archive_read_support_format_all.c revision 342360 
1/*-
2 * Copyright (c) 2003-2011 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "archive_platform.h"
27__FBSDID("$FreeBSD: stable/11/contrib/libarchive/libarchive/archive_read_support_format_all.c 342360 2018-12-21 23:33:05Z mm $");
28
29#include "archive.h"
30#include "archive_private.h"
31
32int
33archive_read_support_format_all(struct archive *a)
34{
35	archive_check_magic(a, ARCHIVE_READ_MAGIC,
36	    ARCHIVE_STATE_NEW, "archive_read_support_format_all");
37
38	/* TODO: It would be nice to compute the ordering
39	 * here automatically so that people who enable just
40	 * a few formats can still get the benefits.  That
41	 * may just require the format registration to include
42	 * a "maximum read-ahead" value (anything that uses seek
43	 * would be essentially infinite read-ahead).  The core
44	 * bid management can then sort the bidders before calling
45	 * them.
46	 *
47	 * If you implement the above, please return the list below
48	 * to alphabetic order.
49	 */
50
51	/*
52	 * These bidders are all pretty cheap; they just examine a
53	 * small initial part of the archive.  If one of these bids
54	 * high, we can maybe avoid running any of the more expensive
55	 * bidders below.
56	 */
57	archive_read_support_format_ar(a);
58	archive_read_support_format_cpio(a);
59	archive_read_support_format_empty(a);
60	archive_read_support_format_lha(a);
61	archive_read_support_format_mtree(a);
62	archive_read_support_format_tar(a);
63	archive_read_support_format_xar(a);
64	archive_read_support_format_warc(a);
65
66	/*
67	 * Install expensive bidders last.  By doing them last, we
68	 * increase the chance that a high bid from someone else will
69	 * make it unnecessary for these to do anything at all.
70	 */
71	/* These three have potentially large look-ahead. */
72	archive_read_support_format_7zip(a);
73	archive_read_support_format_cab(a);
74	archive_read_support_format_rar(a);
75	archive_read_support_format_rar5(a);
76	archive_read_support_format_iso9660(a);
77	/* Seek is really bad, since it forces the read-ahead
78	 * logic to discard buffered data. */
79	archive_read_support_format_zip(a);
80
81	/* Note: We always return ARCHIVE_OK here, even if some of the
82	 * above return ARCHIVE_WARN.  The intent here is to enable
83	 * "as much as possible."  Clients who need specific
84	 * compression should enable those individually so they can
85	 * verify the level of support. */
86	/* Clear any warning messages set by the above functions. */
87	archive_clear_error(a);
88	return (ARCHIVE_OK);
89}
90