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

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