WIP: Add statement filtering

1 files changed, 16 insertions, 0 deletions

diff --git a/serd/serd.h b/serd/serd.h
index 794fe285..78a1d0cf 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -1243,6 +1243,22 @@ SerdSink*
 serd_normaliser_new(const SerdSink* target, const SerdEnv* env);
 
 /**
+   Return a sink that filters out statements that do not match a pattern.
+
+   The returned sink acts like `target` in all respects, except statements that
+   do not match the pattern are dropped.  Only statements where each node is
+   either equivalent to the corresponding pattern node, or the pattern node is
+   null, will be passed through to the target sink.
+*/
+SERD_API
+SerdSink*
+serd_filter_new(const SerdSink* target,
+                const SerdNode* subject,
+                const SerdNode* predicate,
+                const SerdNode* object,
+                const SerdNode* graph);
+
+/**
    @}
    @name Reader
    @{