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misc
random.hh
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// -*- coding: utf-8 -*-
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// Copyright (C) 2013 Laboratoire de Recherche et Développement
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// de l'Epita (LRDE).
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// Copyright (C) 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
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// département Systèmes Répartis Coopératifs (SRC), Université Pierre
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// et Marie Curie.
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//
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// This file is part of Spot, a model checking library.
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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef SPOT_MISC_RANDOM_HH
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# define SPOT_MISC_RANDOM_HH
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# include "common.hh"
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# include <cmath>
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namespace
spot
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{
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SPOT_API
void
srand
(
unsigned
int
seed);
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SPOT_API
int
rrand
(
int
min,
int
max);
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SPOT_API
int
mrand
(
int
max);
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SPOT_API
double
drand
();
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SPOT_API
double
nrand
();
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SPOT_API
double
bmrand
();
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template
<
double
(*gen)()>
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class
barand
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{
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public
:
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barand
(
int
n,
double
p)
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: n_(n), m_(n * p), s_(sqrt(n * p * (1 - p)))
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{
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}
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int
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rand()
const
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{
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int
res;
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for
(;;)
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{
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double
x = gen() * s_ + m_;
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if
(x < 0.0)
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continue
;
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res =
static_cast<
int
>
(x);
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if
(res <= n_)
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break
;
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}
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return
res;
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}
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protected
:
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const
int
n_;
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const
double
m_;
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const
double
s_;
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};
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SPOT_API
int
prand
(
double
p);
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}
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#endif // SPOT_MISC_RANDOM_HH
Please direct any
question
,
comment
, or
bug report
to the Spot mailing list at
spot@lrde.epita.fr
.
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