mirror of
https://gitlab.isc.org/isc-projects/kea
synced 2025-09-05 16:35:23 +00:00
537ddbf8cd
git-svn-id: svn://bind10.isc.org/svn/bind10/branches/f2f200910@210 e5f2f494-b856-4b98-b285-d166d9295462
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/* boost nondet_random.hpp header file
|
|
*
|
|
* Copyright Jens Maurer 2000
|
|
* 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)
|
|
*
|
|
* $Id: nondet_random.hpp 49314 2008-10-13 09:00:03Z johnmaddock $
|
|
*
|
|
* Revision history
|
|
* 2000-02-18 Portability fixes (thanks to Beman Dawes)
|
|
*/
|
|
|
|
// See http://www.boost.org/libs/random for documentation.
|
|
|
|
|
|
#ifndef BOOST_NONDET_RANDOM_HPP
|
|
#define BOOST_NONDET_RANDOM_HPP
|
|
|
|
#include <string> // std::abs
|
|
#include <algorithm> // std::min
|
|
#include <boost/config/no_tr1/cmath.hpp>
|
|
#include <boost/config.hpp>
|
|
#include <boost/utility.hpp> // noncopyable
|
|
#include <boost/integer_traits.hpp> // compile-time integral limits
|
|
|
|
namespace boost {
|
|
|
|
// use some OS service to generate non-deterministic random numbers
|
|
class random_device : private noncopyable
|
|
{
|
|
public:
|
|
typedef unsigned int result_type;
|
|
BOOST_STATIC_CONSTANT(bool, has_fixed_range = true);
|
|
BOOST_STATIC_CONSTANT(result_type, min_value = integer_traits<result_type>::const_min);
|
|
BOOST_STATIC_CONSTANT(result_type, max_value = integer_traits<result_type>::const_max);
|
|
|
|
result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return min_value; }
|
|
result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return max_value; }
|
|
explicit random_device(const std::string& token = default_token);
|
|
~random_device();
|
|
double entropy() const;
|
|
unsigned int operator()();
|
|
|
|
private:
|
|
static const char * const default_token;
|
|
|
|
/*
|
|
* std:5.3.5/5 [expr.delete]: "If the object being deleted has incomplete
|
|
* class type at the point of deletion and the complete class has a
|
|
* non-trivial destructor [...], the behavior is undefined".
|
|
* This disallows the use of scoped_ptr<> with pimpl-like classes
|
|
* having a non-trivial destructor.
|
|
*/
|
|
class impl;
|
|
impl * pimpl;
|
|
};
|
|
|
|
|
|
// TODO: put Schneier's Yarrow-160 algorithm here.
|
|
|
|
} // namespace boost
|
|
|
|
#endif /* BOOST_NONDET_RANDOM_HPP */
|