SpreadsheetReader.h

// -*- c++ -*-

// tools
#include "tools/ToolsConfig.h"
#include "tools/AutoPtr.h"

// storage
#include "storage/ReaderFactory.h"
#include "storage/Index.h"



class SpreadsheetReader
{
  public:
    SpreadsheetReader(Index &index,
                      ReaderFactory::How how = ReaderFactory::Raw,
                      double delta=0.0);

    virtual ~SpreadsheetReader();
    
    virtual bool find(const stdVector<stdString> &channel_names,
                      const epicsTime *start = 0);

    bool found(size_t i) const
    {
        return info[i];
    }

    virtual const epicsTime &getTime() const;
    

    virtual size_t getNum() const;

    virtual const stdString &getName(size_t i) const;

    virtual const RawValue::Data *get(size_t i) const;

    virtual DbrType getType(size_t i) const;
    
    virtual DbrCount getCount(size_t i) const;
    
    virtual const CtrlInfo &getInfo(size_t i) const;
    
    bool next();  
  
protected:

    Index              &index;
    ReaderFactory::How how;
    double             delta;
    
    // Number of array entries for the following stuff that's non-scalar
    size_t num;

    // One reader per channel (also has a copy of the channel names)
    AutoArrayPtr< AutoPtr<DataReader> > reader;

    // Current data for each reader.
    // This often already points at the 'next' value.
    AutoArrayPtr< const RawValue::Data *> read_data;
    
    // The current time slice
    epicsTime time;

    // Copies of the current control infos
    AutoArrayPtr< AutoPtr<CtrlInfo> > info;

    // Type/count for following value
    AutoArrayPtr<DbrType> type;
    AutoArrayPtr<DbrCount> count;
    
    // The current values, i.e. copy of the reader's value
    // for the current time slice, or 0.
    AutoArrayPtr<RawValueAutoPtr> value;

private:
    PROHIBIT_DEFAULT_COPY(SpreadsheetReader);
};