+++ /dev/null
-(* Copyright (C) 2000, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://www.cs.unibo.it/helm/.
- *)
-
-(* AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
- *)
-
-module T = HxpTypes
-
-module type Type = sig
-
- type handle
-
- val start : string -> bool -> handle
-
- val stop : handle -> unit
-
- val next : handle -> T.xml_object
-
- val xnext : handle -> handle * T.xml_xobject
-
- val scan_for : handle -> T.xml_xobject -> handle
-
-end
-
-module Make : Type = struct
-
- module L = HxpLexer
-
- module P = HxpParser
-
- type mode_t = Text of in_channel * Lexing.lexbuf
- | GZip of Gzip.in_channel * Lexing.lexbuf
-
- type handle = {mode : mode_t; level : int}
-
- let start s filter =
- let gread gch s n = Gzip.input gch s 0 n in
- if filter then
- let gch = Gzip.open_in (s ^ ".gz") in
- let glb = Lexing.from_function (gread gch) in
- {mode = GZip (gch, glb); level = 0}
- else
- let ch = open_in s in
- let lb = Lexing.from_channel ch in
- {mode = Text (ch, lb); level = 0}
-
- let stop = function
- | {mode = GZip (gch, _)} -> Gzip.close_in gch
- | {mode = Text (ch, _)} -> close_in ch
-
- let next h =
- let lexbuf = match h.mode with
- | GZip (_, glb) -> glb
- | Text (_, lb) -> lb
- in
- P.xml L.xml_token lexbuf
-
- let xnext h =
- let obj = next h in
- match obj with
- | T.XML_Open _ -> {h with level = succ h.level}, (obj, h.level)
- | T.XML_Close _ -> {h with level = pred h.level}, (obj, pred h.level)
- | _ -> h, (obj, h.level)
-
- let rec scan_for h xobj =
- let h, curr_xobj = xnext h in
- if curr_xobj = xobj then h else scan_for h xobj
-
-end