TestGetVertexIDPair6()
{
// Undirected graph, useDirectedness = false.
IGraph oUndirectedGraph = new Graph(GraphDirectedness.Undirected);
IVertexCollection oUndirectedVertices = oUndirectedGraph.Vertices;
IVertex oUndirectedVertexA = oUndirectedVertices.Add();
IVertex oUndirectedVertexB = oUndirectedVertices.Add();
IVertex oUndirectedVertexC = oUndirectedVertices.Add();
IVertex oUndirectedVertexD = oUndirectedVertices.Add();
IEdgeCollection oEdges = oUndirectedGraph.Edges;
IEdge oEdge1 = oEdges.Add(oUndirectedVertexA, oUndirectedVertexB,
false);
IEdge oEdge2 = oEdges.Add(oUndirectedVertexA, oUndirectedVertexB,
false);
IEdge oEdge3 = oEdges.Add(oUndirectedVertexB, oUndirectedVertexA,
false);
IEdge oEdge4 = oEdges.Add(oUndirectedVertexA, oUndirectedVertexC,
false);
Int64 i64VertexIDPair1 = EdgeUtil.GetVertexIDPair(oEdge1, false);
Int64 i64VertexIDPair2 = EdgeUtil.GetVertexIDPair(oEdge2, false);
Int64 i64VertexIDPair3 = EdgeUtil.GetVertexIDPair(oEdge3, false);
Int64 i64VertexIDPair4 = EdgeUtil.GetVertexIDPair(oEdge4, false);
// Make sure that the left-shift worked.
Assert.IsTrue(i64VertexIDPair1 > Int32.MaxValue);
Assert.IsTrue(i64VertexIDPair2 > Int32.MaxValue);
Assert.IsTrue(i64VertexIDPair3 > Int32.MaxValue);
Assert.IsTrue(i64VertexIDPair4 > Int32.MaxValue);
Assert.AreEqual(i64VertexIDPair1, i64VertexIDPair2);
Assert.AreEqual(i64VertexIDPair1, i64VertexIDPair3);
Assert.AreNotEqual(i64VertexIDPair1, i64VertexIDPair4);
Assert.AreEqual(i64VertexIDPair2, i64VertexIDPair3);
Assert.AreNotEqual(i64VertexIDPair2, i64VertexIDPair4);
Assert.AreNotEqual(i64VertexIDPair3, i64VertexIDPair4);
}
TestGetVertexIDPair()
{
// Directed graph.
IGraph oDirectedGraph = new Graph(GraphDirectedness.Directed);
IVertexCollection oDirectedVertices = oDirectedGraph.Vertices;
IVertex oDirectedVertexA = oDirectedVertices.Add();
IVertex oDirectedVertexB = oDirectedVertices.Add();
IVertex oDirectedVertexC = oDirectedVertices.Add();
IVertex oDirectedVertexD = oDirectedVertices.Add();
IEdgeCollection oEdges = oDirectedGraph.Edges;
IEdge oEdge1 = oEdges.Add(oDirectedVertexA, oDirectedVertexB, true);
IEdge oEdge2 = oEdges.Add(oDirectedVertexA, oDirectedVertexB, true);
IEdge oEdge3 = oEdges.Add(oDirectedVertexB, oDirectedVertexA, true);
IEdge oEdge4 = oEdges.Add(oDirectedVertexA, oDirectedVertexC, true);
Int64 i64VertexIDPair1 = EdgeUtil.GetVertexIDPair(oEdge1);
Int64 i64VertexIDPair2 = EdgeUtil.GetVertexIDPair(oEdge2);
Int64 i64VertexIDPair3 = EdgeUtil.GetVertexIDPair(oEdge3);
Int64 i64VertexIDPair4 = EdgeUtil.GetVertexIDPair(oEdge4);
// Make sure that the left-shift worked.
Assert.IsTrue(i64VertexIDPair1 > Int32.MaxValue);
Assert.IsTrue(i64VertexIDPair2 > Int32.MaxValue);
Assert.IsTrue(i64VertexIDPair3 > Int32.MaxValue);
Assert.IsTrue(i64VertexIDPair4 > Int32.MaxValue);
Assert.AreEqual(i64VertexIDPair1, i64VertexIDPair2);
Assert.AreNotEqual(i64VertexIDPair1, i64VertexIDPair3);
Assert.AreNotEqual(i64VertexIDPair1, i64VertexIDPair4);
Assert.AreNotEqual(i64VertexIDPair2, i64VertexIDPair3);
Assert.AreNotEqual(i64VertexIDPair2, i64VertexIDPair4);
Assert.AreNotEqual(i64VertexIDPair3, i64VertexIDPair4);
}
CountEdges()
{
AssertValid();
if (m_bEdgesCounted)
{
return;
}
m_iUniqueEdges = 0;
m_iEdgesWithDuplicates = 0;
IEdgeCollection oEdges = m_oGraph.Edges;
Boolean bGraphIsDirected =
(m_oGraph.Directedness == GraphDirectedness.Directed);
// Create a dictionary of vertex ID pairs. The key is the vertex ID
// pair and the value is true if the edge has duplicates or false if it
// doesn't.
Dictionary <Int64, Boolean> oVertexIDPairs =
new Dictionary <Int64, Boolean>(oEdges.Count);
foreach (IEdge oEdge in oEdges)
{
Int64 i64VertexIDPair = EdgeUtil.GetVertexIDPair(oEdge);
Boolean bEdgeHasDuplicate;
if (oVertexIDPairs.TryGetValue(i64VertexIDPair,
out bEdgeHasDuplicate))
{
if (!bEdgeHasDuplicate)
{
// This is the edge's first duplicate.
m_iUniqueEdges--;
m_iEdgesWithDuplicates++;
oVertexIDPairs[i64VertexIDPair] = true;
}
m_iEdgesWithDuplicates++;
}
else
{
m_iUniqueEdges++;
oVertexIDPairs.Add(i64VertexIDPair, false);
}
}
m_iTotalEdgesAfterMergingDuplicatesNoSelfLoops = 0;
foreach (Int64 i64VertexIDPair in oVertexIDPairs.Keys)
{
Int32 iVertexID1 = (Int32)(i64VertexIDPair >> 32);
Int32 iVertexID2 = (Int32)i64VertexIDPair;
if (iVertexID1 != iVertexID2)
{
m_iTotalEdgesAfterMergingDuplicatesNoSelfLoops++;
}
}
m_bEdgesCounted = true;
AssertValid();
}