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/* boost random/detail/uniform_int_float.hpp header file
*
* Copyright Jens Maurer 2000-2001
* Distributed under the Boost Software License, Version 1.0. (See
* accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
* See http://www.boost.org for most recent version including documentation.
*
* $Id: uniform_int_float.hpp 52492 2009-04-19 14:55:57Z steven_watanabe $
*
*/
#ifndef BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
#define BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
#include <boost/config.hpp>
#include <boost/random/detail/config.hpp>
#include <boost/random/uniform_01.hpp>
namespace boost {
namespace random {
namespace detail {
template<class UniformRandomNumberGenerator, class IntType = unsigned long>
class uniform_int_float
{
public:
typedef UniformRandomNumberGenerator base_type;
typedef IntType result_type;
uniform_int_float(base_type rng, IntType min_arg = 0, IntType max_arg = 0xffffffff)
: _rng(rng), _min(min_arg), _max(max_arg)
{
init();
}
result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _min; }
result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _max; }
base_type& base() { return _rng.base(); }
const base_type& base() const { return _rng.base(); }
result_type operator()()
{
return static_cast<IntType>(_rng() * _range) + _min;
}
#ifndef BOOST_RANDOM_NO_STREAM_OPERATORS
template<class CharT, class Traits>
friend std::basic_ostream<CharT,Traits>&
operator<<(std::basic_ostream<CharT,Traits>& os, const uniform_int_float& ud)
{
os << ud._min << " " << ud._max;
return os;
}
template<class CharT, class Traits>
friend std::basic_istream<CharT,Traits>&
operator>>(std::basic_istream<CharT,Traits>& is, uniform_int_float& ud)
{
is >> std::ws >> ud._min >> std::ws >> ud._max;
ud.init();
return is;
}
#endif
private:
void init()
{
_range = static_cast<base_result>(_max-_min)+1;
}
typedef typename base_type::result_type base_result;
uniform_01<base_type> _rng;
result_type _min, _max;
base_result _range;
};
} // namespace detail
} // namespace random
} // namespace boost
#endif // BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
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