Add serd_node_compare()

1 files changed, 15 insertions, 0 deletions

diff --git a/include/serd/serd.h b/include/serd/serd.h
index 4067fa3f..5d0f7290 100644
--- a/include/serd/serd.h
+++ b/include/serd/serd.h
@@ -878,6 +878,21 @@ serd_node_equals(const SerdNode* SERD_NULLABLE a,
                  const SerdNode* SERD_NULLABLE b);
 
 /**
+   Compare two nodes.
+
+   Returns less than, equal to, or greater than zero if `a` is less than, equal
+   to, or greater than `b`, respectively.  NULL is treated as less than any
+   other node.
+
+   Nodes are ordered first by type, then by string value, then by language or
+   datatype, if present.
+*/
+SERD_PURE_API
+int
+serd_node_compare(const SerdNode* SERD_NONNULL a,
+                  const SerdNode* SERD_NONNULL b);
+
+/**
    @}
    @defgroup serd_nodes Nodes
    @{