| /* boost random/uniform_real.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_real.hpp 52492 2009-04-19 14:55:57Z steven_watanabe $ |
| * |
| * Revision history |
| * 2001-04-08 added min<max assertion (N. Becker) |
| * 2001-02-18 moved to individual header files |
| */ |
| |
| #ifndef BOOST_RANDOM_UNIFORM_REAL_HPP |
| #define BOOST_RANDOM_UNIFORM_REAL_HPP |
| |
| #include <cassert> |
| #include <iostream> |
| #include <boost/config.hpp> |
| #include <boost/limits.hpp> |
| #include <boost/static_assert.hpp> |
| #include <boost/random/detail/config.hpp> |
| |
| namespace boost { |
| |
| // uniform distribution on a real range |
| template<class RealType = double> |
| class uniform_real |
| { |
| public: |
| typedef RealType input_type; |
| typedef RealType result_type; |
| |
| explicit uniform_real(RealType min_arg = RealType(0), |
| RealType max_arg = RealType(1)) |
| : _min(min_arg), _max(max_arg) |
| { |
| #ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS |
| BOOST_STATIC_ASSERT(!std::numeric_limits<RealType>::is_integer); |
| #endif |
| assert(min_arg <= max_arg); |
| } |
| |
| // compiler-generated copy ctor and assignment operator are fine |
| |
| result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _min; } |
| result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _max; } |
| void reset() { } |
| |
| template<class Engine> |
| result_type operator()(Engine& eng) { |
| return static_cast<result_type>(eng() - eng.min BOOST_PREVENT_MACRO_SUBSTITUTION()) |
| / static_cast<result_type>(eng.max BOOST_PREVENT_MACRO_SUBSTITUTION() - eng.min BOOST_PREVENT_MACRO_SUBSTITUTION()) |
| * (_max - _min) + _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_real& 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_real& ud) |
| { |
| is >> std::ws >> ud._min >> std::ws >> ud._max; |
| return is; |
| } |
| #endif |
| |
| private: |
| RealType _min, _max; |
| }; |
| |
| } // namespace boost |
| |
| #endif // BOOST_RANDOM_UNIFORM_REAL_HPP |