williamr@2: /* boost random/detail/uniform_int_float.hpp header file
williamr@2:  *
williamr@2:  * Copyright Jens Maurer 2000-2001
williamr@2:  * Distributed under the Boost Software License, Version 1.0. (See
williamr@2:  * accompanying file LICENSE_1_0.txt or copy at
williamr@2:  * http://www.boost.org/LICENSE_1_0.txt)
williamr@2:  *
williamr@2:  * See http://www.boost.org for most recent version including documentation.
williamr@2:  *
williamr@2:  * $Id: uniform_int_float.hpp,v 1.3 2004/07/27 03:43:32 dgregor Exp $
williamr@2:  *
williamr@2:  */
williamr@2: 
williamr@2: #ifndef BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
williamr@2: #define BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
williamr@2: 
williamr@2: #include <boost/config.hpp>
williamr@2: #include <boost/random/uniform_01.hpp>
williamr@2: 
williamr@2: 
williamr@2: namespace boost {
williamr@2: namespace random {
williamr@2: namespace detail {
williamr@2: 
williamr@2: template<class UniformRandomNumberGenerator, class IntType = unsigned long>
williamr@2: class uniform_int_float
williamr@2: {
williamr@2: public:
williamr@2:   typedef UniformRandomNumberGenerator base_type;
williamr@2:   typedef IntType result_type;
williamr@2: 
williamr@2:   uniform_int_float(base_type rng, IntType min = 0, IntType max = 0xffffffff)
williamr@2:     : _rng(rng), _min(min), _max(max)
williamr@2:   {
williamr@2:     init();
williamr@2:   }
williamr@2: 
williamr@2:   result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _min; }
williamr@2:   result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _max; }
williamr@2:   base_type& base() { return _rng.base(); }
williamr@2:   const base_type& base() const { return _rng.base(); }
williamr@2: 
williamr@2:   result_type operator()()
williamr@2:   {
williamr@2:     return static_cast<IntType>(_rng() * _range) + _min;
williamr@2:   }
williamr@2: 
williamr@2: #if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
williamr@2:   template<class CharT, class Traits>
williamr@2:   friend std::basic_ostream<CharT,Traits>&
williamr@2:   operator<<(std::basic_ostream<CharT,Traits>& os, const uniform_int_float& ud)
williamr@2:   {
williamr@2:     os << ud._min << " " << ud._max;
williamr@2:     return os;
williamr@2:   }
williamr@2: 
williamr@2:   template<class CharT, class Traits>
williamr@2:   friend std::basic_istream<CharT,Traits>&
williamr@2:   operator>>(std::basic_istream<CharT,Traits>& is, uniform_int_float& ud)
williamr@2:   {
williamr@2:     is >> std::ws >> ud._min >> std::ws >> ud._max;
williamr@2:     ud.init();
williamr@2:     return is;
williamr@2:   }
williamr@2: #endif
williamr@2: 
williamr@2: private:
williamr@2:   void init()
williamr@2:   {
williamr@2:     _range = static_cast<base_result>(_max-_min)+1;
williamr@2:   }
williamr@2: 
williamr@2:   typedef typename base_type::result_type base_result;
williamr@2:   uniform_01<base_type> _rng;
williamr@2:   result_type _min, _max;
williamr@2:   base_result _range;
williamr@2: };
williamr@2: 
williamr@2: 
williamr@2: } // namespace detail
williamr@2: } // namespace random
williamr@2: } // namespace boost
williamr@2: 
williamr@2: #endif // BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP