From 78506bd604099161819ffdd0fdef98967f8980de Mon Sep 17 00:00:00 2001
From: Michael Natterer <mitch@gimp.org>
Date: Thu, 23 Aug 2012 09:28:13 +0200
Subject: [PATCH] quartz: add evil casting to make sure time wraps correctly on
 32bit machines

get_time_from_ns_event(): apply patch from Michael Hutchinson which
makes sure the returned guint32 wraps correctly on 32 bit machines
when the uptime exceeds 2^32 ms.
---
 gdk/quartz/gdkevents-quartz.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index 4921fcd510..0c4c240793 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -172,8 +172,11 @@ static guint32
 get_time_from_ns_event (NSEvent *event)
 {
   double time = [event timestamp];
-  
-  return time * 1000.0;
+
+  /* cast via double->uint64 conversion to make sure that it is
+   * wrapped on 32-bit machines when it overflows
+   */
+  return (guint32) (guint64) (time * 1000.0);
 }
 
 static int