playlist: pass const playlist pointers

src/playlist.c

@@ -247,13 +247,13 @@ playPlaylistIfPlayerStopped(struct playlist *playlist)
 }
 
 bool
-getPlaylistRepeatStatus(struct playlist *playlist)
+getPlaylistRepeatStatus(const struct playlist *playlist)
 {
 	return playlist->queue.repeat;
 }
 
 bool
-getPlaylistRandomStatus(struct playlist *playlist)
+getPlaylistRandomStatus(const struct playlist *playlist)
 {
 	return playlist->queue.random;
 }
@@ -323,7 +323,7 @@ void setPlaylistRandomStatus(struct playlist *playlist, bool status)
 	idle_add(IDLE_OPTIONS);
 }
 
-int getPlaylistCurrentSong(struct playlist *playlist)
+int getPlaylistCurrentSong(const struct playlist *playlist)
 {
 	if (playlist->current >= 0)
 		return queue_order_to_position(&playlist->queue,
@@ -333,19 +333,19 @@ int getPlaylistCurrentSong(struct playlist *playlist)
 }
 
 unsigned long
-getPlaylistVersion(struct playlist *playlist)
+getPlaylistVersion(const struct playlist *playlist)
 {
 	return playlist->queue.version;
 }
 
 int
-getPlaylistLength(struct playlist *playlist)
+getPlaylistLength(const struct playlist *playlist)
 {
 	return queue_length(&playlist->queue);
 }
 
 unsigned
-getPlaylistSongId(struct playlist *playlist, unsigned song)
+getPlaylistSongId(const struct playlist *playlist, unsigned song)
 {
 	return queue_position_to_id(&playlist->queue, song);
 }

src/playlist.h

@@ -153,9 +153,6 @@ void previousSongInPlaylist(struct playlist *playlist);
 
 void shufflePlaylist(struct playlist *playlist);
 
-enum playlist_result
-savePlaylist(struct playlist *playlist, const char *utf8file);
-
 void
 deleteASongFromPlaylist(struct playlist *playlist, const struct song *song);
 
@@ -172,24 +169,24 @@ enum playlist_result
 swapSongsInPlaylistById(struct playlist *playlist, unsigned id1, unsigned id2);
 
 bool
-getPlaylistRepeatStatus(struct playlist *playlist);
+getPlaylistRepeatStatus(const struct playlist *playlist);
 
 void setPlaylistRepeatStatus(struct playlist *playlist, bool status);
 
 bool
-getPlaylistRandomStatus(struct playlist *playlist);
+getPlaylistRandomStatus(const struct playlist *playlist);
 
 void setPlaylistRandomStatus(struct playlist *playlist, bool status);
 
-int getPlaylistCurrentSong(struct playlist *playlist);
+int getPlaylistCurrentSong(const struct playlist *playlist);
 
 unsigned
-getPlaylistSongId(struct playlist *playlist, unsigned song);
+getPlaylistSongId(const struct playlist *playlist, unsigned song);
 
-int getPlaylistLength(struct playlist *playlist);
+int getPlaylistLength(const struct playlist *playlist);
 
 unsigned long
-getPlaylistVersion(struct playlist *playlist);
+getPlaylistVersion(const struct playlist *playlist);
 
 enum playlist_result
 seekSongInPlaylist(struct playlist *playlist, unsigned song, float seek_time);