Implement set-theoretic operation on 2WSATA (union, intersection,

[tatoo.git] / src / naive_tree.ml

diff --git a/src/naive_tree.ml b/src/naive_tree.ml
index b7c0be6..33c953d 100644 (file)
--- a/src/naive_tree.ml
+++ b/src/naive_tree.ml
@@ -13,10 +13,6 @@
 (*                                                                     *)
 (***********************************************************************)
 
-(*
-  Time-stamp: <Last modified on 2013-04-04 18:47:30 CEST by Kim Nguyen>
-*)
-
 type node = {
   tag : QName.t;
   preorder : int;
@@ -54,6 +50,7 @@ let rec dummy = {
 type t = {
   root : node;
   size : int;
+  by_preorder : node array;
   (* TODO add other intersting stuff *)
 }
 
@@ -208,20 +205,40 @@ struct
        let node = top ctx in
        node.next_sibling <- nil;
        consume_closing ctx node;
-       match ctx.stack with
-         [ root ] ->
-           root.next_sibling <- nil;
-           { root = root;
-             size = ctx.current_preorder
-           }
-       | _ -> raise (Expat.Expat_error Expat.UNCLOSED_TOKEN)
+       Expat.final psr;
+       let root = List.hd ctx.stack in
+       root.next_sibling <- nil;
+       let a = Array.create ctx.current_preorder nil in
+       let rec loop n =
+         if n != nil then
+           begin
+             a.(n.preorder) <- n;
+             loop n.first_child;
+             loop n.next_sibling;
+           end
+       in
+       loop root;
+       { root = root;
+         size = ctx.current_preorder;
+         by_preorder = a
+       }
     )
 
+  let error e parser_ =
+    let msg = Printf.sprintf "%i.%i %s"
+      (Expat.get_current_line_number parser_)
+      (Expat.get_current_column_number parser_)
+      (Expat.xml_error_to_string e)
+    in
+    raise (Tree.Parse_error msg)
 
   let parse_string s =
     let parser_, finalize = create_parser () in
-    Expat.parse parser_ s;
-    finalize ()
+    try
+      Expat.parse parser_ s;
+      finalize ()
+    with
+      Expat.Expat_error e -> error e parser_
 
   let parse_file fd =
     let buffer = String.create 4096 in
@@ -231,7 +248,10 @@ struct
       if read != 0 then
         let () = Expat.parse_sub parser_ buffer 0 read in
         loop ()
-    in loop (); finalize ()
+    in try
+         loop (); finalize ()
+      with
+        Expat.Expat_error e -> error e parser_
 
 end
 
@@ -309,5 +329,7 @@ let tag _ n = n.tag
 let data _ n = n.data
 let kind _ n = n.kind
 let preorder _ n = n.preorder
-
+let by_preorder t i =
+ if i >= 0 && i < t.size then Array.unsafe_get t.by_preorder i
+ else let e = Invalid_argument "by_preorder" in raise e
 let print_node fmt n = Parser.debug_node fmt n