#include <stdint.h>

Include dependency graph for checksum.h:

This graph shows which files directly or indirectly include this file:

Functions
static void	crc_accumulate (uint8_t data, uint16_t *crcAccum)
	Accumulate the X.25 CRC by adding one char at a time. More...

static void	crc_accumulate_buffer (uint16_t crcAccum, const char pBuffer, uint16_t length)
	Accumulate the X.25 CRC by adding an array of bytes. More...

static uint16_t	crc_calculate (const uint8_t *pBuffer, uint16_t length)
	Calculates the X.25 checksum on a byte buffer. More...

static void	crc_init (uint16_t *crcAccum)
	Initiliaze the buffer for the X.25 CRC. More...

Macro Definition Documentation

#define _CHECKSUM_H_

Definition at line 6 of file checksum.h.

#define X25_INIT_CRC 0xffff

CALCULATE THE CHECKSUM

Definition at line 21 of file checksum.h.

#define X25_VALIDATE_CRC 0xf0b8

Definition at line 22 of file checksum.h.

Function Documentation

inlinestatic

Accumulate the X.25 CRC by adding one char at a time.

The checksum function adds the hash of one char at a time to the 16 bit checksum (uint16_t).

Parameters

data	new char to hash
crcAccum	the already accumulated checksum

Definition at line 34 of file checksum.h.

static void crc_accumulate_buffer	(	uint16_t *	crcAccum,
		const char *	pBuffer,
		uint16_t	length
	)

inlinestatic

Accumulate the X.25 CRC by adding an array of bytes.

The checksum function adds the hash of one char at a time to the 16 bit checksum (uint16_t).

Parameters

data	new bytes to hash
crcAccum	the already accumulated checksum

Definition at line 84 of file checksum.h.

inlinestatic

Calculates the X.25 checksum on a byte buffer.

Parameters

pBuffer	buffer containing the byte array to hash
length	length of the byte array

Definition at line 64 of file checksum.h.

static void crc_init ( uint16_t * crcAccum )

inlinestatic

Initiliaze the buffer for the X.25 CRC.

Parameters

crcAccum the 16 bit X.25 CRC

Definition at line 51 of file checksum.h.