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fixed seeding of rng

This commit is contained in:
Jan Steemann 2012-09-25 09:27:43 +02:00
parent 27dc95dd35
commit aeb9f5126b
1 changed files with 4 additions and 7 deletions
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11
lib/Basics/Random.cpp
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@ -376,15 +376,12 @@ namespace triagens {
// MERSENNE // MERSENNE
struct UniformIntegerMersenne : public UniformIntegerImpl { struct UniformIntegerMersenne : public UniformIntegerImpl {
int32_t random (int32_t left, int32_t right) { int32_t random (int32_t left, int32_t right) {
RandMT randomGenerator((uint32_t) time(NULL)); RandMT randomGenerator((uint32_t) RandomHelper::RandomDevice::getSeed());
int32_t result = ((int32_t) randomGenerator.randomMT()) + left; const int32_t range = right - left + 1;
int32_t result = ((int32_t) randomGenerator.randomMT());
if (result > right) {
result %= right;
result += left;
}
result = (int32_t) abs(result % range) + left;
return result; return result;
} }
}; };