- switch (current_rng) {
- case XBT_RNG_xbt:
- return xbt_uniform_int(min, max);
- case XBT_RNG_std: {
- std::uniform_int_distribution<> dist(min, max);
- return dist(mt19937_gen);
- }
- default:
- xbt_assert(false, "The uniform integer distribution is not yet supported for the current RNG.");
- }
-}
-
-int xbt_uniform_int(int min, int max)
-{
- unsigned long gmin = mt19937_gen.min();
- unsigned long gmax = mt19937_gen.max();
- unsigned long grange = gmax - gmin + 1;
- unsigned long range = max - min + 1;
- xbt_assert(
- min <= max,
- "The maximum value for the uniform integer distribution must be greater than or equal to the minimum value");
- xbt_assert(range <= grange, "The current implementation of the uniform integer distribution does not allow range to "
- "be higher than mt19937's range");
- unsigned long mult = grange / range;
- unsigned long maxallowed = gmin + (mult + 1) * range - 1;
- while (true) {
- unsigned long value = mt19937_gen();
- if (value > maxallowed) {
- } else {
- return value % range + min;
- }
- }
+ std::uniform_int_distribution<> dist(min, max);
+ return dist(mt19937_gen);