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Diffstat (limited to '3rdParty/Boost/src/boost/random/linear_congruential.hpp')
-rw-r--r--3rdParty/Boost/src/boost/random/linear_congruential.hpp403
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diff --git a/3rdParty/Boost/src/boost/random/linear_congruential.hpp b/3rdParty/Boost/src/boost/random/linear_congruential.hpp
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@@ -1,403 +0,0 @@
-/* boost random/linear_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: linear_congruential.hpp 60755 2010-03-22 00:45:06Z steven_watanabe $
- *
- * Revision history
- * 2001-02-18 moved to individual header files
- */
-
-#ifndef BOOST_RANDOM_LINEAR_CONGRUENTIAL_HPP
-#define BOOST_RANDOM_LINEAR_CONGRUENTIAL_HPP
-
-#include <iostream>
-#include <cassert>
-#include <stdexcept>
-#include <boost/config.hpp>
-#include <boost/limits.hpp>
-#include <boost/static_assert.hpp>
-#include <boost/random/detail/config.hpp>
-#include <boost/random/detail/const_mod.hpp>
-#include <boost/detail/workaround.hpp>
-
-#include <boost/random/detail/disable_warnings.hpp>
-
-namespace boost {
-namespace random {
-
-/**
- * Instantiations of class template linear_congruential model a
- * \pseudo_random_number_generator. Linear congruential pseudo-random
- * number generators are described in:
- *
- * "Mathematical methods in large-scale computing units", D. H. Lehmer,
- * Proc. 2nd Symposium on Large-Scale Digital Calculating Machines,
- * Harvard University Press, 1951, pp. 141-146
- *
- * Let x(n) denote the sequence of numbers returned by some pseudo-random
- * number generator. Then for the linear congruential generator,
- * x(n+1) := (a * x(n) + c) mod m. Parameters for the generator are
- * x(0), a, c, m. The template parameter IntType shall denote an integral
- * type. It must be large enough to hold values a, c, and m. The template
- * parameters a and c must be smaller than m.
- *
- * Note: The quality of the generator crucially depends on the choice of
- * the parameters. User code should use one of the sensibly parameterized
- * generators such as minstd_rand instead.
- */
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-class linear_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 = ( c == 0 ? 1 : 0 );
- static const result_type max_value = m-1;
-#else
- BOOST_STATIC_CONSTANT(bool, has_fixed_range = false);
-#endif
- BOOST_STATIC_CONSTANT(IntType, multiplier = a);
- BOOST_STATIC_CONSTANT(IntType, increment = c);
- BOOST_STATIC_CONSTANT(IntType, modulus = m);
-
- // MSVC 6 and possibly others crash when encountering complicated integral
- // constant expressions. Avoid the check for now.
- // BOOST_STATIC_ASSERT(m == 0 || a < m);
- // BOOST_STATIC_ASSERT(m == 0 || c < m);
-
- /**
- * Constructs a linear_congruential generator, seeding it with @c x0.
- */
- explicit linear_congruential(IntType x0 = 1)
- {
- seed(x0);
-
- // MSVC fails BOOST_STATIC_ASSERT with std::numeric_limits at class scope
-#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
- BOOST_STATIC_ASSERT(std::numeric_limits<IntType>::is_integer);
-#endif
- }
-
- /**
- * Constructs a @c linear_congruential generator and seeds it
- * with values taken from the itrator range [first, last)
- * and adjusts first to point to the element after the last one
- * used. If there are not enough elements, throws @c std::invalid_argument.
- *
- * first and last must be input iterators.
- */
- template<class It>
- linear_congruential(It& first, It last)
- {
- seed(first, last);
- }
-
- // compiler-generated copy constructor and assignment operator are fine
-
- /**
- * If c mod m is zero and x0 mod m is zero, changes the current value of
- * the generator to 1. Otherwise, changes it to x0 mod m. If c is zero,
- * distinct seeds in the range [1,m) will leave the generator in distinct
- * states. If c is not zero, the range is [0,m).
- */
- void seed(IntType x0 = 1)
- {
- // wrap _x if it doesn't fit in the destination
- if(modulus == 0) {
- _x = x0;
- } else {
- _x = x0 % modulus;
- }
- // handle negative seeds
- if(_x <= 0 && _x != 0) {
- _x += modulus;
- }
- // adjust to the correct range
- if(increment == 0 && _x == 0) {
- _x = 1;
- }
- assert(_x >= (min)());
- assert(_x <= (max)());
- }
-
- /**
- * seeds a @c linear_congruential generator with values taken
- * from the itrator range [first, last) and adjusts @c first to
- * point to the element after the last one used. If there are
- * not enough elements, throws @c std::invalid_argument.
- *
- * @c first and @c last must be input iterators.
