ndn::security::transform::Downstream Class Reference

The downstream interface of a transformation module. More...

#include <transform-base.hpp>

Inheritance diagram for ndn::security::transform::Downstream:

Public Member Functions
virtual	~Downstream ()=default
size_t	write (const uint8_t *buf, size_t size)
	Accept input data and perform transformation. More...
void	end ()
	Close the input interface of a module. More...
bool	isEnd () const
	Check if the input interface of a module is closed. More...
void	setIndex (size_t index)
	Set the module index. More...
size_t	getIndex () const
	Get the module index. More...

Protected Member Functions
	Downstream ()

Detailed Description

The downstream interface of a transformation module.

A module can accept input through this interface

Definition at line 68 of file transform-base.hpp.

Constructor & Destructor Documentation

~Downstream()

virtual ndn::security::transform::Downstream::~Downstream ( )

virtualdefault

Downstream()

ndn::security::transform::Downstream::Downstream ( )

protected

Definition at line 34 of file transform-base.cpp.

Member Function Documentation

write()

size_t ndn::security::transform::Downstream::write	(	const uint8_t *	buf,
		size_t	size
	)

Accept input data and perform transformation.

An upstream module should call this method to write data into this module. The written data will be transformed and the result will be written into the next downstream module.

An upstream module can keep calling this method to until end() is called, which indicates the end of input. After that, calling this method will cause Error.

If a Downstream implementation expects structured input (e.g., hex decoding requires byte-pair), it should not return less than size if final portion of input is not a complete record.

Returns

number of bytes that has been written into this module

Exceptions

Error

if this module is closed or transformation error happens.

Definition at line 41 of file transform-base.cpp.

References buf, getIndex(), and NDN_THROW.

end()

void ndn::security::transform::Downstream::end

(

)

Close the input interface of a module.

This method will notify this module that there is no more input and that the module should finalize transformation.

Although end() can be invoked multiple times, only the first invocation takes effect.

Definition at line 52 of file transform-base.cpp.

isEnd()

bool ndn::security::transform::Downstream::isEnd ( ) const

inline

Check if the input interface of a module is closed.

Definition at line 108 of file transform-base.hpp.

setIndex()

void ndn::security::transform::Downstream::setIndex ( size_t  index )

inline

Set the module index.

Definition at line 117 of file transform-base.hpp.

getIndex()

size_t ndn::security::transform::Downstream::getIndex ( ) const

inline

Get the module index.

Definition at line 126 of file transform-base.hpp.

Referenced by ndn::security::transform::BlockCipher::BlockCipher(), ndn::security::transform::DigestFilter::DigestFilter(), ndn::security::transform::SignerFilter::SignerFilter(), ndn::security::transform::VerifierFilter::VerifierFilter(), and write().

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

• ndnSIM/ndn-cxx/ndn-cxx/security/transform/transform-base.hpp
• ndnSIM/ndn-cxx/ndn-cxx/security/transform/transform-base.cpp