--- trunk/mdtools/interface_implementation/MakeStamps.cpp	2002/12/05 18:53:40	195
+++ trunk/mdtools/interface_implementation/MakeStamps.cpp	2002/12/05 21:37:51	196
@@ -13,15 +13,42 @@ LinkedMolStamp::~LinkedMolStamp(){ 
   if( next != NULL ) delete next; 
 }
 
+void LinkedMolStamp::add( LinkedMolStamp* newbie ){
+  
+  if( next != NULL ) next->add( newbie );
+  else{
+    next = newbie;
+    next->setPrev( this );
+  }
+}
+
 MoleculeStamp* LinkedMolStamp::match( char* id ){
 
   if( mol_stamp != NULL ){
-    
-    if(!strcmp( mol_stamp->getID(), id )) return mol_stamp;
-    
-    if( next != NULL ) return next->match( id );
+    if(!strcmp( mol_stamp->getID(), id )){
+      
+      // make sure we aren't hiding somebody else with the same name
+      if(next != NULL ){
+	if( next->match( id ) != NULL){
+	  sprintf( painCave.errMsg,
+		   "Molecule Stamp Error. Two separate of declarations of %s present.\n",
+		   id );
+	  painCave.isFatal = 1;
+	  simError();
+#ifdef IS_MPI
+	  if( painCave.isEventLoop ){
+	    if( worldRank == 0 ) mpiInterfaceExit();
+	  }
+#endif //is_mpi
+	}
+	else return mol_stamp;
+      }
+      else  return mol_stamp;
+    }
   }
   
+  if( next != NULL ) return next->match( id );
+  
   return NULL;
 }
 
@@ -31,7 +58,7 @@ MakeStamps::MakeStamps(){
   
   my_mols = new LinkedMolStamp*[hash_size];
   for( i=0; i<hash_size; i++ ){
-    my_mols[i] = NULL;
+    my_mols[i] = new LinkedMolStamp();
   }
 
 }
@@ -96,9 +123,9 @@ void MakeStamps::addMolStamp( MoleculeStamp* the_stamp
 
   linked_mol = new LinkedMolStamp;
   linked_mol->setStamp( the_stamp );
-  linked_mol->setNext( my_mols[key] );
 
-  my_mols[key] = linked_mol;
+  my_mols[key]->add( linked_mol );
+
 }