CRC32 Class Reference

CRC-32. More...

#include <base/security/CRC32.h>

Inherits Object, and PushInterface.

Public Member Functions
	CRC32 () noexcept
MemorySize	push (const uint8 *buffer, MemorySize size) noexcept
void	pushEnd () noexcept
uint64	getTotalSize () const noexcept
uint32	getValue () const noexcept
void	setValue (uint32 value) noexcept
Public Member Functions inherited from PushInterface
virtual void	flush ()
virtual bool	pushBegin (uint64 totalSize)

Static Public Attributes
static const uint32	LOOKUP [256]

Detailed Description

CRC-32.

Implementation of the 32 bit Cyclic Redundancy Check (CRC-32) algorithm as described by ISO 3309 (also see RFC 1952).

Should only be used for compatibility with legacy systems.

See also

Adler32 MD5Sum SHA1

Version

1.0

Examples

testsuite/digest.cpp.

Constructor & Destructor Documentation

CRC32()

CRC32::CRC32 ( )

noexcept

Initializes object with an initial checksum of 0.

Member Function Documentation

getTotalSize()

uint64 CRC32::getTotalSize ( ) const

inlinenoexcept

Returns the total size of the original message.

getValue()

uint32 CRC32::getValue ( ) const

inlinenoexcept

Returns the checksum.

Examples

testsuite/digest.cpp.

push()

MemorySize CRC32::push ( const uint8 *  buffer, MemorySize  size  )

virtualnoexcept

Updates the checksum corresponding to the specified data. May be called multiple times.

Parameters

buffer	The buffer holding the data.
size	The number of octets in the buffer.

Implements PushInterface.

Examples

testsuite/digest.cpp.

pushEnd()

void CRC32::pushEnd ( )

inlinevirtualnoexcept

Does nothing.

Reimplemented from PushInterface.

Examples

testsuite/digest.cpp.

setValue()

void CRC32::setValue ( uint32  value )

inlinenoexcept

Sets the checksum.

Member Data Documentation

LOOKUP

const uint32 CRC32::LOOKUP[256]

static

Lookup table of CRCs of all 8-bit messages.