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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.
*/
/**
* iso archive handling (requires cdio, and iso9660)
*/
#include "config.h"
#include "archive_api.h"
#include "input_plugin.h"
#include <cdio/cdio.h>
#include <cdio/iso9660.h>
#include <glib.h>
#include <string.h>
#define CEILING(x, y) ((x+(y-1))/y)
typedef struct {
iso9660_t *iso;
iso9660_stat_t *statbuf;
size_t cur_ofs;
size_t max_blocks;
GSList *list;
GSList *iter;
} iso_context;
static const struct input_plugin iso_inputplugin;
/* archive open && listing routine */
static void
listdir_recur(const char *psz_path, iso_context *context)
{
iso9660_t *iso = context->iso;
CdioList_t *entlist;
CdioListNode_t *entnode;
iso9660_stat_t *statbuf;
char pathname[4096];
entlist = iso9660_ifs_readdir (iso, psz_path);
if (!entlist) {
return;
}
/* Iterate over the list of nodes that iso9660_ifs_readdir gives */
_CDIO_LIST_FOREACH (entnode, entlist) {
statbuf = (iso9660_stat_t *) _cdio_list_node_data (entnode);
strcpy(pathname, psz_path);
strcat(pathname, statbuf->filename);
if (_STAT_DIR == statbuf->type ) {
if (strcmp(statbuf->filename, ".") && strcmp(statbuf->filename, "..")) {
strcat(pathname, "/");
listdir_recur(pathname, context);
}
} else {
//remove leading /
context->list = g_slist_prepend( context->list,
g_strdup(pathname + 1));
}
}
_cdio_list_free (entlist, true);
}
static struct archive_file *
iso_open(char * pathname)
{
iso_context *context = g_malloc(sizeof(iso_context));
context->list = NULL;
/* open archive */
context->iso = iso9660_open (pathname);
if (context->iso == NULL) {
g_warning("iso %s open failed\n", pathname);
return NULL;
}
listdir_recur("/", context);
return (struct archive_file *)context;
}
static void
iso_scan_reset(struct archive_file *file)
{
iso_context *context = (iso_context *) file;
//reset iterator
context->iter = context->list;
}
static char *
iso_scan_next(struct archive_file *file)
{
iso_context *context = (iso_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
iso_close(struct archive_file *file)
{
iso_context *context = (iso_context *) file;
GSList *tmp;
if (context->list) {
//free list
for (tmp = context->list; tmp != NULL; tmp = g_slist_next(tmp))
g_free(tmp->data);
g_slist_free(context->list);
}
//close archive
iso9660_close(context->iso);
g_free(context);
}
/* single archive handling */
static bool
iso_open_stream(struct archive_file *file, struct input_stream *is,
const char *pathname)
{
iso_context *context = (iso_context *) file;
//setup file ops
is->plugin = &iso_inputplugin;
//insert back reference
is->data = context;
//we are not seekable
is->seekable = false;
context->statbuf = iso9660_ifs_stat_translate (context->iso, pathname);
if (context->statbuf == NULL) {
g_warning("file %s not found in iso\n", pathname);
return false;
}
context->cur_ofs = 0;
context->max_blocks = CEILING(context->statbuf->size, ISO_BLOCKSIZE);
return true;
}
static void
iso_is_close(struct input_stream *is)
{
iso_context *context = (iso_context *) is->data;
g_free(context->statbuf);
iso_close((struct archive_file *)context);
}
static size_t
iso_is_read(struct input_stream *is, void *ptr, size_t size)
{
iso_context *context = (iso_context *) is->data;
int toread, readed = 0;
int no_blocks, cur_block;
size_t left_bytes = context->statbuf->size - context->cur_ofs;
size = (size * ISO_BLOCKSIZE) / ISO_BLOCKSIZE;
if (left_bytes < size) {
toread = left_bytes;
no_blocks = CEILING(left_bytes,ISO_BLOCKSIZE);
} else {
toread = size;
no_blocks = toread / ISO_BLOCKSIZE;
}
if (no_blocks > 0) {
cur_block = context->cur_ofs / ISO_BLOCKSIZE;
readed = iso9660_iso_seek_read (context->iso, ptr,
context->statbuf->lsn + cur_block, no_blocks);
if (readed != no_blocks * ISO_BLOCKSIZE) {
g_warning("error reading ISO file at lsn %lu\n",
(long unsigned int) cur_block );
return -1;
}
if (left_bytes < size) {
readed = left_bytes;
}
context->cur_ofs += readed;
}
return readed;
}
static bool
iso_is_eof(struct input_stream *is)
{
iso_context *context = (iso_context *) is->data;
return (context->cur_ofs == context->statbuf->size);
}
/* exported structures */
static const char *const iso_extensions[] = {
"iso",
NULL
};
static const struct input_plugin iso_inputplugin = {
.close = iso_is_close,
.read = iso_is_read,
.eof = iso_is_eof,
};
const struct archive_plugin iso_plugin = {
.name = "iso",
.open = iso_open,
.scan_reset = iso_scan_reset,
.scan_next = iso_scan_next,
.open_stream = iso_open_stream,
.close = iso_close,
.suffixes = iso_extensions
};
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