diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/random/discard_block.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/epoc32/include/stdapis/boost/random/discard_block.hpp Tue Mar 16 16:12:26 2010 +0000 @@ -0,0 +1,121 @@ +/* boost random/discard_block.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: discard_block.hpp,v 1.12 2005/05/21 15:57:00 dgregor Exp $ + * + * Revision history + * 2001-03-02 created + */ + +#ifndef BOOST_RANDOM_DISCARD_BLOCK_HPP +#define BOOST_RANDOM_DISCARD_BLOCK_HPP + +#include +#include +#include +#include + + +namespace boost { +namespace random { + +template +class discard_block +{ +public: + typedef UniformRandomNumberGenerator base_type; + typedef typename base_type::result_type result_type; + + BOOST_STATIC_CONSTANT(bool, has_fixed_range = false); + BOOST_STATIC_CONSTANT(unsigned int, total_block = p); + BOOST_STATIC_CONSTANT(unsigned int, returned_block = r); + +#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS + BOOST_STATIC_ASSERT(total_block >= returned_block); +#endif + + discard_block() : _rng(), _n(0) { } + explicit discard_block(const base_type & rng) : _rng(rng), _n(0) { } + template discard_block(It& first, It last) + : _rng(first, last), _n(0) { } + void seed() { _rng.seed(); _n = 0; } + template void seed(T s) { _rng.seed(s); _n = 0; } + template void seed(It& first, It last) + { _n = 0; _rng.seed(first, last); } + + const base_type& base() const { return _rng; } + + result_type operator()() + { + if(_n >= returned_block) { + // discard values of random number generator + for( ; _n < total_block; ++_n) + _rng(); + _n = 0; + } + ++_n; + return _rng(); + } + + 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 true; } // dummy + +#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE + +#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS + template + friend std::basic_ostream& + operator<<(std::basic_ostream& os, const discard_block& s) + { + os << s._rng << " " << s._n << " "; + return os; + } + + template + friend std::basic_istream& + operator>>(std::basic_istream& is, discard_block& s) + { + is >> s._rng >> std::ws >> s._n >> std::ws; + return is; + } +#endif + + friend bool operator==(const discard_block& x, const discard_block& y) + { return x._rng == y._rng && x._n == y._n; } + friend bool operator!=(const discard_block& x, const discard_block& y) + { return !(x == y); } +#else + // Use a member function; Streamable concept not supported. + bool operator==(const discard_block& rhs) const + { return _rng == rhs._rng && _n == rhs._n; } + bool operator!=(const discard_block& rhs) const + { return !(*this == rhs); } +#endif + +private: + base_type _rng; + unsigned int _n; +}; + +#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION +// A definition is required even for integral static constants +template +const bool discard_block::has_fixed_range; +template +const unsigned int discard_block::total_block; +template +const unsigned int discard_block::returned_block; +#endif + +} // namespace random + +} // namespace boost + +#endif // BOOST_RANDOM_DISCARD_BLOCK_HPP