Store a pointer to the real parent in reparent dirs.

src/ecma119_tree.c

@@ -651,6 +651,9 @@ int reparent(Ecma119Node *child, Ecma119Node *parent)
         return ISO_ERROR;
     }
 
+    /* keep track of the real parent */
+    child->info.dir.real_parent = child->parent;
+    
     /* add the child to its new parent */
     child->parent = parent;
     parent->info.dir.nchildren++;

src/ecma119_tree.h

@@ -29,6 +29,11 @@ struct ecma119_dir_info {
 
     size_t nchildren;
     Ecma119Node **children;
+    
+    /** 
+     * Real parent if the dir has been reallocated. NULL otherwise.
+     */
+    Ecma119Node *real_parent;
 };
 
 /**
@@ -51,6 +56,8 @@ struct ecma119_node
     enum ecma119_node_type type; 
     union {
         IsoFileSrc *file;
+        // TODO this wastes too much memory, as dirs have much more
+        // atts than other kind of files. Replace with a pointer.
         struct ecma119_dir_info dir;
         /** this field points to the relocated directory. */
         Ecma119Node *real_me;