blitz Version 0.10
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00001 // -*- C++ -*- 00002 /*************************************************************************** 00003 * random/discrete-uniform.h Discrete uniform IRNG wrapper class 00004 * 00005 * $Id: discrete-uniform.h,v 1.5 2011/03/25 22:41:17 julianc Exp $ 00006 * 00007 * Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org> 00008 * 00009 * This file is a part of Blitz. 00010 * 00011 * Blitz is free software: you can redistribute it and/or modify 00012 * it under the terms of the GNU Lesser General Public License 00013 * as published by the Free Software Foundation, either version 3 00014 * of the License, or (at your option) any later version. 00015 * 00016 * Blitz is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00019 * GNU Lesser General Public License for more details. 00020 * 00021 * You should have received a copy of the GNU Lesser General Public 00022 * License along with Blitz. If not, see <http://www.gnu.org/licenses/>. 00023 * 00024 * Suggestions: blitz-devel@lists.sourceforge.net 00025 * Bugs: blitz-support@lists.sourceforge.net 00026 * 00027 * For more information, please see the Blitz++ Home Page: 00028 * https://sourceforge.net/projects/blitz/ 00029 * 00030 ***************************************************************************/ 00031 00032 #ifndef BZ_RANDOM_DISCRETE_UNIFORM_H 00033 #define BZ_RANDOM_DISCRETE_UNIFORM_H 00034 00035 #include <random/default.h> 00036 00037 BZ_NAMESPACE(ranlib) 00038 00039 template<typename T = unsigned int, typename IRNG = defaultIRNG, 00040 typename stateTag = defaultState> 00041 class DiscreteUniform : public IRNGWrapper<IRNG,stateTag> 00042 { 00043 public: 00044 typedef T T_numtype; 00045 00046 DiscreteUniform(T n) 00047 { 00048 BZPRECONDITION(n < 4294967295U); 00049 n_ = n; 00050 } 00051 00052 DiscreteUniform(T n, unsigned int i) : 00053 IRNGWrapper<IRNG,stateTag>::IRNGWrapper(i) 00054 { 00055 BZPRECONDITION(n < 4294967295U); 00056 n_ = n; 00057 } 00058 00059 T random() 00060 { 00061 return this->irng_.random() % n_; 00062 } 00063 00064 private: 00065 T n_; 00066 }; 00067 00068 BZ_NAMESPACE_END 00069 00070 #endif // BZ_RANDOM_DISCRETE_UNIFORM_H