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587 lines
18 KiB
C++
587 lines
18 KiB
C++
// (C) Copyright John Maddock 2005.
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// (C) Copyright Henry S. Warren 2005.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_TR1_RANDOM_HPP_INCLUDED
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# define BOOST_TR1_RANDOM_HPP_INCLUDED
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# include <boost/tr1/detail/config.hpp>
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#ifdef BOOST_HAS_TR1_RANDOM
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# if defined(BOOST_HAS_INCLUDE_NEXT) && !defined(BOOST_TR1_DISABLE_INCLUDE_NEXT)
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# include_next BOOST_TR1_HEADER(random)
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# else
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# include <boost/tr1/detail/config_all.hpp>
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# include BOOST_TR1_STD_HEADER(BOOST_TR1_PATH(random))
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# endif
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#else
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// Boost.Random:
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#include <boost/random.hpp>
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#ifndef __SUNPRO_CC
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// Sunpros linker complains if we so much as include this...
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# include <boost/nondet_random.hpp>
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#endif
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#include <boost/tr1/detail/functor2iterator.hpp>
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#include <boost/type_traits/is_fundamental.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace std { namespace tr1{
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using ::boost::variate_generator;
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template<class UIntType, UIntType a, UIntType c, UIntType m>
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class linear_congruential
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{
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private:
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typedef ::boost::random::linear_congruential<UIntType, a, c, m, 0> impl_type;
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public:
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// types
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typedef UIntType result_type;
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// parameter values
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BOOST_STATIC_CONSTANT(UIntType, multiplier = a);
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BOOST_STATIC_CONSTANT(UIntType, increment = c);
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BOOST_STATIC_CONSTANT(UIntType, modulus = m);
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// constructors and member function
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explicit linear_congruential(unsigned long x0 = 1)
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: m_gen(x0){}
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linear_congruential(const linear_congruential& that)
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: m_gen(that.m_gen){}
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template<class Gen> linear_congruential(Gen& g)
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{
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init1(g, ::boost::is_same<Gen,linear_congruential>());
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}
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void seed(unsigned long x0 = 1)
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{ m_gen.seed(x0); }
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template<class Gen> void seed(Gen& g)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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result_type min BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.min)(); }
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result_type max BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.max)(); }
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result_type operator()()
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{
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return m_gen();
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}
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bool operator==(const linear_congruential& that)const
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{ return m_gen == that.m_gen; }
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bool operator!=(const linear_congruential& that)const
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{ return m_gen != that.m_gen; }
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#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<class CharT, class Traits>
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friend std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits>& os,
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const linear_congruential& lcg)
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{
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return os << lcg.m_gen;
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}
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template<class CharT, class Traits>
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friend std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits>& is,
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linear_congruential& lcg)
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{
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return is >> lcg.m_gen;
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}
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#endif
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private:
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template <class Gen>
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void init1(Gen& g, const ::boost::true_type&)
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{
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m_gen = g.m_gen;
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}
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template <class Gen>
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void init1(Gen& g, const ::boost::false_type&)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::true_type&)
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{
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m_gen.seed(static_cast<unsigned long>(g));
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::false_type&)
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{
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//typedef typename Gen::result_type gen_rt;
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boost::tr1_details::functor2iterator<Gen, unsigned long> f1(g), f2;
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m_gen.seed(f1, f2);
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}
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impl_type m_gen;
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};
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template<class UIntType, int w, int n, int m, int r,
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UIntType a, int u, int s, UIntType b, int t, UIntType c, int l>
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class mersenne_twister
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{
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typedef ::boost::random::mersenne_twister
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<UIntType, w, n, m, r, a, u, s, b, t, c, l, 0> imp_type;
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public:
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// types
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typedef UIntType result_type;
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// parameter values
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BOOST_STATIC_CONSTANT(int, word_size = w);
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BOOST_STATIC_CONSTANT(int, state_size = n);
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BOOST_STATIC_CONSTANT(int, shift_size = m);
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BOOST_STATIC_CONSTANT(int, mask_bits = r);
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BOOST_STATIC_CONSTANT(UIntType, parameter_a = a);
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BOOST_STATIC_CONSTANT(int, output_u = u);
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BOOST_STATIC_CONSTANT(int, output_s = s);
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BOOST_STATIC_CONSTANT(UIntType, output_b = b);
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BOOST_STATIC_CONSTANT(int, output_t = t);
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BOOST_STATIC_CONSTANT(UIntType, output_c = c);
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BOOST_STATIC_CONSTANT(int, output_l = l);
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// constructors and member function
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mersenne_twister(){}
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explicit mersenne_twister(unsigned long value)
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: m_gen(value == 0 ? 5489UL : value){}
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template<class Gen> mersenne_twister(Gen& g)
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{
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init1(g, ::boost::is_same<mersenne_twister,Gen>());
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}
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void seed()
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{ m_gen.seed(); }
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void seed(unsigned long value)
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{ m_gen.seed(value == 0 ? 5489UL : value); }
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template<class Gen> void seed(Gen& g)
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{ init2(g, ::boost::is_fundamental<Gen>()); }
