cyclegraph: return 'added' status for addEdge()
[c11tester.git] / cyclegraph.cc
index 3bb5ab8..eaddc8e 100644 (file)
@@ -168,13 +168,16 @@ bool CycleGraph::mergeNodes(CycleNode *w_node, CycleNode *p_node,
  * Adds an edge between two CycleNodes.
  * @param fromnode The edge comes from this CycleNode
  * @param tonode The edge points to this CycleNode
+ * @return True, if new edge(s) are added; otherwise false
  */
-void CycleGraph::addNodeEdge(CycleNode *fromnode, CycleNode *tonode)
+bool CycleGraph::addNodeEdge(CycleNode *fromnode, CycleNode *tonode)
 {
+       bool added;
+
        if (!hasCycles)
                hasCycles = checkReachable(tonode, fromnode);
 
-       if (fromnode->addEdge(tonode))
+       if ((added = fromnode->addEdge(tonode)))
                rollbackvector.push_back(fromnode);
 
        /*
@@ -186,9 +189,12 @@ void CycleGraph::addNodeEdge(CycleNode *fromnode, CycleNode *tonode)
                if (!hasCycles)
                        hasCycles = checkReachable(tonode, rmwnode);
 
-               if (rmwnode->addEdge(tonode))
+               if (rmwnode->addEdge(tonode)) {
                        rollbackvector.push_back(rmwnode);
+                       added = true;
+               }
        }
+       return added;
 }
 
 /**