ODP HASH

API Description

Hash functions.

Data Structures
struct	odp_hash_crc_param_t
	CRC parameters. More...

Typedefs
typedef struct odp_hash_crc_param_t	odp_hash_crc_param_t
	CRC parameters. More...

Functions
uint32_t	odp_hash_crc32 (const void *data, uint32_t data_len, uint32_t init_val)
	Calculate CRC-32. More...
uint32_t	odp_hash_crc32c (const void *data, uint32_t data_len, uint32_t init_val)
	Calculate CRC-32C. More...
int	odp_hash_crc_gen64 (const void *data, uint32_t data_len, uint64_t init_val, odp_hash_crc_param_t *crc_param, uint64_t *crc)
	Calculate up to 64 bit CRC using the given parameters. More...

Typedef Documentation

odp_hash_crc_param_t

typedef struct odp_hash_crc_param_t odp_hash_crc_param_t

CRC parameters.

Supports CRCs up to 64 bits

Function Documentation

odp_hash_crc32()

uint32_t odp_hash_crc32	(	const void *	data,
		uint32_t	data_len,
		uint32_t	init_val
	)

Calculate CRC-32.

Calculates CRC-32 over the data. The polynomial is 0x04c11db7.

Parameters

data	Pointer to data
data_len	Data length in bytes
init_val	CRC generator initialization value

Returns

CRC32 value

Examples

odp_crc.c.

odp_hash_crc32c()

uint32_t odp_hash_crc32c	(	const void *	data,
		uint32_t	data_len,
		uint32_t	init_val
	)

Calculate CRC-32C.

Calculates CRC-32C (a.k.a. CRC-32 Castagnoli) over the data. The polynomial is 0x1edc6f41.

Parameters

data	Pointer to data
data_len	Data length in bytes
init_val	CRC generator initialization value

Returns

CRC32C value

Examples

odp_cpu_bench.c, odp_crc.c, odp_simple_pipeline.c, and odp_switch.c.

odp_hash_crc_gen64()

int odp_hash_crc_gen64	(	const void *	data,
		uint32_t	data_len,
		uint64_t	init_val,
		odp_hash_crc_param_t *	crc_param,
		uint64_t *	crc
	)

Calculate up to 64 bit CRC using the given parameters.

Calculates CRC over the data using the given parameters.

Parameters

data	Pointer to data
data_len	Data length in bytes
init_val	CRC generator initialization value
crc_param	CRC parameters
crc	Pointer for CRC output

Returns

0 on success, <0 on failure (e.g. not supported algorithm)