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tvmet/util/Random.h
- Committer:
- madcowswe
- Date:
- 2013-04-17
- Revision:
- 90:e4164bb8c60e
- Parent:
- 15:9c5aaeda36dc
File content as of revision 90:e4164bb8c60e:
/* * Tiny Vector Matrix Library * Dense Vector Matrix Libary of Tiny size using Expression Templates * * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * $Id: Random.h,v 1.7 2007-06-23 15:58:59 opetzold Exp $ */ #ifndef TVMET_UTIL_RANDOM_H #define TVMET_UTIL_RANDOM_H #include <tvmet/CompileTimeError.h> namespace tvmet { namespace util { /** * \class Random Random.h "tvmet/util/Random.h" * \brief A simple random class. * On each access this class returns a new random number using * std::rand(). The range generated is templated by MIN and * MAX. * \ingroup _util_function * * \par Example: * \code * #include <algorithm> * * tvmet::Random<int, 0, 100> random; * * std::generate(m1.begin(), m1.end(), random()); * \endcode */ template<class T, int MIN=0, int MAX=100> class Random { static unsigned int s_seed; public: typedef T value_type; Random() { TVMET_CT_CONDITION(MIN<MAX, wrong_random_range) } value_type operator()() { s_seed += (unsigned)std::time(0); std::srand(s_seed); return MIN + int(double(MAX) * std::rand()/(double(RAND_MAX)+1.0)); } }; // instance template<class T, int MIN, int MAX> unsigned int Random<T, MIN, MAX>::s_seed; #if defined(TVMET_HAVE_COMPLEX) /** * \class Random< std::complex<T> > Random.h "tvmet/util/Random.h" * \brief Specialized Random class. * \ingroup _util_function */ template<class T, int MIN=0, int MAX=100> class Random { static unsigned int s_seed; public: typedef std::complex<T> value_type; Random() { TVMET_CT_CONDITION(MIN<MAX, wrong_random_range) } value_type operator()() { s_seed += (unsigned)std::time(0); std::srand(s_seed); return MIN + int(double(MAX) * std::rand()/(double(RAND_MAX)+1.0)); } }; // instance template<class T, int MIN, int MAX> unsigned int Random<std::complex<T>, MIN, MAX>::s_seed; #endif // defined(TVMET_HAVE_COMPLEX) } // namespace util } // namespace tvmet #endif // TVMET_UTIL_RANDOM_H // Local Variables: // mode:C++ // tab-width:8 // End: