1 /* This file is part of GNU tar.
2 Copyright 2007, 2009, 2013 Free Software Foundation, Inc.
4 Written by Sergey Poznyakoff.
6 GNU tar is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 3, or (at your option) any later
11 GNU tar is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
14 Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with GNU tar. If not, see <http://www.gnu.org/licenses/>. */
22 struct compression_suffix
29 static struct compression_suffix compression_suffixes[] = {
30 #define __CAT2__(a,b) a ## b
31 #define S(s,p) #s, sizeof (#s) - 1, __CAT2__(p,_PROGRAM)
46 { S(txz, XZ) }, /* Slackware */
51 static int nsuffixes = sizeof (compression_suffixes) /
52 sizeof (compression_suffixes[0]);
55 find_compression_program (const char *name, const char *defprog)
57 char *suf = strrchr (name, '.');
67 for (i = 0; i < nsuffixes; i++)
69 if (compression_suffixes[i].length == len
70 && memcmp (compression_suffixes[i].suffix, suf, len) == 0)
71 return compression_suffixes[i].program;
78 set_compression_program_by_suffix (const char *name, const char *defprog)
80 const char *program = find_compression_program (name, defprog);
82 use_compress_program_option = program;