/* * 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); context->iso = NULL; } /* 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); } 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 };