diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/random/xor_combine.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/epoc32/include/stdapis/boost/random/xor_combine.hpp Tue Mar 16 16:12:26 2010 +0000 @@ -0,0 +1,130 @@ +/* boost random/xor_combine.hpp header file + * + * Copyright Jens Maurer 2002 + * 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: xor_combine.hpp,v 1.13 2005/05/21 15:57:00 dgregor Exp $ + * + */ + +#ifndef BOOST_RANDOM_XOR_COMBINE_HPP +#define BOOST_RANDOM_XOR_COMBINE_HPP + +#include +#include +#include // for std::min and std::max +#include +#include +#include +#include // uint32_t + + +namespace boost { +namespace random { + +template +class xor_combine +{ +public: + typedef URNG1 base1_type; + typedef URNG2 base2_type; + typedef typename base1_type::result_type result_type; + + BOOST_STATIC_CONSTANT(bool, has_fixed_range = false); + BOOST_STATIC_CONSTANT(int, shift1 = s1); + BOOST_STATIC_CONSTANT(int, shfit2 = s2); + + xor_combine() : _rng1(), _rng2() + { } + xor_combine(const base1_type & rng1, const base2_type & rng2) + : _rng1(rng1), _rng2(rng2) { } + template xor_combine(It& first, It last) + : _rng1(first, last), _rng2( /* advanced by other call */ first, last) { } + void seed() { _rng1.seed(); _rng2.seed(); } + template void seed(It& first, It last) + { + _rng1.seed(first, last); + _rng2.seed(first, last); + } + + const base1_type& base1() { return _rng1; } + const base2_type& base2() { return _rng2; } + + result_type operator()() + { + // MSVC fails BOOST_STATIC_ASSERT with std::numeric_limits at class scope +#if !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) && !(defined(BOOST_MSVC) && BOOST_MSVC <= 1300) + BOOST_STATIC_ASSERT(std::numeric_limits::is_integer); + BOOST_STATIC_ASSERT(std::numeric_limits::is_integer); + BOOST_STATIC_ASSERT(std::numeric_limits::digits >= std::numeric_limits::digits); +#endif + return (_rng1() << s1) ^ (_rng2() << s2); + } + + result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return std::min BOOST_PREVENT_MACRO_SUBSTITUTION((_rng1.min)(), (_rng2.min)()); } + result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return std::max BOOST_PREVENT_MACRO_SUBSTITUTION((_rng1.min)(), (_rng2.max)()); } + static bool validation(result_type x) { return val == x; } + +#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE + +#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS + template + friend std::basic_ostream& + operator<<(std::basic_ostream& os, const xor_combine& s) + { + os << s._rng1 << " " << s._rng2 << " "; + return os; + } + + template + friend std::basic_istream& + operator>>(std::basic_istream& is, xor_combine& s) + { + is >> s._rng1 >> std::ws >> s._rng2 >> std::ws; + return is; + } +#endif + + friend bool operator==(const xor_combine& x, const xor_combine& y) + { return x._rng1 == y._rng1 && x._rng2 == y._rng2; } + friend bool operator!=(const xor_combine& x, const xor_combine& y) + { return !(x == y); } +#else + // Use a member function; Streamable concept not supported. + bool operator==(const xor_combine& rhs) const + { return _rng1 == rhs._rng1 && _rng2 == rhs._rng2; } + bool operator!=(const xor_combine& rhs) const + { return !(*this == rhs); } +#endif + +private: + base1_type _rng1; + base2_type _rng2; +}; + +#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION +// A definition is required even for integral static constants +template +const bool xor_combine::has_fixed_range; +#endif + +} // namespace random +} // namespace boost + +#endif // BOOST_RANDOM_XOR_COMBINE_HPP