Range.h

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/* -*- mode: c++ -*- */

#ifndef _RANGE_H_
#define _RANGE_H_

#include "pattern/libhippo.h"

#include <iosfwd>
#include <vector>

#include <cfloat> // for DBL_MAX

class MDL_HIPPOPLOT_API Range {

private:

  double m_min;

  double m_max;

  double m_pos;

  bool m_empty;
  
 public:

  Range ( );

  Range ( double x,
          double y,
          double p = DBL_MAX );

  Range ( const std::vector < double > & array );

  double low() const;

  void setLow(double x);

  double high() const;

  void setHigh(double x);

  double pos() const;

  void setPos(double x);

  void setRange ( double low, double high, double pos );

  template < class Iterator >
  void setRange ( Iterator first, Iterator end );

  inline double length() const;

  void setLength ( double val, bool high_hold = false );
  
  bool includes ( double value ) const;

  bool excludes ( double value ) const;

  double fraction ( double value ) const;

  void setIntersect ( const Range & range );

  void setUnion ( const Range & range );

  void setEmpty ( bool yes = true );

  int numberOfBins ( double width ) const;

  friend std::ostream & operator << ( std::ostream &, const Range & );

};

inline
double
Range::
length () const
{
  return (m_max - m_min);
}


template < class Iterator >
void
Range::
setRange ( Iterator first, Iterator end )
{
  m_min = DBL_MAX;
  m_max = -DBL_MAX;
  m_pos = DBL_MAX;

  while ( first != end ) {
    double test = *first; // input might be pointer to float.
    m_min = std::min ( m_min, test );
    m_max = std::max ( m_max, test );
    if ( test > 0.0 ) m_pos = std::min ( m_pos, test );
    ++first;
  }
}

#endif // _RANGE_H_

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