diff -r 000000000000 -r e9f7ba4718e1 Source/GGBUtils.m
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/GGBUtils.m	Fri Mar 07 11:43:02 2008 -0800
@@ -0,0 +1,38 @@
+/*  Copyright © 2008 Jens Alfke. All Rights Reserved.
+
+    Redistribution and use in source and binary forms, with or without modification, are permitted
+    provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions
+      and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of
+      conditions and the following disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
+    FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
+    BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#import "GGBUtils.h"
+
+
+void setObj( id *variable, id newValue )
+{
+    if( *variable != newValue ) {
+        [*variable release];
+        *variable = [newValue retain];
+    }
+}
+
+void setObjCopy( id<NSCopying> *variable, id<NSCopying> newValue )
+{
+    if( *variable != newValue ) {
+        [*variable release];
+        *variable = [(id)newValue copy];
+    }
+}