Add lilv_world_ask() for simply checking if a statement exists.

git-svn-id: http://svn.drobilla.net/lad/trunk/lilv@4862 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 17 insertions, 0 deletions

diff --git a/lilv/lilv.h b/lilv/lilv.h
index 1d05883..52e3576 100644
--- a/lilv/lilv.h
+++ b/lilv/lilv.h
@@ -650,6 +650,23 @@ lilv_world_find_nodes(LilvWorld*      world,
                       const LilvNode* object);
 
 /**
+   Return true iff a statement matching a certain pattern exists.
+
+   This is useful for checking if particular statement exists without having to
+   bother with collections and memory management.
+
+   @param subject Subject of statement, or NULL for anything.
+   @param predicate Predicate (key) of statement, or NULL for anything.
+   @param object Object (value) of statement, or NULL for anything.
+*/
+LILV_API
+bool
+lilv_world_ask(LilvWorld*      world,
+               const LilvNode* subject,
+               const LilvNode* predicate,
+               const LilvNode* object);
+
+/**
    @}
    @name Plugin
    @{