/usr/include/itpp/base/math/misc.h is in libitpp-dev 4.3.1-2.
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 | /*!
* \file
* \brief Miscellaneous functions - header file
* \author Tony Ottosson, Adam Piatyszek and Conrad Sanderson
*
* -------------------------------------------------------------------------
*
* Copyright (C) 1995-2010 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ 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 3 of the License, or (at your option) any
* later version.
*
* IT++ 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 IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef MISC_H
#define MISC_H
#include <complex>
#include <string>
#include <limits>
#include <itpp/itexports.h>
namespace std
{
//! Output stream operator for complex numbers
template <class T>
std::ostream& operator<<(std::ostream &os, const std::complex<T> &x)
{
os << x.real();
ios::fmtflags saved_format = os.setf(ios::showpos);
os << x.imag();
os.setf(saved_format, ios::showpos);
return os << 'i';
}
//! Input stream operator for complex numbers
template <class T>
std::istream& operator>>(std::istream &is, std::complex<T> &x)
{
T re, im;
char c;
is >> c;
if (c == '(') {
is >> re >> c;
if (c == ',') {
is >> im >> c;
if (c == ')') {
x = complex<T>(re, im);
}
else {
is.setstate(ios_base::failbit);
}
}
else if (c == ')') {
x = complex<T>(re, T(0));
}
else {
is.setstate(ios_base::failbit);
}
}
else {
is.putback(c);
is >> re;
if (!is.eof() && ((c = static_cast<char>(is.peek())) == '+' || c == '-')) {
is >> im >> c;
if (c == 'i') {
x = complex<T>(re, im);
}
else {
is.setstate(ios_base::failbit);
}
}
else {
x = complex<T>(re, T(0));
}
}
return is;
}
} // namespace std
//! itpp namespace
namespace itpp
{
//! Constant Pi
const double pi = 3.14159265358979323846;
//! Constant 2*Pi
const double m_2pi = 2 * pi;
//! Constant eps
const double eps = std::numeric_limits<double>::epsilon();
//! \addtogroup miscfunc
//!@{
//! Return true if x is an integer
inline bool is_int(double x)
{
double dummy;
return (modf(x, &dummy) == 0.0);
}
//! Return true if x is an even integer
inline bool is_even(int x) { return ((x&1) == 0); }
//! Returns IT++ library version number, e.g. "3.7.1".
ITPP_EXPORT std::string itpp_version();
//! Returns true if machine endianness is BIG_ENDIAN
ITPP_EXPORT bool is_bigendian();
//! This function is deprecated. Please use is_bigendian() instead.
inline bool check_big_endianness() { return is_bigendian(); }
//!@}
} //namespace itpp
#endif // #ifndef MISC_H
|