public override StringBuilder Print()
{
// Allocate a stringbuiler object and allocate space for 1000 characters
StringBuilder graphvizStringBuilder = new StringBuilder(1000);
string graphedge_operator = " ";
string header = "";
string headerProperties = "";
CIt_GraphNodes itn = new CIt_GraphNodes(m_graph);
CIt_GraphEdges itg = new CIt_GraphEdges(m_graph);
FA fa = m_graph as FA;
switch (m_graph.M_GraphType)
{
case GraphType.GT_UNDIRECTED:
graphedge_operator = "--";
header = "graph G" + m_graph.M_SerialNumber + "{\r\n";
header += headerProperties;
break;
case GraphType.GT_DIRECTED:
graphedge_operator = "->";
header = "digraph G" + m_graph.M_SerialNumber + "{\r\n";
header += headerProperties;
break;
case GraphType.GT_MIXED:
break;
}
// Print header if necessary
// Print the header if the graph is printed alone independently and not
// in the context for example of a multigraph printing
if (!m_options.IsSet(ThompsonOptions.TO_COMBINEGRAPHS))
{
graphvizStringBuilder.Append(header);
}
// Print all nodes
for (itn.Begin(); !itn.End(); itn.Next())
{
if (fa.GetFinalStates().Count != 0 && fa.GetFinalStates().Contains(itn.M_CurrentItem))
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [peripheries=2];\n");
}
else if (itn.M_CurrentItem == fa.M_Initial)
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\" [style=filled,fillcolor=green];\n");
}
else
{
graphvizStringBuilder.Append("\"" + itn.M_CurrentItem.M_Label + "\";\n");
}
}
// Print all edges of the graph
for (itg.Begin(); !itg.End(); itg.Next())
{
CGraphEdge g = itg.M_CurrentItem;
string source, target;
source = g.M_Source.M_Label;
target = g.M_Target.M_Label;
graphvizStringBuilder.AppendFormat("\"{0}\"" + graphedge_operator + "\"{1}\"",
source, target);
string s = m_FAInfo.Info(g).M_TransitionCharSet?.ToString();
if (s != null)
{
graphvizStringBuilder.AppendFormat(" [style = bold, label = \"" + m_FAInfo.Info(g).M_TransitionCharSet?.ToString() + "\"]");
}
else
{
}
graphvizStringBuilder.Append(";\r\n");
}
// Print footer if necessary
// Print the header if the graph is printed alone independently and not
// in the context for example of a multigraph printing
if (!m_options.IsSet(ThompsonOptions.TO_COMBINEGRAPHS))
{
graphvizStringBuilder.Append("}\r\n");
}
return(graphvizStringBuilder);
}
