[glib] GDBusMessage: Make endianness for D-Bus messages match host byte order

[David Zeuthen <davidz src gnome org>]

commit 14e37ef7967a2da594faaab24fe2c9c117cf099f
Author: David Zeuthen <davidz redhat com>
Date:   Wed Jul 14 11:39:22 2010 -0400

    GDBusMessage: Make endianness for D-Bus messages match host byte order
    
    Signed-off-by: David Zeuthen <davidz redhat com>

 gio/gdbusmessage.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/gio/gdbusmessage.c b/gio/gdbusmessage.c
index 412c983..32668d0 100644
--- a/gio/gdbusmessage.c
+++ b/gio/gdbusmessage.c
@@ -1945,8 +1945,18 @@ g_dbus_message_to_blob (GDBusMessage          *message,
   mos = G_MEMORY_OUTPUT_STREAM (g_memory_output_stream_new (NULL, 0, g_realloc, g_free));
   dos = g_data_output_stream_new (G_OUTPUT_STREAM (mos));
 
-  /* TODO: detect endianess... */
+  /* Any D-Bus implementation is supposed to handle both Big and
+   * Little Endian encodings and the Endianness is part of the D-Bus
+   * message - we prefer to use Big Endian (since it's Network Byte
+   * Order and just easier to read for humans) but if the machine is
+   * Little Endian we use that for performance reasons.
+   */
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
   byte_order = G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN;
+#else
+  /* this could also be G_PDP_ENDIAN */
+  byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
+#endif
   g_data_output_stream_set_byte_order (dos, byte_order);
 
   /* Core header */