WIP: Add model

1 files changed, 24 insertions, 0 deletions

diff --git a/src/node.c b/src/node.c
index 523893df..32852dc1 100644
--- a/src/node.c
+++ b/src/node.c
@@ -247,6 +247,30 @@ serd_node_equals(const SerdNode* a, const SerdNode* b)
 	return false;
 }
 
+/** Compare nodes, considering NULL a match iff `wildcards` is true. */
+int
+serd_node_compare(const SerdNode* a, const SerdNode* b, bool wildcards)
+{
+	if (a == b) {
+		return 0;
+	} else if (!a || !b) {
+		return wildcards ? 0 : (a < b) ? -1 : (a > b) ? 1 : 0;
+	} else if (a->type != b->type) {
+		return a->type - b->type;
+	}
+
+	int cmp = strcmp(serd_node_get_string(a), serd_node_get_string(b));
+	if (cmp) {
+		return cmp;
+	}
+
+	cmp = serd_node_compare(serd_node_maybe_get_meta_c(a),
+	                        serd_node_maybe_get_meta_c(b),
+	                        false);
+
+	return cmp;
+}
+
 static size_t
 serd_uri_string_length(const SerdURI* uri)
 {