diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/random/inversive_congruential.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/epoc32/include/stdapis/boost/random/inversive_congruential.hpp Tue Mar 16 16:12:26 2010 +0000 @@ -0,0 +1,127 @@ +/* boost random/inversive_congruential.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: inversive_congruential.hpp,v 1.11 2005/05/21 15:57:00 dgregor Exp $ + * + * Revision history + * 2001-02-18 moved to individual header files + */ + +#ifndef BOOST_RANDOM_INVERSIVE_CONGRUENTIAL_HPP +#define BOOST_RANDOM_INVERSIVE_CONGRUENTIAL_HPP + +#include <iostream> +#include <cassert> +#include <boost/config.hpp> +#include <boost/static_assert.hpp> +#include <boost/random/detail/const_mod.hpp> + +namespace boost { +namespace random { + +// Eichenauer and Lehn 1986 +template<class IntType, IntType a, IntType b, IntType p, IntType val> +class inversive_congruential +{ +public: + typedef IntType result_type; +#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION + static const bool has_fixed_range = true; + static const result_type min_value = (b == 0 ? 1 : 0); + static const result_type max_value = p-1; +#else + BOOST_STATIC_CONSTANT(bool, has_fixed_range = false); +#endif + BOOST_STATIC_CONSTANT(result_type, multiplier = a); + BOOST_STATIC_CONSTANT(result_type, increment = b); + BOOST_STATIC_CONSTANT(result_type, modulus = p); + + result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return b == 0 ? 1 : 0; } + result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return p-1; } + + explicit inversive_congruential(IntType y0 = 1) : value(y0) + { + BOOST_STATIC_ASSERT(b >= 0); + BOOST_STATIC_ASSERT(p > 1); + BOOST_STATIC_ASSERT(a >= 1); + if(b == 0) + assert(y0 > 0); + } + template<class It> inversive_congruential(It& first, It last) + { seed(first, last); } + + void seed(IntType y0 = 1) { value = y0; if(b == 0) assert(y0 > 0); } + template<class It> void seed(It& first, It last) + { + if(first == last) + throw std::invalid_argument("inversive_congruential::seed"); + value = *first++; + } + IntType operator()() + { + typedef const_mod<IntType, p> do_mod; + value = do_mod::mult_add(a, do_mod::invert(value), b); + return value; + } + + bool validation(result_type x) const { return val == x; } + +#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE + +#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS + template<class CharT, class Traits> + friend std::basic_ostream<CharT,Traits>& + operator<<(std::basic_ostream<CharT,Traits>& os, inversive_congruential x) + { os << x.value; return os; } + + template<class CharT, class Traits> + friend std::basic_istream<CharT,Traits>& + operator>>(std::basic_istream<CharT,Traits>& is, inversive_congruential& x) + { is >> x.value; return is; } +#endif + + friend bool operator==(inversive_congruential x, inversive_congruential y) + { return x.value == y.value; } + friend bool operator!=(inversive_congruential x, inversive_congruential y) + { return !(x == y); } +#else + // Use a member function; Streamable concept not supported. + bool operator==(inversive_congruential rhs) const + { return value == rhs.value; } + bool operator!=(inversive_congruential rhs) const + { return !(*this == rhs); } +#endif +private: + IntType value; +}; + +#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION +// A definition is required even for integral static constants +template<class IntType, IntType a, IntType b, IntType p, IntType val> +const bool inversive_congruential<IntType, a, b, p, val>::has_fixed_range; +template<class IntType, IntType a, IntType b, IntType p, IntType val> +const typename inversive_congruential<IntType, a, b, p, val>::result_type inversive_congruential<IntType, a, b, p, val>::min_value; +template<class IntType, IntType a, IntType b, IntType p, IntType val> +const typename inversive_congruential<IntType, a, b, p, val>::result_type inversive_congruential<IntType, a, b, p, val>::max_value; +template<class IntType, IntType a, IntType b, IntType p, IntType val> +const typename inversive_congruential<IntType, a, b, p, val>::result_type inversive_congruential<IntType, a, b, p, val>::multiplier; +template<class IntType, IntType a, IntType b, IntType p, IntType val> +const typename inversive_congruential<IntType, a, b, p, val>::result_type inversive_congruential<IntType, a, b, p, val>::increment; +template<class IntType, IntType a, IntType b, IntType p, IntType val> +const typename inversive_congruential<IntType, a, b, p, val>::result_type inversive_congruential<IntType, a, b, p, val>::modulus; +#endif + +} // namespace random + +typedef random::inversive_congruential<int32_t, 9102, 2147483647-36884165, + 2147483647, 0> hellekalek1995; + +} // namespace boost + +#endif // BOOST_RANDOM_INVERSIVE_CONGRUENTIAL_HPP