author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:01:42 +0200 | |
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/* boost random/random_number_generator.hpp header file |
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* |
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* Copyright Jens Maurer 2000-2001 |
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* Distributed under the Boost Software License, Version 1.0. (See |
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* accompanying file LICENSE_1_0.txt or copy at |
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* http://www.boost.org/LICENSE_1_0.txt) |
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* |
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* See http://www.boost.org for most recent version including documentation. |
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* |
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* $Id: random_number_generator.hpp,v 1.5 2004/11/09 21:22:00 jmaurer Exp $ |
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* |
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* Revision history |
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* 2001-02-18 moved to individual header files |
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*/ |
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#ifndef BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP |
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#define BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP |
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#include <boost/config.hpp> |
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#include <boost/limits.hpp> |
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#include <boost/static_assert.hpp> |
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#include <boost/random/uniform_int.hpp> |
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#include <boost/random/variate_generator.hpp> |
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namespace boost { |
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// a model for RandomNumberGenerator std:25.2.11 [lib.alg.random.shuffle] |
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template<class UniformRandomNumberGenerator, class IntType = long> |
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class random_number_generator |
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{ |
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public: |
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typedef UniformRandomNumberGenerator base_type; |
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typedef IntType argument_type; |
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typedef IntType result_type; |
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random_number_generator(base_type& rng) : _rng(rng) |
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{ |
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#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS |
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BOOST_STATIC_ASSERT(std::numeric_limits<result_type>::is_integer); |
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#endif |
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} |
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// compiler-generated copy ctor is fine |
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// assignment is disallowed because there is a reference member |
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result_type operator()(argument_type n) |
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{ |
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typedef uniform_int<IntType> dist_type; |
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return variate_generator<base_type&, dist_type>(_rng, dist_type(0, n-1))(); |
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} |
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private: |
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base_type& _rng; |
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}; |
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} // namespace boost |
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#endif // BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP |