progress.h

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#ifndef AIMS_UTILITY_PROGRESS_H
#define AIMS_UTILITY_PROGRESS_H
 
#include <iostream>
#include <string>
 
namespace aims {
 
 
 
  template <class T1 = double, class T2 = double>
  class ProgressInfo {
 
    public:
      ProgressInfo( const T1 min,
                    const T1 max,
                    const T2 progressmin = (T2)0,
                    const T2 progressmax = (T2)100,
                    const std::string unit = "%",
                    const int width = 3,
                    std::ostream & stream = std::cout );
 
      ProgressInfo( const T1 max,
                    std::ostream & stream = std::cout );
 
      T1& current();
      void reset();
      const double& scale() const;
      double rescale(const T1& value) const;
      double progression() const;
      virtual std::string erase() const;
      virtual std::string endline() const;
      virtual std::string render(const bool force = false);
      virtual std::string toString() const;
      virtual void print( const bool force = false );
 
      ProgressInfo<T1, T2>& operator++(); // Prefix operator
      ProgressInfo<T1, T2> operator++(int); // Postfix operator
      ProgressInfo<T1, T2>& operator+= (const T1& r); // Compound assignment
 
    protected:
      int _displayed, _width;
      double _scale;
      T1 _current, _min, _max;
      T2 _progressprec, _progressmin, _progressmax;
      std::string _unit;
      std::ostream & _stream;
  };
 
  typedef ProgressInfo<double, double> Progression;
 
  template <class T1, class T2>
  inline std::ostream& operator<< (
    std::ostream &out, aims::ProgressInfo<T1, T2> &progression)
  {
    std::string p = progression.render();
 
    if ( !p.empty() )
      out << p;
 
    return out;
  }
 
}
 
 
// Comparison operators
template <class T1, class T2>
inline bool operator< (const aims::ProgressInfo<T1, T2>& l, const T1& r){return (l.current() < r);}
 
template <class T1, class T2>
inline bool operator< (const T1& l, const aims::ProgressInfo<T1, T2>& r){return (l < r.current());}
 
template <class T1, class T2>
inline bool operator> (const aims::ProgressInfo<T1, T2>& l, const T1& r){return (r < l);}
 
template <class T1, class T2>
inline bool operator> (const T1& l, const aims::ProgressInfo<T1, T2>& r){return (r < l);}
 
template <class T1, class T2>
inline bool operator<=(const aims::ProgressInfo<T1, T2>& l, const T1& r){return !(l > r);}
 
template <class T1, class T2>
inline bool operator<=(const T1& l, const aims::ProgressInfo<T1, T2>& r){return !(l > r);}
 
template <class T1, class T2>
inline bool operator>=(const aims::ProgressInfo<T1, T2>& l, const T1& r){return !(l < r);}
 
template <class T1, class T2>
inline bool operator>=(const T1& l, const aims::ProgressInfo<T1, T2>& r){return !(l < r);}
 
#endif