diff -r 000000000000 -r e4d67989cc36 ossrv_pub/boost_apis/boost/random/uniform_01.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ossrv_pub/boost_apis/boost/random/uniform_01.hpp Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,93 @@ +/* boost random/uniform_01.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_01.hpp,v 1.18 2004/07/27 03:43:32 dgregor Exp $ + * + * Revision history + * 2001-02-18 moved to individual header files + */ + +#ifndef BOOST_RANDOM_UNIFORM_01_HPP +#define BOOST_RANDOM_UNIFORM_01_HPP + +#include +#include +#include +#include + +namespace boost { + +// Because it is so commonly used: uniform distribution on the real [0..1) +// range. This allows for specializations to avoid a costly int -> float +// conversion plus float multiplication +template +class uniform_01 +{ +public: + typedef UniformRandomNumberGenerator base_type; + typedef RealType result_type; + + BOOST_STATIC_CONSTANT(bool, has_fixed_range = false); + +#if !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) && !(defined(BOOST_MSVC) && BOOST_MSVC <= 1300) + BOOST_STATIC_ASSERT(!std::numeric_limits::is_integer); +#endif + + explicit uniform_01(base_type rng) + : _rng(rng), + _factor(result_type(1) / + (result_type((_rng.max)()-(_rng.min)()) + + result_type(std::numeric_limits::is_integer ? 1 : 0))) + { + } + // compiler-generated copy ctor and copy assignment are fine + + result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return result_type(0); } + result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return result_type(1); } + base_type& base() { return _rng; } + const base_type& base() const { return _rng; } + void reset() { } + + result_type operator()() { + return result_type(_rng() - (_rng.min)()) * _factor; + } + +#if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) + template + friend std::basic_ostream& + operator<<(std::basic_ostream& os, const uniform_01& u) + { + os << u._rng; + return os; + } + + template + friend std::basic_istream& + operator>>(std::basic_istream& is, uniform_01& u) + { + is >> u._rng; + return is; + } +#endif + +private: + typedef typename base_type::result_type base_result; + base_type _rng; + result_type _factor; +}; + +#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION +// A definition is required even for integral static constants +template +const bool uniform_01::has_fixed_range; +#endif + +} // namespace boost + +#endif // BOOST_RANDOM_UNIFORM_01_HPP