This file is indexed.

/usr/include/Rivet/Math/eigen/util.h is in librivet-dev 1.8.3-1.1.

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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
//
// Eigen 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 or (at your option) any later version.
//
// Eigen 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 Eigen; if not, write to the Free Software Foundation, Inc., 51
// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. This exception does not invalidate any other reasons why a work
// based on this file might be covered by the GNU General Public License.

/** \file util.h
  * \brief Internal file
  */

#ifndef EIGEN_UTIL_H
#define EIGEN_UTIL_H

#include <cstdlib>
#include <cmath>
#include <complex>
#include <iostream>
#include <cassert>

#ifdef __GNUC__
# if __GNUC__>=4
#  define EIGEN_WITH_GCC_4_OR_LATER
# endif
#endif

namespace Eigen
{

namespace Util
{

/** Stores in x a random float between -1.0 and 1.0 */
inline void pickRandom( float & x )
{
    x = 2.0f * rand() / RAND_MAX - 1.0f;
}

/** Stores in x a random double between -1.0 and 1.0 */
inline void pickRandom( double & x )
{
    x = 2.0 * rand() / RAND_MAX - 1.0;
}

/** Stores in the real and imaginary parts of x
  * random values between -1.0 and 1.0 */
template<typename T> void pickRandom( std::complex<T> & x )
{
#ifdef EIGEN_WITH_GCC_4_OR_LATER
    pickRandom( x.real() );
    pickRandom( x.imag() );
#else // workaround by David Faure for MacOS 10.3 and GCC 3.3, commit 630812
    T r = x.real();
    T i = x.imag();
    pickRandom( r );
    pickRandom( i );
    x = std::complex<T>(r,i);
#endif
}

template<typename T> inline T epsilon() { return static_cast<T>(0); }
template<> inline float epsilon<float>() { return 1e-5f; }
template<> inline double epsilon<double>() { return 1e-11; }
template<> inline std::complex<float> epsilon<std::complex<float> >()
{ return static_cast<std::complex<float> >(1e-5f); }
template<> inline std::complex<double> epsilon<std::complex<double> >()
{ return static_cast<std::complex<double> >(1e-11); }

inline float abs2( const float& x ) { return x * x; }
inline double abs2( const double& x ) { return x * x; }
inline float abs2( const std::complex<float>& x ) { return norm(x); }
inline double abs2( const std::complex<double>& x ) { return norm(x); }

/**
  * overloaded function that returns the complex conjugate of a float x.
  * Of course, as floats are reals, this is just the trivial function
  * returning x. But that'll become useful to handle matrices of complex
  * numbers.
  */
inline float conj( const float& x )
{
    return x;
}

/**
  * overloaded function that returns the complex conjugate of a double x.
  * Of course, as doubles are reals, this is just the trivial function
  * returning x. But that'll become useful to handle matrices of complex
  * numbers.
  */
inline double conj( const double& x )
{
    return x;
}

/**
  * overloaded function that returns the complex conjugate of a complex x.
  */
template<typename T>
std::complex<T> conj( const std::complex<T> & x )
{
    return std::conj(x);
}

/**
  * Short version: returns true if the absolute value of \a a is much smaller
  * than that of \a b, false otherwise.
  *
  * Long version: returns ( abs(a) <= abs(b) * epsilon(b) ).
  *
  * This function uses the epsilon overloaded function
  * to determine what's "small".
  */
template<typename T> bool isNegligible( const T& a, const T& b )
{
    return( std::abs(a) <= std::abs(b) * std::abs(epsilon<T>()) );
}

/**
  * Returns true if a is very close to b, false otherwise.
  *
  * In other words: returns abs( a - b ) <= min( abs(a), abs(b) ) * epsilon(b).
  *
  * @param a,b can be real or complex numbers (std::complex).
  */
template<typename T> bool isApprox( const T& a, const T& b )
{
    return( std::abs( a - b )
         <= std::min( std::abs(a), std::abs(b) ) * epsilon<T>() );
}

#define EIGEN_MAKE_FIXEDSIZE_TYPEDEFS(Class) \
    typedef Class<double, 2>               Class##2d;\
    typedef Class<double, 3>               Class##3d;\
    typedef Class<double, 4>               Class##4d;\
    typedef Class<float,  2>               Class##2f;\
    typedef Class<float,  3>               Class##3f;\
    typedef Class<float,  4>               Class##4f;\
    typedef Class<std::complex<double>, 2> Class##2cd;\
    typedef Class<std::complex<double>, 3> Class##3cd;\
    typedef Class<std::complex<double>, 4> Class##4cd;\
    typedef Class<std::complex<float>,  2> Class##2cf;\
    typedef Class<std::complex<float>,  3> Class##3cf;\
    typedef Class<std::complex<float>,  4> Class##4cf;

#define EIGEN_MAKE_DYNAMICSIZE_TYPEDEFS(Class) \
    typedef Class<double>                 Class##d;\
    typedef Class<float>                  Class##f;\
    typedef Class< std::complex<double> > Class##cd;\
    typedef Class< std::complex<float> >  Class##cf;

} // namespace Util

} // namespace Eigen

#endif // EIGEN_UTIL_H

/** @defgroup vectors Vectors*/
/** @defgroup matrices Matrices*/
/** @defgroup fixedsize Fixed-size classes*/
/** @defgroup dynamicsize Dynamic-size classes*/
/** @defgroup solving Solving systems of equations*/
/** @defgroup regression Linear regression analysis*/
/** @defgroup ludecomp LU Decomposition*/
/** @defgroup projective Projective geometry*/
/** @defgroup internalbases Internal stuff*/