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