random.h
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- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright (c) 1995 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the Computer Systems
- * Engineering Group at Lawrence Berkeley Laboratory.
- * 4. Neither the name of the University nor of the Laboratory may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#) $Header: /cvsroot/nsnam/nam-1/random.h,v 1.2 1998/10/04 23:00:17 haoboy Exp $ (LBL)
- */
- #ifndef ns_random_h
- #define ns_random_h
- #include <math.h>
- #include "config.h"
- #include "rng.h"
- class Random {
- private:
- static RNG *rng() { return RNG::defaultrng(); }
- public:
- static void seed(int s) { rng()->set_seed(RNG::RAW_SEED_SOURCE, s); }
- static int seed_heuristically() { rng()->set_seed(RNG::HEURISTIC_SEED_SOURCE); return rng()->seed(); };
- static int random() { return rng()->uniform_positive_int(); }
- static double uniform() { return rng()->uniform_double();}
- static double uniform(double r) { return rng()->uniform(r); }
- static double uniform(double a, double b) { return rng()->uniform(a,b); }
- static double exponential() { return rng()->exponential(); }
- static int integer(int k) { return rng()->uniform(k); }
- static double exponential(double r) { return rng()->exponential(r); }
- static double pareto(double scale, double shape) { return rng()->pareto(scale, shape); }
- };
- #endif