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/*******************************************************************************
* $Id: crc.h,v 1.1.1.7 2005/03/07 07:31:12 kanki Exp $
* Copyright 2005, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
* crc.h - a function to compute crc for iLine10 headers
******************************************************************************/
#ifndef _RTS_CRC_H_
#define _RTS_CRC_H_ 1
#include "typedefs.h"
#ifdef __cplusplus
extern "C" {
#endif
#define CRC8_INIT_VALUE 0xff /* Initial CRC8 checksum value */
#define CRC8_GOOD_VALUE 0x9f /* Good final CRC8 checksum value */
#define HCS_GOOD_VALUE 0x39 /* Good final header checksum value */
#define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */
#define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */
#define CRC32_INIT_VALUE 0xffffffff /* Initial CRC32 checksum value */
#define CRC32_GOOD_VALUE 0xdebb20e3 /* Good final CRC32 checksum value */
void hcs(uint8 *, uint);
uint8 crc8(uint8 *, uint, uint8);
uint16 crc16(uint8 *, uint, uint16);
uint32 crc32(uint8 *, uint, uint32);
/* macros for common usage */
#define APPEND_CRC8(pbytes, nbytes) \
do { \
uint8 tmp = crc8(pbytes, nbytes, CRC8_INIT_VALUE) ^ 0xff; \
(pbytes)[(nbytes)] = tmp; \
(nbytes) += 1; \
} while (0)
#define APPEND_CRC16(pbytes, nbytes) \
do { \
uint16 tmp = crc16(pbytes, nbytes, CRC16_INIT_VALUE) ^ 0xffff; \
(pbytes)[(nbytes) + 0] = (tmp >> 0) & 0xff; \
(pbytes)[(nbytes) + 1] = (tmp >> 8) & 0xff; \
(nbytes) += 2; \
} while (0)
#define APPEND_CRC32(pbytes, nbytes) \
do { \
uint32 tmp = crc32(pbytes, nbytes, CRC32_INIT_VALUE) ^ 0xffffffff; \
(pbytes)[(nbytes) + 0] = (tmp >> 0) & 0xff; \
(pbytes)[(nbytes) + 1] = (tmp >> 8) & 0xff; \
(pbytes)[(nbytes) + 2] = (tmp >> 16) & 0xff; \
(pbytes)[(nbytes) + 3] = (tmp >> 24) & 0xff; \
(nbytes) += 4; \
} while (0)
#ifdef __cplusplus
}
#endif
#endif /* _RTS_CRC_H_ */
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