src/playlist.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2010 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 void
  25 playlist_init(struct mpdclient_playlist *playlist)
  26 {
  27         playlist->version = 0;
  28         playlist->list = g_ptr_array_sized_new(1024);
  29 }
  30
  31 void
  32 playlist_clear(struct mpdclient_playlist *playlist)
  33 {
  34         guint i;
  35
  36         playlist->version = 0;
  37
  38         for (i = 0; i < playlist->list->len; ++i) {
  39                 struct mpd_song *song = playlist_get(playlist, i);
  40
  41                 mpd_song_free(song);
  42         }
  43
  44         g_ptr_array_set_size(playlist->list, 0);
  45 }
  46
  47 gint
  48 mpdclient_playlist_free(struct mpdclient_playlist *playlist)
  49 {
  50         if (playlist->list != NULL) {
  51                 playlist_clear(playlist);
  52                 g_ptr_array_free(playlist->list, TRUE);
  53         }
  54
  55         memset(playlist, 0, sizeof(*playlist));
  56         return 0;
  57 }
  58
  59 const struct mpd_song *
  60 playlist_get_song(const struct mpdclient_playlist *playlist, gint idx)
  61 {
  62         if (idx < 0 || (guint)idx >= playlist_length(playlist))
  63                 return NULL;
  64
  65         return playlist_get(playlist, idx);
  66 }
  67
  68 void
  69 playlist_move(struct mpdclient_playlist *playlist,
  70               unsigned dest, unsigned src)
  71 {
  72         struct mpd_song *song;
  73
  74         assert(playlist != NULL);
  75         assert(src < playlist_length(playlist));
  76         assert(dest < playlist_length(playlist));
  77         assert(src != dest);
  78
  79         song = playlist_get(playlist, src);
  80
  81         if (src < dest) {
  82                 memmove(&playlist->list->pdata[src],
  83                         &playlist->list->pdata[src + 1],
  84                         sizeof(playlist->list->pdata[0]) * (dest - src));
  85                 playlist->list->pdata[dest] = song;
  86         } else {
  87                 memmove(&playlist->list->pdata[dest + 1],
  88                         &playlist->list->pdata[dest],
  89                         sizeof(playlist->list->pdata[0]) * (src - dest));
  90                 playlist->list->pdata[dest] = song;
  91         }
  92 }
  93
  94 const struct mpd_song *
  95 playlist_lookup_song(const struct mpdclient_playlist *playlist, unsigned id)
  96 {
  97         for (guint i = 0; i < playlist_length(playlist); ++i) {
  98                 struct mpd_song *song = playlist_get(playlist, i);
  99                 if (mpd_song_get_id(song) == id)
 100                         return song;
 101         }
 102
 103         return NULL;
 104 }
 105
 106 gint
 107 playlist_get_index(const struct mpdclient_playlist *playlist,
 108                    const struct mpd_song *song)
 109 {
 110         for (guint i = 0; i < playlist_length(playlist); ++i) {
 111                 if (playlist_get(playlist, i) == song)
 112                         return (gint)i;
 113         }
 114
 115         return -1;
 116 }
 117
 118 gint
 119 playlist_get_index_from_id(const struct mpdclient_playlist *playlist,
 120                            unsigned id)
 121 {
 122         for (guint i = 0; i < playlist_length(playlist); ++i) {
 123                 const struct mpd_song *song = playlist_get(playlist, i);
 124                 if (mpd_song_get_id(song) == id)
 125                         return (gint)i;
 126         }
 127
 128         return -1;
 129 }
 130
 131 gint
 132 playlist_get_index_from_file(const struct mpdclient_playlist *playlist,
 133                              const gchar *filename)
 134 {
 135         for (guint i = 0; i < playlist_length(playlist); ++i) {
 136                 const struct mpd_song *song = playlist_get(playlist, i);
 137
 138                 if (strcmp(mpd_song_get_uri(song), filename) == 0)
 139                         return (gint)i;
 140         }
 141
 142         return -1;
 143 }
 144
 145 gint
 146 playlist_get_id_from_uri(const struct mpdclient_playlist *playlist,
 147                          const gchar *uri)
 148 {
 149         for (guint i = 0; i < playlist_length(playlist); ++i) {
 150                 const struct mpd_song *song = playlist_get(playlist, i);
 151
 152                 if (strcmp(mpd_song_get_uri(song), uri) == 0)
 153                         return mpd_song_get_id(song);
 154         }
 155
 156         return -1;
 157 }