00001 /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */ 00002 /* 00003 * Copyright (c) 1995 Regents of the University of California. 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions 00008 * are met: 00009 * 1. Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * 2. Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * 3. All advertising materials mentioning features or use of this software 00015 * must display the following acknowledgement: 00016 * This product includes software developed by the Computer Systems 00017 * Engineering Group at Lawrence Berkeley Laboratory. 00018 * 4. Neither the name of the University nor of the Laboratory may be used 00019 * to endorse or promote products derived from this software without 00020 * specific prior written permission. 00021 * 00022 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00023 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00024 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00025 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00026 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00027 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00028 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00029 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00030 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00031 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00032 * SUCH DAMAGE. 00033 * 00034 * @(#) $Header: /cvsroot/nsnam/ns-2/tools/random.h,v 1.16 1999/10/09 01:06:39 haoboy Exp $ (LBL) 00035 */ 00036 00037 #ifndef ns_random_h 00038 #define ns_random_h 00039 00040 #include <math.h> 00041 #include "config.h" 00042 #include "rng.h" 00043 00044 class Random { 00045 private: 00046 static RNG *rng() { return RNG::defaultrng(); } 00047 00048 public: 00049 static void seed(int s) { rng()->set_seed(RNG::RAW_SEED_SOURCE, s); } 00050 static int seed_heuristically() { rng()->set_seed(RNG::HEURISTIC_SEED_SOURCE); return rng()->seed(); }; 00051 00052 static int random() { return rng()->uniform_positive_int(); } 00053 static double uniform() { return rng()->uniform_double();} 00054 static double uniform(double r) { return rng()->uniform(r); } 00055 static double uniform(double a, double b) { return rng()->uniform(a,b); } 00056 static double exponential() { return rng()->exponential(); } 00057 static int integer(int k) { return rng()->uniform(k); } 00058 static double exponential(double r) { return rng()->exponential(r); } 00059 static double pareto(double scale, double shape) { return rng()->pareto(scale, shape); } 00060 static double paretoII(double scale, double shape) { return rng()->paretoII(scale, shape);} 00061 static double normal(double avg, double std) { return rng()->normal(avg, std); } 00062 static double lognormal(double avg, double std) { return rng()->lognormal(avg, std); } 00063 }; 00064 00065 #endif