- */
- template<class It>
- void seed(It& first, It last)
- {
- if(first == last)
- throw std::invalid_argument("linear_congruential::seed");
- seed(*first++);
- }
-
- /**
- * Returns the smallest value that the @c linear_congruential generator
- * can produce.
- */
- result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return c == 0 ? 1 : 0; }
- /**
- * Returns the largest value that the @c linear_congruential generator
- * can produce.
- */
- result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return modulus-1; }
-
- /** Returns the next value of the @c linear_congruential generator. */
- IntType operator()()
- {
- _x = const_mod<IntType, m>::mult_add(a, _x, c);
- return _x;
- }
-
- static bool validation(IntType x) { return val == x; }
-
-#ifdef BOOST_NO_OPERATORS_IN_NAMESPACE
-
- // Use a member function; Streamable concept not supported.
- bool operator==(const linear_congruential& rhs) const
- { return _x == rhs._x; }
- bool operator!=(const linear_congruential& rhs) const
- { return !(*this == rhs); }
-
-#else
- friend bool operator==(const linear_congruential& x,
- const linear_congruential& y)
- { return x._x == y._x; }
- friend bool operator!=(const linear_congruential& x,
- const linear_congruential& y)
- { return !(x == y); }
-
-#if !defined(BOOST_RANDOM_NO_STREAM_OPERATORS) && !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
- template<class CharT, class Traits>
- friend std::basic_ostream<CharT,Traits>&
- operator<<(std::basic_ostream<CharT,Traits>& os,
- const linear_congruential& lcg)
- {
- return os << lcg._x;
- }
-
- template<class CharT, class Traits>
- friend std::basic_istream<CharT,Traits>&
- operator>>(std::basic_istream<CharT,Traits>& is,
- linear_congruential& lcg)
- {
- return is >> lcg._x;
- }
-
-private:
-#endif
-#endif
-
- IntType _x;
-};
-
-// probably needs the "no native streams" caveat for STLPort
-#if !defined(__SGI_STL_PORT) && BOOST_WORKAROUND(__GNUC__, == 2)
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-std::ostream&
-operator<<(std::ostream& os,
- const linear_congruential<IntType,a,c,m,val>& lcg)
-{
- return os << lcg._x;
-}
-
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-std::istream&
-operator>>(std::istream& is,
- linear_congruential<IntType,a,c,m,val>& lcg)
-{
- return is >> lcg._x;
-}
-#elif defined(BOOST_RANDOM_NO_STREAM_OPERATORS) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
-template<class CharT, class Traits, class IntType, IntType a, IntType c, IntType m, IntType val>
-std::basic_ostream<CharT,Traits>&
-operator<<(std::basic_ostream<CharT,Traits>& os,
- const linear_congruential<IntType,a,c,m,val>& lcg)
-{
- return os << lcg._x;
-}
-
-template<class CharT, class Traits, class IntType, IntType a, IntType c, IntType m, IntType val>
-std::basic_istream<CharT,Traits>&
-operator>>(std::basic_istream<CharT,Traits>& is,
- linear_congruential<IntType,a,c,m,val>& lcg)
-{
- return is >> lcg._x;
-}
-#endif
-
-#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
-// A definition is required even for integral static constants
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-const bool linear_congruential<IntType, a, c, m, val>::has_fixed_range;
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-const typename linear_congruential<IntType, a, c, m, val>::result_type linear_congruential<IntType, a, c, m, val>::min_value;
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-const typename linear_congruential<IntType, a, c, m, val>::result_type linear_congruential<IntType, a, c, m, val>::max_value;
-template<class IntType, IntType a, IntType c, IntType m, IntType val>
-const IntType linear_congruential<IntType,a,c,m,val>::modulus;
-#endif
-
-} // namespace random
-
-// validation values from the publications
-/**
- * The specialization \minstd_rand0 was originally suggested in
- *
- * @blockquote
- * A pseudo-random number generator for the System/360, P.A. Lewis,
- * A.S. Goodman, J.M. Miller, IBM Systems Journal, Vol. 8, No. 2,
- * 1969, pp. 136-146
- * @endblockquote
- *
- * It is examined more closely together with \minstd_rand in
- *
- * @blockquote
- * "Random Number Generators: Good ones are hard to find",
- * Stephen K. Park and Keith W. Miller, Communications of
- * the ACM, Vol. 31, No. 10, October 1988, pp. 1192-1201
- * @endblockquote
- */
-typedef random::linear_congruential<int32_t, 16807, 0, 2147483647,
- 1043618065> minstd_rand0;
-
-/** The specialization \minstd_rand was suggested in
- *
- * @blockquote
- * "Random Number Generators: Good ones are hard to find",
- * Stephen K. Park and Keith W. Miller, Communications of
- * the ACM, Vol. 31, No. 10, October 1988, pp. 1192-1201
- * @endblockquote
- */
-typedef random::linear_congruential<int32_t, 48271, 0, 2147483647,
- 399268537> minstd_rand;
-
-
-#if !defined(BOOST_NO_INT64_T) && !defined(BOOST_NO_INTEGRAL_INT64_T)
-/** Class @c rand48 models a \pseudo_random_number_generator. It uses
- * the linear congruential algorithm with the parameters a = 0x5DEECE66D,
- * c = 0xB, m = 2**48. It delivers identical results to the @c lrand48()
- * function available on some systems (assuming lcong48 has not been called).
