A "null" stream, always invalid. More...

#include <yarp/os/TwoWayStream.h>

Inheritance diagram for yarp::os::NullStream:

Public Member Functions
virtual	~NullStream ()

InputStream &	getInputStream () override
	Get an InputStream to read from. More...

OutputStream &	getOutputStream () override
	Get an OutputStream to write to. More...

const Contact &	getLocalAddress () const override
	Get the address of the local side of the stream. More...

const Contact &	getRemoteAddress () const override
	Get the address of the remote side of the stream. More...

bool	isOk () const override
	Check if the stream is ok or in an error state. More...

void	reset () override
	Reset the stream. More...

void	close () override
	Terminate the stream. More...

void	beginPacket () override
	Mark the beginning of a logical packet. More...

void	endPacket () override
	Mark the end of a logical packet (see beginPacket). More...

yarp::conf::ssize_t	read (Bytes &b) override
	Read a block of data from the stream. More...

void	write (const Bytes &b) override
	Write a block of bytes to the stream. More...

Public Member Functions inherited from yarp::os::TwoWayStream
virtual	~TwoWayStream ()
	Destructor. More...

Public Member Functions inherited from yarp::os::InputStream
	InputStream ()
	Constructor. More...

virtual	~InputStream ()
	Destructor. More...

virtual void	check ()
	Perform maintenance actions, if needed. More...

virtual int	read ()
	Read and return a single byte. More...

virtual yarp::conf::ssize_t	read (Bytes &b, size_t offset, yarp::conf::ssize_t len)
	Read a block of data from the stream. More...

virtual yarp::conf::ssize_t	partialRead (yarp::os::Bytes &b)
	Like read, but solicit partial responses. More...

virtual void	interrupt ()
	Interrupt the stream. More...

virtual bool	setReadTimeout (double timeout)
	Set activity timeout. More...

std::string	readLine (const char terminal='\n', bool *success=nullptr)
	Read a block of text terminated with a specific marker (or EOF). More...

yarp::conf::ssize_t	readFull (Bytes &b)
	Keep reading until buffer is full. More...

yarp::conf::ssize_t	readDiscard (size_t len)
	Read and discard a fixed number of bytes. More...

virtual bool	setReadEnvelopeCallback (readEnvelopeCallbackType callback, void *data)
	Install a callback that the InputStream will have to call when the envelope is read from a message in carriers that cannot be escaped. More...

Public Member Functions inherited from yarp::os::OutputStream
virtual	~OutputStream ()
	Destructor. More...

virtual void	write (char ch)
	Write a single byte to the stream. More...

virtual void	write (const Bytes &b, int offset, int len)
	Write a block of bytes to the stream. More...

virtual void	flush ()
	Make sure all pending write operations are finished. More...

virtual void	writeLine (const char *data, int len)
	Write some text followed by a line feed. More...

virtual bool	setWriteTimeout (double timeout)
	Set activity timeout. More...

virtual bool	setTypeOfService (int tos)

virtual int	getTypeOfService ()

Additional Inherited Members
Public Types inherited from yarp::os::InputStream
typedef void(*	readEnvelopeCallbackType) (void *, const yarp::os::Bytes &envelope)
	Callback type for setting the envelope from a message in carriers that cannot be escaped. More...

Detailed Description

A "null" stream, always invalid.

Definition at line 108 of file TwoWayStream.h.

Constructor & Destructor Documentation

◆ ~NullStream()

NullStream::~NullStream ( )

virtualdefault

Member Function Documentation

◆ beginPacket()

void NullStream::beginPacket ( )

overridevirtual

Mark the beginning of a logical packet.

This is a unit that should be treated in an atomic fashion by YARP. If any part is corrupted, the whole should be dropped.

Implements yarp::os::TwoWayStream.

Definition at line 51 of file TwoWayStream.cpp.

◆ close()

void NullStream::close ( )

overridevirtual

Terminate the stream.

Implements yarp::os::InputStream.

Definition at line 47 of file TwoWayStream.cpp.

◆ endPacket()

void NullStream::endPacket ( )

overridevirtual

Mark the end of a logical packet (see beginPacket).

Implements yarp::os::TwoWayStream.

Definition at line 55 of file TwoWayStream.cpp.

◆ getInputStream()

InputStream & NullStream::getInputStream ( )

overridevirtual

Get an InputStream to read from.

Returns: the InputStream associated with this object.

Implements yarp::os::TwoWayStream.

Definition at line 18 of file TwoWayStream.cpp.

◆ getLocalAddress()

const Contact & NullStream::getLocalAddress ( ) const

overridevirtual

Get the address of the local side of the stream.

Returns: the address of the local side of the stream. The address will be tagged as invalid if the stream is not set up.

Implements yarp::os::TwoWayStream.

Definition at line 28 of file TwoWayStream.cpp.

◆ getOutputStream()

OutputStream & NullStream::getOutputStream ( )

overridevirtual

Get an OutputStream to write to.

Returns: the InputStream associated with this object.

Implements yarp::os::TwoWayStream.

Definition at line 23 of file TwoWayStream.cpp.

◆ getRemoteAddress()

const Contact & NullStream::getRemoteAddress ( ) const

overridevirtual

Get the address of the remote side of the stream.

Returns: the address of the remote side of the stream. The address will be tagged as invalid if the stream is not set up.

Implements yarp::os::TwoWayStream.

Definition at line 33 of file TwoWayStream.cpp.

◆ isOk()

bool NullStream::isOk ( ) const

overridevirtual

Check if the stream is ok or in an error state.

Returns: true iff the stream is ok

Implements yarp::os::InputStream.

Definition at line 38 of file TwoWayStream.cpp.

◆ read()

yarp::conf::ssize_t NullStream::read ( Bytes & b )

overridevirtual

Read a block of data from the stream.

Should block and wait for data.

Parameters

b[out] the block of data to read to

Returns: the number of bytes read, or -1 upon error

Implements yarp::os::InputStream.

Definition at line 59 of file TwoWayStream.cpp.

◆ reset()

void NullStream::reset ( )

overridevirtual

Reset the stream.

Implements yarp::os::TwoWayStream.

Definition at line 43 of file TwoWayStream.cpp.

◆ write()

void NullStream::write ( const Bytes & b )

overridevirtual

Write a block of bytes to the stream.

Parameters

b	the bytes to write

Implements yarp::os::OutputStream.

Definition at line 65 of file TwoWayStream.cpp.

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

src/libYARP_os/src/yarp/os/TwoWayStream.h
src/libYARP_os/src/yarp/os/TwoWayStream.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~NullStream()

Member Function Documentation

◆ beginPacket()

◆ close()

◆ endPacket()

◆ getInputStream()

◆ getLocalAddress()

◆ getOutputStream()

◆ getRemoteAddress()

◆ isOk()

◆ read()

◆ reset()

◆ write()