blitz Version 0.10
blitz/rand-dunif.h
Go to the documentation of this file.
00001 // -*- C++ -*-
00002 /***************************************************************************
00003  * blitz/rand-dunif.h    Discrete uniform generator
00004  *
00005  * $Id: rand-dunif.h,v 1.5 2011/03/25 22:41:16 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_RAND_DUNIF_H
00033 #define BZ_RAND_DUNIF_H
00034 
00035 #ifndef BZ_RANDOM_H
00036  #include <blitz/random.h>
00037 #endif
00038 
00039 #ifndef BZ_RAND_UNIFORM_H
00040  #include <blitz/rand-uniform.h>
00041 #endif
00042 
00043 #include <math.h>
00044 
00045 BZ_NAMESPACE(blitz)
00046 
00047 template<typename P_uniform BZ_TEMPLATE_DEFAULT(Uniform)>
00048 class DiscreteUniform {
00049 
00050 public:
00051     typedef int T_numtype;
00052     typedef P_uniform T_uniform;
00053 
00054     DiscreteUniform(int low, int high, double=0)
00055         : low_(low), range_(high-low+1)
00056     { 
00057     }
00058 
00059     void randomize() 
00060     { 
00061         uniform_.randomize();
00062     }
00063   
00064     int random()
00065     { 
00066         return int(uniform_.random() * range_ + low_);
00067     } 
00068 
00069 private:
00070     int low_, range_;
00071     T_uniform uniform_;
00072 };
00073 
00074 BZ_NAMESPACE_END
00075 
00076 #endif // BZ_RAND_DUNIF_H
00077 
 All Classes Files Functions Variables Typedefs Enumerations Enumerator Friends Defines