[gupnp-av/wip/didl-lite-fragments] wip: allow overriding the path to datadir by envvar.

[Krzesimir Nowak <krnowak src gnome org>]

commit 08d27ff1da89c4f73e6c9d75c250b89c52904f5c
Author: Krzesimir Nowak <krnowak openismus com>
Date:   Thu Oct 18 13:17:13 2012 +0200

    wip: allow overriding the path to datadir by envvar.

 libgupnp-av/gupnp-didl-lite-object.c |   29 ++++++++++++++++++++++++++---
 1 files changed, 26 insertions(+), 3 deletions(-)
---
diff --git a/libgupnp-av/gupnp-didl-lite-object.c b/libgupnp-av/gupnp-didl-lite-object.c
index 8575728..a376179 100644
--- a/libgupnp-av/gupnp-didl-lite-object.c
+++ b/libgupnp-av/gupnp-didl-lite-object.c
@@ -2910,6 +2910,31 @@ apply_modification (GUPnPXMLDoc *doc,
         xmlFreeDoc (original_doc);
 }
 
+static const gchar *
+get_data_dir (void)
+{
+        const gchar *datadir = g_getenv ("GUPNP_AV_DATADIR");
+
+        if (!datadir)
+                /* that's a macro defined by -DDATADIR=foo */
+                datadir = DATADIR;
+
+        return datadir;
+}
+
+XSDValidateData *
+get_xsd_validate_data (void)
+{
+        gchar *path = g_strdup_printf
+                                     ("%s" G_DIR_SEPARATOR_S "didl-lite-v2.xsd",
+                                      get_data_dir ());
+        XSDValidateData *vdata = xsd_validate_data_new (path);
+
+        g_free (path);
+
+        return vdata;
+}
+
 GUPnPDIDLLiteFragmentResult
 gupnp_didl_lite_object_apply_fragments (GUPnPDIDLLiteObject *object,
                                         GList               *current_fragments,
@@ -2920,9 +2945,7 @@ gupnp_didl_lite_object_apply_fragments (GUPnPDIDLLiteObject *object,
         GUPnPDIDLLiteFragmentResult result;
         GList *current_iter;
         GList *new_iter;
-        XSDValidateData *vdata = xsd_validate_data_new (DATADIR
-                                                        G_DIR_SEPARATOR_S
-                                                        "didl-lite-v2.xsd");
+        XSDValidateData *vdata = get_xsd_validate_data ();
 
         g_return_val_if_fail (GUPNP_IS_DIDL_LITE_OBJECT (object),
                               GUPNP_DIDL_LITE_FRAGMENT_RESULT_UNKNOWN_ERROR);