mirror of
https://gitlab.com/libeigen/eigen.git
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3036eeca0a
release of tvmet (inactive for 2 years and developer unreachable) as the basis for eigen2, because it provides seemingly good expression template mechanisms, we want that, and it would take years to reinvent that wheel. We'll see. So this commit imports the last tvmet release.
101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
/*
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* Tiny Vector Matrix Library
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* Dense Vector Matrix Libary of Tiny size using Expression Templates
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*
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* Copyright (C) 2001 - 2003 Olaf Petzold <opetzold@users.sourceforge.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: Random.h,v 1.3 2004/09/16 09:14:18 opetzold Exp $
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*/
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#ifndef TVMET_UTIL_RANDOM_H
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#define TVMET_UTIL_RANDOM_H
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#include <tvmet/CompileTimeError.h>
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namespace tvmet {
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namespace util {
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/**
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* \class Random Random.h "tvmet/util/Random.h"
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* \brief A simple random class.
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* On each access this class returns a new random number using
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* std::rand(). The range generated is templated by MIN and
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* MAX.
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* \ingroup _util_function
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*
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* \par Example:
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* \code
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* #include <algorithm>
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*
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* tvmet::Random<int, 0, 100> random;
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*
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* std::generate(m1.begin(), m1.end(), random());
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* \endcode
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*/
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template<class T, int MIN=0, int MAX=100>
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class Random {
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static unsigned int s_seed;
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public:
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typedef T value_type;
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Random() { TVMET_CT_CONDITION(MIN<MAX, wrong_random_range) }
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value_type operator()() {
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s_seed += (unsigned)std::time(0);
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std::srand(s_seed);
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return MIN + int(double(MAX) * std::rand()/(double(RAND_MAX)+1.0));
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}
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};
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// instance
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template<class T, int MIN, int MAX>
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unsigned int Random<T, MIN, MAX>::s_seed;
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#if defined(TVMET_HAVE_COMPLEX)
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/**
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* \class Random< std::complex<T> > Random.h "tvmet/util/Random.h"
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* \brief Specialized Random class.
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* \ingroup _util_function
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*/
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template<class T, int MIN=0, int MAX=100>
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class Random {
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static unsigned int s_seed;
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public:
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typedef std::complex<T> value_type;
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Random() { TVMET_CT_CONDITION(MIN<MAX, wrong_random_range) }
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value_type operator()() {
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s_seed += (unsigned)std::time(0);
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std::srand(s_seed);
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return MIN + int(double(MAX) * std::rand()/(double(RAND_MAX)+1.0));
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}
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};
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// instance
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template<class T, int MIN, int MAX>
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unsigned int Random<std::complex<T>, MIN, MAX>::s_seed;
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#endif // defined(TVMET_HAVE_COMPLEX)
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} // namespace util
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} // namespace tvmet
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#endif // TVMET_UTIL_RANDOM_H
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// Local Variables:
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// mode:C++
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// End:
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