1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
(**************************************************************************)
(* Copyright © 2009-2014 Stéphane Glondu <steph@glondu.net> *)
(* © 2010-2014 Mehdi Dogguy <mehdi@dogguy.org> *)
(* *)
(* This program is free software: you can redistribute it and/or modify *)
(* it under the terms of the GNU Affero General Public License as *)
(* published by the Free Software Foundation, either version 3 of the *)
(* License, or (at your option) any later version, with the additional *)
(* exemption that compiling, linking, and/or using OpenSSL is allowed. *)
(* *)
(* This program 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 *)
(* Affero General Public License for more details. *)
(* *)
(* You should have received a copy of the GNU Affero General Public *)
(* License along with this program. If not, see *)
(* <http://www.gnu.org/licenses/>. *)
(**************************************************************************)
open Error
type t = Gzip | Bz2 | Xz | Plain
let to_string = function
| Gzip -> "Gzip"
| Bz2 -> "Bz2"
| Xz -> "Xz"
| Plain -> "Plain"
let of_string s =
match String.lowercase_ascii s with
| "gzip" | "gz" -> Gzip
| "bz2" -> Bz2
| "xz" -> Xz
| "plain" | "no" | "none" -> Plain
| _ -> raise (Unknown_input_format s)
let default = Xz
let is_known s =
try
ignore (of_string s);
true
with _ -> false
let is_compressed s = try of_string s <> Plain with _ -> false
let file_is_compressed filename =
try is_compressed (FilePath.get_extension filename) with _ -> false
let extension = function
| Gzip -> ".gz"
| Bz2 -> ".bz2"
| Xz -> ".xz"
| Plain -> ""
let display_tool = function
| Gzip -> "zcat"
| Bz2 -> "bzcat"
| Xz -> "xzcat"
| Plain -> "cat"
|
