Reference documentation for deal.II version GIT relicensing-462-g03c82a14bd 2024-04-21 16:20:02+00:00
\(\newcommand{\dealvcentcolon}{\mathrel{\mathop{:}}}\) \(\newcommand{\dealcoloneq}{\dealvcentcolon\mathrel{\mkern-1.2mu}=}\) \(\newcommand{\jump}[1]{\left[\!\left[ #1 \right]\!\right]}\) \(\newcommand{\average}[1]{\left\{\!\left\{ #1 \right\}\!\right\}}\)
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cmath.h
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1// ------------------------------------------------------------------------
2//
3// SPDX-License-Identifier: LGPL-2.1-or-later
4// Copyright (C) 2018 - 2024 by the deal.II authors
5//
6// This file is part of the deal.II library.
7//
8// Part of the source code is dual licensed under Apache-2.0 WITH
9// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
10// governing the source code and code contributions can be found in
11// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
12//
13// ------------------------------------------------------------------------
14#ifndef dealii_cxx17_cmath_h
15#define dealii_cxx17_cmath_h
16
17#include <deal.II/base/config.h>
18
19#if defined(DEAL_II_HAVE_CXX17_BESSEL_FUNCTIONS) || \
20 defined(DEAL_II_HAVE_CXX17_LEGENDRE_FUNCTIONS)
21# include <cmath>
22#endif
23
24#ifndef DEAL_II_HAVE_CXX17_BESSEL_FUNCTIONS
25# include <boost/math/special_functions/bessel.hpp>
26#endif
27
28#ifndef DEAL_II_HAVE_CXX17_LEGENDRE_FUNCTIONS
30
31# include <boost/math/special_functions/legendre.hpp>
32
33# include <limits>
34#endif
35
36
38
39namespace std_cxx17
40{
41#ifndef DEAL_II_HAVE_CXX17_BESSEL_FUNCTIONS
42
43 inline double
44 cyl_bessel_j(double nu, double x)
45 {
46 return boost::math::cyl_bessel_j(nu, x);
47 }
48
49
50
51 inline float
52 cyl_bessel_jf(float nu, float x)
53 {
54 return boost::math::cyl_bessel_j(nu, x);
55 }
56
57#else
58 using std::cyl_bessel_j;
59 using std::cyl_bessel_jf;
60#endif
61
62#ifndef DEAL_II_HAVE_CXX17_LEGENDRE_FUNCTIONS
63
64 inline double
65 legendre(unsigned int l, double x)
66 {
67 Assert(static_cast<int>(l) >= 0,
68 ExcIndexRange(l, 0, std::numeric_limits<int>::max()));
69 return boost::math::legendre_p(static_cast<int>(l), x);
70 }
71
72
73
74 inline float
75 legendre(unsigned int l, float x)
76 {
77 Assert(static_cast<int>(l) >= 0,
78 ExcIndexRange(l, 0, std::numeric_limits<int>::max()));
79 return boost::math::legendre_p(static_cast<int>(l), x);
80 }
81
82
83
84 inline float
85 legendref(unsigned int l, float x)
86 {
87 Assert(static_cast<int>(l) >= 0,
88 ExcIndexRange(l, 0, std::numeric_limits<int>::max()));
89 return boost::math::legendre_p(static_cast<int>(l), x);
90 }
91
92#else
93 using std::legendre;
94 using std::legendref;
95#endif
96} // namespace std_cxx17
97
98
100
101#endif // dealii_cxx17_cmath_h
#define DEAL_II_NAMESPACE_OPEN
Definition config.h:502
#define DEAL_II_NAMESPACE_CLOSE
Definition config.h:503
#define Assert(cond, exc)
static ::ExceptionBase & ExcIndexRange(std::size_t arg1, std::size_t arg2, std::size_t arg3)
float legendref(unsigned int l, float x)
Definition cmath.h:85
double legendre(unsigned int l, double x)
Definition cmath.h:65