/*---------------------------------------------------------------------------*
*
* BinkleyTerm
*
* (C) Copyright 1987-96, Bit Bucket Software Co.
* For license and contact information see /doc/orig_260/license.260.
*
* This version was modified by the BinkleyTerm XE Team.
* For contact information see /doc/team.lst and /doc/join.us.
* For a complete list of changes see /doc/xe_user.doc and /doc/xe_hist.doc.
*
* Filename : $Source: /cvsroot/btxe/btnt/sources/aglcrc.cpp,v $
* Revision : $Revision: 1.1 $
* Tagname : $Name: $
* Last updated: $Date: 2005/01/01 15:18:10 $
* State : $State: Exp $
* Orig. Author: Arjen Lentz, contributed by Michael Buenter
*
* Description : Hydra CRC calculations for BinkleyTerm
*
* Note :
*
* Routines for table driven CRC-16 & CRC-32, including building tables
* Refer to CRC.DOC for information and documentation.
*
* Information collected and edited by Arjen G. Lentz
* Sourcecode in C and 80x86 ASM written by Arjen G. Lentz
* COPYRIGHT (C) 1992-1993; ALL RIGHTS RESERVED
*
* CONTACT ADDRESS
*
* LENTZ SOFTWARE-DEVELOPMENT Arjen Lentz @
* Langegracht 7B AINEX-BBS +31-33-633916
* 3811 BT Amersfoort FidoNet 2:283/512
* The Netherlands arjen_lentz@f512.n283.z2.fidonet.org
*
* DISCLAIMER
*
* This information is provided "as is" and comes with no warranties of
* any kind, either expressed or implied. It's intended to be used by
* programmers and developers. In no event shall the author be liable to
* you or anyone else for any damages, including any lost profits, lost
* savings or other incidental or consequential damages arising out of the
* use or inability to use this information.
*
* LICENCE
*
* This package may be freely distributed provided the files remain
* together, in their original unmodified form.
* All files, executables and sourcecode remain the copyrighted property
* of Arjen G. Lentz and LENTZ SOFTWARE-DEVELOPMENT.
* Licence for any use granted, provided this notice & CRC.DOC are
* included. For executable applications, credit should be given in the
* appropriate places in the program and documentation.
* These notices must be retained in any copies of any part of this
* documentation and/or software.
*
* Any use of, or operation on (including copying/distributing) any of
* the above mentioned files implies full and unconditional acceptance of
* this licence and disclaimer.
*
*---------------------------------------------------------------------------*/
#include "includes.h"
#include "aglcrc.h"
/* ------------------------------------------------------------------------- */
void cdecl
crc16init (word FAR * crctab, word poly)
{
register word i, j;
register word crc;
for (i = 0; i <= 255; i++)
{
crc = i;
for (j = 8; j > 0; j--)
{
if (crc & 1)
crc = (word) ((crc >> 1) ^ poly);
else
crc >>= 1;
}
crctab[i] = crc;
}
} /*crc16init() */
/* ------------------------------------------------------------------------- */
word cdecl
crc16block (word FAR * crctab, word crc, byte FAR * buf, word len)
{
while (len--)
crc = (word) crc16upd (crctab, crc, *buf++);
return (crc);
} /*crc16block() */
/* ------------------------------------------------------------------------- */
/* TJW 960522 crc32init unnecessary because it generates same as cr3tab[] */
/* commented out ...
* void cdecl
* crc32init (ULONG FAR * crctab, ULONG poly)
* {
* register int i, j;
* register ULONG crc;
*
* for (i = 0; i <= 255; i++)
* {
* crc = i;
* for (j = 8; j > 0; j--)
* {
* if (crc & 1)
* crc = (crc >> 1) ^ poly;
* else
* crc >>= 1;
* }
* crctab[i] = crc;
* }
* }
* ...
*/
/* crc32init() */
/* ------------------------------------------------------------------------- */
ULONG cdecl
crc32block (ULONG FAR * crctab, ULONG crc, byte FAR * buf, word len)
{
while (len--)
crc = crc32upd (crctab, crc, *buf++);
return (crc);
} /*crc32block() */
/* $Id: aglcrc.cpp,v 1.1 2005/01/01 15:18:10 vildanov Exp $ */
