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Remove dependency on Random in operators_test.cpp

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This commit is contained in:
Peter Dimov 2017-12-23 06:19:43 +02:00
parent 96fbce5759
commit c88936800d
2 changed files with 59 additions and 4 deletions
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55
include/boost/utility/detail/minstd_rand.hpp Normal file
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@ -0,0 +1,55 @@
#ifndef BOOST_UTILITY_DETAIL_MINSTD_RAND_HPP_INCLUDED
#define BOOST_UTILITY_DETAIL_MINSTD_RAND_HPP_INCLUDED
// Copyright 2017 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0.
//
// An implementation of minstd_rand that does not require
// the Random library
#include <boost/cstdint.hpp>
namespace boost
{
namespace detail
{
class minstd_rand
{
private:
boost::uint_least32_t x_;
enum { a = 48271, m = 2147483647 };
public:
minstd_rand(): x_( 1 )
{
}
explicit minstd_rand( boost::uint_least32_t x ): x_( x % m )
{
if( x_ == 0 )
{
x_ = 1;
}
}
boost::uint_least32_t operator()()
{
boost::uint_least64_t y = x_;
y = ( a * y ) % m;
x_ = static_cast<boost::uint_least32_t>( y );
return x_;
}
};
} // namespace detail
} // namespace boost
#endif // #ifndef BOOST_UTILITY_DETAIL_MINSTD_RAND_HPP_INCLUDED

8
test/operators_test.cpp
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@ -26,7 +26,7 @@
#include <boost/config.hpp> // for BOOST_MSVC
#include <boost/cstdlib.hpp> // for boost::exit_success
#include <boost/operators.hpp> // for the tested items
#include <boost/random/linear_congruential.hpp> // for boost::minstd_rand
#include <boost/utility/detail/minstd_rand.hpp> // for boost::detail::minstd_rand
#include <boost/test/test_tools.hpp> // for main
#include <iostream> // for std::cout (std::endl indirectly)
@ -532,7 +532,7 @@ namespace
template <class Big, class Small>
struct tester
{
void operator()(boost::minstd_rand& randomizer) const
void operator()(boost::detail::minstd_rand& randomizer) const
{
Big b1 = Big( randomizer() );
Big b2 = Big( randomizer() );
@ -546,7 +546,7 @@ namespace
template <class Big, class Small>
struct tester_left
{
void operator()(boost::minstd_rand& randomizer) const
void operator()(boost::detail::minstd_rand& randomizer) const
{
Big b1 = Big( randomizer() );
Small s = Small( randomizer() );
@ -620,7 +620,7 @@ test_main( int , char * [] )
for (int n = 0; n < 1000; ++n) // was 10,000 but took too long (Beman)
{
boost::minstd_rand r;
boost::detail::minstd_rand r;
tester<long, int>()(r);
tester<long, signed char>()(r);
tester<long, long>()(r);