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/*
* Copyright (C) 2003-2009 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 "archive_api.h"
#include "archive_api.h"
#include "input_plugin.h"
#include <zzip/zzip.h>
#include <glib.h>
#include <string.h>
typedef struct {
ZZIP_DIR *dir;
ZZIP_FILE *file;
size_t length;
GSList *list;
GSList *iter;
} zip_context;
static const struct input_plugin zip_inputplugin;
/* archive open && listing routine */
static struct archive_file *
zip_open(char * pathname)
{
zip_context *context = g_malloc(sizeof(zip_context));
ZZIP_DIRENT dirent;
// open archive
context->list = NULL;
context->dir = zzip_dir_open(pathname, 0);
if (context->dir == NULL) {
g_warning("zipfile %s open failed\n", pathname);
return NULL;
}
while (zzip_dir_read(context->dir, &dirent)) {
//add only files
if (dirent.st_size > 0) {
context->list = g_slist_prepend(context->list,
g_strdup(dirent.d_name));
}
}
return (struct archive_file *)context;
}
static void
zip_scan_reset(struct archive_file *file)
{
zip_context *context = (zip_context *) file;
//reset iterator
context->iter = context->list;
}
static char *
zip_scan_next(struct archive_file *file)
{
zip_context *context = (zip_context *) file;
char *data = NULL;
if (context->iter != NULL) {
///fetch data and goto next
data = context->iter->data;
context->iter = g_slist_next(context->iter);
}
return data;
}
static void
zip_close(struct archive_file *file)
{
zip_context *context = (zip_context *) file;
if (context->list) {
//free list
for (GSList *tmp = context->list; tmp != NULL; tmp = g_slist_next(tmp))
g_free(tmp->data);
g_slist_free(context->list);
}
//close archive
zzip_dir_close (context->dir);
context->dir = NULL;
}
/* single archive handling */
static bool
zip_open_stream(struct archive_file *file, struct input_stream *is,
const char *pathname)
{
zip_context *context = (zip_context *) file;
ZZIP_STAT z_stat;
//setup file ops
is->plugin = &zip_inputplugin;
//insert back reference
is->data = context;
//we are seekable (but its not recommendent to do so)
is->seekable = true;
context->file = zzip_file_open(context->dir, pathname, 0);
if (!context->file) {
g_warning("file %s not found in the zipfile\n", pathname);
return false;
}
zzip_file_stat(context->file, &z_stat);
context->length = z_stat.st_size;
return true;
}
static void
zip_is_close(struct input_stream *is)
{
zip_context *context = (zip_context *) is->data;
zzip_file_close (context->file);
}
static size_t
zip_is_read(struct input_stream *is, void *ptr, size_t size)
{
zip_context *context = (zip_context *) is->data;
int ret;
ret = zzip_file_read(context->file, ptr, size);
if (ret < 0) {
g_warning("error %d reading zipfile\n", ret);
return 0;
}
return ret;
}
static bool
zip_is_eof(struct input_stream *is)
{
zip_context *context = (zip_context *) is->data;
return ((size_t) zzip_tell(context->file) == context->length);
}
static bool
zip_is_seek(G_GNUC_UNUSED struct input_stream *is,
G_GNUC_UNUSED off_t offset, G_GNUC_UNUSED int whence)
{
zip_context *context = (zip_context *) is->data;
zzip_off_t ofs = zzip_seek(context->file, offset, whence);
if (ofs != -1) {
is->offset = ofs;
return true;
}
return false;
}
/* exported structures */
static const char *const zip_extensions[] = {
"zip",
NULL
};
static const struct input_plugin zip_inputplugin = {
.close = zip_is_close,
.read = zip_is_read,
.eof = zip_is_eof,
.seek = zip_is_seek,
};
const struct archive_plugin zip_plugin = {
.name = "zip",
.open = zip_open,
.scan_reset = zip_scan_reset,
.scan_next = zip_scan_next,
.open_stream = zip_open_stream,
.close = zip_close,
.suffixes = zip_extensions
};
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