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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 
     1 /* boost random/detail/uniform_int_float.hpp header file

     2  *

     3  * Copyright Jens Maurer 2000-2001

     4  * Distributed under the Boost Software License, Version 1.0. (See

     5  * accompanying file LICENSE_1_0.txt or copy at

     6  * http://www.boost.org/LICENSE_1_0.txt)

     7  *

     8  * See http://www.boost.org for most recent version including documentation.

     9  *

    10  * $Id: uniform_int_float.hpp,v 1.3 2004/07/27 03:43:32 dgregor Exp $

    11  *

    12  */

    13 

    14 #ifndef BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP

    15 #define BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP

    16 

    17 #include <boost/config.hpp>

    18 #include <boost/random/uniform_01.hpp>

    19 

    20 

    21 namespace boost {

    22 namespace random {

    23 namespace detail {

    24 

    25 template<class UniformRandomNumberGenerator, class IntType = unsigned long>

    26 class uniform_int_float

    27 {

    28 public:

    29   typedef UniformRandomNumberGenerator base_type;

    30   typedef IntType result_type;

    31 

    32   uniform_int_float(base_type rng, IntType min = 0, IntType max = 0xffffffff)

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

    34   {

    35     init();

    36   }

    37 

    38   result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _min; }

    39   result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _max; }

    40   base_type& base() { return _rng.base(); }

    41   const base_type& base() const { return _rng.base(); }

    42 

    43   result_type operator()()

    44   {

    45     return static_cast<IntType>(_rng() * _range) + _min;

    46   }

    47 

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

    49   template<class CharT, class Traits>

    50   friend std::basic_ostream<CharT,Traits>&

    51   operator<<(std::basic_ostream<CharT,Traits>& os, const uniform_int_float& ud)

    52   {

    53     os << ud._min << " " << ud._max;

    54     return os;

    55   }

    56 

    57   template<class CharT, class Traits>

    58   friend std::basic_istream<CharT,Traits>&

    59   operator>>(std::basic_istream<CharT,Traits>& is, uniform_int_float& ud)

    60   {

    61     is >> std::ws >> ud._min >> std::ws >> ud._max;

    62     ud.init();

    63     return is;

    64   }

    65 #endif

    66 

    67 private:

    68   void init()

    69   {

    70     _range = static_cast<base_result>(_max-_min)+1;

    71   }

    72 

    73   typedef typename base_type::result_type base_result;

    74   uniform_01<base_type> _rng;

    75   result_type _min, _max;

    76   base_result _range;

    77 };

    78 

    79 

    80 } // namespace detail

    81 } // namespace random

    82 } // namespace boost

    83 

    84 #endif // BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
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