Cell::flattenNets() checks for already flattened top nets.

* Change: In Hurricane, in Cell::flattenNets(), do not flatten a *top net*
    if at least one RoutingPad is present. In that case, we assumes that
    the net has already been completly flattened.
* New: In Hurricane, in Entity, add an accessor to unique id counter.

hurricane/src/hurricane/Cell.cpp

@@ -212,6 +212,19 @@ void Cell::flattenNets(unsigned int flags)
         buildRing = flags & Cell::BuildRings;
       }
 
+      bool hasRoutingPads = false;
+      forEach ( Component*, icomponent, net->getComponents() ) {
+        RoutingPad* rp = dynamic_cast<RoutingPad*>( *icomponent );
+        if (rp) {
+        // At least one RoutingPad is present: assumes that the net is already
+        // flattened (completly).
+        //cerr << net << " has already RoutingPads, skipped " << rp << endl; 
+          hasRoutingPads = true;
+          break;
+        }
+      }
+      if (hasRoutingPads) continue;
+
       forEach ( Component*, icomponent, net->getComponents() ) {
         Plug* primaryPlug = dynamic_cast<Plug*>( *icomponent );
         if (primaryPlug) {

hurricane/src/hurricane/Entity.cpp

@@ -37,6 +37,10 @@ namespace Hurricane {
   unsigned int  Entity::_idCounter = 0;
 
 
+  unsigned int  Entity::getIdCounter ()
+  { return _idCounter; }
+
+
   Entity::Entity()
     : Inherit()
     , _id(_idCounter++)

hurricane/src/hurricane/hurricane/Entity.h

@@ -40,6 +40,8 @@ namespace Hurricane {
   {
     public:
       typedef DBo Inherit;
+    public:
+      static  unsigned int  getIdCounter  ();
     public:
       inline  unsigned int  getId         () const;
       virtual Cell*         getCell       () const = 0;