crc.h File Reference

crc headers. More...

#include <types.h>

Macros
#define	___CRC_H   0
#define	CRC32_SEED   0xffffffff
#define	ADLER32_SEED   1

Functions
void	crc32_init_table (void)
	initialize crc32 tables for fast calculation
uint32_t	crc32_sum (const void *p, uint32_t bytelength, uint32_t init)
	calculates crc32 sum More...
uint32_t	crc32c_sum (const void *data, uint64_t size, uint32_t init)
	calculates crc32c sum More...
static uint32_t	crc32_finalize (uint32_t crc)
	finalize crc32 sum More...
uint32_t	adler32_sum (const void *data, uint64_t size, uint32_t init)
	calculates adler32 sum More...

Detailed Description

crc headers.

This work is licensed under TURNSTONE OS Public License. Please read and understand latest version of Licence.

Macro Definition Documentation

___CRC_H

#define ___CRC_H   0

prevent duplicate header error macro

ADLER32_SEED

#define ADLER32_SEED   1

adler32 seed

CRC32_SEED

#define CRC32_SEED   0xffffffff

crc32 seed

Function Documentation

adler32_sum()

uint32_t adler32_sum	(	const void *	data,
		uint64_t	size,
		uint32_t	init
	)

calculates adler32 sum

Parameters

[in]	data	input data
[in]	size	input length
[in]	init	seed/previous sum

Returns

crc32 sum

crc32_finalize()

static uint32_t crc32_finalize ( uint32_t  crc )

inlinestatic

finalize crc32 sum

Parameters

[in]

crc

pre crc32 sum

Returns

crc32 sum

crc32_sum()

uint32_t crc32_sum	(	const void *	p,
		uint32_t	bytelength,
		uint32_t	init
	)

calculates crc32 sum

Parameters

[in]	p	input data
[in]	bytelength	input length
[in]	init	CRC32_SEED or previous sum

Returns

pre crc32 sum, for finishing it should be xor'ed with CRC32_SEED

crc32c_sum()

uint32_t crc32c_sum	(	const void *	data,
		uint64_t	size,
		uint32_t	init
	)

calculates crc32c sum

Parameters

[in]	data	input data
[in]	size	input length
[in]	init	CRC32_SEED or previous sum

Returns

pre crc32 sum, for finishing it should be xor'ed with CRC32_SEED