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/* ========================================================================== */
/* === Source/Mongoose_Random.cpp =========================================== */
/* ========================================================================== */
/* -----------------------------------------------------------------------------
* Mongoose Graph Partitioning Library Copyright (C) 2017-2018,
* Scott P. Kolodziej, Nuri S. Yeralan, Timothy A. Davis, William W. Hager
* Mongoose is licensed under Version 3 of the GNU General Public License.
* Mongoose is also available under other licenses; contact authors for details.
* -------------------------------------------------------------------------- */
#include "Mongoose_Random.hpp"
#if CPP11_OR_LATER
#include <random>
#endif
namespace Mongoose
{
#if CPP11_OR_LATER
std::random_device rd;
std::ranlux24_base generator(rd());
std::uniform_int_distribution<> distribution;
#endif
Int random()
{
#if CPP11_OR_LATER
// Use C++11 random object
return distribution(generator);
#else
// Forced to use non-reentrant std::rand
return std::rand();
#endif
}
void setRandomSeed(Int seed)
{
#if CPP11_OR_LATER
// Use C++11 random object
generator.seed(static_cast<unsigned int>(seed));
#else
// Forced to use non-reentrant std::rand
std::srand(static_cast<unsigned int>(seed));
#endif
}
} // end namespace Mongoose
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