From afd56af75f0a16ee5b8ab7777871294931ca265c Mon Sep 17 00:00:00 2001
From: Bart Polot <bart@net.in.tum.de>
Date: Tue, 20 Nov 2012 12:01:04 +0000
Subject: - Add whole-tree iterator, for debugging / monitoring / visualization
 purposes.

---
 src/mesh/mesh_tunnel_tree.c | 72 +++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 69 insertions(+), 3 deletions(-)

(limited to 'src/mesh/mesh_tunnel_tree.c')

diff --git a/src/mesh/mesh_tunnel_tree.c b/src/mesh/mesh_tunnel_tree.c
index b57f9410f..21b07616c 100644
--- a/src/mesh/mesh_tunnel_tree.c
+++ b/src/mesh/mesh_tunnel_tree.c
@@ -583,11 +583,11 @@ tree_mark_peers_disconnected (struct MeshTunnelTree *tree,
  *
  * @param tree Tree to use. Must have "me" set.
  * @param cb Callback to call over each child.
- * @param cls Closure.
+ * @param cb_cls Closure for @c cb.
  */
 void
 tree_iterate_children (struct MeshTunnelTree *tree, MeshTreeCallback cb,
-                       void *cls)
+                       void *cb_cls)
 {
   struct MeshTunnelTreeNode *n;
 
@@ -598,7 +598,73 @@ tree_iterate_children (struct MeshTunnelTree *tree, MeshTreeCallback cb,
   }
   for (n = tree->me->children_head; NULL != n; n = n->next)
   {
-    cb (cls, n->peer);
+    cb (cb_cls, n->peer);
+  }
+}
+
+
+/**
+ * Struct to contain a list of pending nodes when iterating a tree.
+ */
+struct MeshTreePendingNode {
+
+  /**
+   * DLL next.
+   */
+  struct MeshTreePendingNode *next;
+
+  /**
+   * DLL prev.
+   */
+  struct MeshTreePendingNode *prev;
+
+  /**
+   * Pending node.
+   */
+  struct MeshTunnelTreeNode *node;
+};
+
+
+/**
+ * Iterate over all nodes in the tree.
+ *
+ * @param tree Tree to use..
+ * @param cb Callback to call over each child.
+ * @param cb_cls Closure for @c cb.
+ *
+ * TODO: recursive implementation? (s/heap/stack/g)
+ */
+void
+tree_iterate_all (struct MeshTunnelTree *tree,
+                  MeshWholeTreeCallback cb,
+                  void *cb_cls)
+{
+  struct MeshTunnelTreeNode *parent;
+  struct MeshTunnelTreeNode *n;
+  struct MeshTreePendingNode *head;
+  struct MeshTreePendingNode *tail;
+  struct MeshTreePendingNode *pending;
+
+  cb (cb_cls, tree->root->peer, 0);
+  pending = GNUNET_malloc (sizeof (struct MeshTreePendingNode));
+  pending->node = tree->root;
+  head = tail = NULL;
+  GNUNET_CONTAINER_DLL_insert (head, tail, pending);
+
+  while (NULL != head)
+  {
+    pending = head;
+    parent = pending->node;
+    GNUNET_CONTAINER_DLL_remove (head, tail, pending);
+    GNUNET_free (pending);
+    for (n = parent->children_head; NULL != n; n = n->next)
+    {
+      cb (cb_cls, n->peer, parent->peer);
+      pending = GNUNET_malloc (sizeof (struct MeshTreePendingNode));
+      pending->node = n;
+      /* Insert_tail: breadth first, Insert: depth first */
+      GNUNET_CONTAINER_DLL_insert (head, tail, pending);
+    }
   }
 }
 
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