Bump file format magic number, invalidate all previously generated indexes.

diff --git a/src/tree.ml b/src/tree.ml
index ec253bc..e729034 100644 (file)
--- a/src/tree.ml
+++ b/src/tree.ml
@@ -572,7 +572,7 @@ let parse_xml_string str = node_of_t (TreeBuilder.parse_string str)
 let size t = tree_size t.doc;;
 
 let magic_string = "SXSI_INDEX"
-let version_string = "3"
+let version_string = "4"
 
 let pos fd =
   Unix.lseek fd 0  Unix.SEEK_CUR
@@ -785,7 +785,7 @@ let stats tree =
     in
     traverse tree.doc root [] 0;
     let sumdepth = Hashtbl.fold (fun p c acc -> (List.length p) * c + acc) h 0 in
-    
+    let alltags = Ptset.Int.union tree.elements tree.attributes in
     Logger.print err_formatter "Statistics :@\n\
 Average depth: %f@\n\
 Longest path: %i@\n\
@@ -793,14 +793,16 @@ Number of distinct paths: %i@\n\
 Number of nodes: %i@\n\
 Number of leaves: %i@\n\
 Number of pcdata/cdata nodes: %i@\n\
-Number of distinct tags: %i@\n@?"
+Number of distinct tags: %i@\n\
+Largest tag id: %i@\n@?"
       (float_of_int sumdepth /. float_of_int !numleaves)
       !depth
       (Hashtbl.length h)
       (tree_subtree_size tree.doc root)
       !numleaves
       !numtexts
-      (Ptset.Int.cardinal (Ptset.Int.union tree.elements tree.attributes))
+      (Ptset.Int.cardinal alltags)
+      (Ptset.Int.max_elt alltags)
 
 (*
   Logger.print err_formatter "Average depth: %f, number of leaves %i@\n@?" ((float_of_int a)/. (float_of_int b)) b