bsd/dev/random/YarrowCoreLib/src/yarrowUtils.c

   1 /*
   2  * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30
  31 /*
  32         File:           yarrowUtils.c
  33
  34         Contains:       Misc. utility functions.
  35
  36         Written by:     Doug Mitchell
  37
  38         Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
  39
  40         Change History (most recent first):
  41
  42                 02/29/00        dpm             Created.
  43
  44 */
  45
  46 #include "dev/random/YarrowCoreLib/include/yarrowUtils.h"
  47 #include <string.h>
  48
  49 void
  50 trashMemory(void* mem, int len)
  51 /* This function should only be used on data in RAM */
  52 {
  53         if(len == 0) {
  54                 /* some memsets really don't like this */
  55                 return;
  56         }
  57
  58         /* Cycle a bit just in case it is one of those weird memory units */
  59         /* No, I don't know which units those would be */
  60         memset(mem,0x00,len);
  61         memset(mem,0xFF,len);
  62         memset(mem,0x00,len);
  63 }
  64
  65