cspline.h

/***************************************************************************
        Copyright (C) 2002-2015 Kentaro Kitagawa
                           kitagawa@phys.s.u-tokyo.ac.jp
        
        This program is free software; you can redistribute it and/or
        modify it under the terms of the GNU Library General Public
        License as published by the Free Software Foundation; either
        version 2 of the License, or (at your option) any later version.
        
        You should have received a copy of the GNU Library General 
        Public License and a list of authors along with this program; 
        see the files COPYING and AUTHORS.
***************************************************************************/
#ifndef CSPLINE_H_
#define CSPLINE_H_

#include "support.h"

#include <map>
#include <gsl/gsl_interp.h>
#include <gsl/gsl_spline.h>

//! Wrapper class for cubic (natural) spline approximation.
class DECLSPEC_KAME CSplineApprox {
public:
    CSplineApprox(const std::map<double, double> &pts);
    ~CSplineApprox();
    //! Do spline approx.
    double approx(double x) const;
private:
    gsl_interp_accel *m_accel;
    gsl_spline *m_spline;
};

#endif /*CSPLINE_H_*/