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204 lines
5.8 KiB
204 lines
5.8 KiB
![]()
11 years ago
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/*
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* Copyright 2008-2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <thrust/random/xor_combine_engine.h>
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#include <thrust/random/detail/random_core_access.h>
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namespace thrust
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{
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namespace random
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{
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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xor_combine_engine<Engine1,s1,Engine2,s2>
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::xor_combine_engine(void)
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:m_b1(),m_b2()
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{
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} // end xor_combine_engine::xor_combine_engine()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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xor_combine_engine<Engine1,s1,Engine2,s2>
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::xor_combine_engine(const base1_type &urng1, const base2_type &urng2)
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:m_b1(urng1),m_b2(urng2)
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{
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} // end xor_combine_engine::xor_combine_engine()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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xor_combine_engine<Engine1,s1,Engine2,s2>
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::xor_combine_engine(result_type s)
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:m_b1(s),m_b2(s)
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{
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} // end xor_combine_engine::xor_combine_engine()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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void xor_combine_engine<Engine1,s1,Engine2,s2>
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::seed(void)
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{
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m_b1.seed();
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m_b2.seed();
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} // end xor_combine_engine::seed()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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void xor_combine_engine<Engine1,s1,Engine2,s2>
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::seed(result_type s)
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{
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m_b1.seed(s);
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m_b2.seed(s);
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} // end xor_combine_engine::seed()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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const typename xor_combine_engine<Engine1,s1,Engine2,s2>::base1_type &
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xor_combine_engine<Engine1,s1,Engine2,s2>
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::base1(void) const
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{
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return m_b1;
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} // end xor_combine_engine::base1()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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const typename xor_combine_engine<Engine1,s1,Engine2,s2>::base2_type &
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xor_combine_engine<Engine1,s1,Engine2,s2>
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::base2(void) const
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{
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return m_b2;
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} // end xor_combine_engine::base2()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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typename xor_combine_engine<Engine1,s1,Engine2,s2>::result_type
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xor_combine_engine<Engine1,s1,Engine2,s2>
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::operator()(void)
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{
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return (result_type(m_b1() - base1_type::min) << shift1) ^
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(result_type(m_b2() - base2_type::min) << shift2);
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} // end xor_combine_engine::operator()()
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template<typename Engine1, size_t s1,
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typename Engine2, size_t s2>
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void xor_combine_engine<Engine1, s1, Engine2, s2>
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::discard(unsigned long long z)
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{
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for(; z > 0; --z)
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{
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this->operator()();
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} // end for
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} // end xor_combine_engine::discard()
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template<typename Engine1, size_t s1, typename Engine2, size_t s2>
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template<typename CharT, typename Traits>
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std::basic_ostream<CharT,Traits>& xor_combine_engine<Engine1,s1,Engine2,s2>
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::stream_out(std::basic_ostream<CharT,Traits> &os) const
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{
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typedef std::basic_ostream<CharT,Traits> ostream_type;
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typedef typename ostream_type::ios_base ios_base;
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// save old flags and fill character
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const typename ios_base::fmtflags flags = os.flags();
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const CharT fill = os.fill();
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const CharT space = os.widen(' ');
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os.flags(ios_base::dec | ios_base::fixed | ios_base::left);
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os.fill(space);
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// output each base engine in turn
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os << base1() << space << base2();
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// restore old flags and fill character
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os.flags(flags);
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os.fill(fill);
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return os;
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}
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template<typename Engine1, size_t s1, typename Engine2, size_t s2>
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template<typename CharT, typename Traits>
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std::basic_istream<CharT,Traits>& xor_combine_engine<Engine1,s1,Engine2,s2>
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::stream_in(std::basic_istream<CharT,Traits> &is)
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{
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typedef std::basic_istream<CharT,Traits> istream_type;
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typedef typename istream_type::ios_base ios_base;
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// save old flags
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const typename ios_base::fmtflags flags = is.flags();
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is.flags(ios_base::skipws);
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// input each base engine in turn
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is >> m_b1 >> m_b2;
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// restore old flags
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is.flags(flags);
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return is;
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}
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template<typename Engine1, size_t s1, typename Engine2, size_t s2>
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bool xor_combine_engine<Engine1,s1,Engine2,s2>
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::equal(const xor_combine_engine<Engine1,s1,Engine2,s2> &rhs) const
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{
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return (m_b1 == rhs.m_b1) && (m_b2 == rhs.m_b2);
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}
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template<typename Engine1, size_t s1, typename Engine2, size_t s2,
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typename CharT, typename Traits>
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std::basic_ostream<CharT,Traits>&
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operator<<(std::basic_ostream<CharT,Traits> &os,
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const xor_combine_engine<Engine1,s1,Engine2,s2> &e)
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{
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return thrust::random::detail::random_core_access::stream_out(os,e);
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}
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template<typename Engine1, size_t s1, typename Engine2, size_t s2,
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typename CharT, typename Traits>
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std::basic_istream<CharT,Traits>&
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operator>>(std::basic_istream<CharT,Traits> &is,
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xor_combine_engine<Engine1,s1,Engine2,s2> &e)
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{
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return thrust::random::detail::random_core_access::stream_in(is,e);
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}
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template<typename Engine1, size_t s1, typename Engine2, size_t s2>
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bool operator==(const xor_combine_engine<Engine1,s1,Engine2,s2> &lhs,
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const xor_combine_engine<Engine1,s1,Engine2,s2> &rhs)
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{
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return thrust::random::detail::random_core_access::equal(lhs,rhs);
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}
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template<typename Engine1, size_t s1, typename Engine2, size_t s2>
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bool operator!=(const xor_combine_engine<Engine1,s1,Engine2,s2> &lhs,
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const xor_combine_engine<Engine1,s1,Engine2,s2> &rhs)
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{
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return !(lhs == rhs);
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}
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} // end random
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} // end thrust
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