williamr@2: /* boost random/uniform_real.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_real.hpp,v 1.17 2005/01/28 15:04:17 dgregor Exp $ williamr@2: * williamr@2: * Revision history williamr@2: * 2001-04-08 added min williamr@2: #include williamr@2: #include williamr@2: #include williamr@2: #include williamr@2: williamr@2: namespace boost { williamr@2: williamr@2: // uniform distribution on a real range williamr@2: template williamr@2: class uniform_real williamr@2: { williamr@2: public: williamr@2: typedef RealType input_type; williamr@2: typedef RealType result_type; williamr@2: williamr@2: explicit uniform_real(RealType min = RealType(0), williamr@2: RealType max = RealType(1)) williamr@2: : _min(min), _max(max) williamr@2: { williamr@2: #ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS williamr@2: BOOST_STATIC_ASSERT(!std::numeric_limits::is_integer); williamr@2: #endif williamr@2: assert(min < max); williamr@2: } williamr@2: williamr@2: // compiler-generated copy ctor and assignment operator are fine 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: void reset() { } williamr@2: williamr@2: template williamr@2: result_type operator()(Engine& eng) { williamr@2: return static_cast(eng() - eng.min BOOST_PREVENT_MACRO_SUBSTITUTION()) williamr@2: / static_cast(eng.max BOOST_PREVENT_MACRO_SUBSTITUTION() - eng.min BOOST_PREVENT_MACRO_SUBSTITUTION()) williamr@2: * (_max - _min) + _min; williamr@2: } williamr@2: williamr@2: #if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) williamr@2: template williamr@2: friend std::basic_ostream& williamr@2: operator<<(std::basic_ostream& os, const uniform_real& ud) williamr@2: { williamr@2: os << ud._min << " " << ud._max; williamr@2: return os; williamr@2: } williamr@2: williamr@2: template williamr@2: friend std::basic_istream& williamr@2: operator>>(std::basic_istream& is, uniform_real& ud) williamr@2: { williamr@2: is >> std::ws >> ud._min >> std::ws >> ud._max; williamr@2: return is; williamr@2: } williamr@2: #endif williamr@2: williamr@2: private: williamr@2: RealType _min, _max; williamr@2: }; williamr@2: williamr@2: } // namespace boost williamr@2: williamr@2: #endif // BOOST_RANDOM_UNIFORM_REAL_HPP