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/* boost validate.cpp
*
* Copyright Jens Maurer 2000
* 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)
*
* $Id: validate.cpp 52492 2009-04-19 14:55:57Z steven_watanabe $
*/
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
#pragma warning( disable : 4786 )
#endif
#include <iostream>
#include <sstream>
#include <string>
#include <cmath>
#include <iterator>
#include <vector>
#include <boost/random.hpp>
#include <boost/config.hpp>
#include <boost/test/test_tools.hpp>
#include <boost/test/included/test_exec_monitor.hpp>
#ifdef BOOST_NO_STDC_NAMESPACE
namespace std { using ::abs; using ::fabs; using ::pow; }
#endif
/*
* General portability note:
* MSVC mis-compiles explicit function template instantiations.
* For example, f<A>() and f<B>() are both compiled to call f<A>().
* BCC is unable to implicitly convert a "const char *" to a std::string
* when using explicit function template instantiations.
*
* Therefore, avoid explicit function template instantiations.
*/
/*
* Validate correct implementation
*/
// own run
bool check(unsigned long x, const boost::mt11213b&) { return x == 3809585648U; }
// validation by experiment from mt19937.c
bool check(unsigned long x, const boost::mt19937&) { return x == 4123659995U; }
// validation values from the publications
bool check(int x, const boost::minstd_rand0&) { return x == 1043618065; }
// validation values from the publications
bool check(int x, const boost::minstd_rand&) { return x == 399268537; }
#if !defined(BOOST_NO_INT64_T) && !defined(BOOST_NO_INTEGRAL_INT64_T)
// by experiment from lrand48()
bool check(unsigned long x, const boost::rand48&) { return x == 1993516219; }
#endif
// ????
bool check(unsigned long x, const boost::taus88&) { return x == 3535848941U; }
// ????
bool check(int x, const boost::ecuyer1988&) { return x == 2060321752; }
// validation by experiment from Harry Erwin's generator.h (private e-mail)
bool check(unsigned int x, const boost::kreutzer1986&) { return x == 139726; }
bool check(double x, const boost::lagged_fibonacci607&) { return std::abs(x-0.401269) < 1e-5; }
// principal operation validated with CLHEP, values by experiment
bool check(unsigned long x, const boost::ranlux3&) { return x == 5957620; }
bool check(unsigned long x, const boost::ranlux4&) { return x == 8587295; }
bool check(float x, const boost::ranlux3_01&)
{ return std::abs(x-5957620/std::pow(2.0f,24)) < 1e-6; }
bool check(float x, const boost::ranlux4_01&)
{ return std::abs(x-8587295/std::pow(2.0f,24)) < 1e-6; }
bool check(double x, const boost::ranlux64_3_01&)
{ return std::abs(x-0.838413) < 1e-6; }
bool check(double x, const boost::ranlux64_4_01&)
{ return std::abs(x-0.59839) < 1e-6; }
template<class PRNG>
void validate(const std::string & name, const PRNG &)
{
std::cout << "validating " << name << ": ";
PRNG rng; // default ctor
for(int i = 0; i < 9999; i++)
rng();
typename PRNG::result_type val = rng();
// make sure the validation function is a static member
bool result = check(val, rng);
// allow for a simple eyeball check for MSVC instantiation brokenness
// (if the numbers for all generators are the same, it's obviously broken)
std::cout << val << std::endl;
BOOST_CHECK(result);
}
void validate_all()
{
using namespace boost;
#if !defined(BOOST_NO_INT64_T) && !defined(BOOST_NO_INTEGRAL_INT64_T)
validate("rand48", rand48());
#endif
validate("minstd_rand", minstd_rand());
validate("minstd_rand0", minstd_rand0());
validate("ecuyer combined", ecuyer1988());
validate("mt11213b", mt11213b());
validate("mt19937", mt19937());
validate("kreutzer1986", kreutzer1986());
validate("ranlux3", ranlux3());
validate("ranlux4", ranlux4());
validate("ranlux3_01", ranlux3_01());
validate("ranlux4_01", ranlux4_01());
validate("ranlux64_3_01", ranlux64_3_01());
validate("ranlux64_4_01", ranlux64_4_01());
validate("taus88", taus88());
validate("lagged_fibonacci607", lagged_fibonacci607());
}
int test_main(int, char*[])
{
validate_all();
return 0;
}
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