src/archive_plugin.c

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "archive_plugin.h"
  21 #include "archive_internal.h"
  22
  23 #include <assert.h>
  24
  25 struct archive_file *
  26 archive_file_open(const struct archive_plugin *plugin, const char *path,
  27                   GError **error_r)
  28 {
  29         struct archive_file *file;
  30
  31         assert(plugin != NULL);
  32         assert(plugin->open != NULL);
  33         assert(path != NULL);
  34         assert(error_r == NULL || *error_r == NULL);
  35
  36         file = plugin->open(path, error_r);
  37
  38         if (file != NULL) {
  39                 assert(file->plugin != NULL);
  40                 assert(file->plugin->close != NULL);
  41                 assert(file->plugin->scan_reset != NULL);
  42                 assert(file->plugin->scan_next != NULL);
  43                 assert(file->plugin->open_stream != NULL);
  44                 assert(error_r == NULL || *error_r == NULL);
  45         } else {
  46                 assert(error_r == NULL || *error_r != NULL);
  47         }
  48
  49         return file;
  50 }
  51
  52 void
  53 archive_file_close(struct archive_file *file)
  54 {
  55         assert(file != NULL);
  56         assert(file->plugin != NULL);
  57         assert(file->plugin->close != NULL);
  58
  59         file->plugin->close(file);
  60 }
  61
  62 void
  63 archive_file_scan_reset(struct archive_file *file)
  64 {
  65         assert(file != NULL);
  66         assert(file->plugin != NULL);
  67         assert(file->plugin->scan_reset != NULL);
  68         assert(file->plugin->scan_next != NULL);
  69
  70         file->plugin->scan_reset(file);
  71 }
  72
  73 char *
  74 archive_file_scan_next(struct archive_file *file)
  75 {
  76         assert(file != NULL);
  77         assert(file->plugin != NULL);
  78         assert(file->plugin->scan_next != NULL);
  79
  80         return file->plugin->scan_next(file);
  81 }
  82
  83 struct input_stream *
  84 archive_file_open_stream(struct archive_file *file,
  85                          const char *path, GError **error_r)
  86 {
  87         assert(file != NULL);
  88         assert(file->plugin != NULL);
  89         assert(file->plugin->open_stream != NULL);
  90
  91         return file->plugin->open_stream(file, path, error_r);
  92 }