Add serd_world_get_blank()

2 files changed, 27 insertions, 2 deletions

diff --git a/src/world.c b/src/world.c
index 73bc9927..9503c578 100644
--- a/src/world.c
+++ b/src/world.c
@@ -18,6 +18,7 @@
 
 #include "world.h"
 
+#include "node.h"
 #include "serd_config.h"
 
 #if defined(USE_POSIX_FADVISE)
@@ -30,6 +31,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define BLANK_CHARS 12
+
 FILE*
 serd_world_fopen(SerdWorld* world, const char* path, const char* mode)
 {
@@ -78,13 +81,32 @@ serd_world_errorf(const SerdWorld* world, SerdStatus st, const char* fmt, ...)
 SerdWorld*
 serd_world_new(void)
 {
-  return (SerdWorld*)calloc(1, sizeof(SerdWorld));
+  SerdWorld* world = (SerdWorld*)calloc(1, sizeof(SerdWorld));
+
+  world->blank_node = serd_new_blank(SERD_STATIC_STRING("b00000000000"));
+
+  return world;
 }
 
 void
 serd_world_free(SerdWorld* world)
 {
-  free(world);
+  if (world) {
+    serd_node_free(world->blank_node);
+    free(world);
+  }
+}
+
+const SerdNode*
+serd_world_get_blank(SerdWorld* world)
+{
+  char* buf = serd_node_buffer(world->blank_node);
+  memset(buf, 0, BLANK_CHARS + 1);
+
+  world->blank_node->n_bytes =
+    (size_t)snprintf(buf, BLANK_CHARS + 1, "b%u", ++world->next_blank_id);
+
+  return world->blank_node;
 }
 
 void
diff --git a/src/world.h b/src/world.h
index ab7aad80..99f0c92d 100644
--- a/src/world.h
+++ b/src/world.h
@@ -19,11 +19,14 @@
 
 #include "serd/serd.h"
 
+#include <stdint.h>
 #include <stdio.h>
 
 struct SerdWorldImpl {
   SerdErrorFunc error_func;
   void*         error_handle;
+  uint32_t      next_blank_id;
+  SerdNode*     blank_node;
 };
 
 /// Open a file configured for fast sequential reading