/usr/include/linbox/randiter/nonzero.h is in liblinbox-dev 1.3.2-1.1+b1.
This file is owned by root:root, with mode 0o644.
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* Copyright (C) 2001-2002 Bradford Hovinen
*
* Written by William J Turner <wjturner@math.ncsu.edu>,
* Bradford Hovinen <hovinen@cis.udel.edu>
*
* ------------------------------------
*
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*.
*/
#ifndef __LINBOX_randiter_nonzero_H
#define __LINBOX_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>
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) :
_field (F), _r (r)
{}
NonzeroRandIter (const NonzeroRandIter& R) :
_field (R._field), _r (R._r)
{}
~NonzeroRandIter()
{}
NonzeroRandIter& operator=(const NonzeroRandIter& R)
{
if (this != &R) { // guard against self-assignment
_field = R._field;
_r = R._r;
}
return *this;
}
template<class Elt>
Elt &random (Elt &a) const
{
do _r.random (a); while (_field.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 _field;
RandIter _r;
}; // class NonzeroRandIter
} // namespace LinBox
#endif // __LINBOX_randiter_nonzero_H
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