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/* This file is part of GNU tar.
Copyright (C) 2007 Free Software Foundation, Inc.
Written by Sergey Poznyakoff.
GNU tar is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any later
version.
GNU tar 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 General
Public License for more details.
You should have received a copy of the GNU General Public License along
with GNU tar. If not, see <http://www.gnu.org/licenses/>. */
#include <system.h>
#include "common.h"
struct compression_suffix
{
const char *suffix;
size_t length;
const char *program;
};
struct compression_suffix compression_suffixes[] = {
#define S(s,p) #s, sizeof (#s) - 1, #p
{ S(gz, gzip) },
{ S(tgz, gzip) },
{ S(taz, gzip) },
{ S(Z, compress) },
{ S(taZ, compress) },
{ S(bz2, bzip2) },
{ S(tbz, bzip2) },
{ S(tbz2, bzip2) },
{ S(tz2, bzip2) },
{ S(lzma, lzma) },
{ S(tlz, lzma) },
#undef S
};
int nsuffixes = sizeof (compression_suffixes) /
sizeof (compression_suffixes[0]);
static const char *
find_compression_program (const char *name, const char *defprog)
{
char *suf = strrchr (name, '.');
if (suf)
{
int i;
size_t len;
suf++;
len = strlen (suf);
for (i = 0; i < nsuffixes; i++)
{
if (compression_suffixes[i].length == len
&& memcmp (compression_suffixes[i].suffix, suf, len) == 0)
return compression_suffixes[i].program;
}
}
return defprog;
}
void
set_comression_program_by_suffix (const char *name, const char *defprog)
{
const char *program = find_compression_program (name, defprog);
if (program)
use_compress_program_option = program;
}
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