76 lines
3.1 KiB
C
Executable File
76 lines
3.1 KiB
C
Executable File
/*===========================================================================
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FILE:
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CRC.h
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DESCRIPTION:
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16-bit LSB CRC computation/verification
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PUBLIC CLASSES AND METHODS:
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SetCRC()
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CheckCRC()
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CalculateCRC()
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Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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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 are met:
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* 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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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Code Aurora Forum nor
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the names of its contributors may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN 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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// Pragmas
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//---------------------------------------------------------------------------
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#pragma once
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//---------------------------------------------------------------------------
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// Definitions
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//---------------------------------------------------------------------------
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const USHORT CRC_16_L_POLYNOMIAL = 0x8408;
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const USHORT CRC_16_L_SEED = 0xFFFF;
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const USHORT CRC_16_L_OK = 0x0F47;
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const USHORT CRC_TABLE_SIZE = 256;
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const USHORT CRC_SIZE = 2;
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/*=========================================================================*/
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// Prototypes
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/*=========================================================================*/
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// Calculate and append a 16-bit CRC to given data, the calculated CRC
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// value stored at pData[dataLen] & pData[dataLen + 1]
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void SetCRC(
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PBYTE pData,
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ULONG dataLen );
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// Check a CRC value for the given data, dataLen includes the 2 byte CRC
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// value at the end of the buffer
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bool CheckCRC(
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const BYTE * pData,
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ULONG dataLen );
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// Calculate a CRC value for the given data
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USHORT CalculateCRC(
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const BYTE * pBuf,
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ULONG bitLen );
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