CRC-32 checksum generator. More...

#include <cc/Crc32Sink>

Inheritance diagram for Crc32Sink:

Public Member Functions
	Crc32Sink ()=default
	Create a null CRC-32 sink.

	Crc32Sink (std::uint32_t seed=DefaultSeed)
	Create a new CRC-32 sink.

std::uint32_t	sum () const
	Current CRC-32 checksum value

Public Member Functions inherited from HashSink
	HashSink ()=default
	Create a null hash sink.

Bytes	finish ()
	Finish hash computation and return the final hash sum.

Public Member Functions inherited from Stream
	Stream ()=default
	Create a null stream.

bool	waitEstablished (int timeout=-1)
	Wait until the connection is fully established.

bool	wait (IoEvent event, int timeout=-1)
	Wait for an I/O event.

long	read (Out< Bytes > buffer, long maxFill=-1)
	Read available bytes into buffer and return number of bytes read.

void	write (const Bytes &buffer, long fill=-1)
	Write fill bytes from buffer (if fill < 0 write all bytes from buffer)

void	write (const List< Bytes > &buffers)
	Write the contents of buffers in one go.

void	write (const List< String > &parts)
	Convenience method, equivalent to 'write(parts.join())'.

void	write (const struct iovec *iov, int iovcnt)
	Write the contents of the iov buffers in one go.

void	write (const char *s)
	Write C-string s.

bool	isDiscarding () const
	Return true if this stream is discarding all writes

long long	transferTo (const Stream &sink, long long count, const Bytes &buffer)
	Transfer a span of bytes.

long long	transferTo (const Stream &sink, long long count=-1)
	Transfer a span of bytes.

long	defaultTransferUnit () const
	Default I/O buffer size.

long long	skip (long long count)
	Read and discard count bytes.

void	drain (const Bytes &auxBuffer=Bytes{})
	Read everything that is left.

long	readSpan (Out< Bytes > buffer)
	Read fixed number of bytes.

String	readSpan (long count)
	Read a fixed number of bytes.

String	readAll ()
	Read the entire stream.

Public Member Functions inherited from Object
	Object ()=default
	Create a null object.

	operator bool () const
	Check if this is a non-null object.

bool	isNull () const
	Check if this is a null object.

template<class T >
bool	is () const
	Check if this object is of type T.

template<class T >
T	as () const
	Cast this object to type T.

bool	isWeak () const
	Check if the underlying object reference is weak.

bool	operator== (const Object &other) const
	Equality operator.

std::strong_ordering	operator<=> (const Object &other) const
	Ordering operator.

long	useCount () const
	Reference count.

Static Public Attributes
static constexpr int	HashSize = 4
	CRC-32 checksum size.

static constexpr std::uint32_t	DefaultSeed = ~std::uint32_t(0)
	Default CRC-32 seed

Additional Inherited Members
Protected Member Functions inherited from HashSink
	HashSink (State *newState)
	Initialize with newState.

State &	me ()

Protected Member Functions inherited from Stream
	Stream (State *newState)

State &	me ()

const State &	me () const

Protected Member Functions inherited from Object
template<class T >
T	weak () const

template<class T >
void	initOnce ()
	Create the object state when called the first time.

template<class T >
void	initOncePerThread ()
	Create a distinct object state for each thread when called the first time in that thread.

	Object (State *newState)
	Initialize object with newState.

	Object (State *state, Alias)

	Object (State *state, Weak)

Object &	operator= (std::nullptr_t)

Static Protected Member Functions inherited from Object
template<class T >
static T	alias (const State *state)
	Create an alias object for the given state.

template<class T >
static T	weak (const State *state)

Protected Attributes inherited from Object
Handle< State >	me
	Internal object state

Detailed Description

CRC-32 checksum generator.

Constructor & Destructor Documentation

◆ Crc32Sink() [1/2]

Crc32Sink ( )

default

Create a null CRC-32 sink.

◆ Crc32Sink() [2/2]

Crc32Sink ( std::uint32_t seed = DefaultSeed )

explicit

Create a new CRC-32 sink.

Parameters

seed	Initial checksum value

Member Function Documentation

◆ sum()

std::uint32_t sum ( ) const

Current CRC-32 checksum value

Member Data Documentation

◆ HashSize

constexpr int HashSize = 4

staticconstexpr

CRC-32 checksum size.

◆ DefaultSeed

constexpr std::uint32_t DefaultSeed = ~std::uint32_t(0)