110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
/****************************************************************************
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* include/crc64.h
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*
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* Copyright (C) 2016 Omni Hoverboards Inc. All rights reserved.
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* Author: Paul Alexander Patience <paul-a.patience@polymtl.ca>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_CRC64_H
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#define __INCLUDE_CRC64_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#ifdef CONFIG_HAVE_LONG_LONG
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* CRC64_CHECK is the CRC64 of the string "123456789" without the null byte.
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*
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* const uint8_t checkbuf[] =
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* {
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* '1', '2', '3', '4', '5', '6', '7', '8', '9'
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* };
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*
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* assert(crc64(checkbuf, sizeof(checkbuf)) == CRC64_CHECK);
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*/
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/* CRC-64/WE */
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#define CRC64_POLY ((uint64_t)0x42f0e1eba9ea3693ull)
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#define CRC64_INIT ((uint64_t)0xffffffffffffffffull)
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#define CRC64_XOROUT ((uint64_t)0xffffffffffffffffull)
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#define CRC64_CHECK ((uint64_t)0x62ec59e3f1a4f00aull)
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: crc64part
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*
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* Description:
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* Continue CRC calculation on a part of the buffer.
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*
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****************************************************************************/
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uint64_t crc64part(FAR const uint8_t *src, size_t len, uint64_t crc64val);
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/****************************************************************************
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* Name: crc64
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*
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* Description:
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* Return a 64-bit CRC of the contents of the 'src' buffer, length 'len'.
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*
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****************************************************************************/
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uint64_t crc64(FAR const uint8_t *src, size_t len);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_HAVE_LONG_LONG */
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#endif /* __INCLUDE_CRC64_H */
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