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diff --git a/nx-X11/programs/Xserver/hw/darwin/quartz/xpr/x-hook.c b/nx-X11/programs/Xserver/hw/darwin/quartz/xpr/x-hook.c
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+/* x-hook.c
+ $Id: x-hook.c,v 1.3 2005/07/01 22:43:08 daniels Exp $
+
+ Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
+ HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS IN THE SOFTWARE.
+
+ Except as contained in this notice, the name(s) of the above
+ copyright holders shall not be used in advertising or otherwise to
+ promote the sale, use or other dealings in this Software without
+ prior written authorization. */
+/* $XFree86: $ */
+
+#include "x-hook.h"
+#include <stdlib.h>
+#include <assert.h>
+
+#define CELL_NEW(f,d) X_PFX (list_prepend) ((x_list *) (f), (d))
+#define CELL_FREE(c) X_PFX (list_free_1) (c)
+#define CELL_FUN(c) ((x_hook_function *) ((c)->next))
+#define CELL_DATA(c) ((c)->data)
+
+X_EXTERN x_list *
+X_PFX (hook_add) (x_list *lst, x_hook_function *fun, void *data)
+{
+ return X_PFX (list_prepend) (lst, CELL_NEW (fun, data));
+}
+
+X_EXTERN x_list *
+X_PFX (hook_remove) (x_list *lst, x_hook_function *fun, void *data)
+{
+ x_list *node, *cell;
+ x_list *to_delete = NULL;
+
+ for (node = lst; node != NULL; node = node->next)
+ {
+ cell = node->data;
+ if (CELL_FUN (cell) == fun && CELL_DATA (cell) == data)
+ to_delete = X_PFX (list_prepend) (to_delete, cell);
+ }
+
+ for (node = to_delete; node != NULL; node = node->next)
+ {
+ cell = node->data;
+ lst = X_PFX (list_remove) (lst, cell);
+ CELL_FREE (cell);
+ }
+
+ X_PFX (list_free) (to_delete);
+}
+
+X_EXTERN void
+X_PFX (hook_run) (x_list *lst, void *arg)
+{
+ x_list *node, *cell;
+ x_hook_function **fun;
+ void **data;
+ int length, i;
+
+ length = X_PFX (list_length) (lst);
+ fun = alloca (sizeof (x_hook_function *) * length);
+ data = alloca (sizeof (void *) * length);
+
+ for (i = 0, node = lst; node != NULL; node = node->next, i++)
+ {
+ cell = node->data;
+ fun[i] = CELL_FUN (cell);
+ data[i] = CELL_DATA (cell);
+ }
+
+ for (i = 0; i < length; i++)
+ {
+ (*fun[i]) (arg, data[i]);
+ }
+}
+
+X_EXTERN void
+X_PFX (hook_free) (x_list *lst)
+{
+ x_list *node;
+
+ for (node = lst; node != NULL; node = node->next)
+ {
+ CELL_FREE (node->data);
+ }
+
+ X_PFX (list_free) (lst);
+}