Packets: Allow collections in derived parsers to reference aux fields in the base...

[senf.git] / Packets / 80221Bundle / TLVPacket.hh

diff --git a/Packets/80221Bundle/TLVPacket.hh b/Packets/80221Bundle/TLVPacket.hh
index 8f9398b..f2fdc36 100644 (file)
--- a/Packets/80221Bundle/TLVPacket.hh
+++ b/Packets/80221Bundle/TLVPacket.hh
@@ -35,19 +35,12 @@
 
 namespace senf {
 
-    /** \brief xxx
-        
-        \todo document me
-        \todo add usefull exceptions strings
-         
-    */
-    struct UnsuportedTLVPacketException : public senf::Exception
-    { UnsuportedTLVPacketException() 
-          : senf::Exception("length of length can be max. 4 bytes. Sorry."){} };
-
-    /** \brief xxx
-        \todo document me
-    */
+
+    struct TLVLengthException : public senf::Exception
+    { TLVLengthException() 
+          : senf::Exception("TLVLengthException"){} };
+
+    
     class DynamicTLVLengthParser 
         : public detail::packet::IntParserOps<DynamicTLVLengthParser, boost::uint32_t>,
           public PacketParserBase
@@ -67,60 +60,64 @@ namespace senf {
         size_type bytes() const;
         void init() const;
 
-    private:
-        typedef FlagParser      <    0 > ExtendedLengthFlagParser;
-        typedef UIntFieldParser < 1, 8 > FixedLengthParser;
-
-        ExtendedLengthFlagParser extended_length_flag() const {
-            return parse<ExtendedLengthFlagParser>( 0 );
-        }
+#       include SENF_PARSER()
+        SENF_PARSER_PRIVATE_BITFIELD ( extended_length_flag, 1,  bool     );
+        SENF_PARSER_PRIVATE_BITFIELD ( fixed_length_field,   7,  unsigned );
 
-        FixedLengthParser fixed_length_field() const {
-            return parse<FixedLengthParser>( 0 );
-        }
-        
         void resize(size_type size);
+        void shrink();
     };  
         
-    /** \brief parse TLVPacket Packet
-    
-        \todo document me
-     
-        \see TLVPacketType
-     */
-    template <class TypeParser, class LengthParser>
-    struct TLVPacketParser : public PacketParserBase
+
+    class BaseTLVPacketParser : public PacketParserBase
     {
 #       include SENF_PARSER()
+        SENF_PARSER_FIELD    ( type,   UInt8Parser            );
+        SENF_PARSER_FIELD_RO ( length, DynamicTLVLengthParser );
+        SENF_PARSER_FINALIZE ( BaseTLVPacketParser            );
         
-        SENF_PARSER_FIELD( type,   TypeParser );
-        SENF_PARSER_FIELD( length, LengthParser );
+        void maxLengthValue(DynamicTLVLengthParser::value_type v) const;
+        void shrinkLength() { length_().shrink(); };
         
-        SENF_PARSER_FINALIZE(TLVPacketParser);
+    protected:
+        size_type length_bytes() const { return length_().bytes(); };
+        void length(DynamicTLVLengthParser::value_type &v) { length_() = v; };
     };
-    
-    /** \brief generic TLV Packet type
+
+        
+    struct GenericTLVPacketParser : public BaseTLVPacketParser
+    {
+#       include SENF_PARSER()        
+        SENF_PARSER_INHERIT( BaseTLVPacketParser )
+        SENF_PARSER_FINALIZE( GenericTLVPacketParser );
         
-        \todo document me
+        SENF_PARSER_INIT() {
+            maxLengthValue( DynamicTLVLengthParser::max_value);
+        }
+        
+        senf::PacketInterpreterBase::range value() const;
         
-        \ingroup protocolbundle_mpegdvb
-     */
-    template <class TypeParser, class LengthParser>
-    struct TLVPacketType
-        : public PacketTypeBase
+        template <class ForwardReadableRange>
+        void value(ForwardReadableRange const &range);
+    };
+    
+    struct GenericTLVPacketType
+        : public PacketTypeBase,
+          public PacketTypeMixin<GenericTLVPacketType>
     {
-        typedef ConcretePacket<TLVPacketType<TypeParser, LengthParser> > packet;
-        typedef TLVPacketParser<TypeParser, LengthParser> parser;
+        typedef PacketTypeMixin<GenericTLVPacketType> mixin;
+        typedef ConcretePacket<GenericTLVPacketType> packet;
+        typedef GenericTLVPacketParser parser;
 
-        static optional_range nextPacketRange(packet p);
-        static size_type initSize();
+        using mixin::nextPacketRange;
+        using mixin::init;
+        using mixin::initSize;
         
         static void finalize(packet p);
-        
         static void dump(packet p, std::ostream & os);
     };
     
-    typedef ConcretePacket<TLVPacketType<UInt32Parser, DynamicTLVLengthParser> > MIHInfoElement;
+    typedef ConcretePacket<GenericTLVPacketType> GenericTLVPacket;
 }