PlotReader.h

// -*- c++ -*-

#ifndef __PLOT_READER_H__
#define __PLOT_READER_H__

#include "storage/RawDataReader.h"

class PlotReader : public DataReader {

public:
    
  PlotReader(Index &index, double delta);
    
  const RawValue::Data* find(const std::string& channel_name,
                             const epicsTime* start);
    
  const std::string& getName() const;
    
  const RawValue::Data* next();
    
  const RawValue::Data* get() const;
    
  DbrType getType() const;

  DbrCount getCount() const;
    
  const CtrlInfo& getInfo() const;
    
  bool changedType();
    
  bool changedInfo();

private:

    double delta;

    epicsTime end_of_bin;
    
    RawDataReader reader;

    const RawValue::Data *reader_data;

    DbrType type;
    DbrCount count;
    bool type_changed;
    RawValueAutoPtr initial_sample, mini_sample, maxi_sample, 
      info_sample, final_sample;
    bool have_initial, have_mini, have_maxi, have_info, have_final;
    double mini_dbl, maxi_dbl;

    CtrlInfo info;
    bool ctrl_info_changed;

    enum { BinSampleCount = 5 };
    const RawValue::Data *samples[BinSampleCount];
    int sample_index;
    
    void addSample(const RawValue::Data *);

    const RawValue::Data *current;

    void clearValues();

    const RawValue::Data *analyzeBin();
};

#endif