CRC

API for Cyclic Redundancy Checking More...

Functions
uint32_t __pure	net_crc32le (const uint8_t *data, int size)
	Calculate a "little-endian" CRC-32 over a block of data.
uint32_t __pure	net_crc32be (const uint8_t *data, int size)
	Calculate a "big-endian" CRC-32 over a block of data.
uint16_t __pure	net_crc16ccitt (const uint8_t *data, int size, uint16_t start)
	Calculate a CRC16-CCITT over a block of data.

Detailed Description

API for Cyclic Redundancy Checking

Function Documentation

net_crc16ccitt()

uint16_t __pure net_crc16ccitt	(	const uint8_t *	data,
		int	size,
		uint16_t	start )

Calculate a CRC16-CCITT over a block of data.

Note

Based on code found online at http://www.ccsinfo.com/forum/viewtopic.php?t=24977

Parameters

data	The data to calculate over.
size	The size of the data, in bytes.
start	The value to start with. This could be a previous return value from this function (if continuing a previous calculation) or some initial seed value (typically 0xFFFF or 0x0000).

Returns

The calculated CRC16-CCITT.

net_crc32be()

uint32_t __pure net_crc32be	(	const uint8_t *	data,
		int	size )

Calculate a "big-endian" CRC-32 over a block of data.

Parameters

data	The data to calculate over.
size	The size of the data, in bytes.

Returns

The calculated CRC-32.

net_crc32le()

uint32_t __pure net_crc32le	(	const uint8_t *	data,
		int	size )

Calculate a "little-endian" CRC-32 over a block of data.

Parameters

data	The data to calculate over.
size	The size of the data, in bytes.

Returns

The calculated CRC-32.