src/playlist.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://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 "playlist.h"
  21
  22 #include <string.h>
  23
  24 #define ENABLE_PLCHANGES
  25
  26 #define MPD_ERROR(c) (c==NULL || c->connection==NULL || c->connection->error)
  27
  28 void
  29 playlist_init(struct mpdclient_playlist *playlist)
  30 {
  31         playlist->version = 0;
  32         playlist->list = g_ptr_array_sized_new(1024);
  33 }
  34
  35 void
  36 playlist_clear(struct mpdclient_playlist *playlist)
  37 {
  38         guint i;
  39
  40         playlist->version = 0;
  41
  42         for (i = 0; i < playlist->list->len; ++i) {
  43                 struct mpd_song *song = playlist_get(playlist, i);
  44
  45                 mpd_song_free(song);
  46         }
  47
  48         g_ptr_array_set_size(playlist->list, 0);
  49 }
  50
  51 gint
  52 mpdclient_playlist_free(struct mpdclient_playlist *playlist)
  53 {
  54         if (playlist->list != NULL) {
  55                 playlist_clear(playlist);
  56                 g_ptr_array_free(playlist->list, TRUE);
  57         }
  58
  59         memset(playlist, 0, sizeof(*playlist));
  60         return 0;
  61 }
  62
  63 const struct mpd_song *
  64 playlist_get_song(const struct mpdclient_playlist *playlist, gint idx)
  65 {
  66         if (idx < 0 || (guint)idx >= playlist_length(playlist))
  67                 return NULL;
  68
  69         return playlist_get(playlist, idx);
  70 }
  71
  72 const struct mpd_song *
  73 playlist_lookup_song(const struct mpdclient_playlist *playlist, unsigned id)
  74 {
  75         for (guint i = 0; i < playlist_length(playlist); ++i) {
  76                 struct mpd_song *song = playlist_get(playlist, i);
  77                 if (mpd_song_get_id(song) == id)
  78                         return song;
  79         }
  80
  81         return NULL;
  82 }
  83
  84 gint
  85 playlist_get_index(const struct mpdclient_playlist *playlist,
  86                    const struct mpd_song *song)
  87 {
  88         for (guint i = 0; i < playlist_length(playlist); ++i) {
  89                 if (playlist_get(playlist, i) == song)
  90                         return (gint)i;
  91         }
  92
  93         return -1;
  94 }
  95
  96 gint
  97 playlist_get_index_from_id(const struct mpdclient_playlist *playlist,
  98                            unsigned id)
  99 {
 100         for (guint i = 0; i < playlist_length(playlist); ++i) {
 101                 const struct mpd_song *song = playlist_get(playlist, i);
 102                 if (mpd_song_get_id(song) == id)
 103                         return (gint)i;
 104         }
 105
 106         return -1;
 107 }
 108
 109 gint
 110 playlist_get_index_from_file(const struct mpdclient_playlist *playlist,
 111                              const gchar *filename)
 112 {
 113         for (guint i = 0; i < playlist_length(playlist); ++i) {
 114                 const struct mpd_song *song = playlist_get(playlist, i);
 115
 116                 if (strcmp(mpd_song_get_uri(song), filename) == 0)
 117                         return (gint)i;
 118         }
 119
 120         return -1;
 121 }
 122
 123 gint
 124 playlist_get_id_from_uri(const struct mpdclient_playlist *playlist,
 125                          const gchar *uri)
 126 {
 127         for (guint i = 0; i < playlist_length(playlist); ++i) {
 128                 const struct mpd_song *song = playlist_get(playlist, i);
 129
 130                 if (strcmp(mpd_song_get_uri(song), uri) == 0)
 131                         return mpd_song_get_id(song);
 132         }
 133
 134         return -1;
 135 }