CRC32

32-bit CRC More...

Collaboration diagram for CRC32:

Data Structures
struct	crc32_data_t
	State information for the CRC32 algorithm. More...

CRC32
void	crc32_init (crc32_data_t *crc32Config)
	Initializes the parameters of the crc function, must be called first. More...
void	crc32_update (crc32_data_t *crc32Config, const uint8_t *src, uint32_t lengthInBytes)
	A "running" crc calculator that updates the crc value after each call. More...
void	crc32_finalize (crc32_data_t *crc32Config, uint32_t *hash)
	Calculates the final crc value, padding with zeros if necessary, must be called last. More...

Usage Information

32-bit CRC

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Data Structure Documentation

struct crc32_data_t

State information for the CRC32 algorithm.

Data Fields
uint32_t	byteCountCrc	Number of bytes processed.
uint32_t	currentCrc	Current CRC value.

Function Documentation

void crc32_finalize	(	crc32_data_t *	crc32Config,
		uint32_t *	hash
	)

Calculates the final crc value, padding with zeros if necessary, must be called last.

Parameters

crc32Config	Instantiation of the data structure of type crc32_data_t
hash	Pointer to the value returned for the final calculated crc value

Return values

kStatus_Success

void crc32_init

(

crc32_data_t *

crc32Config

)

Initializes the parameters of the crc function, must be called first.

Parameters

crc32Config

Instantiation of the data structure of type crc32_data_t

Return values

kStatus_Success

void crc32_update	(	crc32_data_t *	crc32Config,
		const uint8_t *	src,
		uint32_t	lengthInBytes
	)

A "running" crc calculator that updates the crc value after each call.

Parameters

crc32Config	Instantiation of the data structure of type crc32_data_t
src	Pointer to the source buffer of data
lengthInBytes	The length, given in bytes (not words or long-words)

Return values

kStatus_Success

Note: We must init CRC module here, As we may seperate one crc calculation into several times Note: It is better to use lock to ensure the integrity of current updating operation of crc calculation