src/playlist.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2017 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         playlist->version = 0;
  35
  36         for (unsigned i = 0; i < playlist->list->len; ++i) {
  37                 struct mpd_song *song = playlist_get(playlist, i);
  38
  39                 mpd_song_free(song);
  40         }
  41
  42         g_ptr_array_set_size(playlist->list, 0);
  43 }
  44
  45 gint
  46 mpdclient_playlist_free(struct mpdclient_playlist *playlist)
  47 {
  48         if (playlist->list != NULL) {
  49                 playlist_clear(playlist);
  50                 g_ptr_array_free(playlist->list, TRUE);
  51         }
  52
  53         memset(playlist, 0, sizeof(*playlist));
  54         return 0;
  55 }
  56
  57 const struct mpd_song *
  58 playlist_get_song(const struct mpdclient_playlist *playlist, gint idx)
  59 {
  60         if (idx < 0 || (guint)idx >= playlist_length(playlist))
  61                 return NULL;
  62
  63         return playlist_get(playlist, idx);
  64 }
  65
  66 void
  67 playlist_move(struct mpdclient_playlist *playlist,
  68               unsigned dest, unsigned src)
  69 {
  70         assert(playlist != NULL);
  71         assert(src < playlist_length(playlist));
  72         assert(dest < playlist_length(playlist));
  73         assert(src != dest);
  74
  75         struct mpd_song *song = playlist_get(playlist, src);
  76
  77         if (src < dest) {
  78                 memmove(&playlist->list->pdata[src],
  79                         &playlist->list->pdata[src + 1],
  80                         sizeof(playlist->list->pdata[0]) * (dest - src));
  81                 playlist->list->pdata[dest] = song;
  82         } else {
  83                 memmove(&playlist->list->pdata[dest + 1],
  84                         &playlist->list->pdata[dest],
  85                         sizeof(playlist->list->pdata[0]) * (src - dest));
  86                 playlist->list->pdata[dest] = song;
  87         }
  88 }
  89
  90 const struct mpd_song *
  91 playlist_lookup_song(const struct mpdclient_playlist *playlist, unsigned id)
  92 {
  93         for (guint i = 0; i < playlist_length(playlist); ++i) {
  94                 struct mpd_song *song = playlist_get(playlist, i);
  95                 if (mpd_song_get_id(song) == id)
  96                         return song;
  97         }
  98
  99         return NULL;
 100 }
 101
 102 gint
 103 playlist_get_index(const struct mpdclient_playlist *playlist,
 104                    const struct mpd_song *song)
 105 {
 106         for (guint i = 0; i < playlist_length(playlist); ++i) {
 107                 if (playlist_get(playlist, i) == song)
 108                         return (gint)i;
 109         }
 110
 111         return -1;
 112 }
 113
 114 gint
 115 playlist_get_index_from_id(const struct mpdclient_playlist *playlist,
 116                            unsigned id)
 117 {
 118         for (guint i = 0; i < playlist_length(playlist); ++i) {
 119                 const struct mpd_song *song = playlist_get(playlist, i);
 120                 if (mpd_song_get_id(song) == id)
 121                         return (gint)i;
 122         }
 123
 124         return -1;
 125 }
 126
 127 gint
 128 playlist_get_index_from_file(const struct mpdclient_playlist *playlist,
 129                              const gchar *filename)
 130 {
 131         for (guint i = 0; i < playlist_length(playlist); ++i) {
 132                 const struct mpd_song *song = playlist_get(playlist, i);
 133
 134                 if (strcmp(mpd_song_get_uri(song), filename) == 0)
 135                         return (gint)i;
 136         }
 137
 138         return -1;
 139 }
 140
 141 gint
 142 playlist_get_id_from_uri(const struct mpdclient_playlist *playlist,
 143                          const gchar *uri)
 144 {
 145         for (guint i = 0; i < playlist_length(playlist); ++i) {
 146                 const struct mpd_song *song = playlist_get(playlist, i);
 147
 148                 if (strcmp(mpd_song_get_uri(song), uri) == 0)
 149                         return mpd_song_get_id(song);
 150         }
 151
 152         return -1;
 153 }