diff options
Diffstat (limited to 'serd')
| -rw-r--r-- | serd/serd.h | 88 |
1 files changed, 58 insertions, 30 deletions
diff --git a/serd/serd.h b/serd/serd.h index 5a6815f8..4dd7e7bd 100644 --- a/serd/serd.h +++ b/serd/serd.h @@ -849,39 +849,77 @@ serd_node_compare(const SerdNode* a, const SerdNode* b); @{ */ +/// Type of a SerdEvent +typedef enum { + SERD_BASE = 1, ///< Base URI changed + SERD_PREFIX = 2, ///< New URI prefix + SERD_STATEMENT = 3, ///< Statement + SERD_END = 4 ///< End of anonymous node +} SerdEventType; + /** - Sink (callback) for base URI changes + Event for base URI changes - Called whenever the base URI of the serialisation changes. + Emitted whenever the base URI of the serialisation changes. */ -typedef SerdStatus (*SerdBaseFunc)(void* handle, const SerdNode* uri); +typedef struct { + SerdEventType type; ///< #SERD_BASE + const SerdNode* uri; ///< Base URI +} SerdBaseEvent; /** - Sink function for namespace definitions + Event for namespace definitions - Called whenever a prefix is defined in the serialisation. + Emitted whenever a prefix is defined in the serialisation. */ -typedef SerdStatus (*SerdPrefixFunc)(void* handle, - const SerdNode* name, - const SerdNode* uri); +typedef struct { + SerdEventType type; ///< #SERD_PREFIX + const SerdNode* name; ///< Prefix name + const SerdNode* uri; ///< Namespace URI +} SerdPrefixEvent; /** - Sink function for statements + Event for statements - Called for every RDF statement in the serialisation. + Emitted for every RDF statement in the serialisation. */ -typedef SerdStatus (*SerdStatementFunc)(void* handle, - SerdStatementFlags flags, - const SerdStatement* statement); +typedef struct { + SerdEventType type; ///< #SERD_STATEMENT + SerdStatementFlags flags; ///< Flags for streaming pretty-printing + const SerdStatement* statement; ///< Statement +} SerdStatementEvent; /** - Sink function for anonymous node end markers + Event for the end of anonymous node descriptions - This is called to indicate that the anonymous node with the given + This is emitted to indicate that the anonymous node with the given `value` will no longer be referred to by any future statements (i.e. the anonymous serialisation of the node is finished). */ -typedef SerdStatus (*SerdEndFunc)(void* handle, const SerdNode* node); +typedef struct { + SerdEventType type; ///< #SERD_END + const SerdNode* node; ///< Anonymous blank node that is finished +} SerdEndEvent; + +/** + An event in a data stream + + Streams of data are represented as an ordered series of events. Events + represent everything that can occur in an RDF document, and are used to plumb + together different components. For example, when parsing a document, a + reader emits a stream of events which can be sent to a writer to serialise a + document, or to an inserter to build a model in memory. +*/ +typedef union { + SerdEventType type; ///< Event type (always set) + SerdBaseEvent base; ///< Base URI changed + SerdPrefixEvent prefix; ///< New namespace prefix + SerdStatementEvent statement; ///< Statement + SerdEndEvent end; ///< End of anonymous node +} SerdEvent; + +/// Function for handling events +typedef SerdStatus (*SerdEventFunc)(void* handle, const SerdEvent* event); /** @} @@ -1127,25 +1165,15 @@ SERD_API void serd_sink_free(SerdSink* sink); -/// Set a function to be called when the base URI changes -SERD_API -SerdStatus -serd_sink_set_base_func(SerdSink* sink, SerdBaseFunc base_func); - -/// Set a function to be called when a namespace prefix is defined -SERD_API -SerdStatus -serd_sink_set_prefix_func(SerdSink* sink, SerdPrefixFunc prefix_func); - -/// Set a function to be called when a statement is emitted +/// Set a function to be called for every event SERD_API SerdStatus -serd_sink_set_statement_func(SerdSink* sink, SerdStatementFunc statement_func); +serd_sink_set_event_func(SerdSink* sink, SerdEventFunc event_func); -/// Set a function to be called when an anonymous node ends +/// Send an event to the sink SERD_API SerdStatus -serd_sink_set_end_func(SerdSink* sink, SerdEndFunc end_func); +serd_sink_write_event(const SerdSink* sink, const SerdEvent* event); /// Set the base URI SERD_API |