1 files changed, 39 insertions, 0 deletions
diff --git a/filter/tree.c b/filter/tree.c
index f6ab75b4..ee9f448a 100644
--- a/filter/tree.c
+++ b/filter/tree.c
@@ -53,6 +53,11 @@ build_tree_rec(struct f_tree **buf, int l, int h)
   return n;
 }
 
+static int 
+tree_compare(const void *p1, const void *p2)
+{
+  return val_compare((* (struct f_tree **) p1)->from, (* (struct f_tree **) p2)->from);
+}
 
 /**
  * build_tree
@@ -132,3 +137,37 @@ same_tree(struct f_tree *t1, struct f_tree *t2)
     return 0;
   return 1;
 }
+
+
+static void
+tree_node_format(struct f_tree *t, buffer *buf)
+{
+  if (t == NULL)
+    return;
+
+  tree_node_format(t->left, buf);
+
+  val_format(t->from, buf);
+  if (val_compare(t->from, t->to) != 0)
+  {
+    buffer_puts(buf, "..");
+    val_format(t->to, buf);
+  }
+  buffer_puts(buf, ", ");
+
+  tree_node_format(t->right, buf);
+}
+
+void
+tree_format(struct f_tree *t, buffer *buf)
+{
+  buffer_puts(buf, "[");
+ 
+ tree_node_format(t, buf);
+
+ /* Undo last separator */
+  if (buf->pos[-1] != '[')
+    buf->pos -= 2;
+ 
+  buffer_puts(buf, "]");
+}