/usr/include/octave-4.2.2/octave/DET.h is in liboctave-dev 4.2.2-1ubuntu1.
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 | /*
Copyright (C) 2008-2017 Jaroslav Hajek
This file is part of Octave.
Octave 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.
Octave 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 Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if ! defined (octave_DET_h)
#define octave_DET_h 1
#include "octave-config.h"
#include <cmath>
#include "oct-cmplx.h"
#include "lo-mappers.h"
template <typename T>
class
base_det
{
public:
base_det (T c = 1, int e = 0)
: c2 (), e2 ()
{
c2 = octave::math::log2 (c, e2);
e2 += e;
}
base_det (T c, double e, double b)
: c2 (), e2 ()
{
e *= octave::math::log2 (b);
e2 = e;
c *= octave::math::exp2 (e - e2);
int f;
c2 = octave::math::log2 (c, f);
e2 += f;
}
base_det (const base_det& a) : c2 (a.c2), e2 (a.e2) { }
base_det& operator = (const base_det& a)
{
c2 = a.c2;
e2 = a.e2;
return *this;
}
T coef (void) const { return c2; }
int exp (void) const { return e2; }
T value () const { return c2 * static_cast<T> (std::ldexp (1.0, e2)); }
operator T () const { return value (); }
base_det square () const { return base_det (c2*c2, e2+e2); }
void operator *= (T t)
{
int e;
c2 *= octave::math::log2 (t, e);
e2 += e;
}
private:
T c2;
int e2;
};
// Provide the old types by typedefs.
typedef base_det<double> DET;
typedef base_det<float> FloatDET;
typedef base_det<Complex> ComplexDET;
typedef base_det<FloatComplex> FloatComplexDET;
#endif
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