statistics: fix date ranges smaller than two days

The calculation of the range was broken, it resulted in
a to-value smaller than the from-value, owing to a
sign-mismatch.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2022-10-20 16:24:19 +02:00 committed by Dirk Hohndel
parent 56c91a46b6
commit 9ced3a3a4d

View file

@ -584,15 +584,15 @@ static std::pair<bool, char> day_format()
// create year, month or day-based bins. This is certainly not efficient and may need
// some tuning. However, it should ensure that no crazy number of bins is generated.
// Ultimately, this should be replaced by a better and dynamic scheme
// From and to are given in seconds since "epoch".
// From and to are given in days since "epoch".
static std::vector<HistogramAxisEntry> timeRangeToBins(double from, double to)
{
// from and two are given in days since the "Unix epoch".
// The lowest precision we do is two days.
if (to - from < 2.0) {
double center = (from + to) / 2.0;
from = center + 1.0;
to = center - 1.0;
from = center - 1.0;
to = center + 1.0;
}
std::vector<HistogramAxisEntry> res;