PlaylistPrint: throw PlaylistError on error

src/PlaylistPrint.cxx

@@ -46,7 +46,7 @@ playlist_print_uris(Response &r, Partition &partition,
 	queue_print_uris(r, partition, queue, 0, queue.GetLength());
 }
 
-bool
+void
 playlist_print_info(Response &r, Partition &partition,
 		    const playlist &playlist,
 		    unsigned start, unsigned end)
@@ -59,13 +59,12 @@ playlist_print_info(Response &r, Partition &partition,
 
 	if (start > end)
 		/* an invalid "start" offset is fatal */
-		return false;
+		throw PlaylistError::BadRange();
 
 	queue_print_info(r, partition, queue, start, end);
-	return true;
 }
 
-bool
+void
 playlist_print_id(Response &r, Partition &partition, const playlist &playlist,
 		  unsigned id)
 {
@@ -74,10 +73,10 @@ playlist_print_id(Response &r, Partition &partition, const playlist &playlist,
 	position = playlist.queue.IdToPosition(id);
 	if (position < 0)
 		/* no such song */
-		return false;
+		throw PlaylistError::NoSuchSong();
 
-	return playlist_print_info(r, partition,
-				   playlist, position, position + 1);
+	playlist_print_info(r, partition,
+			    playlist, position, position + 1);
 }
 
 bool

src/PlaylistPrint.hxx

@@ -41,8 +41,10 @@ playlist_print_uris(Response &r, Partition &partition,
  * information about the songs.  The "end" offset is decreased
  * automatically if it is too large; passing UINT_MAX is allowed.
  * This function however fails when the start offset is invalid.
+ *
+ * Throws #PlaylistError if the range is invalid.
  */
-bool
+void
 playlist_print_info(Response &r, Partition &partition,
 		    const playlist &playlist,
 		    unsigned start, unsigned end);
@@ -50,9 +52,9 @@ playlist_print_info(Response &r, Partition &partition,
 /**
  * Sends the song with the specified id to the client.
  *
- * @return true on suite, false if there is no such song
+ * Throws #PlaylistError if the range is invalid.
  */
-bool
+void
 playlist_print_id(Response &r, Partition &partition,
 		  const playlist &playlist, unsigned id);
 

src/command/QueueCommands.cxx

@@ -251,11 +251,8 @@ handle_playlistinfo(Client &client, Request args, Response &r)
 {
 	RangeArg range = args.ParseOptional(0, RangeArg::All());
 
-	if (!playlist_print_info(r, client.partition, client.playlist,
-				 range.start, range.end))
-		return print_playlist_result(r,
-					     PlaylistResult::BAD_RANGE);
-
+	playlist_print_info(r, client.partition, client.playlist,
+			    range.start, range.end);
 	return CommandResult::OK;
 }
 
@@ -264,10 +261,8 @@ handle_playlistid(Client &client, Request args, Response &r)
 {
 	if (!args.IsEmpty()) {
 		unsigned id = args.ParseUnsigned(0);
-		bool ret = playlist_print_id(r, client.partition,
-					     client.playlist, id);
-		if (!ret)
-			return print_playlist_result(r, PlaylistResult::NO_SUCH_SONG);
+		playlist_print_id(r, client.partition,
+				  client.playlist, id);
 	} else {
 		playlist_print_info(r, client.partition, client.playlist,
 				    0, std::numeric_limits<unsigned>::max());