epoc32/include/stdapis/boost/random/detail/uniform_int_float.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:27:01 +0100
branchSymbian2
changeset 3 e1b950c65cb4
permissions -rw-r--r--
Attempt to represent the S^2->S^3 header reorganisation as a series of "hg rename" operations
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/* boost random/detail/uniform_int_float.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: uniform_int_float.hpp,v 1.3 2004/07/27 03:43:32 dgregor Exp $
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 *
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 */
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#ifndef BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
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#define BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
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#include <boost/config.hpp>
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#include <boost/random/uniform_01.hpp>
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namespace boost {
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namespace random {
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namespace detail {
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template<class UniformRandomNumberGenerator, class IntType = unsigned long>
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class uniform_int_float
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{
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public:
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  typedef UniformRandomNumberGenerator base_type;
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  typedef IntType result_type;
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  uniform_int_float(base_type rng, IntType min = 0, IntType max = 0xffffffff)
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    : _rng(rng), _min(min), _max(max)
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  {
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    init();
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  }
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  result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _min; }
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  result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _max; }
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  base_type& base() { return _rng.base(); }
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  const base_type& base() const { return _rng.base(); }
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  result_type operator()()
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  {
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    return static_cast<IntType>(_rng() * _range) + _min;
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  }
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#if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
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  template<class CharT, class Traits>
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  friend std::basic_ostream<CharT,Traits>&
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  operator<<(std::basic_ostream<CharT,Traits>& os, const uniform_int_float& ud)
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  {
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    os << ud._min << " " << ud._max;
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    return os;
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  }
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  template<class CharT, class Traits>
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  friend std::basic_istream<CharT,Traits>&
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  operator>>(std::basic_istream<CharT,Traits>& is, uniform_int_float& ud)
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  {
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    is >> std::ws >> ud._min >> std::ws >> ud._max;
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    ud.init();
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    return is;
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  }
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#endif
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private:
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  void init()
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  {
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    _range = static_cast<base_result>(_max-_min)+1;
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  }
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  typedef typename base_type::result_type base_result;
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  uniform_01<base_type> _rng;
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  result_type _min, _max;
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  base_result _range;
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};
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} // namespace detail
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} // namespace random
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} // namespace boost
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#endif // BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP