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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "ArchiveInputPlugin.hxx"
#include "archive/ArchiveDomain.hxx"
#include "archive/ArchiveLookup.hxx"
#include "archive/ArchiveList.hxx"
#include "archive/ArchivePlugin.hxx"
#include "archive/ArchiveFile.hxx"
#include "InputPlugin.hxx"
#include "fs/Traits.hxx"
#include "util/Alloc.hxx"
#include "Log.hxx"
#include <stdlib.h>
/**
* select correct archive plugin to handle the input stream
* may allow stacking of archive plugins. for example for handling
* tar.gz a gzip handler opens file (through inputfile stream)
* then it opens a tar handler and sets gzip inputstream as
* parent_stream so tar plugin fetches file data from gzip
* plugin and gzip fetches file from disk
*/
static InputStream *
input_archive_open(const char *pathname,
Mutex &mutex, Cond &cond,
Error &error)
{
const struct archive_plugin *arplug;
InputStream *is;
if (!PathTraitsFS::IsAbsolute(pathname))
return nullptr;
char *pname = strdup(pathname);
// archive_lookup will modify pname when true is returned
const char *archive, *filename, *suffix;
if (!archive_lookup(pname, &archive, &filename, &suffix)) {
FormatDebug(archive_domain,
"not an archive, lookup %s failed", pname);
free(pname);
return nullptr;
}
//check which archive plugin to use (by ext)
arplug = archive_plugin_from_suffix(suffix);
if (!arplug) {
FormatWarning(archive_domain,
"can't handle archive %s", archive);
free(pname);
return nullptr;
}
auto file = archive_file_open(arplug, archive, error);
if (file == nullptr) {
free(pname);
return nullptr;
}
//setup fileops
is = file->OpenStream(filename, mutex, cond, error);
free(pname);
file->Close();
return is;
}
const InputPlugin input_plugin_archive = {
"archive",
nullptr,
nullptr,
input_archive_open,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr,
};
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