Reads data from storage with linear interpolation. More...

Inheritance diagram for LinearReader:

Public Member Functions
	LinearReader (Index &index, double delta)
	Create a reader for an index. More...

const RawValue::Data *	find (const std::string &channel_name, const epicsTime *start)
	Returns a sample of the specified channel.

const std::string &	getName () const
	Returns a channel name.

const RawValue::Data *	next ()
	Return the next sample.

Public Member Functions inherited from AverageReader
	AverageReader (Index &index, double delta)
	Create a reader for an index. More...

const RawValue::Data *	find (const std::string &channel_name, const epicsTime *start)
	Returns sample of the specified channel.

const RawValue::Data *	get () const
	Returns the present sample.

DbrType	getType () const
	Return the value type.

DbrCount	getCount () const
	Returns the count of the sample value.

const CtrlInfo &	getInfo () const
	Returns CtrlInfo.

bool	changedType ()
	Checks if type changed.

bool	changedInfo ()
	Checks if CtrlInfo changed.

bool	isRaw () const

double	getMinimum () const

double	getMaximum () const

Public Member Functions inherited from DataReader
virtual const RawValue::Data *	find (const stdString &channel_name, const epicsTime *start)=0
	Locate data. More...

void	toString (stdString &text) const
	Convert current value to string. More...

Detailed Description

Reads data from storage with linear interpolation.

The LinearReader is an implementation of a DataReader that aligns data onto multiples of 'delta' seconds on the time axis via linear interpolation.

Constructor & Destructor Documentation

Create a reader for an index.

Parameters

index	index file
delta	The interpolation time interval in seconds.

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

/home/malitsky/projects/epics-archiver/sourceforge/trunk/ea4-cpp/include/common/storage/LinearReader.h