From 36c22be51af07fc96a9168684949b82b8f6e325c Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 10 Feb 2013 08:56:33 +0000
Subject: Add lilv_world_ask() for easily checking if a statement exists. Add
lilv_world_get() and lilv_port_get() for easily getting one value.
git-svn-id: http://svn.drobilla.net/lad/trunk/lilv@5053 a436a847-0d15-0410-975c-d299462d15a1
---
src/node.c | 4 ++++
src/port.c | 15 +++++++++++++++
src/world.c | 16 ++++++++++++++++
3 files changed, 35 insertions(+)
(limited to 'src')
diff --git a/src/node.c b/src/node.c
index 495bb49..7b22873 100644
--- a/src/node.c
+++ b/src/node.c
@@ -92,6 +92,10 @@ lilv_node_new(LilvWorld* world, LilvNodeType type, const char* str)
LilvNode*
lilv_node_new_from_node(LilvWorld* world, const SordNode* node)
{
+ if (!node) {
+ return NULL;
+ }
+
LilvNode* result = NULL;
SordNode* datatype_uri = NULL;
LilvNodeType type = LILV_VALUE_STRING;
diff --git a/src/port.c b/src/port.c
index 00896df..48d87dd 100644
--- a/src/port.c
+++ b/src/port.c
@@ -126,6 +126,21 @@ lilv_port_get_value(const LilvPlugin* p,
lilv_node_as_node(predicate));
}
+LILV_API
+LilvNode*
+lilv_port_get(const LilvPlugin* p,
+ const LilvPort* port,
+ const LilvNode* predicate)
+{
+ LilvNodes* values = lilv_port_get_value(p, port, predicate);
+
+ LilvNode* value = lilv_node_duplicate(
+ values ? lilv_nodes_get_first(values) : NULL);
+
+ lilv_nodes_free(values);
+ return value;
+}
+
LILV_API
uint32_t
lilv_port_get_index(const LilvPlugin* p,
diff --git a/src/world.c b/src/world.c
index a3f59ed..147690b 100644
--- a/src/world.c
+++ b/src/world.c
@@ -201,6 +201,22 @@ lilv_world_find_nodes(LilvWorld* world,
object ? object->node : NULL);
}
+LILV_API
+LilvNode*
+lilv_world_get(LilvWorld* world,
+ const LilvNode* subject,
+ const LilvNode* predicate,
+ const LilvNode* object)
+{
+ return lilv_node_new_from_node(
+ world,
+ sord_get(world->model,
+ subject ? subject->node : NULL,
+ predicate ? predicate->node : NULL,
+ object ? object->node : NULL,
+ NULL));
+}
+
SordIter*
lilv_world_query_internal(LilvWorld* world,
const SordNode* subject,
--
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