RawDataReaderEA3.h

// -*- c++ -*-

#ifndef __RAW_DATA_READER_EA3_H__
#define __RAW_DATA_READER_EA3_H__

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

// storage
#include "storage/RawDataReader.h"
#include "storage/CtrlInfo.h"


class RawDataReaderEA3 : public DataReader
{
public:

  RawDataReaderEA3(Index &index, RawDataReader::PrvData* data);

  virtual ~RawDataReaderEA3();
    
  virtual const RawValue::Data *find(const stdString &channel_name,
                                     const epicsTime *start);

  virtual const std::string& getName() const;  
    
  virtual const RawValue::Data *next();


  virtual const RawValue::Data *get() const;
    
  virtual DbrType getType() const;

  virtual DbrCount getCount() const;

  virtual const CtrlInfo& getInfo() const;

  virtual bool changedType();

  virtual bool changedInfo();

 public:

    void read(DbrType type, DbrCount count,
              size_t size, RawValue::Data *value,
              class DataFile *datafile, FileOffset offset);

private:
 
    void getHeader(const stdString &basename, FileOffset offset);
    const RawValue::Data *findSample(const epicsTime &start);
    const RawValue::Data *nextFromDatablock();

private:

  // Index
  Index& index;  

  // Current sample
  size_t raw_value_size;
  AutoPtr<class DataHeader> header;
  size_t val_idx; // current index in data buffer

  RawDataReader::PrvData* prvData;

};


#endif