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-/*
- * Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
- *
- * This software may be freely used, copied, modified, and distributed
- * provided that the above copyright notice is preserved in all copies of the
- * software.
- */
-
-/* -*-C-*-
- *
- * $Revision$
- * $Date$
- *
- *
- * crc.h - describes some "standard" CRC calculation routines.
- */
-#ifndef angel_crc_h
-#define angel_crc_h
-
-/*
- * manifests
- */
-
-/*
- * When using "crc32" or "crc16" these initial CRC values must be given to
- * the respective function the first time it is called. The function can
- * then be called with the return value from the last call of the function
- * to generate a running CRC over multiple data blocks.
- * When the last data block has been processed using the "crc32" algorithm
- * the CRC value should be inverted to produce the final CRC value:
- * e.g. CRC = ~CRC
- */
-
-#define startCRC32 (0xFFFFFFFF) /* CRC initialised to all 1s */
-#define startCRC16 (0x0000) /* CRC initialised to all 0s */
-
-/*
- * For the CRC-32 residual to be calculated correctly requires that the CRC
- * value is in memory little-endian due to the byte read, bit-ordering
- * nature of the algorithm.
- */
-#define CRC32residual (0xDEBB20E3) /* good CRC-32 residual */
-
-
-/**********************************************************************/
-
-/*
- * exported functions
- */
-
-/*
- * Function: crc32
- * Purpose: Provides a table driven implementation of the IEEE-802.3
- * 32-bit CRC algorithm for byte data.
- *
- * Params:
- * Input: address pointer to the byte data
- * size number of bytes of data to be processed
- * crc initial CRC value to be used (can be the output
- * from a previous call to this function).
- * Returns:
- * OK: 32-bit CRC value for the specified data
- */
-extern unsigned int crc32(unsigned char *address, unsigned int size,
- unsigned int crc);
-
-/**********************************************************************/
-
-/*
- *
- * Function: crc16
- * Purpose: Generates a table driven 16-bit CRC-CCITT for byte data
- *
- * Params:
- * Input: address pointer to the byte data
- * size number of bytes of data to be processed
- * crc initial CRC value to be used (can be the output
- * from a previous call to this function).
- *
- * Returns:
- * OK: 16-bit CRC value for the specified data
- */
-extern unsigned short crc16(unsigned char *address, unsigned int size,
- unsigned short crc);
-
-/**********************************************************************/
-
-#endif /* !defined(angel_crc_h) */
-
-/* EOF crc.h */
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