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: head/lib/libarchive/archive_read_support_format_all.c 174991 2007-12-30 04:58:22Z kientzle $"); 28 29 #include "archive.h" 30 #include "archive_private.h" 31 32 int 33 archive_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 65 /* 66 * Install expensive bidders last. By doing them last, we 67 * increase the chance that a high bid from someone else will 68 * make it unnecessary for these to do anything at all. 69 */ 70 /* These three have potentially large look-ahead. */ 71 archive_read_support_format_7zip(a); 72 archive_read_support_format_cab(a); 73 archive_read_support_format_rar(a); 74 archive_read_support_format_iso9660(a); 75 /* Seek is really bad, since it forces the read-ahead 76 * logic to discard buffered data. */ 77 archive_read_support_format_zip(a); 78 79 /* Note: We always return ARCHIVE_OK here, even if some of the 80 * above return ARCHIVE_WARN. The intent here is to enable 81 * "as much as possible." Clients who need specific 82 * compression should enable those individually so they can 83 * verify the level of support. */ 84 /* Clear any warning messages set by the above functions. */ 85 archive_clear_error(a); 86 return (ARCHIVE_OK); 87 } 88