/* the Music Player Daemon (MPD) * Copyright (C) 2008 Viliam Mateicka <viliam.mateicka@gmail.com> * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /** * zip archive handling (requires zziplib) */ #include "archive_api.h" #include "archive_api.h" #include "input_stream.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 };