public virtual void ReplaceStatement(Statement oldstat, Statement newstat)
{
foreach (StatEdge edge in oldstat.GetAllPredecessorEdges())
{
oldstat.RemovePredecessor(edge);
edge.GetSource().ChangeEdgeNode(Direction_Forward, edge, newstat);
newstat.AddPredecessor(edge);
}
foreach (StatEdge edge in oldstat.GetAllSuccessorEdges())
{
oldstat.RemoveSuccessor(edge);
edge.SetSource(newstat);
newstat.AddSuccessor(edge);
}
int statindex = stats.GetIndexByKey(oldstat.id);
stats.RemoveWithKey(oldstat.id);
stats.AddWithKeyAndIndex(statindex, newstat, newstat.id);
newstat.SetParent(this);
newstat.post = oldstat.post;
if (first == oldstat)
{
first = newstat;
}
List <StatEdge> lst = new List <StatEdge>(oldstat.GetLabelEdges());
for (int i = lst.Count - 1; i >= 0; i--)
{
StatEdge edge = lst[i];
if (edge.GetSource() != newstat)
{
newstat.AddLabeledEdge(edge);
}
else if (this == edge.GetDestination() || this.ContainsStatementStrict(edge.GetDestination
()))
{
edge.closure = null;
}
else
{
this.AddLabeledEdge(edge);
}
}
oldstat.GetLabelEdges().Clear();
}
public virtual void CollapseNodesToStatement(Statement stat)
{
Statement head = stat.GetFirst();
Statement post = stat.GetPost();
VBStyleCollection <Statement, int> setNodes = stat.GetStats();
// post edges
if (post != null)
{
foreach (StatEdge edge in post.GetEdges(Statedge_Direct_All, Direction_Backward))
{
if (stat.ContainsStatementStrict(edge.GetSource()))
{
edge.GetSource().ChangeEdgeType(Direction_Forward, edge, StatEdge.Type_Break);
stat.AddLabeledEdge(edge);
}
}
}
// regular head edges
foreach (StatEdge prededge in head.GetAllPredecessorEdges())
{
if (prededge.GetType() != StatEdge.Type_Exception && stat.ContainsStatementStrict
(prededge.GetSource()))
{
prededge.GetSource().ChangeEdgeType(Direction_Forward, prededge, StatEdge.Type_Continue
);
stat.AddLabeledEdge(prededge);
}
head.RemovePredecessor(prededge);
prededge.GetSource().ChangeEdgeNode(Direction_Forward, prededge, stat);
stat.AddPredecessor(prededge);
}
if (setNodes.ContainsKey(first.id))
{
first = stat;
}
// exception edges
HashSet <Statement> setHandlers = new HashSet <Statement>(head.GetNeighbours(StatEdge
.Type_Exception, Direction_Forward));
foreach (Statement node in setNodes)
{
setHandlers.UnionWith(node.GetNeighbours(StatEdge.Type_Exception, Direction_Forward
));
}
if (!(setHandlers.Count == 0))
{
foreach (StatEdge edge in head.GetEdges(StatEdge.Type_Exception, Direction_Forward
))
{
Statement handler = edge.GetDestination();
if (setHandlers.Contains(handler))
{
if (!setNodes.ContainsKey(handler.id))
{
stat.AddSuccessor(new StatEdge(stat, handler, edge.GetExceptions()));
}
}
}
foreach (Statement node in setNodes)
{
foreach (StatEdge edge in node.GetEdges(StatEdge.Type_Exception, Direction_Forward
))
{
if (setHandlers.Contains(edge.GetDestination()))
{
node.RemoveSuccessor(edge);
}
}
}
}
if (post != null && !stat.GetNeighbours(StatEdge.Type_Exception, Direction_Forward
).Contains(post))
{
// TODO: second condition redundant?
stat.AddSuccessor(new StatEdge(StatEdge.Type_Regular, stat, post));
}
// adjust statement collection
foreach (Statement st in setNodes)
{
stats.RemoveWithKey(st.id);
}
stats.AddWithKey(stat, stat.id);
stat.SetAllParent();
stat.SetParent(this);
stat.BuildContinueSet();
// monitorenter and monitorexit
stat.BuildMonitorFlags();
if (stat.type == Type_Switch)
{
// special case switch, sorting leaf nodes
((SwitchStatement)stat).SortEdgesAndNodes();
}
}