X-Git-Url: http://g0dil.de/git?a=blobdiff_plain;f=senf%2FPackets%2FGenericTLV.hh;h=8d1357fda5d5c3e2c75eb1d98cdf7dbb135c7477;hb=f13780e9e4da7df981d6f6542fbdc714beb34765;hp=b0dab34c8b252ce728a337edc19ecd7d5dbd845a;hpb=9ffdaae4804503c4f36a53747c852a87ee626b9e;p=senf.git

diff --git a/senf/Packets/GenericTLV.hh b/senf/Packets/GenericTLV.hh
index b0dab34..8d1357f 100644
--- a/senf/Packets/GenericTLV.hh
+++ b/senf/Packets/GenericTLV.hh
@@ -126,7 +126,8 @@ namespace senf {
         \endcode  
 
         \see 
-            IPv6GenericOptionTLVParser, WLANGenericInfoElementParser, MIHGenericTLVParser 
+            IPv6GenericOptionParser, WLANGenericInfoElementParser, MIHGenericTLVParser \n
+            GenericTLVParserRegistry
      */
     template <class Base>
     class GenericTLVParserBase : public Base
@@ -148,7 +149,7 @@ namespace senf {
         bool is() const;
 
         senf::PacketInterpreterBase::range value() const;
-        
+
         void dump(std::ostream & os) const;
         
 #ifndef DOXYGEN
@@ -183,30 +184,88 @@ namespace senf {
     namespace detail {
         template <class BaseParser>
         struct GenericTLVParserRegistry_EntryBase {
-            virtual void dump(GenericTLVParserBase<BaseParser> const & parser, std::ostream & os) = 0;
+            virtual void dump(GenericTLVParserBase<BaseParser> const & parser, std::ostream & os) const = 0;
+            virtual PacketParserBase::size_type bytes(GenericTLVParserBase<BaseParser> const & parser) const = 0;
         };
     
         template <class BaseParser, class Parser>
         struct GenericTLVParserRegistry_Entry
             : GenericTLVParserRegistry_EntryBase<BaseParser>
         {
-            virtual void dump(GenericTLVParserBase<BaseParser> const & parser, std::ostream & os);
+            virtual void dump(GenericTLVParserBase<BaseParser> const & parser, std::ostream & os) const;
+            virtual PacketParserBase::size_type bytes(GenericTLVParserBase<BaseParser> const & parser) const;
+        };
+        
+        //Helper Functor for STL-compatible predicate (E.g. find_if, for_each ...)
+        template <class BaseParser, class Parser>
+        class Predicate
+        {
+            public:
+                const bool operator() (BaseParser const &p) const{
+                    return p.template is<Parser>();
+                }
         };
     }
     
