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93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/**
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* \file crc32.h
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* Functions and types for CRC checks.
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*
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* Generated on Wed Dec 2 02:28:13 2015,
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* by pycrc v0.8.3, https://pycrc.org
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* using the configuration:
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* Width = 32
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* Poly = 0x04c11db7
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* XorIn = 0xffffffff
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* ReflectIn = True
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* XorOut = 0xffffffff
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* ReflectOut = True
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* Algorithm = table-driven
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*****************************************************************************/
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#ifndef __CRC32_H__
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#define __CRC32_H__
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#include <stdlib.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* The definition of the used algorithm.
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*
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* This is not used anywhere in the generated code, but it may be used by the
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* application code to call algoritm-specific code, is desired.
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*****************************************************************************/
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#define CRC_ALGO_TABLE_DRIVEN 1
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/**
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* The type of the CRC values.
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*
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* This type must be big enough to contain at least 32 bits.
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*****************************************************************************/
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typedef uint_fast32_t crc32_t;
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/**
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* Reflect all bits of a \a data word of \a data_len bytes.
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*
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* \param data The data word to be reflected.
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* \param data_len The width of \a data expressed in number of bits.
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* \return The reflected data.
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*****************************************************************************/
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crc32_t crc32_reflect(crc32_t data, size_t data_len);
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/**
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* Calculate the initial crc value.
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*
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* \return The initial crc value.
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*****************************************************************************/
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static inline crc32_t crc32_init(void)
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{
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return 0xffffffff;
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}
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/**
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* Update the crc value with new data.
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*
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* \param crc The current crc value.
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* \param data Pointer to a buffer of \a data_len bytes.
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* \param data_len Number of bytes in the \a data buffer.
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* \return The updated crc value.
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*****************************************************************************/
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crc32_t crc32_update(crc32_t crc, const void *data, size_t data_len);
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/**
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* Calculate the final crc value.
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*
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* \param crc The current crc value.
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* \return The final crc value.
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*****************************************************************************/
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static inline crc32_t crc32_finalize(crc32_t crc)
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{
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return crc ^ 0xffffffff;
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}
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#ifdef __cplusplus
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} /* closing brace for extern "C" */
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#endif
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#endif /* __CRC32_H__ */
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