Packets: senf::Parse_Variant documentation

[senf.git] / Packets / MPEGDVBBundle / SNDUPacket.hh

diff --git a/Packets/MPEGDVBBundle/SNDUPacket.hh b/Packets/MPEGDVBBundle/SNDUPacket.hh
index 5409272..7cb9e76 100644 (file)
--- a/Packets/MPEGDVBBundle/SNDUPacket.hh
+++ b/Packets/MPEGDVBBundle/SNDUPacket.hh
@@ -29,11 +29,8 @@
 // Custom includes
 #include <algorithm>
 #include <boost/crc.hpp>
-#include "Packets/PacketType.hh"
-#include "Packets/ParseInt.hh"
-#include "Packets/PacketRegistry.hh"
-#include "Packets/PacketParser.hh"
-#include "Packets/DefaultBundle/EthernetPacket.hh"
+#include "../../Packets/Packets.hh"
+#include "../DefaultBundle/EthernetPacket.hh"
 
 //#include "SNDUPacket.mpp"
 ///////////////////////////////hh.p////////////////////////////////////////
@@ -48,40 +45,33 @@ namespace senf {
      */
     struct Parse_SNDUPacket : public PacketParserBase
     {
-#       ifndef DOXYGEN
-        
-        SENF_PACKET_PARSER_NO_INIT(Parse_SNDUPacket);
+#       include SENF_PARSER()
 
-#       endif
-        
-        typedef Parse_Flag      <     0 > Parse_daaf;  // Destination Address Absent Field
-        typedef Parse_UIntField < 1, 16 > Parse_length;
-                
-        Parse_daaf d_bit() const {
-            return parse<Parse_daaf>( 0 );
-        }
-        Parse_length length() const {
-            return parse<Parse_length>( 0 );
-        }
-        Parse_UInt16 type() const {
-            return parse<Parse_UInt16>( 2 );
-        }
-        Parse_MAC destination() const {
-            BOOST_ASSERT( ! d_bit() );
-            return parse<Parse_MAC>( 4 );
-        }
-        Parse_UInt32 crc() const { 
-            return parse<Parse_UInt32>( data().size()-4 ); 
-        }
+        /* We first define the fields as they appear in the field. Some of the fields are declared
+           private. We provide custom accessors for those fields further down. */
+
+        SENF_PARSER_PRIVATE_BITFIELD ( d_bit_       ,  1 , unsigned );
+        SENF_PARSER_BITFIELD         ( length       , 15 , unsigned );
+        SENF_PARSER_FIELD            ( type         , Parse_UInt16  );
+        SENF_PARSER_PRIVATE_VARIANT  ( destination_ , d_bit_        , 
+                                                      (Parse_MAC) (VoidPacketParser) );
         
-        void init() const {
-            defaultInit();
-            d_bit() = false;
-        }
+        SENF_PARSER_FINALIZE( Parse_SNDUPacket );
         
-        PacketParserBase::size_type bytes() const;
+        Parse_MAC destination()         /// Only defined if d_bit() == \c false
+            { return destination_().get<0>(); }
+
+        bool d_bit()                    /// Destination absent bit
+            { return d_bit_(); }
+
+        void withDestination()          /// Clear destination absent bit
+            { destination_().init<0>(); }
         
-        static const size_type init_bytes = 2+2+4; // D-Bit + 15 bits length + 16 bits type field + 32 bits crc
+        void withoutDestination()       /// Set destination absent bit
+            { destination_().init<1>(); }
+
+        Parse_UInt32 crc() 
+            { return parse<Parse_UInt32>( data().size() - 4 ); }
 
         boost::uint32_t calcCrc() const;
     };