1 files changed, 41 insertions, 0 deletions
diff --git a/src/util/support/zap.c b/src/util/support/zap.c
new file mode 100644
index 000000000000..ed31630db1b9
--- /dev/null
+++ b/src/util/support/zap.c
@@ -0,0 +1,41 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* util/support/zap.c */
+/*
+ * Copyright 2009 Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/*
+ * krb5int_zap() is used by zap() (a static inline function defined in
+ * k5-int.h) on non-Windows, non-gcc compilers, in order to prevent the
+ * compiler from inlining and optimizing out the memset() call.
+ */
+
+#include <k5-platform.h>
+
+void krb5int_zap(void *ptr, size_t len)
+{
+    volatile char *p = ptr;
+
+    while (len--)
+        *p++ = '\0';
+}