[gimp/metadata-wip-rebased] libgimpbase: add gimp_metadata_duplicate()

[Michael Natterer <mitch src gnome org>]

commit 8a19f00eba146f47bcd3afa67260163841914b83
Author: Michael Natterer <mitch gimp org>
Date:   Thu Oct 24 22:44:33 2013 +0200

    libgimpbase: add gimp_metadata_duplicate()

 libgimpbase/gimpbase.def   |    1 +
 libgimpbase/gimpmetadata.c |   19 +++++++++++++++++++
 libgimpbase/gimpmetadata.h |    1 +
 3 files changed, 21 insertions(+), 0 deletions(-)
---
diff --git a/libgimpbase/gimpbase.def b/libgimpbase/gimpbase.def
index 8355008..d2bfa5a 100644
--- a/libgimpbase/gimpbase.def
+++ b/libgimpbase/gimpbase.def
@@ -51,6 +51,7 @@ EXPORTS
        gimp_memsize_to_string
        gimp_message_handler_type_get_type
        gimp_metadata_deserialize
+       gimp_metadata_duplicate
        gimp_metadata_get_resolution
        gimp_metadata_is_tag_supported
        gimp_metadata_load_from_file
diff --git a/libgimpbase/gimpmetadata.c b/libgimpbase/gimpmetadata.c
index ce2a944..1139233 100644
--- a/libgimpbase/gimpmetadata.c
+++ b/libgimpbase/gimpmetadata.c
@@ -148,6 +148,25 @@ gimp_metadata_new (void)
   return metadata;
 }
 
+GimpMetadata *
+gimp_metadata_duplicate (GimpMetadata *metadata)
+{
+  GimpMetadata *new_metadata = NULL;
+
+  g_return_val_if_fail (metadata == NULL || GEXIV2_IS_METADATA (metadata), NULL);
+
+  if (metadata)
+    {
+      gchar *xml;
+
+      xml = gimp_metadata_serialize (metadata);
+      new_metadata = gimp_metadata_deserialize (xml);
+      g_free (xml);
+    }
+
+  return new_metadata;
+}
+
 typedef struct
 {
   gchar         name[1024];
diff --git a/libgimpbase/gimpmetadata.h b/libgimpbase/gimpmetadata.h
index 618d73b..ee9fa40 100644
--- a/libgimpbase/gimpmetadata.h
+++ b/libgimpbase/gimpmetadata.h
@@ -40,6 +40,7 @@ typedef enum
 
 
 GimpMetadata * gimp_metadata_new                 (void);
+GimpMetadata * gimp_metadata_duplicate           (GimpMetadata  *metadata);
 
 GimpMetadata * gimp_metadata_deserialize         (const gchar   *metadata_xml);
 gchar        * gimp_metadata_serialize           (GimpMetadata  *metadata);