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/**
* \file crc.h
* Functions and types for CRC checks.
*
* Generated on Sun Oct 24 10:58:41 2010,
* by pycrc v0.7.6, http://www.tty1.net/pycrc/
* using the configuration:
* Width = 32
* Poly = 0x04c11db7
* XorIn = 0xffffffff
* ReflectIn = True
* XorOut = 0xffffffff
* ReflectOut = True
* Algorithm = table-driven
*****************************************************************************/
#ifndef __CRC_H__
#define __CRC_H__
#include <stdint.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* The definition of the used algorithm.
*****************************************************************************/
#define CRC_ALGO_TABLE_DRIVEN 1
/**
* The type of the CRC values.
*
* This type must be big enough to contain at least 32 bits.
*****************************************************************************/
typedef unsigned long crc_t;
/**
* Reflect all bits of a \a data word of \a data_len bytes.
*
* \param data The data word to be reflected.
* \param data_len The width of \a data expressed in number of bits.
* \return The reflected data.
*****************************************************************************/
crc_t crc_reflect(crc_t data, size_t data_len);
/**
* Calculate the initial crc value.
*
* \return The initial crc value.
*****************************************************************************/
#define crc_init() (0xffffffff)
/**
* Update the crc value with new data.
*
* \param crc The current crc value.
* \param data Pointer to a buffer of \a data_len bytes.
* \param data_len Number of bytes in the \a data buffer.
* \return The updated crc value.
*****************************************************************************/
crc_t crc_update(crc_t crc, const unsigned char *data, size_t data_len);
/**
* Calculate the final crc value.
*
* \param crc The current crc value.
* \return The final crc value.
*****************************************************************************/
#define crc_finalize(crc) (crc ^ 0xffffffff)
#ifdef __cplusplus
} /* closing brace for extern "C" */
#endif
#endif /* __CRC_H__ */
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