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-rw-r--r--serd/serd.h10
-rw-r--r--src/world.c20
-rw-r--r--src/world.h2
-rw-r--r--tests/serd_test.c21
4 files changed, 52 insertions, 1 deletions
diff --git a/serd/serd.h b/serd/serd.h
index 6be31a2b..79cd53dc 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -749,6 +749,16 @@ void
serd_world_free(SerdWorld* world);
/**
+ Return a unique blank node.
+
+ The returned node is valid only until the next time serd_world_get_blank()
+ is called or the world is destroyed.
+*/
+SERD_API
+const SerdNode*
+serd_world_get_blank(SerdWorld* world);
+
+/**
Set a function to be called when errors occur.
The `error_sink` will be called with `handle` as its first argument. If
diff --git a/src/world.c b/src/world.c
index f95accf4..9908e4d4 100644
--- a/src/world.c
+++ b/src/world.c
@@ -18,6 +18,7 @@
#include "world.h"
+#include "node.h"
#include "serd_config.h"
#include <errno.h>
@@ -29,6 +30,8 @@
# include <fcntl.h>
#endif
+#define BLANK_CHARS 11
+
FILE*
serd_world_fopen(SerdWorld* world, const char* path, const char* mode)
{
@@ -71,15 +74,30 @@ 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_node_new_blank("b0000000000");
+
+ return world;
}
void
serd_world_free(SerdWorld* 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 = snprintf(
+ buf, BLANK_CHARS, "b%u", ++world->next_blank_id);
+ return world->blank_node;
+}
+
void
serd_world_set_error_sink(SerdWorld* world,
SerdErrorSink error_sink,
diff --git a/src/world.h b/src/world.h
index 85b676ee..99ef27b8 100644
--- a/src/world.h
+++ b/src/world.h
@@ -24,6 +24,8 @@
struct SerdWorldImpl {
SerdErrorSink error_sink;
void* error_handle;
+ uint32_t next_blank_id;
+ SerdNode* blank_node;
};
FILE* serd_world_fopen(SerdWorld* world, const char* path, const char* mode);
diff --git a/tests/serd_test.c b/tests/serd_test.c
index e8d535a3..dbadb5bf 100644
--- a/tests/serd_test.c
+++ b/tests/serd_test.c
@@ -123,6 +123,23 @@ check_rel_uri(const char* uri,
return ret;
}
+static int
+test_get_blank(void)
+{
+ SerdWorld* world = serd_world_new();
+ char expected[8];
+
+ for (unsigned i = 0; i < 32; ++i) {
+ const SerdNode* blank = serd_world_get_blank(world);
+
+ snprintf(expected, sizeof(expected), "b%u", i + 1);
+ assert(!strcmp(serd_node_get_string(blank), expected));
+ }
+
+ serd_world_free(world);
+ return 0;
+}
+
int
main(void)
{
@@ -379,6 +396,10 @@ main(void)
SerdWorld* world = serd_world_new();
+ if (test_get_blank()) {
+ return 1;
+ }
+
SerdNode* u = serd_node_new_uri("http://example.org/foo");
SerdNode* b = serd_node_new_curie("invalid");
SerdNode* c = serd_node_new_curie("eg.2:b");