crcutils.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <string.h>
#include <limits.h>
#include "crcmodel.h"
#if defined(LITTLE_ENDIAN)
/* Little-endian architectures need byte-swapping. */
#define swap_short(x) (x = sws(x))
#else /* if !LITTLE_ENDIAN */
/* Big-endian anchictectures don't need byte-swapping. */
#define sws(x) (x)
#define swl(x) (x)
#define swap_short(x) (x = sws(x))
#endif /* LITTLE_ENDIAN */
unsigned char
{
int i;
unsigned char aCRC;
for (i = 0; i < length; i++) {
}
return (aCRC);
}
{
int i;
for (i = 0; i < length; i++) {
}
return (aCRC);
}
/*
* This is the max value an uint32_t value can hold...
* Define this for Windows compilers which don't have "limits.h" or equivalant
*/
#define UINT32_T_MAX 0xFFFFFFFF
{
int i, j, k;
/* Grab bytes in 4-byte chunks */
/* Grab chunk as an int */
regval = 0;
}
/* Add intval to regval */
regval += next4bytes;
}
/* Grab any remaining bytes at the end */
}
/*
* Treat any remaining bytes put into tailbytes as if they were
* a left-zero-padded unsigned int (uint32_t == 4 bytes!)
*/
regval = 0;
}
regval += next4bytes;
}