1 (* Copyright (C) 2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
26 exception Checksum_failure of string
27 exception Corrupt_lexicon of string
28 exception Version_mismatch of string
30 type lexicon = LexiconAst.command list
32 let marshal_flags = []
35 let rehash_uri uri = UriManager.uri_of_string (UriManager.string_of_uri uri) in
37 | LexiconAst.Interpretation (loc, dsc, args, cic_appl_pattern) ->
40 | CicNotationPt.UriPattern uri ->
41 CicNotationPt.UriPattern (rehash_uri uri)
42 | CicNotationPt.ApplPattern args ->
43 CicNotationPt.ApplPattern (List.map aux args)
44 | CicNotationPt.VarPattern _
45 | CicNotationPt.ImplicitPattern as pat -> pat
47 let appl_pattern = aux cic_appl_pattern in
48 LexiconAst.Interpretation (loc, dsc, args, appl_pattern)
49 | LexiconAst.Notation _
50 | LexiconAst.Alias _ as cmd -> cmd
52 prerr_endline "Found a command not expected in a .lexicon:";
53 prerr_endline (LexiconAstPp.pp_command cmd);
56 (** .lexicon file format
57 * - an integer -- magic number -- denoting the version of the dumped data
58 * structure. Different magic numbers stand for incompatible data structures
59 * - an integer -- checksum -- denoting the hash value (computed with
60 * Hashtbl.hash) of the string representation of the dumped data structur
61 * - marshalled data: list of LexiconAst.command
64 let save_lexicon ~fname lexicon =
65 let ensure_path_exists path =
66 let dir = Filename.dirname path in
69 ensure_path_exists fname;
70 let oc = open_out fname in
71 let marshalled = Marshal.to_string (List.rev lexicon) marshal_flags in
72 let checksum = Hashtbl.hash marshalled in
73 output_binary_int oc LexiconAst.magic;
74 output_binary_int oc checksum;
75 output_string oc marshalled;
78 let load_lexicon ~fname =
79 let ic = open_in fname in
81 (fun () -> close_in ic)
84 let lexicon_magic = input_binary_int ic in
85 if lexicon_magic <> LexiconAst.magic then raise (Version_mismatch fname);
86 let lexicon_checksum = input_binary_int ic in
87 let marshalled = HExtlib.input_all ic in
88 let checksum = Hashtbl.hash marshalled in
89 if checksum <> lexicon_checksum then raise (Checksum_failure fname);
90 let (lexicon:lexicon) =
91 Marshal.from_string marshalled 0
93 List.map rehash_cmd_uris lexicon
94 with End_of_file -> raise (Corrupt_lexicon fname))