/usr/include/madness/mra/power.h is in libmadness-dev 0.10.1~gite4aa500e-10.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | /*
This file is part of MADNESS.
Copyright (C) 2007,2010 Oak Ridge National Laboratory
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
For more information please contact:
Robert J. Harrison
Oak Ridge National Laboratory
One Bethel Valley Road
P.O. Box 2008, MS-6367
email: harrisonrj@ornl.gov
tel: 865-241-3937
fax: 865-572-0680
$Id$
*/
#ifndef MADNESS_MRA_POWER_H__INCLUDED
#define MADNESS_MRA_POWER_H__INCLUDED
namespace madness {
template <int D>
inline int power(int base = 2) {
return (int) std::pow((double) base, (int) D);
}
template <>
inline int power<0>(int base) {
return 1;
}
template <>
inline int power<1>(int base) {
return base;
}
template <>
inline int power<2>(int base) {
return (int)(base*base);
}
template <>
inline int power<3>(int base) {
return (int)(base*base*base);
}
template <>
inline int power<4>(int base) {
return power<2>(power<2>(base));
}
template <>
inline int power<5>(int base) {
return (power<2>(base)*power<3>(base));
}
template <>
inline int power<6>(int base) {
return power<2>(power<3>(base));
}
template <>
inline int power<7>(int base) {
return (power<4>(base)*power<3>(base));
}
template <>
inline int power<8>(int base) {
return (power<2>(power<4>(base)));
}
template <>
inline int power<9>(int base) {
return (power<3>(power<3>(base)));
}
template <>
inline int power<10>(int base) {
return (power<2>(power<5>(base)));
}
template <>
inline int power<12>(int base) {
return (power<3>(power<4>(base)));
}
// Florian: following code from the internet (stackoverflow)
namespace detail {
template<class T, int N>
struct helper {
static T pow(const T x){
return helper<T, N-1>::pow(x) * x;
}
};
template<class T>
struct helper<T, 1> {
static T pow(const T x){
return x;
}
};
template<class T>
struct helper<T, 0> {
static T pow(const T x){
return 1;
}
};
}
template<int N, class T>
T power(T const x) {
return detail::helper<T, N>::pow(x);
}
}
#endif
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