diff options
Diffstat (limited to '3rdParty/Boost/src/boost/random/detail/uniform_int_float.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/random/detail/uniform_int_float.hpp | 83 |
1 files changed, 37 insertions, 46 deletions
diff --git a/3rdParty/Boost/src/boost/random/detail/uniform_int_float.hpp b/3rdParty/Boost/src/boost/random/detail/uniform_int_float.hpp index 4607021..ef20915 100644 --- a/3rdParty/Boost/src/boost/random/detail/uniform_int_float.hpp +++ b/3rdParty/Boost/src/boost/random/detail/uniform_int_float.hpp @@ -1,85 +1,76 @@ /* boost random/detail/uniform_int_float.hpp header file * * Copyright Jens Maurer 2000-2001 + * Copyright Steven Watanabe 2011 * 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 52492 2009-04-19 14:55:57Z steven_watanabe $ + * $Id: uniform_int_float.hpp 72951 2011-07-07 04:57:37Z steven_watanabe $ * */ #ifndef BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP #define BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP +#include <boost/limits.hpp> #include <boost/config.hpp> +#include <boost/integer.hpp> #include <boost/random/detail/config.hpp> -#include <boost/random/uniform_01.hpp> +#include <boost/random/detail/generator_bits.hpp> +#include <boost/random/detail/disable_warnings.hpp> namespace boost { namespace random { namespace detail { -template<class UniformRandomNumberGenerator, class IntType = unsigned long> +template<class URNG> class uniform_int_float { public: - typedef UniformRandomNumberGenerator base_type; - typedef IntType result_type; + typedef URNG base_type; + typedef typename base_type::result_type base_result; - uniform_int_float(base_type rng, IntType min_arg = 0, IntType max_arg = 0xffffffff) - : _rng(rng), _min(min_arg), _max(max_arg) - { - init(); - } + typedef typename boost::uint_t< + (std::numeric_limits<boost::uintmax_t>::digits < + std::numeric_limits<base_result>::digits)? + std::numeric_limits<boost::uintmax_t>::digits : + std::numeric_limits<base_result>::digits + >::fast result_type; - 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(); } + uniform_int_float(base_type& rng) + : _rng(rng) {} - result_type operator()() - { - return static_cast<IntType>(_rng() * _range) + _min; - } + static result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () + { return 0; } + static result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () + { + std::size_t digits = std::numeric_limits<result_type>::digits; + if(detail::generator_bits<URNG>::value() < digits) { + digits = detail::generator_bits<URNG>::value(); + } + return (result_type(2) << (digits - 1)) - 1; + } + base_type& base() { return _rng; } + const base_type& base() const { return _rng; } -#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_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 + result_type operator()() + { + base_result range = static_cast<base_result>((max)())+1; + return static_cast<result_type>(_rng() * range); + } 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; + base_type& _rng; }; - } // namespace detail } // namespace random } // namespace boost +#include <boost/random/detail/enable_warnings.hpp> + #endif // BOOST_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP |