From 31cb85c8b944fdabc6f3e2c9e68fe7a0810228fc Mon Sep 17 00:00:00 2001
From: Yves Fischer <yvesf-git@xapek.org>
Date: Sat, 17 Dec 2011 23:06:15 +0100
Subject: scala: code cleanup

---
 ebus-scala/Main.scala | 35 ++++++++++-------------------------
 1 file changed, 10 insertions(+), 25 deletions(-)

diff --git a/ebus-scala/Main.scala b/ebus-scala/Main.scala
index 05f40c2..b329ce4 100755
--- a/ebus-scala/Main.scala
+++ b/ebus-scala/Main.scala
@@ -82,8 +82,6 @@ class EbusL2MasterSlavePacket(source: Int,
 								     crc,
 								     rawLength);
 
-class FakePacket(val rawLength : Int);
-
 class EbusParseException(val message : String, val data : List[Int], val skipbytes : Int) extends Exception;
 
 object CRC {
@@ -137,7 +135,7 @@ object EbusL2Packet {
    * Im Erfolgsfall wird eine EbusL2Packet-Instanz als Option zurückgegen,
    * sonst None
    */
-  def apply(stream: Stream[Int]): Option[Any] = {
+  def apply(stream: Stream[Int]): EbusL2Packet = {
     var mystream = stream
     var rawLength = 0
     def readBytes(n:Int, msg : String) : List[Int] = {
@@ -190,9 +188,9 @@ object EbusL2Packet {
 	throw new EbusParseException("Bad SYN: 0x%02x".format(syn),
 				     stream.slice(0, rawLength).toList, rawLength);
       }
-      return Some(new EbusL2Packet(source, destination,
+      return new EbusL2Packet(source, destination,
 				   primaryCommand, secondaryCommand,
-				   payloadLength, payload, crc, rawLength))
+				   payloadLength, payload, crc, rawLength)
     }
 
     val ack = readBytes(1,"ACK")(0)
@@ -204,9 +202,9 @@ object EbusL2Packet {
 	throw new EbusParseException("Bad ACK: 0x%02x".format(ack),
 				     stream.slice(0, rawLength).toList, rawLength);
       }
-      return Some(new EbusL2Packet(source, destination,
+      return new EbusL2Packet(source, destination,
 				   primaryCommand, secondaryCommand,
-				   payloadLength, payload, crc, rawLength))
+				   payloadLength, payload, crc, rawLength)
     }
 
     // otherwise this is a Master-Slave Telegramm
@@ -238,10 +236,10 @@ object EbusL2Packet {
 				   stream.slice(0, rawLength).toList, rawLength);
     }
     
-    return Some(new EbusL2MasterSlavePacket(source, destination,
+    return new EbusL2MasterSlavePacket(source, destination,
 					    primaryCommand, secondaryCommand,
 					    payloadLength, payload, crc, 
-					    payloadSlaveLength, payloadSlave, crcSlave, rawLength));
+					    payloadSlaveLength, payloadSlave, crcSlave, rawLength);
   }
 }
 
@@ -254,22 +252,9 @@ class EbusReader(var stream : Stream[Int]) {
       stream = stream.dropWhile(_ == Ebus.SYN)
       
       try {
-	EbusL2Packet(stream) match {
-          case Some(packet : EbusL2Packet) => {
-	    stream = stream.drop(packet.rawLength)
-            return packet
-            }
-	  case Some(packet : FakePacket)  => {
-	    println("Fake paket - forward %d bytes".format(packet.rawLength))
-	    stream = stream.drop(packet.rawLength)
-	  }
-          case None => {
-              // Es konnte kein Paket eingelesen werden
-            // verschiebe die Anfangsposition um ein Byte
-	      App.println("Paket konnte nicht gelesen werden, verschiebe start um 1 byte")
-            stream = stream.drop(1)
-          }
-	}
+	val packet = EbusL2Packet(stream)
+	stream = stream.drop(packet.rawLength)
+	return packet
       } catch {
 	case exc : EbusParseException => {
 	  stream = stream.drop(exc.skipbytes)
-- 
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