- *
- * It is only available on systems where @c uint64_t is provided as an
- * integral type, so that for example static in-class constants and/or
- * enum definitions with large @c uint64_t numbers work.
- */
-class rand48
-{
-public:
- typedef int32_t result_type;
-#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
- static const bool has_fixed_range = true;
- static const int32_t min_value = 0;
- static const int32_t max_value = integer_traits<int32_t>::const_max;
-#else
- enum { has_fixed_range = false };
-#endif
- /**
- * Returns the smallest value that the generator can produce
- */
- int32_t min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return 0; }
- /**
- * Returns the largest value that the generator can produce
- */
- int32_t max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return std::numeric_limits<int32_t>::max BOOST_PREVENT_MACRO_SUBSTITUTION (); }
-
-#ifdef BOOST_RANDOM_DOXYGEN
- /**
- * If T is an integral type smaller than int46_t, constructs
- * a \rand48 generator with x(0) := (x0 << 16) | 0x330e. Otherwise
- * constructs a \rand48 generator with x(0) = x0.
- */
- template<class T> explicit rand48(T x0 = 1);
-#else
- rand48() : lcf(cnv(static_cast<int32_t>(1))) {}
- template<class T> explicit rand48(T x0) : lcf(cnv(x0)) { }
-#endif
- template<class It> rand48(It& first, It last) : lcf(first, last) { }
-
- // compiler-generated copy ctor and assignment operator are fine
-
-#ifdef BOOST_RANDOM_DOXYGEN
- /**
- * If T is an integral type smaller than int46_t, changes
- * the current value x(n) of the generator to (x0 << 16) | 0x330e.
- * Otherwise changes the current value x(n) to x0.
- */
- template<class T> void seed(T x0 = 1);
-#else
- void seed() { seed(static_cast<int32_t>(1)); }
- template<class T> void seed(T x0) { lcf.seed(cnv(x0)); }
-#endif
- template<class It> void seed(It& first, It last) { lcf.seed(first,last); }
-
- /**
- * Returns the next value of the generator.
- */
- int32_t operator()() { return static_cast<int32_t>(lcf() >> 17); }
- // by experiment from lrand48()
- static bool validation(int32_t x) { return x == 1993516219; }
-
-#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
-
-#ifndef BOOST_RANDOM_NO_STREAM_OPERATORS
- template<class CharT,class Traits>
- friend std::basic_ostream<CharT,Traits>&
- operator<<(std::basic_ostream<CharT,Traits>& os, const rand48& r)
- { os << r.lcf; return os; }
-
- template<class CharT,class Traits>
- friend std::basic_istream<CharT,Traits>&
- operator>>(std::basic_istream<CharT,Traits>& is, rand48& r)
- { is >> r.lcf; return is; }
-#endif
-
- friend bool operator==(const rand48& x, const rand48& y)
- { return x.lcf == y.lcf; }
- friend bool operator!=(const rand48& x, const rand48& y)
- { return !(x == y); }
-#else
- // Use a member function; Streamable concept not supported.
- bool operator==(const rand48& rhs) const
- { return lcf == rhs.lcf; }
- bool operator!=(const rand48& rhs) const
- { return !(*this == rhs); }
-#endif
-private:
- /// \cond hide_private_members
- random::linear_congruential<uint64_t,
- uint64_t(0xDEECE66DUL) | (uint64_t(0x5) << 32), // xxxxULL is not portable
- 0xB, uint64_t(1)<<48, /* unknown */ 0> lcf;
- template<class T>
- static uint64_t cnv(T x)
- {
- if(sizeof(T) < sizeof(uint64_t)) {
- return (static_cast<uint64_t>(x) << 16) | 0x330e;
- } else {
- return(static_cast<uint64_t>(x));
- }
- }
- static uint64_t cnv(float x) { return(static_cast<uint64_t>(x)); }
- static uint64_t cnv(double x) { return(static_cast<uint64_t>(x)); }
- static uint64_t cnv(long double x) { return(static_cast<uint64_t>(x)); }
- /// \endcond
-};
-#endif /* !BOOST_NO_INT64_T && !BOOST_NO_INTEGRAL_INT64_T */
-
-} // namespace boost
-
-#include <boost/random/detail/enable_warnings.hpp>
-
-#endif // BOOST_RANDOM_LINEAR_CONGRUENTIAL_HPP