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110 lines
4.1 KiB
C
110 lines
4.1 KiB
C
/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2008 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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/**********************************************************************
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*
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* Filename: crc.h
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*
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* Description: A header file describing the various CRC standards.
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*
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* Notes:
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*
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*
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* Copyright (c) 2000 by Michael Barr. This software is placed into
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* the public domain and may be used for any purpose. However, this
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* notice must not be changed or removed and no warranty is either
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* expressed or implied by its publication or distribution.
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**********************************************************************/
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#ifndef _crc_h
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#define _crc_h
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#define FALSE 0
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#define TRUE !FALSE
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/*
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* Select the CRC standard from the list that follows.
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*/
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#define CRC32
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#if defined(CRC_CCITT)
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typedef unsigned short crc;
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#define CRC_NAME "CRC-CCITT"
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#define POLYNOMIAL 0x1021
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#define INITIAL_REMAINDER 0xFFFF
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#define FINAL_XOR_VALUE 0x0000
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#define REFLECT_DATA FALSE
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#define REFLECT_REMAINDER FALSE
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#define CHECK_VALUE 0x29B1
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#elif defined(CRC16)
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typedef unsigned short crc;
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#define CRC_NAME "CRC-16"
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#define POLYNOMIAL 0x8005
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#define INITIAL_REMAINDER 0x0000
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#define FINAL_XOR_VALUE 0x0000
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#define REFLECT_DATA TRUE
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#define REFLECT_REMAINDER TRUE
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#define CHECK_VALUE 0xBB3D
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#elif defined(CRC32)
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typedef unsigned long crc;
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#define CRC_NAME "CRC-32"
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#define POLYNOMIAL 0x04C11DB7
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#define INITIAL_REMAINDER 0xFFFFFFFF
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#define FINAL_XOR_VALUE 0xFFFFFFFF
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#define REFLECT_DATA TRUE
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#define REFLECT_REMAINDER TRUE
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#define CHECK_VALUE 0xCBF43926
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#else
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#error "One of CRC_CCITT, CRC16, or CRC32 must be #define'd."
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#endif
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void crcInit(void);
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crc crcSlow(unsigned char const message[], int nBytes);
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crc crcFast(unsigned char const message[], int nBytes);
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#endif /* _crc_h */
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