From 8dbb1edfd28c73b02b3295a4f7a01869bd2237ec Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 29 Apr 2018 18:36:11 +0200
Subject: Add blank node API

---
 serd/serd.h       | 10 ++++++++++
 src/node.c        | 14 ++++++++++++++
 tests/serd_test.c | 16 ++++++++++++++++
 3 files changed, 40 insertions(+)

diff --git a/serd/serd.h b/serd/serd.h
index 9688ad4e..be819d55 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -484,6 +484,16 @@ serd_node_new_literal(const char*     str,
                       const SerdNode* datatype,
                       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);
+
 /**
    Simple wrapper for serd_node_new_uri() to resolve a URI node.
 */
diff --git a/src/node.c b/src/node.c
index 3c6c9d45..abe9304c 100644
--- a/src/node.c
+++ b/src/node.c
@@ -169,6 +169,20 @@ serd_node_new_literal(const char*     str,
 	return node;
 }
 
+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)
 {
diff --git a/tests/serd_test.c b/tests/serd_test.c
index 2b50e647..d46e01ba 100644
--- a/tests/serd_test.c
+++ b/tests/serd_test.c
@@ -472,9 +472,23 @@ test_relative_uri(void)
 	serd_node_free(base);
 }
 
+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");
@@ -527,6 +541,7 @@ test_env(void)
 	serd_node_free(u);
 
 	serd_env_free(env);
+	serd_world_free(world);
 }
 
 static void
@@ -689,6 +704,7 @@ main(void)
 	test_literal();
 	test_uri_from_string();
 	test_relative_uri();
+	test_blank();
 	test_env();
 	test_read_chunks();
 
-- 
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