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result_type min BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.min)(); }
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result_type max BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.max)(); }
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result_type operator()()
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{ return m_gen(); }
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bool operator==(const mersenne_twister& that)const
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{ return m_gen == that.m_gen; }
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bool operator!=(const mersenne_twister& that)const
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{ return m_gen != that.m_gen; }
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#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<class CharT, class Traits>
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friend std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits>& os,
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const mersenne_twister& lcg)
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{
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return os << lcg.m_gen;
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}
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template<class CharT, class Traits>
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friend std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits>& is,
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mersenne_twister& lcg)
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{
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return is >> lcg.m_gen;
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}
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#endif
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private:
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template <class Gen>
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void init1(Gen& g, const ::boost::true_type&)
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{
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m_gen = g.m_gen;
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}
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template <class Gen>
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void init1(Gen& g, const ::boost::false_type&)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::true_type&)
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{
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m_gen.seed(static_cast<unsigned long>(g == 0 ? 4357UL : g));
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::false_type&)
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{
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m_gen.seed(g);
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}
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imp_type m_gen;
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};
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template<class IntType, IntType m, int s, int r>
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class subtract_with_carry
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{
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public:
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// types
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typedef IntType result_type;
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// parameter values
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BOOST_STATIC_CONSTANT(IntType, modulus = m);
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BOOST_STATIC_CONSTANT(int, long_lag = r);
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BOOST_STATIC_CONSTANT(int, short_lag = s);
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// constructors and member function
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subtract_with_carry(){}
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explicit subtract_with_carry(unsigned long value)
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: m_gen(value == 0 ? 19780503UL : value){}
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template<class Gen> subtract_with_carry(Gen& g)
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{ init1(g, ::boost::is_same<Gen, subtract_with_carry<IntType, m, s, r> >()); }
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void seed(unsigned long value = 19780503ul)
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{ m_gen.seed(value == 0 ? 19780503UL : value); }
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template<class Gen> void seed(Gen& g)
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{ init2(g, ::boost::is_fundamental<Gen>()); }
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result_type min BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.min)(); }
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result_type max BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.max)(); }
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result_type operator()()
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{ return m_gen(); }
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bool operator==(const subtract_with_carry& that)const
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{ return m_gen == that.m_gen; }
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bool operator!=(const subtract_with_carry& that)const
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{ return m_gen != that.m_gen; }
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#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<class CharT, class Traits>
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friend std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits>& os,
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const subtract_with_carry& lcg)
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{
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return os << lcg.m_gen;
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}
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template<class CharT, class Traits>
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friend std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits>& is,
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subtract_with_carry& lcg)
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{
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return is >> lcg.m_gen;
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}
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#endif
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private:
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template <class Gen>
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void init1(Gen& g, const ::boost::true_type&)
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{
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m_gen = g.m_gen;
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}
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template <class Gen>
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void init1(Gen& g, const ::boost::false_type&)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::true_type&)
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{
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m_gen.seed(static_cast<unsigned long>(g == 0 ? 19780503UL : g));
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::false_type&)
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{
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m_gen.seed(g);
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}
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::boost::random::subtract_with_carry<IntType, m, s, r, 0> m_gen;
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};
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template<class RealType, int w, int s, int r>
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class subtract_with_carry_01
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{
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public:
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// types
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typedef RealType result_type;
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// parameter values
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BOOST_STATIC_CONSTANT(int, word_size = w);
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BOOST_STATIC_CONSTANT(int, long_lag = r);
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BOOST_STATIC_CONSTANT(int, short_lag = s);
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// constructors and member function
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subtract_with_carry_01(){}
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explicit subtract_with_carry_01(unsigned long value)
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: m_gen(value == 0 ? 19780503UL : value){}
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template<class Gen> subtract_with_carry_01(Gen& g)
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{ init1(g, ::boost::is_same<Gen, subtract_with_carry_01<RealType, w, s, r> >()); }
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void seed(unsigned long value = 19780503UL)
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{ m_gen.seed(value == 0 ? 19780503UL : value); }
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template<class Gen> void seed(Gen& g)
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{ init2(g, ::boost::is_fundamental<Gen>()); }
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result_type min BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.min)(); }
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result_type max BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return (m_gen.max)(); }
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result_type operator()()
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{ return m_gen(); }
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bool operator==(const subtract_with_carry_01& that)const
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{ return m_gen == that.m_gen; }
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bool operator!=(const subtract_with_carry_01& that)const
