lfsr.h revision 40f53fa8d9c6a4fc38c0014495e7a42b08f52481
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * Copyright (C) 1999, 2000 Internet Software Consortium.
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * Permission to use, copy, modify, and distribute this software for any
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * purpose with or without fee is hereby granted, provided that the above
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * copyright notice and this permission notice appear in all copies.
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews/* $Id: lfsr.h,v 1.8 2000/08/01 01:30:20 tale Exp $ */
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * This function is called when reseeding is needed. It is allowed to
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * modify any state in the LFSR in any way it sees fit OTHER THAN "bits".
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * It MUST set "count" to a new value or the lfsr will never reseed again.
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * Also, a reseed will never occur in the middle of an extraction. This
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * is purely an optimization, and is probably what one would want.
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrewstypedef void (*isc_lfsrreseed_t)(isc_lfsr_t *, void *);
7867d18ce0ffa93055fbda3b9d2be8b168d898fcMark Andrews * The members of this structure can be used by the application, but care
343aeac7176d28c4a1b9d246b1f7311b4cd5da7dFrancis Dupont * needs to be taken to not change state once the lfsr is in operation.