crc.64.c File Reference

CRC32 implementation. More...

#include <crc.h>

Functions
	MODULE ("turnstone.lib")
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
static uint32_t	crc32c_u8 (uint32_t crc, uint8_t data)
static uint32_t	crc32c_u32 (uint32_t crc, uint32_t data)
uint32_t	crc32c_sum (const void *data, uint64_t size, uint32_t init)
	calculates crc32c sum
uint32_t	adler32_sum (const void *data, uint64_t size, uint32_t init)
	calculates adler32 sum

Variables
uint32_t	crc32_table [256] = {}

Detailed Description

CRC32 implementation.

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

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_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