public PointsToGraph Clone()
{
var ptg = new PointsToGraph();
ptg.Union(this);
return(ptg);
}
public void Union(PointsToGraph ptg)
{
// add all new nodes
foreach (var node in ptg.Nodes)
{
if (this.Contains(node))
{
continue;
}
var clone = new PTGNode(node.Id, node.Type, node.Offset, node.Kind);
nodes.Add(clone.Id, clone);
}
// add all variables
foreach (var variable in ptg.Variables)
{
this.variables.Add(variable);
}
// add all edges
foreach (var node in ptg.Nodes)
{
var clone = nodes[node.Id];
// add variable <---> node edges
foreach (var variable in node.Variables)
{
clone.Variables.Add(variable);
this.variables.Add(variable, clone);
}
// add source -field-> node edges
foreach (var entry in node.Sources)
{
foreach (var source in entry.Value)
{
var source_clone = nodes[source.Id];
clone.Sources.Add(entry.Key, source_clone);
}
}
// add node -field-> target edges
foreach (var entry in node.Targets)
{
foreach (var target in entry.Value)
{
var target_clone = nodes[target.Id];
clone.Targets.Add(entry.Key, target_clone);
}
}
}
}