-    template <class BaseParser>
+    /** \brief TLV parser registration facility
+
+        The %GenericTLVParserRegistry provides a generic facility to globally register concrete
+        TLV parser by the type value. The concrete TLV parser must therefore provide a \c typeId
+        member. See GenericTLVParserBase for details about the assumed class structure.
+        
+        Every registry is identified by the base tlv parser class. Parsers can be registered 
+        statically only: 
+        \code
+        GenericTLVParserRegistry<MyTLVParserBase>::RegistrationProxy<ConcreteTLVParser>
+            registerConcreteTLVParser;
+        \endcode 
+        This global variable declaration will register ConcreteTLVParser. The variable 
+        registerConcreteTLVParser is a dummy. It's only function is to force the call of 
+        it's constructor during global construction time. This static registration only
+        works when the symbol is included into the final binary.
+        
+        To simplify the registration the \ref SENF_PACKET_TLV_REGISTRY_REGISTER macro can be used.
+        The \c ConreteTLVParser must therefore provide a \c Registry typedef pointing to the
+        %GenericTLVParserRegistry; typically you put this typedef to the TLVBaseParser class.
+        \code
+        struct MyTLVParserBase : public senf::PacketParserBase
+        {
+            ...
+            typedef GenericTLVParserRegistry<MyTLVParserBase> Registry;
+        };
+        struct MyConcreteTLVParser : public MyTLVParserBase
+        {
+            ....
+            static const type_t::value_type typeId = 0x42;
+            void dump(std::ostream & os) const;
+        };
+        
+        // register MyConcreteTLVParser to the MyTLVParserBase-Registry with the type id 0x42:
+        SENF_PACKET_TLV_REGISTRY_REGISTER( MyConcreteTLVParser );
+        \endcode
+        
+        The registry provides a dump() member to dump an instance of a generic TLV parser.
+        If the type value of the given TLV parser is registered the generic tlv will be
+        casted to the registered concrete TLV parser and the dump member from this parser
+        will be called.
+        
+        \see
+            GenericTLVParserBase for the general TLV class structure \n
+            IPv6OptionParser::Registry, WLANInfoElementParser::Registry,
+            MIHBaseTLVParser::Registry 
+     */
+    template <class BaseParser, class Keytype = typename BaseParser::type_t::value_type>
     class GenericTLVParserRegistry
-        : public senf::singleton<GenericTLVParserRegistry<BaseParser> >
+        : public senf::singleton<GenericTLVParserRegistry<BaseParser,Keytype> >
     {
-        typedef boost::ptr_map<
-            typename BaseParser::type_t::value_type, 
+        typedef boost::ptr_map<Keytype, 
             detail::GenericTLVParserRegistry_EntryBase<BaseParser> > Map;
         Map map_;
         
         GenericTLVParserRegistry() {};
     public:
-        using senf::singleton<GenericTLVParserRegistry<BaseParser> >::instance;
-        friend class senf::singleton<GenericTLVParserRegistry<BaseParser> >;
+        using senf::singleton<GenericTLVParserRegistry<BaseParser,Keytype> >::instance;
+        friend class senf::singleton<GenericTLVParserRegistry<BaseParser,Keytype> >;
         
         template <class PacketParser>
         struct RegistrationProxy {
@@ -216,14 +275,35 @@ namespace senf {
         template <typename Parser>
         void registerParser();
         
-        void dump(GenericTLVParserBase<BaseParser> const & parser, std::ostream & os);
+        typedef GenericTLVParserBase<BaseParser> GenericTLVParser;
+        
+        bool isRegistered(GenericTLVParserBase<BaseParser> const & parser) const;
+        bool isRegistered(Keytype const & key) const;
+        
+        void dump(GenericTLVParser const & parser, std::ostream & os) const;
+        void dump(GenericTLVParser const & parser, Keytype const & key, std::ostream & os) const;
+        
+        PacketParserBase::size_type bytes(GenericTLVParser const & parser) const;
+    };
+        
+    struct TLVParserNotRegisteredException : public senf::Exception
+    { 
+        TLVParserNotRegisteredException() : senf::Exception("tlv parser not registered") {} 
     };
+
         
-#   define SENF_PACKET_TLV_REGISTRY_REGISTER( BaseTLVParser, ConreteTLVParser )     \
-        namespace {                                                                 \
-            senf::GenericTLVParserRegistry<BaseTLVParser>                           \
-                ::RegistrationProxy<ConreteTLVParser>                               \
-                    BOOST_PP_CAT(tlvparserRegistration_, __LINE__);                 \
+    /** \brief Statically add an entry to a TLV parser registry
+
+        This macro will declare an anonymous global variable in such a way, that constructing 
+        this variable will register the given tlv parser.
+
+        \hideinitializer
+        \see senf::GenericTLVParserRegistry
+     */
+#   define SENF_PACKET_TLV_REGISTRY_REGISTER( ConreteTLVParser )                \
+        namespace {                                                             \
+            ConreteTLVParser::Registry::RegistrationProxy<ConreteTLVParser>     \
+                    BOOST_PP_CAT(tlvparserRegistration_, __LINE__);             \
         }
         
 }