libcoyotl::crc_calculator Class Reference

Calculate 32-bit CRC values from byte data. More...

#include <crccalc.h>

List of all members.

Classes

• class crc_precalc

Public Member Functions

• crc_calculator ()

  Constrctor.
  

• void update (const unsigned char *a_data, size_t a_length)

  Update CRC for a given data set.
  

• crc32_t get_crc32 ()

  Get CRC value.
  

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Detailed Description

Calculates a 32-bit CRC value using the algorithm specified by ISO 3309, and as used by the PNG graphics specification.

Version:

1.1.0

Date:

15 June 2002

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Constructor & Destructor Documentation

libcoyotl::crc_calculator::crc_calculator

(

)

Constructs a new CRC value with a base value of 0xFFFFFFFF.

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Member Function Documentation

crc32_t libcoyotl::crc_calculator::get_crc32

(

)

[inline]

Returns the current 32-bit CRC value. This value will change with subsequent calls to update.

Returns:

Current 32-bit CRC value

void libcoyotl::crc_calculator::update	(	const unsigned char *	a_data,
		size_t	a_length
	)

Updates the crc value from the bytes provided in data. Each time this function is called for a given crc_calculator, the 32-bit CRC value changes to reflect the new bytes.

Parameters:

a_data	- Array of bytes to be "added" to the CRC value
a_length	- Number of bytes in the data array

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The documentation for this class was generated from the following file:

• crccalc.h