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/*
* Copyright (C) 2010,2011 Thorsten Liebig (Thorsten.Liebig@gmx.de)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "CSFunctionParser.h"
#include <math.h>
#include <iostream>
double bessel_first_kind_0(const double* p)
{
return j0(p[0]);
}
double bessel_first_kind_1(const double* p)
{
return j1(p[0]);
}
double bessel_first_kind_n(const double* p)
{
int n=p[0];
if (n<0)
{
std::cerr << "CSFunctionParser::bessel_first_kind_n (jn): first argument must be integer larger than zero! found: " << p[0] << std::endl;
return 0;
}
return jn(n,p[1]);
}
double bessel_second_kind_0(const double* p)
{
return y0(p[0]);
}
double bessel_second_kind_1(const double* p)
{
return y1(p[0]);
}
double bessel_second_kind_n(const double* p)
{
int n=p[0];
if (n<0)
{
std::cerr << "CSFunctionParser::bessel_second_kind_n (yn): first argument must be integer larger than zero! found: " << p[0] << std::endl;
return 0;
}
return yn(n,p[1]);
}
CSFunctionParser::CSFunctionParser()
{
//some usefull constants
AddConstant("pi", 3.14159265358979323846);
AddConstant("e", 2.71828182845904523536);
//some bessel functions of first kind
AddFunction("j0",bessel_first_kind_0,1);
AddFunction("j1",bessel_first_kind_1,1);
AddFunction("jn",bessel_first_kind_n,2);
//some bessel functions of second kind
AddFunction("y0",bessel_second_kind_0,1);
AddFunction("y1",bessel_second_kind_1,1);
AddFunction("yn",bessel_second_kind_n,2);
}
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