crc.h File Reference

crc headers. More...

#include <types.h>

Macros
#define	___CRC_H   0
#define	CRC32_SEED   0xffffffff

Functions
void	crc32_init_table (void)
	initialize crc32 tables for fast calculation
uint32_t	crc32_sum (uint8_t *p, uint32_t bytelength, uint32_t init)
	calculates crc32 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

CRC32_SEED

#define CRC32_SEED   0xffffffff

crc32 seed

Function Documentation

crc32_sum()

uint32_t crc32_sum	(	uint8_t *	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