private void AddPrefix(Suffix active, int indexOfLastCharacter)
{
int parentNode;
int lastParentNode = -1;
for (;;)
{
Edge edge;
parentNode = active.originNode;
if (active.IsExplicit)
{
edge = Edge.Find(theString, Edges, active.originNode, theString[indexOfLastCharacter]);
if (edge.startNode != -1)
{
break;
}
}
else
{
edge = Edge.Find(theString, Edges, active.originNode, theString[active.indexOfFirstCharacter]);
int span = active.indexOfLastCharacter - active.indexOfFirstCharacter;
if (theString[edge.indexOfFirstCharacter + span + 1] == theString[indexOfLastCharacter])
{
break;
}
parentNode = edge.SplitEdge(active, theString, Edges, Nodes);
}
Edge newEdge = new Edge(theString, indexOfLastCharacter, theString.Count, parentNode);
newEdge.Insert(theString, Edges, Nodes);
if (lastParentNode > 0)
{
Nodes[lastParentNode].suffixNode = parentNode;
}
lastParentNode = parentNode;
if (active.originNode == 0)
{
active.indexOfFirstCharacter++;
}
else
{
active.originNode = Nodes[active.originNode].suffixNode;
}
active.Canonize(theString, Edges);
}
if (lastParentNode > 0)
{
Nodes[lastParentNode].suffixNode = parentNode;
}
active.indexOfLastCharacter++;
active.Canonize(theString, Edges);
}
