/usr/include/CLHEP/GenericFunctions/Bessel.icc is in libclhep-dev 2.1.4.1+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | // -*- C++ -*-
// $Id:
#include "gsl/gsl_sf_bessel.h"
#include <cmath>
#include <signal.h>
#include <assert.h>
#define GF_DBL_EPSILON 2.2204460492503131e-16
namespace Genfun {
namespace IntegralOrder {
FUNCTION_OBJECT_IMP(Bessel)
inline
Bessel::Bessel(Type type, unsigned int order):
_type(type),_order(order)
{
}
inline
Bessel::~Bessel() {
}
inline
Bessel::Bessel(const Bessel & right):
_type(right._type),
_order(right._order)
{
}
inline
double Bessel::operator() (double x) const {
gsl_sf_result result;
if (_type==J) {
int status = gsl_sf_bessel_Jn_e(_order, x, &result);
if (status!=0) {
std::cerr << "Warning, GSL function gsl_sf_bessel_Jn_impl"
<< " return code" << status << std::endl;
raise(SIGFPE);
}
return result.val;
}
else if (_type==Y) {
int status = gsl_sf_bessel_Yn_e(_order, x, &result);
if (status!=0) {
std::cerr << "Warning, GSL function gsl_sf_bessel_Yn_impl"
<< " return code" << status << std::endl;
raise(SIGFPE);
}
return result.val;
}
else {
return 0;
}
}
} // end namespace IntegralOrder
namespace FractionalOrder {
FUNCTION_OBJECT_IMP(Bessel)
inline
Bessel::Bessel(Type type):
_type(type),
_order("Order", 0.0,-10,10)
{
}
inline
Bessel::~Bessel() {
}
inline
Bessel::Bessel(const Bessel & right):
_type(right._type),
_order(right._order)
{
}
inline
Parameter & Bessel::order() {
return _order;
}
inline
const Parameter & Bessel::order() const {
return _order;
}
inline
double Bessel::operator() (double x) const {
gsl_sf_result result;
if (_type==J) {
int status = gsl_sf_bessel_Jnu_e(_order.getValue(), x, &result);
if (status!=0) {
std::cerr << "Warning, GSL function gsl_sf_bessel_Jnu_impl"
<< " return code" << status << std::endl;
raise(SIGFPE);
}
return result.val;
}
else if (_type==Y) {
int status = gsl_sf_bessel_Ynu_e(_order.getValue(), x, &result);
if (status!=0) {
std::cerr << "Warning, GSL function gsl_sf_bessel_Ynu_impl"
<< " return code" << status << std::endl;
raise(SIGFPE);
}
return result.val;
}
return result.val;
}
} // end namespace FractionalOrder
} // end namespace Genfun
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