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/*
* Copyright (C) 2003-2013 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 "ArchiveInternal.hxx"
#include "ArchivePlugin.hxx"
#include "ArchiveVisitor.hxx"
#include "InputInternal.hxx"
#include "InputStream.hxx"
#include "InputPlugin.hxx"
#include "util/RefCount.hxx"
#include <zzip/zzip.h>
#include <glib.h>
#include <string.h>
struct ZzipArchiveFile {
struct archive_file base;
RefCount ref;
ZZIP_DIR *dir;
ZzipArchiveFile() {
archive_file_init(&base, &zzip_archive_plugin);
}
void Unref() {
if (!ref.Decrement())
return;
//close archive
zzip_dir_close (dir);
delete this;
}
void Visit(ArchiveVisitor &visitor);
};
extern const struct input_plugin zzip_input_plugin;
static inline GQuark
zzip_quark(void)
{
return g_quark_from_static_string("zzip");
}
/* archive open && listing routine */
static struct archive_file *
zzip_archive_open(const char *pathname, GError **error_r)
{
ZzipArchiveFile *context = new ZzipArchiveFile();
// open archive
context->dir = zzip_dir_open(pathname, NULL);
if (context->dir == NULL) {
g_set_error(error_r, zzip_quark(), 0,
"Failed to open ZIP file %s", pathname);
return NULL;
}
return &context->base;
}
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);
}
static void
zzip_archive_visit(archive_file *file, ArchiveVisitor &visitor)
{
ZzipArchiveFile *context = (ZzipArchiveFile *) file;
context->Visit(visitor);
}
static void
zzip_archive_close(struct archive_file *file)
{
ZzipArchiveFile *context = (ZzipArchiveFile *) file;
context->Unref();
}
/* single archive handling */
struct ZzipInputStream {
struct input_stream base;
ZzipArchiveFile *archive;
ZZIP_FILE *file;
ZzipInputStream(ZzipArchiveFile &_archive, const char *uri,
Mutex &mutex, Cond &cond,
ZZIP_FILE *_file)
:base(zzip_input_plugin, uri, mutex, cond),
archive(&_archive), file(_file) {
base.ready = true;
//we are seekable (but its not recommendent to do so)
base.seekable = true;
ZZIP_STAT z_stat;
zzip_file_stat(file, &z_stat);
base.size = z_stat.st_size;
archive->ref.Increment();
}
~ZzipInputStream() {
zzip_file_close(file);
archive->Unref();
}
};
static struct input_stream *
zzip_archive_open_stream(struct archive_file *file,
const char *pathname,
Mutex &mutex, Cond &cond,
GError **error_r)
{
ZzipArchiveFile *context = (ZzipArchiveFile *) file;
ZZIP_FILE *_file = zzip_file_open(context->dir, pathname, 0);
if (_file == nullptr) {
g_set_error(error_r, zzip_quark(), 0,
"not found in the ZIP file: %s", pathname);
return NULL;
}
ZzipInputStream *zis =
new ZzipInputStream(*context, pathname,
mutex, cond,
_file);
return &zis->base;
}
static void
zzip_input_close(struct input_stream *is)
{
ZzipInputStream *zis = (ZzipInputStream *)is;
delete zis;
}
static size_t
zzip_input_read(struct input_stream *is, void *ptr, size_t size,
GError **error_r)
{
ZzipInputStream *zis = (ZzipInputStream *)is;
int ret;
ret = zzip_file_read(zis->file, ptr, size);
if (ret < 0) {
g_set_error(error_r, zzip_quark(), ret,
"zzip_file_read() has failed");
return 0;
}
is->offset = zzip_tell(zis->file);
return ret;
}
static bool
zzip_input_eof(struct input_stream *is)
{
ZzipInputStream *zis = (ZzipInputStream *)is;
return (goffset)zzip_tell(zis->file) == is->size;
}
static bool
zzip_input_seek(struct input_stream *is,
goffset offset, int whence, GError **error_r)
{
ZzipInputStream *zis = (ZzipInputStream *)is;
zzip_off_t ofs = zzip_seek(zis->file, offset, whence);
if (ofs != -1) {
g_set_error(error_r, zzip_quark(), ofs,
"zzip_seek() has failed");
is->offset = ofs;
return true;
}
return false;
}
/* exported structures */
static const char *const zzip_archive_extensions[] = {
"zip",
NULL
};
const struct input_plugin zzip_input_plugin = {
nullptr,
nullptr,
nullptr,
nullptr,
zzip_input_close,
nullptr,
nullptr,
nullptr,
nullptr,
zzip_input_read,
zzip_input_eof,
zzip_input_seek,
};
const struct archive_plugin zzip_archive_plugin = {
"zzip",
nullptr,
nullptr,
zzip_archive_open,
zzip_archive_visit,
zzip_archive_open_stream,
zzip_archive_close,
zzip_archive_extensions,
};
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