release v0.29

[ncmpc.git] / src / playlist.c

diff --git a/src/playlist.c b/src/playlist.c
index dfe9cad57b32b0a763eb50cc4aa233312565560c..548bcccf4e4209f5d0c1d95b2ee13b9b16f51399 100644 (file)
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -1,21 +1,21 @@
 /* ncmpc (Ncurses MPD Client)
- * (c) 2004-2009 The Music Player Daemon Project
+ * (c) 2004-2017 The Music Player Daemon Project
  * Project homepage: http://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.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
+ */
 
 #include "playlist.h"
 
@@ -31,11 +31,9 @@ playlist_init(struct mpdclient_playlist *playlist)
 void
 playlist_clear(struct mpdclient_playlist *playlist)
 {
-       guint i;
-
        playlist->version = 0;
 
-       for (i = 0; i < playlist->list->len; ++i) {
+       for (unsigned i = 0; i < playlist->list->len; ++i) {
                struct mpd_song *song = playlist_get(playlist, i);
 
                mpd_song_free(song);
@@ -65,6 +63,30 @@ playlist_get_song(const struct mpdclient_playlist *playlist, gint idx)
        return playlist_get(playlist, idx);
 }
 
+void
+playlist_move(struct mpdclient_playlist *playlist,
+             unsigned dest, unsigned src)
+{
+       assert(playlist != NULL);
+       assert(src < playlist_length(playlist));
+       assert(dest < playlist_length(playlist));
+       assert(src != dest);
+
+       struct mpd_song *song = playlist_get(playlist, src);
+
+       if (src < dest) {
+               memmove(&playlist->list->pdata[src],
+                       &playlist->list->pdata[src + 1],
+                       sizeof(playlist->list->pdata[0]) * (dest - src));
+               playlist->list->pdata[dest] = song;
+       } else {
+               memmove(&playlist->list->pdata[dest + 1],
+                       &playlist->list->pdata[dest],
+                       sizeof(playlist->list->pdata[0]) * (src - dest));
+               playlist->list->pdata[dest] = song;
+       }
+}
+
 const struct mpd_song *
 playlist_lookup_song(const struct mpdclient_playlist *playlist, unsigned id)
 {