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{ return m_gen != that.m_gen; }
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#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<class CharT, class Traits>
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friend std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits>& os,
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const subtract_with_carry_01& lcg)
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{
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return os << lcg.m_gen;
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}
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template<class CharT, class Traits>
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friend std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits>& is,
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subtract_with_carry_01& lcg)
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{
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return is >> lcg.m_gen;
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}
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#endif
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private:
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template <class Gen>
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void init1(Gen& g, const ::boost::true_type&)
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{
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m_gen = g.m_gen;
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}
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template <class Gen>
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void init1(Gen& g, const ::boost::false_type&)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::true_type&)
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{
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m_gen.seed(static_cast<unsigned long>(g == 0 ? 19780503UL : g));
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::false_type&)
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{
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//typedef typename Gen::result_type gen_rt;
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boost::tr1_details::functor2iterator<Gen, unsigned long> f1(g), f2;
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m_gen.seed(f1, f2);
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}
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::boost::random::subtract_with_carry_01<RealType, w, s, r, 0> m_gen;
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};
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using ::boost::random::discard_block;
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template<class UniformRandomNumberGenerator1, int s1, class UniformRandomNumberGenerator2, int s2>
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class xor_combine
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{
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public:
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// types
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typedef UniformRandomNumberGenerator1 base1_type;
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typedef UniformRandomNumberGenerator2 base2_type;
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typedef unsigned long result_type;
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// parameter values
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BOOST_STATIC_CONSTANT(int, shift1 = s1);
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BOOST_STATIC_CONSTANT(int, shift2 = s2);
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// constructors and member function
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xor_combine(){ init_minmax(); }
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xor_combine(const base1_type & rng1, const base2_type & rng2)
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: m_b1(rng1), m_b2(rng2) { init_minmax(); }
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xor_combine(unsigned long s)
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: m_b1(s), m_b2(s+1) { init_minmax(); }
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template<class Gen> xor_combine(Gen& g)
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{
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init_minmax();
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init1(g, ::boost::is_same<Gen, xor_combine<UniformRandomNumberGenerator1, s1, UniformRandomNumberGenerator2, s2> >());
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}
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void seed()
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{
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m_b1.seed();
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m_b2.seed();
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}
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void seed(unsigned long s)
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{
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m_b1.seed(s);
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m_b2.seed(s+1);
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}
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template<class Gen> void seed(Gen& g)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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const base1_type& base1() const
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{ return m_b1; }
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const base2_type& base2() const
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{ return m_b2; }
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result_type min BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return m_min; }
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result_type max BOOST_PREVENT_MACRO_SUBSTITUTION() const
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{ return m_max; }
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result_type operator()()
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{ return (m_b1() << s1) ^ (m_b2() << s2); }
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bool operator == (const xor_combine& that)const
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{ return (m_b1 == that.m_b1) && (m_b2 == that.m_b2); }
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bool operator != (const xor_combine& that)const
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{ return !(*this == that); }
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#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<class CharT, class Traits>
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friend std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits>& os,
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const xor_combine& lcg)
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{
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return os << lcg.m_b1 << " " << lcg.m_b2;
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}
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template<class CharT, class Traits>
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friend std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits>& is,
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xor_combine& lcg)
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{
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return is >> lcg.m_b1 >> lcg.m_b2;
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}
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#endif
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private:
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void init_minmax();
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base1_type m_b1;
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base2_type m_b2;
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result_type m_min;
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result_type m_max;
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template <class Gen>
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void init1(Gen& g, const ::boost::true_type&)
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{
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m_b1 = g.m_b1;
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m_b2 = g.m_b2;
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}
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template <class Gen>
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void init1(Gen& g, const ::boost::false_type&)
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{
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init2(g, ::boost::is_fundamental<Gen>());
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::true_type&)
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{
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m_b1.seed(static_cast<unsigned long>(g));
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m_b2.seed(static_cast<unsigned long>(g));
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}
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template <class Gen>
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void init2(Gen& g, const ::boost::false_type&)
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{
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m_b1.seed(g);
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m_b2.seed(g);
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}
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};
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template<class UniformRandomNumberGenerator1, int s1, class UniformRandomNumberGenerator2, int s2>
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void xor_combine<UniformRandomNumberGenerator1, s1, UniformRandomNumberGenerator2, s2>::init_minmax()
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{
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//
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// The following code is based on that given in "Hacker's Delight"
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// by Henry S. Warren, (Addison-Wesley, 2003), and at
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// http://www.hackersdelight.org/index.htm.
