/usr/include/fflas-ffpack/field/modular-randiter.h is in fflas-ffpack-common 1.6.0-1.
This file is owned by root:root, with mode 0o644.
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// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
/* field/modular-randiter.h
* Copyright (C) 2008 Clement Pernet
*
* Written by Clement Pernet <clement.pernet@gmail.com>
*
* ------------------------------------
*
*
* ========LICENCE========
* This file is part of the library FFLAS-FFPACK.
*
* FFLAS-FFPACK 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 __FFLASFFPACK_modular_randiter_H
#define __FFLASFFPACK_modular_randiter_H
#include <sys/time.h>
#include <stdlib.h>
#include <limits>
namespace FFPACK {
template< class Element >
class Modular;
template <class Element>
class ModularRandIter {
public:
ModularRandIter (const Modular<Element> &F) :
_F(F)
{
struct timeval tp;
gettimeofday(&tp, 0) ;
long _seed = (long)(tp.tv_usec);
srand48(_seed);
}
ModularRandIter (const ModularRandIter<Element> &R) :
_F (R._F)
{}
/*! @bug not so random... (at all) */
Element &random (Element &a) const
{
return _F.init(a,(double)(lrand48()-std::numeric_limits<long>::max()));
}
private:
Modular<Element> _F;
};
template <class T>
class ModularBalanced;
template <class Element>
class ModularBalancedRandIter {
public:
ModularBalancedRandIter (const ModularBalanced<Element> &F):_F(F){}
ModularBalancedRandIter (const ModularBalancedRandIter<Element> &R) :
_F (R._F)
{}
Element &random (Element &a) const
{
return _F.init(a,(double)rand());
}
private:
ModularBalanced<Element> _F;
};
} // FFPACK
#endif // __FFLASFFPACK_modular_randiter_H
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