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Re-use the same random engine

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as per https://github.com/rwengine/openrw/pull/682#discussion_r249476939
This commit is contained in:
tsjost 2021-10-12 20:05:11 +02:00
parent da8de34f7d
commit 74993e2a94
1 changed files with 5 additions and 2 deletions
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7
tests/test_Config.cpp
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@ -92,17 +92,20 @@ protected:
}
private:
static std::default_random_engine& getRandomEngine() {
static std::default_random_engine defaultRandomEngine = std::default_random_engine(std::random_device{}());
return defaultRandomEngine;
}
static std::string gen_random(size_t len) {
constexpr std::string_view alphanum =
"0123456789"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz";
std::default_random_engine reng(std::random_device{}());
std::uniform_int_distribution<size_t> dist(0u, alphanum.size());
std::string res;
res.reserve(len);
std::generate_n(std::back_inserter(res), len, [&]() {
return alphanum[dist(reng)];
return alphanum[dist(getRandomEngine())];
});
return res;
}