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// Used here by permission.
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//
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// calculation of minimum value:
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//
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result_type a = (m_b1.min)() << s1;
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result_type b = (m_b1.max)() << s1;
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result_type c = (m_b2.min)() << s2;
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result_type d = (m_b2.max)() << s2;
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result_type m, temp;
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m = 0x1uL << ((sizeof(result_type) * CHAR_BIT) - 1);
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while (m != 0) {
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if (~a & c & m) {
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temp = (a | m) & (static_cast<result_type>(0u) - m);
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if (temp <= b) a = temp;
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}
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else if (a & ~c & m) {
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temp = (c | m) & (static_cast<result_type>(0u) - m);
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if (temp <= d) c = temp;
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}
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m >>= 1;
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}
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m_min = a ^ c;
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//
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// calculation of maximum value:
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//
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if((((std::numeric_limits<result_type>::max)() >> s1) < (m_b1.max)())
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|| ((((std::numeric_limits<result_type>::max)()) >> s2) < (m_b2.max)()))
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{
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m_max = (std::numeric_limits<result_type>::max)();
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return;
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}
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a = (m_b1.min)() << s1;
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b = (m_b1.max)() << s1;
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c = (m_b2.min)() << s2;
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d = (m_b2.max)() << s2;
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m = 0x1uL << ((sizeof(result_type) * CHAR_BIT) - 1);
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while (m != 0) {
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if (b & d & m) {
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temp = (b - m) | (m - 1);
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if (temp >= a) b = temp;
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else {
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temp = (d - m) | (m - 1);
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if (temp >= c) d = temp;
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}
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}
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m = m >> 1;
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}
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m_max = b ^ d;
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}
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typedef linear_congruential< ::boost::int32_t, 16807, 0, 2147483647> minstd_rand0;
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typedef linear_congruential< ::boost::int32_t, 48271, 0, 2147483647> minstd_rand;
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typedef mersenne_twister< ::boost::uint32_t, 32,624,397,31,0x9908b0df,11,7,0x9d2c5680,15,0xefc60000,18> mt19937;
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typedef subtract_with_carry_01<float, 24, 10, 24> ranlux_base_01;
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typedef subtract_with_carry_01<double, 48, 10, 24> ranlux64_base_01;
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typedef discard_block<subtract_with_carry< ::boost::int32_t, (1<<24), 10, 24>, 223, 24> ranlux3;
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typedef discard_block<subtract_with_carry< ::boost::int32_t, (1<<24), 10, 24>, 389, 24> ranlux4;
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typedef discard_block<subtract_with_carry_01<float, 24, 10, 24>, 223, 24> ranlux3_01;
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typedef discard_block<subtract_with_carry_01<float, 24, 10, 24>, 389, 24> ranlux4_01;
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#ifndef __SUNPRO_CC
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using ::boost::random_device;
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#endif
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using ::boost::uniform_int;
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class bernoulli_distribution
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{
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public:
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// types
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typedef int input_type;
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typedef bool result_type;
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// constructors and member function
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explicit bernoulli_distribution(double p = 0.5)
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: m_dist(p){}
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double p() const
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{ return m_dist.p(); }
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void reset()
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{ m_dist.reset(); }
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template<class UniformRandomNumberGenerator>
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result_type operator()(UniformRandomNumberGenerator& urng)
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{
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return m_dist(urng);
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}
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#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<class CharT, class Traits>
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friend std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits>& os,
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const bernoulli_distribution& lcg)
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{
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return os << lcg.m_dist;
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}
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template<class CharT, class Traits>
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friend std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits>& is,
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bernoulli_distribution& lcg)
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{
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return is >> lcg.m_dist;
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}
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#endif
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private:
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::boost::bernoulli_distribution<double> m_dist;
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};
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//using ::boost::bernoulli_distribution;
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using ::boost::geometric_distribution;
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using ::boost::poisson_distribution;
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using ::boost::binomial_distribution;
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|
using ::boost::uniform_real;
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using ::boost::exponential_distribution;
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using ::boost::normal_distribution;
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using ::boost::gamma_distribution;
|
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} }
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#endif
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#endif
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