From d7c6f1d025cb7b03a7d44625827a7e852df23e0e Mon Sep 17 00:00:00 2001
From: defanor <defanor@uberspace.net>
Date: Fri, 23 Feb 2018 18:32:30 +0300
Subject: Fix Literal value datatype URI handling

It should be an URI, not a string.
---
 Redland/MidLevel.hs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'Redland/MidLevel.hs')

diff --git a/Redland/MidLevel.hs b/Redland/MidLevel.hs
index c8e9aa6..e9f1993 100644
--- a/Redland/MidLevel.hs
+++ b/Redland/MidLevel.hs
@@ -289,10 +289,14 @@ nodeGetLiteralValueLanguage node =
   withForeignPtr node $
   librdf_node_get_literal_value_language >=> maybeSharedCString
 
-nodeGetLiteralValueDatatypeURI :: ForeignPtr RedlandNode -> IO (Maybe String)
+nodeGetLiteralValueDatatypeURI :: ForeignPtr RedlandNode
+                               -> IO (Maybe (ForeignPtr RedlandURI))
 nodeGetLiteralValueDatatypeURI node =
-  withForeignPtr node $
-  librdf_node_get_literal_value_datatype_uri >=> maybeSharedCString
+  withForeignPtr node $ \node' -> do
+  oldURI <- librdf_node_get_literal_value_datatype_uri node'
+  if oldURI == nullPtr
+    then pure Nothing
+    else Just <$> initialize (librdf_new_uri_from_uri oldURI) p_librdf_free_uri
 
 nodeGetLiteralValueIsWellFormedXML :: ForeignPtr RedlandNode -> IO Bool
 nodeGetLiteralValueIsWellFormedXML node =
-- 
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