[gmime] Added g_mime_references_copy and registered GMimeReferences as a boxed type

[Jeffrey Stedfast <fejj src gnome org>]

commit 38e16ee6701750658a0f6157b1b9f8f702075357
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Sun Feb 12 11:00:24 2017 -0500

    Added g_mime_references_copy and registered GMimeReferences as a boxed type

 gmime/gmime-utils.c |   33 +++++++++++++++++++++++++++++++++
 gmime/gmime-utils.h |    1 +
 gmime/gmime.c       |    4 ++++
 3 files changed, 38 insertions(+), 0 deletions(-)
---
diff --git a/gmime/gmime-utils.c b/gmime/gmime-utils.c
index b7f413d..eb0d1f0 100644
--- a/gmime/gmime-utils.c
+++ b/gmime/gmime-utils.c
@@ -1055,6 +1055,39 @@ g_mime_references_decode (const char *text)
 
 
 /**
+ * g_mime_references_copy:
+ * @references: the list of references to copy
+ *
+ * Copies a #GMimeReferences linked list.
+ *
+ * Returns: a newly allocated linked list that contains
+ * an identical list of items as @references.
+ **/
+GMimeReferences *
+g_mime_references_copy (GMimeReferences *references)
+{
+       GMimeReferences *ref, *node, *copy = NULL;
+       
+       ref = references;
+       while (ref != NULL) {
+               if (copy == NULL) {
+                       copy = node = g_new (GMimeReferences, 1);
+               } else {
+                       node->next = g_new (GMimeReferences, 1);
+                       node = node->next;
+               }
+               
+               node->msgid = g_strdup (ref->msgid);
+               node->next = NULL;
+               
+               ref = ref->next;
+       }
+       
+       return copy;
+}
+
+
+/**
  * g_mime_references_append:
  * @refs: the address of a #GMimeReferences list
  * @msgid: a message-id string
diff --git a/gmime/gmime-utils.h b/gmime/gmime-utils.h
index f6b808f..4f0a8d3 100644
--- a/gmime/gmime-utils.h
+++ b/gmime/gmime-utils.h
@@ -57,6 +57,7 @@ char *g_mime_utils_decode_message_id (const char *message_id);
 
 /* decode a References or In-Reply-To header */
 GMimeReferences *g_mime_references_decode (const char *text);
+GMimeReferences *g_mime_references_copy (GMimeReferences *references);
 void g_mime_references_append (GMimeReferences **refs, const char *msgid);
 void g_mime_references_clear (GMimeReferences **refs);
 void g_mime_references_free (GMimeReferences *refs);
diff --git a/gmime/gmime.c b/gmime/gmime.c
index 18a29b3..63ba849 100644
--- a/gmime/gmime.c
+++ b/gmime/gmime.c
@@ -128,6 +128,10 @@ g_mime_init (void)
        gmime_gpgme_error_quark = g_quark_from_static_string ("gmime-gpgme");
        gmime_error_quark = g_quark_from_static_string ("gmime");
        
+       g_boxed_type_register_static ("GMimeReferences",
+                                     (GBoxedCopyFunc) g_mime_references_copy,
+                                     (GBoxedFreeFunc) g_mime_references_free);
+       
        /* register our GObject types with the GType system */
        g_mime_crypto_context_get_type ();
        g_mime_decrypt_result_get_type ();