math_Rational.h

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#ifndef MATH_RATIONAL_INCLUDED
#define MATH_RATIONAL_INCLUDED

#include <fstream>
#include <cmath>
#include <cassert>

#include "Parameters/parameters.h"
#include "Parameters/commonParameters.h"

#include "IO/bridgeIO.h"
using Bridge::vout;


class Math_Rational
{
 public:
  static const std::string class_name;

 protected:
  Bridge::VerboseLevel m_vl;

 private:
  int                 m_Np, m_n_exp, m_d_exp;
  double              m_x_min, m_x_max;
  double              m_norm, m_error;
  std::vector<double> m_res;
  std::vector<double> m_pole;

 public:
  Math_Rational()
    : m_vl(CommonParameters::Vlevel()) {}

  void set_parameters(const Parameters& params);
  void set_parameters(const int Np, const int n_exp, const int d_exp,
                      const double x_min, const double x_max);

  void get_parameters(double& norm, std::vector<double>& res,
                      std::vector<double>& pole);

  void set_parameter_verboselevel(const Bridge::VerboseLevel vl) { m_vl = vl; }

  double func(double x);

 private:
  void set_coeff();
  void read_file();
};
#endif