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.
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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_moo of string
28 exception Version_mismatch of string
30 let marshal_flags = []
33 * - an integer -- magic number -- denoting the version of the dumped data
34 * structure. Different magic numbers stand for incompatible data structures
35 * - an integer -- checksum -- denoting the hash value (computed with
36 * Hashtbl.hash) of the string representation of the dumped data structur
37 * - marshalled list of GrafiteAst.command
40 let save_moo ~fname moo =
41 let oc = open_out fname in
42 let marshalled_moo = Marshal.to_string (List.rev moo) marshal_flags in
43 let checksum = Hashtbl.hash marshalled_moo in
44 output_binary_int oc GrafiteAst.magic;
45 output_binary_int oc checksum;
46 output_string oc marshalled_moo;
50 let ic = open_in fname in
52 (fun () -> close_in ic)
55 let moo_magic = input_binary_int ic in
56 if moo_magic <> GrafiteAst.magic then raise (Version_mismatch fname);
57 let moo_checksum = input_binary_int ic in
58 let marshalled_moo = HExtlib.input_all ic in
59 let checksum = Hashtbl.hash marshalled_moo in
60 if checksum <> moo_checksum then raise (Checksum_failure fname);
61 let (moo: MatitaTypes.ast_command list) =
62 Marshal.from_string marshalled_moo 0
65 with End_of_file -> raise (Corrupt_moo fname))