100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/****************************************************************************
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* include/nuttx/crc16.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_CRC16_H
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#define __INCLUDE_NUTTX_CRC16_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Append full suffix to avoid the penitential symbol collision */
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#define crc16 crc16full
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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: crc16part
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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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uint16_t crc16part(FAR const uint8_t *src, size_t len, uint16_t crc16val);
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/****************************************************************************
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* Name: crc16
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*
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* Description:
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* Return a 16-bit CRC of the contents of the 'src' buffer, length 'len'
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*
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****************************************************************************/
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uint16_t crc16(FAR const uint8_t *src, size_t len);
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/****************************************************************************
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* Name: crc16ccittpart
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*
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* Description:
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* Continue 16-bit CRC-CCITT calculation on a part of the buffer using the
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* polynomial x^16+x^12+x^5+1.
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*
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****************************************************************************/
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uint16_t crc16ccittpart(FAR const uint8_t *src, size_t len,
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uint16_t crc16val);
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/****************************************************************************
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* Name: crc16ccitt
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*
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* Description:
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* Return a 16-bit CRC-CCITT of the contents of the 'src' buffer, length
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* 'len' using the polynomial x^16+x^12+x^5+1.
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*
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****************************************************************************/
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uint16_t crc16ccitt(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 /* __INCLUDE_NUTTX_CRC16_H */
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