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/*
* Copyright 2003-2017 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.
*/
/**
* zip archive handling (requires zziplib)
*/
#include "config.h"
#include "ZzipArchivePlugin.hxx"
#include "../ArchivePlugin.hxx"
#include "../ArchiveFile.hxx"
#include "../ArchiveVisitor.hxx"
#include "input/InputStream.hxx"
#include "fs/Path.hxx"
#include "util/RefCount.hxx"
#include "util/RuntimeError.hxx"
#include <zzip/zzip.h>
class ZzipArchiveFile final : public ArchiveFile {
public:
RefCount ref;
ZZIP_DIR *const dir;
ZzipArchiveFile(ZZIP_DIR *_dir)
:ArchiveFile(zzip_archive_plugin), dir(_dir) {}
~ZzipArchiveFile() {
zzip_dir_close(dir);
}
void Unref() {
if (ref.Decrement())
delete this;
}
virtual void Close() override {
Unref();
}
virtual void Visit(ArchiveVisitor &visitor) override;
InputStream *OpenStream(const char *path,
Mutex &mutex, Cond &cond) override;
};
/* archive open && listing routine */
static ArchiveFile *
zzip_archive_open(Path pathname)
{
ZZIP_DIR *dir = zzip_dir_open(pathname.c_str(), nullptr);
if (dir == nullptr)
throw FormatRuntimeError("Failed to open ZIP file %s",
pathname.c_str());
return new ZzipArchiveFile(dir);
}
inline void
ZzipArchiveFile::Visit(ArchiveVisitor &visitor)
{
zzip_rewinddir(dir);
ZZIP_DIRENT dirent;
while (zzip_dir_read(dir, &dirent))
//add only files
if (dirent.st_size > 0)
visitor.VisitArchiveEntry(dirent.d_name);
}
/* single archive handling */
struct ZzipInputStream final : public InputStream {
ZzipArchiveFile *archive;
ZZIP_FILE *file;
ZzipInputStream(ZzipArchiveFile &_archive, const char *_uri,
Mutex &_mutex, Cond &_cond,
ZZIP_FILE *_file)
:InputStream(_uri, _mutex, _cond),
archive(&_archive), file(_file) {
//we are seekable (but its not recommendent to do so)
seekable = true;
ZZIP_STAT z_stat;
zzip_file_stat(file, &z_stat);
size = z_stat.st_size;
SetReady();
archive->ref.Increment();
}
~ZzipInputStream() {
zzip_file_close(file);
archive->Unref();
}
/* virtual methods from InputStream */
bool IsEOF() noexcept override;
size_t Read(void *ptr, size_t size) override;
void Seek(offset_type offset) override;
};
InputStream *
ZzipArchiveFile::OpenStream(const char *pathname,
Mutex &mutex, Cond &cond)
{
ZZIP_FILE *_file = zzip_file_open(dir, pathname, 0);
if (_file == nullptr)
throw FormatRuntimeError("not found in the ZIP file: %s",
pathname);
return new ZzipInputStream(*this, pathname,
mutex, cond,
_file);
}
size_t
ZzipInputStream::Read(void *ptr, size_t read_size)
{
const ScopeUnlock unlock(mutex);
int ret = zzip_file_read(file, ptr, read_size);
if (ret < 0)
throw std::runtime_error("zzip_file_read() has failed");
offset = zzip_tell(file);
return ret;
}
bool
ZzipInputStream::IsEOF() noexcept
{
return offset_type(zzip_tell(file)) == size;
}
void
ZzipInputStream::Seek(offset_type new_offset)
{
const ScopeUnlock unlock(mutex);
zzip_off_t ofs = zzip_seek(file, new_offset, SEEK_SET);
if (ofs < 0)
throw std::runtime_error("zzip_seek() has failed");
offset = ofs;
}
/* exported structures */
static const char *const zzip_archive_extensions[] = {
"zip",
nullptr
};
const ArchivePlugin zzip_archive_plugin = {
"zzip",
nullptr,
nullptr,
zzip_archive_open,
zzip_archive_extensions,
};
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