--- gsf-output-memory.c.orig	2019-10-14 10:28:11.549673629 -0400
+++ gsf-output-memory.c	2019-10-14 13:19:51.103063501 -0400
@@ -197,6 +197,26 @@
 	return mem->buffer;
 }
 
+/**
+ * gsf_output_memory_steal_bytes:
+ * @mem: the output device.
+ *
+ * Returns: (array) (nullable): The data that has been written to @mem.
+ * The caller takes ownership and the buffer belonging to @mem is set
+ * to %NULL.
+ **/
+guint8 *
+gsf_output_memory_steal_bytes (GsfOutputMemory * mem)
+{
+	guint8 *bytes;
+	
+	g_return_val_if_fail (mem != NULL, NULL);
+	bytes = mem->buffer;
+	mem->buffer = NULL;
+	mem->capacity = 0;
+	return bytes;
+}
+
 GSF_CLASS (GsfOutputMemory, gsf_output_memory,
 	   gsf_output_memory_class_init, gsf_output_memory_init,
 	   GSF_OUTPUT_TYPE)
--- gsf-output-memory.h.orig	2019-10-14 10:28:11.549673629 -0400
+++ gsf-output-memory.h	2019-10-14 10:30:49.919674526 -0400
@@ -38,6 +38,7 @@
 
 GsfOutput *gsf_output_memory_new      (void);
 const guint8* gsf_output_memory_get_bytes (GsfOutputMemory * mem);
+guint8* gsf_output_memory_steal_bytes (GsfOutputMemory * mem);
 
 G_END_DECLS