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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <time.h>
#include <random>
#include <formula/random.hxx>
#include <rtl/instance.hxx>
namespace {
struct CalcFormulaRandomGenerator
{
std::mt19937 aRng;
CalcFormulaRandomGenerator()
{
// initialises the state of this RNG.
// should only be called once.
bool bRepeatable = (getenv("SC_RAND_REPEATABLE") != 0);
aRng.seed(bRepeatable ? 42 : time(NULL));
}
};
class theCalcFormulaRandomGenerator : public rtl::Static<CalcFormulaRandomGenerator, theCalcFormulaRandomGenerator> {};
}
namespace formula
{
namespace rng
{
double fRandom(double a, double b)
{
std::uniform_real_distribution<double> dist(a, b);
return dist(theCalcFormulaRandomGenerator::get().aRng);
}
sal_Int32 nRandom(sal_Int32 a, sal_Int32 b)
{
std::uniform_int_distribution<sal_Int32> dist(a, b);
return dist(theCalcFormulaRandomGenerator::get().aRng);
}
} // rng
} // formula
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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