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Diffstat (limited to '3rdParty/Boost/src/boost/random')
| -rw-r--r-- | 3rdParty/Boost/src/boost/random/uniform_real.hpp | 108 | 
1 files changed, 108 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/random/uniform_real.hpp b/3rdParty/Boost/src/boost/random/uniform_real.hpp new file mode 100644 index 0000000..06bfbc3 --- /dev/null +++ b/3rdParty/Boost/src/boost/random/uniform_real.hpp @@ -0,0 +1,108 @@ +/* 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 60755 2010-03-22 00:45:06Z 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 { + +/** + * The distribution function uniform_real models a random distribution. + * On each invocation, it returns a random floating-point value uniformly + * distributed in the range [min..max). The value is computed using + * std::numeric_limits<RealType>::digits random binary digits, i.e. + * the mantissa of the floating-point value is completely filled with + * random bits. + * + * Note: The current implementation is buggy, because it may not fill + * all of the mantissa with random bits. + */ +template<class RealType = double> +class uniform_real +{ +public: +  typedef RealType input_type; +  typedef RealType result_type; + +  /** +   * Constructs a uniform_real object. @c min and @c max are the +   * parameters of the distribution. +   * +   * Requires: min <= max +   */ +  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 + +  /** +   * Returns: The "min" parameter of the distribution +   */ +  result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _min; } +  /** +   * Returns: The "max" parameter of the distribution +   */ +  result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return _max; } +  void reset() { } + +  template<class Engine> +  result_type operator()(Engine& eng) { +    result_type numerator = static_cast<result_type>(eng() - eng.min BOOST_PREVENT_MACRO_SUBSTITUTION()); +    result_type divisor = static_cast<result_type>(eng.max BOOST_PREVENT_MACRO_SUBSTITUTION() - eng.min BOOST_PREVENT_MACRO_SUBSTITUTION()); +    assert(divisor > 0); +    assert(numerator >= 0 && numerator <= divisor); +    return numerator / divisor * (_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  | 
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