/usr/include/linbox/randiter/nonzero.h is in liblinbox-dev 1.1.6~rc0-4.1.
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 | /* -*- mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* linbox/randiter/nonzero.h
* Copyright (C) 2001-2002 Bradford Hovinen
*
* Written by William J Turner <wjturner@math.ncsu.edu>,
* Bradford Hovinen <hovinen@cis.udel.edu>
*
* ------------------------------------
*
* See COPYING for license information.
*/
#ifndef __RANDITER_NONZERO_H
#define __RANDITER_NONZERO_H
#include "linbox/field/archetype.h"
#include "linbox/randiter/archetype.h"
#include "linbox/element/archetype.h"
#include "linbox/element/abstract.h"
#include "linbox/element/envelope.h"
#include "linbox/linbox-config.h"
#include <sys/time.h>
#include <stdlib.h>
#ifdef __LINBOX_XMLENABLED
#include "linbox/util/xml/linbox-reader.h"
#include "linbox/util/xml/linbox-writer.h"
#include <string>
#endif
namespace LinBox
{
/** Random iterator for nonzero random numbers
*
* Wraps around an existing random iterator and ensures that the output
* is entirely nonzero numbers.
**/
template <class Field, class RandIter = typename Field::RandIter>
class NonzeroRandIter
{
public:
typedef typename Field::Element Element;
NonzeroRandIter (const Field &F, const RandIter &r)
: _F (F), _r (r) {}
NonzeroRandIter (const NonzeroRandIter& R)
: _F (R._F), _r (R._r) {}
~NonzeroRandIter()
{}
NonzeroRandIter& operator=(const NonzeroRandIter& R)
{
if (this != &R) { // guard against self-assignment
_F = R._F;
_r = R._r;
}
return *this;
}
Element &random (Element &a) const
{
do _r.random (a); while (_F.isZero (a));
return a;
}
/** Random field element creator.
* This returns a random field element from the information supplied
* at the creation of the generator.
* Required by abstract base class.
* @return reference to random field element
*/
ElementAbstract &random (ElementAbstract &a) const
{
Element tmp;
random (tmp);
return (a = ElementEnvelope <Field> (tmp));
}
private:
Field _F;
RandIter _r;
}; // class NonzeroRandIter
} // namespace LinBox
#endif // __RANDITER_NONZERO_H
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