70 lines
2.8 KiB
C
70 lines
2.8 KiB
C
/*******************************************************************************
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* $Id$
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* Copyright 2004, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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* crc.h - a function to compute crc for iLine10 headers
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******************************************************************************/
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#ifndef _RTS_CRC_H_
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#define _RTS_CRC_H_ 1
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#include "typedefs.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CRC8_INIT_VALUE 0xff /* Initial CRC8 checksum value */
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#define CRC8_GOOD_VALUE 0x9f /* Good final CRC8 checksum value */
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#define HCS_GOOD_VALUE 0x39 /* Good final header checksum value */
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#define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */
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#define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */
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#define CRC32_INIT_VALUE 0xffffffff /* Initial CRC32 checksum value */
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#define CRC32_GOOD_VALUE 0xdebb20e3 /* Good final CRC32 checksum value */
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void hcs(uint8 *, uint);
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uint8 crc8(uint8 *, uint, uint8);
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uint16 crc16(uint8 *, uint, uint16);
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uint32 crc32(uint8 *, uint, uint32);
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/* macros for common usage */
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#define APPEND_CRC8(pbytes, nbytes) \
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do { \
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uint8 tmp = crc8(pbytes, nbytes, CRC8_INIT_VALUE) ^ 0xff; \
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(pbytes)[(nbytes)] = tmp; \
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(nbytes) += 1; \
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} while (0)
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#define APPEND_CRC16(pbytes, nbytes) \
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do { \
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uint16 tmp = crc16(pbytes, nbytes, CRC16_INIT_VALUE) ^ 0xffff; \
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(pbytes)[(nbytes) + 0] = (tmp >> 0) & 0xff; \
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(pbytes)[(nbytes) + 1] = (tmp >> 8) & 0xff; \
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(nbytes) += 2; \
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} while (0)
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#define APPEND_CRC32(pbytes, nbytes) \
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do { \
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uint32 tmp = crc32(pbytes, nbytes, CRC32_INIT_VALUE) ^ 0xffffffff; \
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(pbytes)[(nbytes) + 0] = (tmp >> 0) & 0xff; \
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(pbytes)[(nbytes) + 1] = (tmp >> 8) & 0xff; \
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(pbytes)[(nbytes) + 2] = (tmp >> 16) & 0xff; \
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(pbytes)[(nbytes) + 3] = (tmp >> 24) & 0xff; \
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(nbytes) += 4; \
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} while (0)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTS_CRC_H_ */
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