#include <stdint.h>

Include dependency graph for include_v1.0/checksum.h:

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Defines
#define	_CHECKSUM_H_
#define	X25_INIT_CRC 0xffff
#define	X25_VALIDATE_CRC 0xf0b8
Functions
static void	crc_accumulate (uint8_t data, uint16_t *crcAccum)
	Accumulate the X.25 CRC by adding one char at a time.
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.
static uint16_t	crc_calculate (const uint8_t *pBuffer, uint16_t length)
	Calculates the X.25 checksum on a byte buffer.
static void	crc_init (uint16_t *crcAccum)
	Initiliaze the buffer for the X.25 CRC.

Define Documentation

Definition at line 6 of file include_v1.0/checksum.h.

#define X25_INIT_CRC 0xffff

CALCULATE THE CHECKSUM

Definition at line 21 of file include_v1.0/checksum.h.

#define X25_VALIDATE_CRC 0xf0b8

Definition at line 22 of file include_v1.0/checksum.h.

Function Documentation

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 include_v1.0/checksum.h.

static void crc_accumulate_buffer	(	uint16_t *	crcAccum,
		const char *	pBuffer,
		uint16_t	length
	)		`[inline, static]`

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 include_v1.0/checksum.h.

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 include_v1.0/checksum.h.

static void crc_init ( uint16_t * crcAccum ) [inline, static]

Initiliaze the buffer for the X.25 CRC.

Parameters:

crcAccum the 16 bit X.25 CRC

Definition at line 51 of file include_v1.0/checksum.h.