plotexpressionbinddomain.h

//
// author Kazys Stepanas
//
// Copyright (c) CSIRO 2015
//
#ifndef __PLOTEXPRESSIONBINDDOMAIN_H_
#define __PLOTEXPRESSIONBINDDOMAIN_H_

#include "plotsconfig.h"

#include <cstddef>

enum BindResult
{
  BindError = -1,   
  BindFailure = 0,  
  Bound,            
  BoundMaybeMore    
};

struct PlotExpressionBindDomain
{
  double domainMin;   
  double domainMax;   
  double sampleDelta; 
  size_t sampleCount; 
  bool minSet;        
  bool maxSet;        

  inline PlotExpressionBindDomain() : domainMin(0), domainMax(0), sampleDelta(0), sampleCount(0), minSet(false), maxSet(false) {}

  void setUnbounded();

  inline bool isUnbounded() const { return sampleCount == 0u; }

  inline bool contains(double sampleTime, bool closedMin = true, bool closedMax = true) const;
};

void domainUnion(PlotExpressionBindDomain &result, const PlotExpressionBindDomain &a, const PlotExpressionBindDomain &b);

inline void domainUnion(PlotExpressionBindDomain &a, const PlotExpressionBindDomain &b)
{
  return domainUnion(a, a, b);
}


inline void PlotExpressionBindDomain::setUnbounded()
{
  domainMin = domainMax = sampleDelta = 0;
  sampleCount = 0u;
  minSet = maxSet = false;
}


inline bool PlotExpressionBindDomain::contains(double sampleTime, bool closedMin, bool closedMax) const
{
  if (minSet && (closedMin && sampleTime < domainMin || !closedMin && sampleTime <= domainMin))
  {
    return false;
  }

  if (maxSet && (closedMax && sampleTime > domainMax || !closedMax  && sampleTime >= domainMax))
  {
    return false;
  }

  return true;
}

#endif // __PLOTEXPRESSIONBINDDOMAIN_H_