/usr/include/linbox/randiter/mersenne-twister.h is in liblinbox-dev 1.4.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2002 Bradford Hovinen
*
* Written by 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========
* ------------------------------------
*
* Header file for implementation of the Mersenne twister pseudo-random number
* generator, crated by Makoto Matsumoto and Takuji Nishimura. Further
* information on the Mersenne Twister can be found at
* http://www.math.keio.ac.jp/~matsumoto/emt.html [ dead link. -bds 2007feb]
*
* This forms the basic underlying algorithm for most psuedo-random number
* generation in LinBox.
*
* N.B. This module is tested in test-modular under the random number
* generator tests.
*/
#ifndef __LINBOX_mersenne_twister_H
#define __LINBOX_mersenne_twister_H
#include <vector>
#ifdef __LINBOX_HAVE_STDINT_H
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
// else ??
#endif
#include <stdint.h>
#ifndef INT32_MAX
#error "INT32_MAX is not defined. It should at least be defined in Givaro..."
#endif
#endif
namespace LinBox
{
class MersenneTwister {
public:
MersenneTwister (uint32_t seed = 0);
uint32_t reload (); // public?
// random in [0..2^32) ?
uint32_t randomInt ();
uint32_t randomInt () const
{ return const_cast<MersenneTwister&>(*this).randomInt();}
// random in [start..end).
uint32_t randomIntRange (uint32_t start, uint32_t end);
uint32_t randomIntRange (uint32_t start, uint32_t end) const
{ return const_cast<MersenneTwister&>(*this).randomIntRange(start,end); }
// random in [0..1] in some sense ?
double randomDouble ();
double randomDouble () const
{ return const_cast<MersenneTwister&>(*this).randomDouble(); }
// random in [start..end] in some sense ?
double randomDoubleRange (double start, double end)
{ return randomDouble () * (end - start) + start; }
double randomDoubleRange (double start, double end) const
{ return const_cast<MersenneTwister&>(*this).randomDoubleRange(start,end); }
void setSeed (uint32_t seed);
private:
std::vector<uint32_t> _state;
std::vector<uint32_t>::iterator _next;
int _left;
};
}
//#if defined(LinBoxSrcOnly) or defined(LinBoxTestOnly)
//#include "linbox/randiter/mersenne-twister.C"
//#endif
#endif // __LINBOX_mersenne_twister_H
// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,:0,t0,+0,=s
// Local Variables:
// mode: C++
// tab-width: 8
// indent-tabs-mode: nil
// c-basic-offset: 8
// End:
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