queueSong() cannot fail

All (indirect) callers of queueSong() ensure that the queue state is
BLANK, so there is no need to check it in queueSong() again.  As a
side effect, queueSong() cannot fail anymore, and can return void.
Also, playlist_queueError and all its error handling can go away.

3 files changed, 8 insertions, 21 deletions

diff --git a/src/player.c b/src/player.c
index 2df6b6cd1..84fd163fe 100644
--- a/src/player.c
+++ b/src/player.c
@@ -165,15 +165,12 @@ char *getPlayerErrorStr(void)
 	return *error ? error : NULL;
 }
 
-int queueSong(Song * song)
+void queueSong(Song * song)
 {
-	if (pc.queueState == PLAYER_QUEUE_BLANK) {
-		set_current_song(song);
-		pc.queueState = PLAYER_QUEUE_FULL;
-		return 0;
-	}
+	assert(pc.queueState == PLAYER_QUEUE_BLANK);
 
-	return -1;
+	set_current_song(song);
+	pc.queueState = PLAYER_QUEUE_FULL;
 }
 
 enum player_queue_state getPlayerQueueState(void)
diff --git a/src/player.h b/src/player.h
index b3cf207ec..de237c4ba 100644
--- a/src/player.h
+++ b/src/player.h
@@ -129,7 +129,7 @@ int getPlayerError(void);
 
 void playerWait(void);
 
-int queueSong(Song * song);
+void queueSong(Song * song);
 
 enum player_queue_state getPlayerQueueState(void);
 
diff --git a/src/playlist.c b/src/playlist.c
index cc2a67f2f..0f6f1d010 100644
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -62,7 +62,6 @@ static int playlist_state = PLAYLIST_STATE_STOP;
 int playlist_max_length = DEFAULT_PLAYLIST_MAX_LENGTH;
 static int playlist_stopOnError;
 static int playlist_errorCount;
-static int playlist_queueError;
 static int playlist_noGoToNext;
 
 int playlist_saveAbsolutePaths = DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS;
@@ -491,11 +490,7 @@ static void queueNextSongInPlaylist(void)
 		      get_song_url(path_max_tmp,
 		                   playlist.
 				   songs[playlist.order[playlist.queued]]));
-		if (queueSong(playlist.songs[playlist.order[playlist.queued]]) <
-		    0) {
-			playlist.queued = -1;
-			playlist_queueError = 1;
-		}
+		queueSong(playlist.songs[playlist.order[playlist.queued]]);
 	} else if (playlist.length && playlist.repeat) {
 		if (playlist.length > 1 && playlist.random) {
 			randomizeOrder(0, playlist.length - 1);
@@ -506,11 +501,7 @@ static void queueNextSongInPlaylist(void)
 		      get_song_url(path_max_tmp,
 		                   playlist.
 		                   songs[playlist.order[playlist.queued]]));
-		if (queueSong(playlist.songs[playlist.order[playlist.queued]]) <
-		    0) {
-			playlist.queued = -1;
-			playlist_queueError = 1;
-		}
+		queueSong(playlist.songs[playlist.order[playlist.queued]]);
 	}
 }
 
@@ -851,7 +842,6 @@ static void playPlaylistOrderNumber(int orderNum)
 	playlist_state = PLAYLIST_STATE_PLAY;
 	playlist_noGoToNext = 0;
 	playlist.queued = -1;
-	playlist_queueError = 0;
 
 	DEBUG("playlist: play %i:\"%s\"\n", orderNum,
 	      get_song_url(path_max_tmp,
@@ -953,7 +943,7 @@ void syncPlayerAndPlaylist(void)
 	if (getPlayerState() == PLAYER_STATE_STOP)
 		playPlaylistIfPlayerStopped();
 	else
-		syncPlaylistWithQueue(!playlist_queueError);
+		syncPlaylistWithQueue(1);
 
 	syncCurrentPlayerDecodeMetadata();
 }