xnu-201.tar.gz

[apple/xnu.git] / bsd / dev / random / YarrowCoreLib / src / yarrowUtils.c

diff --git a/bsd/dev/random/YarrowCoreLib/src/yarrowUtils.c b/bsd/dev/random/YarrowCoreLib/src/yarrowUtils.c
new file mode 100644 (file)
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+++ b/bsd/dev/random/YarrowCoreLib/src/yarrowUtils.c
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+/*
+ * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*
+       File:           yarrowUtils.c
+
+       Contains:       Misc. utility functions.
+
+       Written by:     Doug Mitchell
+
+       Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
+
+       Change History (most recent first):
+
+               02/29/00        dpm             Created.
+ 
+*/
+
+#include "dev/random/YarrowCoreLib/include/yarrowUtils.h"
+
+void 
+trashMemory(void* mem, int len)
+/* This function should only be used on data in RAM */
+{
+       if(len == 0) {
+               /* some memsets really don't like this */
+               return;
+       }
+       
+       /* Cycle a bit just in case it is one of those weird memory units */
+       /* No, I don't know which units those would be */
+       memset(mem,0x00,len);
+       memset(mem,0xFF,len);
+       memset(mem,0x00,len);
+}
+
+