1 (******************************************************************************)
2 (* SXSI : XPath evaluator *)
3 (* Kim Nguyen (Kim.Nguyen@nicta.com.au) *)
4 (* Copyright NICTA 2008 *)
5 (* Distributed under the terms of the LGPL (see LICENCE) *)
6 (******************************************************************************)
7 (* maybe utf8 string... *)
13 external null_pool : unit -> pool = "caml_xml_tree_nullt"
14 external null_tag : unit -> t = "caml_xml_tree_nullt"
15 external register_tag : pool -> string -> t = "caml_xml_tree_register_tag"
16 external tag_name : pool -> t -> string = "caml_xml_tree_get_tag_name"
17 external num_tags : pool -> int = "caml_xml_tree_num_tags"
18 let nullt = null_tag ()
20 (* Defined in XMLTree.cpp *)
25 let document_node_close = 4
26 let attribute_close = 5
28 let attribute_data_close= 7
31 let pool = Weak.create 1
33 let init p = Weak.set pool 0 (Some p)
35 let get_pool () = match Weak.get pool 0 with
37 | None -> failwith "Tag.ml: Uninitialized Document"
39 let tag s = match s with
43 | "<@$>" -> attribute_data
44 | _ -> register_tag (get_pool()) s
52 if t == pcdata then "<$>"
53 else if t == attribute_data then "<@$>"
54 else if t == attribute then "<@>"
55 else if t == nullt then "<!NIL!>"
56 else tag_name (get_pool()) t
59 Format.eprintf "Tags are:\n";
60 let doc = get_pool() in
61 let ntags = num_tags doc in
62 for i = 0 to ntags - 1 do
63 Format.eprintf "%i, -><%s/>\n%!" i (to_string i)
68 let print ppf t = Format.fprintf ppf "%s" (to_string t)
69 (* Check internal invariants *)
71 if (t != tag (to_string t))
72 then failwith "module Tag: internal check failed"