/* 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,v 1.3 2004/07/27 03:43:32 dgregor Exp $

 *

 */

#ifndef BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP

#define BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP

#include <boost/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 = 0, IntType max = 0xffffffff)

    : _rng(rng), _min(min), _max(max)

  {

    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;

  }

#if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)

  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