//Accepts the dependencies and generates a graph
public List<CsNode<string, string>> graphAccept(List<Tuple<string,string>> graph, List<string> files)
{
List<CsNode<string, string>> nodes = new List<CsNode<string, string>>();
for(int i=0;i<files.Count;i++)
{
CsNode<string, string> node = new CsNode<string, string>(files[i]);
node.name = Path.GetFileName(files[i]);
nodes.Add(node);
}
int n = graph.Count;
for(int i=0;i<n;i++)
{
int j = 0;
for(j=0;j<nodes.Count;j++)
{
if (nodes[j].name == graph[i].Item1)
break;
}
for(int k=0;k<nodes.Count;k++)
{
if (nodes[k].name == graph[i].Item2 && j != nodes.Count)
nodes[j].addChild(nodes[k], " ");
}
}
return nodes;
}
//----< depth first search from specific node >------------------------
public void walk(CsNode<V, E> node)
{
// process this node
gop.doNodeOp(node);
node.visited = true;
// visit children
do
{
CsEdge<V, E> childEdge = node.getNextUnmarkedChild();
if (childEdge == null)
{
return;
}
else
{
gop.doEdgeOp(childEdge.edgeValue);
walk(childEdge.targetNode);
if (node.hasUnmarkedChild() || showBackTrack)
{ // popped back to predecessor node
gop.doNodeOp(node); // more edges to visit so announce
} // location and next edge
}
} while (true);
}
//determines the strongly connectedcomponents present
public List<string> Tarjan(List<CsNode<string, string>> m)
{
var index = 0;
string sccComponents = null;
List<string> sccNames = new List<string>();
var S = new Stack<CsNode<string, string>>();
void StrongConnect(CsNode<string, string> v)
{
v.Index = index;
v.LowLink = index;
index++;
S.Push(v);
CsNode<string, string> w = null;
for (int i = 0; i < v.children.Count; i++)
{
w = v.children[i].targetNode;
if (w.Index < 0)
{
StrongConnect(w);
v.LowLink = Math.Min(v.LowLink, w.LowLink);
}
else if (S.Contains(w))
v.LowLink = Math.Min(v.LowLink, w.Index);
}
if (v.LowLink == v.Index)
{
do
{
w = S.Pop();
sccComponents += w.name + ",";
} while (w != v);
sccNames.Add(sccComponents);
sccComponents = null;
}
}
foreach (var v in m)
if (v.Index < 0)
StrongConnect(v);
return sccNames;
}
static void Main(string[] args)
{
Console.Write("\nDemonstating Test Stub for Strongly Connected Component");
Console.Write("\n =======================\n");
CsNode<string, string> node1 = new CsNode<string, string>("node1");
CsNode<string, string> node2 = new CsNode<string, string>("node2");
CsNode<string, string> node3 = new CsNode<string, string>("node3");
CsNode<string, string> node4 = new CsNode<string, string>("node4");
CsNode<string, string> node5 = new CsNode<string, string>("node5");
List<CsNode<string, string>> nodes = new List<CsNode<string, string>>();
node1.addChild(node2, "edge12");
node1.addChild(node3, "edge13");
node2.addChild(node3, "edge23");
node2.addChild(node4, "edge24");
node3.addChild(node1, "edge31");
node5.addChild(node1, "edge51");
node5.addChild(node4, "edge54");
CsGraph<string, string> graph = new CsGraph<string, string>("Fred");
graph.addNode(node1);
graph.addNode(node2);
graph.addNode(node3);
graph.addNode(node4);
graph.addNode(node5);
nodes.Add(node1);
nodes.Add(node2);
nodes.Add(node3);
nodes.Add(node4);
nodes.Add(node5);
StronglyConnectedComponent T = new StronglyConnectedComponent();
List<string> scc=T.Tarjan(nodes);
for (int i = 0; i < scc.Count; i++)
Console.WriteLine("{0}:{1}", i + 1, scc[i]);
Console.Read();
}
override public bool doNodeOp(CsNode<string, string> node)
{
Console.Write("\n -- {0}", node.name);
return true;
}
//----< add vertex to graph adjacency list >---------------------------
public void addNode(CsNode<V, E> node)
{
adjList.Add(node);
}
//----< graph.walk() calls this on every node >------------------------
virtual public bool doNodeOp(CsNode<V, E> node)
{
Console.Write("\n {0}", node.ToString());
return true;
}
//----< add child vertex and its associated edge value to vertex >-----
public void addChild(CsNode<V, E> childNode, E edgeVal)
{
children.Add(new CsEdge<V, E>(childNode, edgeVal));
}
public CsEdge(CsNode<V, E> node, E value)
{
targetNode = node;
edgeValue = value;
}