Add blank node API

3 files changed, 40 insertions, 0 deletions

diff --git a/serd/serd.h b/serd/serd.h
index 41ce9820..2a79ff25 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -486,6 +486,16 @@ serd_node_new_literal(const char*     str,
                       const char*     lang);
 
 /**
+   Create a new blank node.
+
+   Note this function measures `str`, which is a common bottleneck.
+   Use sord_node_from_serd_node() instead if `str` is already measured.
+*/
+SERD_API
+SerdNode*
+serd_node_new_blank(const char* str);
+
+/**
    Return a deep copy of `node`.
 */
 SERD_API
diff --git a/src/node.c b/src/node.c
index c2bb3095..68a451f2 100644
--- a/src/node.c
+++ b/src/node.c
@@ -164,6 +164,20 @@ serd_node_new_literal(const char*     str,
 }
 
 SerdNode*
+serd_node_new_blank(const char* str)
+{
+	if (!str) {
+		return NULL;
+	}
+
+	const size_t n_bytes = strlen(str);
+	SerdNode*    node    = serd_node_malloc(n_bytes, 0, SERD_BLANK);
+	memcpy(serd_node_buffer(node), str, n_bytes);
+	node->n_bytes = n_bytes;
+	return node;
+}
+
+SerdNode*
 serd_node_copy(const SerdNode* node)
 {
 	if (!node) {
diff --git a/tests/serd_test.c b/tests/serd_test.c
index 4d31cbe3..76ba1966 100644
--- a/tests/serd_test.c
+++ b/tests/serd_test.c
@@ -472,8 +472,22 @@ test_relative_uri(void)
 }
 
 static void
+test_blank(void)
+{
+	assert(!serd_node_new_blank(NULL));
+
+	SerdNode* blank = serd_node_new_blank("b0");
+	assert(serd_node_get_length(blank) == 2);
+	assert(serd_node_get_flags(blank) == 0);
+	assert(!strcmp(serd_node_get_string(blank), "b0"));
+	serd_node_free(blank);
+}
+
+static void
 test_env(void)
 {
+	SerdWorld* world = serd_world_new();
+
 	SerdNode* u   = serd_node_new_string(SERD_URI, "http://example.org/foo");
 	SerdNode* b   = serd_node_new_string(SERD_CURIE, "invalid");
 	SerdNode* c   = serd_node_new_string(SERD_CURIE, "eg.2:b");
@@ -526,6 +540,7 @@ test_env(void)
 	serd_node_free(u);
 
 	serd_env_free(env);
+	serd_world_free(world);
 }
 
 static void
@@ -688,6 +703,7 @@ main(void)
 	test_literal();
 	test_uri_from_string();
 	test_relative_uri();
+	test_blank();
 	test_env();
 	test_read_chunks();