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_moo of string
28 exception Version_mismatch of string
30 type ast_command = Cic.obj GrafiteAst.command
31 type moo = ast_command list
33 let marshal_flags = []
36 let rehash_uri uri = UriManager.uri_of_string (UriManager.string_of_uri uri) in
38 | GrafiteAst.Default (loc, name, uris) ->
39 let uris = List.map rehash_uri uris in
40 GrafiteAst.Default (loc, name, uris)
41 | GrafiteAst.Coercion (loc, uri, close) ->
42 GrafiteAst.Coercion (loc, rehash_uri uri, close)
44 prerr_endline "Found a command not expected in a .moo:";
45 let obj_pp _ = assert false in
46 prerr_endline (GrafiteAstPp.pp_command ~obj_pp cmd);
50 * - an integer -- magic number -- denoting the version of the dumped data
51 * structure. Different magic numbers stand for incompatible data structures
52 * - an integer -- checksum -- denoting the hash value (computed with
53 * Hashtbl.hash) of the string representation of the dumped data structur
54 * - marshalled data: list of GrafiteAst.command
57 let save_moo ~fname moo =
58 let ensure_path_exists path =
59 let dir = Filename.dirname path in
62 ensure_path_exists fname;
63 let oc = open_out fname in
64 let marshalled = Marshal.to_string (List.rev moo) marshal_flags in
65 let checksum = Hashtbl.hash marshalled in
66 output_binary_int oc GrafiteAst.magic;
67 output_binary_int oc checksum;
68 output_string oc marshalled;
72 let ic = open_in fname in
74 (fun () -> close_in ic)
77 let moo_magic = input_binary_int ic in
78 if moo_magic <> GrafiteAst.magic then raise (Version_mismatch fname);
79 let moo_checksum = input_binary_int ic in
80 let marshalled = HExtlib.input_all ic in
81 let checksum = Hashtbl.hash marshalled in
82 if checksum <> moo_checksum then raise (Checksum_failure fname);
84 Marshal.from_string marshalled 0
86 List.map rehash_cmd_uris moo
87 with End_of_file -> raise (Corrupt_moo fname))