1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* util/support/zap.c */
3 /*
4 * Copyright 2009 Massachusetts Institute of Technology.
5 * All Rights Reserved.
6 *
7 * Export of this software from the United States of America may
8 * require a specific license from the United States Government.
9 * It is the responsibility of any person or organization contemplating
10 * export to obtain such a license before exporting.
11 *
12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13 * distribute this software and its documentation for any purpose and
14 * without fee is hereby granted, provided that the above copyright
15 * notice appear in all copies and that both that copyright notice and
16 * this permission notice appear in supporting documentation, and that
17 * the name of M.I.T. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission. Furthermore if you modify this software you must label
20 * your software as modified software and not distribute it in such a
21 * fashion that it might be confused with the original M.I.T. software.
22 * M.I.T. makes no representations about the suitability of
23 * this software for any purpose. It is provided "as is" without express
24 * or implied warranty.
25 */
26
27 /*
28 * krb5int_zap() is used by zap() (a macro or static inline function defined in
29 * k5-platform.h) on non-Windows, non-gcc compilers, in order to prevent the
30 * compiler from inlining and optimizing out the memset() call.
31 */
32
33 #include <k5-platform.h>
34
krb5int_zap(void * ptr,size_t len)35 void krb5int_zap(void *ptr, size_t len)
36 {
37 volatile char *p = ptr;
38
39 while (len--)
40 *p++ = '\0';
41 }
42