data-calculator.h

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/*
 * Copyright (c) 2008 Drexel University
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Joe Kopena (tjkopena@cs.drexel.edu)
 */
 
#ifndef DATA_CALCULATOR_H
#define DATA_CALCULATOR_H
 
#include "ns3/deprecated.h"
#include "ns3/nstime.h"
#include "ns3/object.h"
#include "ns3/simulator.h"
 
namespace ns3
{
NS_DEPRECATED_3_44("Use std::nan(\"\") instead")
extern const double NaN; //!< Stored representation of NaN
 
/**
 * @brief true if x is NaN
 * @param x
 * @return whether x is NaN
 */
NS_DEPRECATED_3_44("Use std::isnan() instead")
 
inline bool
isNaN(double x)
{
    return std::isnan(x);
}
 
class DataOutputCallback;
 
/**
 * @ingroup stats
 * @class StatisticalSummary
 * @brief Abstract class for calculating statistical data
 *
 */
class StatisticalSummary
{
  public:
    /**
     * Destructor
     */
    virtual ~StatisticalSummary()
    {
    }
 
    /**
     * Returns the number of observations.
     * @return Number of observations
     */
    virtual long getCount() const = 0;
 
    /**
     * @return Sum of values
     * @see getWeightedSum()
     */
    virtual double getSum() const = 0;
 
    /**
     * @return Sum of squared values
     * @see getWeightedSqrSum()
     */
    virtual double getSqrSum() const = 0;
 
    /**
     * Returns the minimum of the values.
     * @return Minimum of values
     */
    virtual double getMin() const = 0;
 
    /**
     * Returns the maximum of the values.
     * @return Maximum of values
     */
    virtual double getMax() const = 0;
 
    /**
     * Returns the mean of the (weighted) observations.
     * @return Mean of (weighted) observations
     */
    virtual double getMean() const = 0;
 
    /**
     * Returns the standard deviation of the (weighted) observations.
     * @return Standard deviation of (weighted) observations
     */
    virtual double getStddev() const = 0;
 
    /**
     * Returns the variance of the (weighted) observations.
     * @return Variance of (weighted) observations
     */
    virtual double getVariance() const = 0;
};
 
//------------------------------------------------------------
//--------------------------------------------
/**
 * @ingroup stats
 * @class DataCalculator
 * @brief Calculates data during a simulation
 *
 */
class DataCalculator : public Object
{
  public:
    DataCalculator();
    ~DataCalculator() override;
 
    /**
     * Register this type.
     * @return The TypeId.
     */
    static TypeId GetTypeId();
 
    /**
     * Returns whether the DataCalculator is enabled
     * @return true if DataCalculator is enabled
     */
    bool GetEnabled() const;
    /**
     * Enables DataCalculator when simulation starts
     */
    void Enable();
    /**
     * Disables DataCalculator when simulation stops
     */
    void Disable();
    /**
     * Sets the DataCalculator key to the provided key
     * @param key Key value as a string
     */
    void SetKey(const std::string key);
    /**
     * Gets the DataCalculator key
     * @return Key value as a string
     */
    std::string GetKey() const;
 
    /**
     * Sets the DataCalculator context to the provided context
     * @param context Context value as a string
     */
    void SetContext(const std::string context);
    /**
     * Gets the DataCalculator context
     * @return Context value as a string
     */
    std::string GetContext() const;
 
    /**
     * Starts DataCalculator at a given time in the simulation
     * @param startTime
     */
    virtual void Start(const Time& startTime);
    /**
     * Stops DataCalculator at a given time in the simulation
     * @param stopTime
     */
    virtual void Stop(const Time& stopTime);
 
    /**
     * Outputs data based on the provided callback
     * @param callback
     */
    virtual void Output(DataOutputCallback& callback) const = 0;
 
  protected:
    bool m_enabled; //!< Descendant classes *must* check & respect m_enabled!
 
    std::string m_key;     //!< Key value
    std::string m_context; //!< Context value
 
    void DoDispose() override;
 
  private:
    EventId m_startEvent; //!< Start event
    EventId m_stopEvent;  //!< Stop event
 
    // end class DataCalculator
};
 
// end namespace ns3
}; // namespace ns3
 
#endif /* DATA_CALCULATOR_H */