/usr/include/linbox/randiter/gmp-rational.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 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 | /* -*- mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* linbox/randiter/gmp-rational.h
* Copyright (C) 2001-2002 Bradford Hovinen
*
* Written by William J Turner <wjturner@acm.org>,
* Bradford Hovinen <hovinen@cis.udel.edu>
*
* This library 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 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __RANDITER_GMP_RATIONAL_H
#define __RANDITER_GMP_RATIONAL_H
#include "linbox/field/gmp-rational.h"
#include "linbox/element/gmp-rational.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
{
class GMPRationalRandIter
{
public:
typedef GMPRationalElement Element;
GMPRationalRandIter (const GMPRationalField &F,
const integer &size = 0,
const integer &seed = 0)
: _F (F), _size (size), _seed (seed)
{
if (seed == 0)
_seed = time (NULL);
}
GMPRationalRandIter (const GMPRationalRandIter& R)
: _F (R._F), _size (R._size), _seed (R._seed) {}
#ifdef __LINBOX_XMLENABLED
GMPRationalRandIter(LinBox::Reader &R) : _F(R.Down(1))
{
R.Up(1);
if(!R.expectTagName("randiter")) return;
if(!R.expectAttributeNum("seed", _seed) || !R.expectAttributeNum("size", _size)) return;
if(_seed == 0) _seed = time( NULL);
return;
}
#endif
~GMPRationalRandIter()
{}
GMPRationalRandIter& operator=(const GMPRationalRandIter& R)
{
if (this != &R) { // guard against self-assignment
_F = R._F;
_seed = R._seed;
_size = R._size;
}
return *this;
}
Element &random (Element &a) const
{
unsigned int s;
int value = 0;
if (_size == 0) {
s = _seed;
value = rand_r (&s);
mpz_set_si (mpq_numref (a.rep), value);
do {
value = rand_r (&s);
} while (value == 0);
const_cast<integer&>(_seed) = s;
mpz_set_si (mpq_denref (a.rep), value);
}
else {
unsigned int s;
int num, den;
s = _seed;
num = rand_r (&s);
if (_size > 0) {
unsigned long tmp = _size;
num %= tmp;
den = 1L;
} else {
den = rand_r (&s);
}
const_cast<integer&>(_seed) = s;
mpz_set_si (mpq_numref (a.rep), num);
mpz_set_si (mpq_denref (a.rep), den);
}
mpq_canonicalize (a.rep);
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 <GMPRationalField> (tmp));
}
private:
GMPRationalField _F;
integer _size;
integer _seed;
}; // class GMPRationalRandIter
} // namespace LinBox
#endif // __RANDITER_GMP_RANDOM_H
|