diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/random/shuffle_output.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/epoc32/include/stdapis/boost/random/shuffle_output.hpp Tue Mar 16 16:12:26 2010 +0000 @@ -0,0 +1,175 @@ +/* boost random/shuffle_output.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: shuffle_output.hpp,v 1.10 2005/08/25 16:27:22 johnmaddock Exp $ + * + * Revision history + * 2001-02-18 moved to individual header files + */ + +#ifndef BOOST_RANDOM_SHUFFLE_OUTPUT_HPP +#define BOOST_RANDOM_SHUFFLE_OUTPUT_HPP + +#include +#include // std::copy +#include +#include +#include +#include +#include +#include + +namespace boost { +namespace random { + +// Carter Bays and S.D. Durham 1979 +template +class shuffle_output +{ +public: + typedef UniformRandomNumberGenerator base_type; + typedef typename base_type::result_type result_type; + + BOOST_STATIC_CONSTANT(bool, has_fixed_range = false); + BOOST_STATIC_CONSTANT(int, buffer_size = k); + + shuffle_output() : _rng() { init(); } +#if defined(BOOST_MSVC) && _MSC_VER < 1300 + // MSVC does not implicitly generate the copy constructor here + shuffle_output(const shuffle_output & x) + : _rng(x._rng), y(x.y) { std::copy(x.v, x.v+k, v); } +#endif + template + explicit shuffle_output(T seed) : _rng(seed) { init(); } + explicit shuffle_output(const base_type & rng) : _rng(rng) { init(); } + template shuffle_output(It& first, It last) + : _rng(first, last) { init(); } + void seed() { _rng.seed(); init(); } + template + void seed(T s) { _rng.seed(s); init(); } + template void seed(It& first, It last) + { + _rng.seed(first, last); + init(); + } + + const base_type& base() const { return _rng; } + + result_type operator()() { + // calculating the range every time may seem wasteful. However, this + // makes the information locally available for the optimizer. + result_type range = (max)()-(min)()+1; + int j = k*(y-(min)())/range; + // assert(0 <= j && j < k); + y = v[j]; + v[j] = _rng(); + return y; + } + + result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return (_rng.min)(); } + result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return (_rng.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 shuffle_output& s) + { + os << s._rng << " " << s.y << " "; + for(int i = 0; i < s.buffer_size; ++i) + os << s.v[i] << " "; + return os; + } + + template + friend std::basic_istream& + operator>>(std::basic_istream& is, shuffle_output& s) + { + is >> s._rng >> std::ws >> s.y >> std::ws; + for(int i = 0; i < s.buffer_size; ++i) + is >> s.v[i] >> std::ws; + return is; + } +#endif + + friend bool operator==(const shuffle_output& x, const shuffle_output& y) + { return x._rng == y._rng && x.y == y.y && std::equal(x.v, x.v+k, y.v); } + friend bool operator!=(const shuffle_output& x, const shuffle_output& y) + { return !(x == y); } +#else + // Use a member function; Streamable concept not supported. + bool operator==(const shuffle_output& rhs) const + { return _rng == rhs._rng && y == rhs.y && std::equal(v, v+k, rhs.v); } + bool operator!=(const shuffle_output& rhs) const + { return !(*this == rhs); } +#endif +private: + void init() + { +#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS + BOOST_STATIC_ASSERT(std::numeric_limits::is_integer); +#endif + result_type range = (max)()-(min)(); + assert(range > 0); // otherwise there would be little choice + if(static_cast(k * range) < + static_cast(range)) // not a sufficient condition + // likely overflow with bucket number computation + assert(!"overflow will occur"); + + // we cannot use std::generate, because it uses pass-by-value for _rng + for(result_type * p = v; p != v+k; ++p) + *p = _rng(); + y = _rng(); + } + + base_type _rng; + result_type v[k]; + result_type y; +}; + +#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION +// A definition is required even for integral static constants +template +const bool shuffle_output::has_fixed_range; + +template +const int shuffle_output::buffer_size; +#endif + +} // namespace random + +// validation by experiment from Harry Erwin's generator.h (private e-mail) +typedef random::shuffle_output< + random::linear_congruential, + 97, 139726> kreutzer1986; + + +} // namespace boost + +#endif // BOOST_RANDOM_SHUFFLE_OUTPUT_HPP