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_tag_name"
18 let nullt = null_tag ()
19 (* Defined in XMLTree.cpp *)
23 let pool = Weak.create 1
25 let init p = Weak.set pool 0 (Some p)
27 let get_pool () = match Weak.get pool 0 with
29 | None -> failwith "Tag.ml: Uninitialized Document"
31 let tag s = match s with
34 | _ -> register_tag (get_pool()) s
43 if t = pcdata then "<$>"
44 else if t = attribute then "<@>"
45 else tag_name (get_pool()) t
48 let print ppf t = Format.fprintf ppf "%s" (to_string t)
49 (* Check internal invariants *)
51 if (t != tag (to_string t))
52 then failwith "module Tag: internal check failed"