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Separate minute intervals

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Instead of mixing multiple rounding, use toStartOfMinuteInterval for all
minute related calculations
This commit is contained in:
Raúl Marín 2021-08-10 17:01:56 +02:00
parent ede5369265
commit 8bae14acb1
1 changed files with 16 additions and 17 deletions
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33
base/common/DateLUTImpl.h
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@ -257,7 +257,7 @@ private:
static_assert(std::is_integral_v<T> && std::is_integral_v<Divisor>);
assert(divisor > 0);
if (likely(offset_is_whole_number_of_hours_during_epoch || (offset_is_whole_number_of_minutes_during_epoch && (divisor % 60 == 0))))
if (likely(offset_is_whole_number_of_hours_during_epoch))
{
if (likely(x >= 0))
return x / divisor * divisor;
@ -500,10 +500,10 @@ public:
}
/// NOTE: Assuming timezone offset is a multiple of 15 minutes.
inline Time toStartOfMinute(Time t) const { return roundDown(t, 60); }
inline Time toStartOfFiveMinute(Time t) const { return roundDown(t, 300); }
inline Time toStartOfFifteenMinutes(Time t) const { return roundDown(t, 900); }
inline Time toStartOfTenMinutes(Time t) const { return roundDown(t, 600); }
inline Time toStartOfMinute(Time t) const { return toStartOfMinuteInterval(t, 1); }
inline Time toStartOfFiveMinute(Time t) const { return toStartOfMinuteInterval(t, 5); }
inline Time toStartOfFifteenMinutes(Time t) const { return toStartOfMinuteInterval(t, 15); }
inline Time toStartOfTenMinutes(Time t) const { return toStartOfMinuteInterval(t, 10); }
inline Time toStartOfHour(Time t) const { return roundDown(t, 3600); }
/** Number of calendar day since the beginning of UNIX epoch (1970-01-01 is zero)
@ -902,25 +902,24 @@ public:
inline Time toStartOfMinuteInterval(Time t, UInt64 minutes) const
{
if (minutes == 1)
return toStartOfMinute(t);
UInt64 divisor = 60 * minutes;
if (likely(offset_is_whole_number_of_minutes_during_epoch))
{
if (likely(t >= 0))
return t / divisor * divisor;
return (t + 1 - divisor) / divisor * divisor;
}
/** In contrast to "toStartOfHourInterval" function above,
* the minute intervals are not aligned to the midnight.
* You will get unexpected results if for example, you round down to 60 minute interval
* and there was a time shift to 30 minutes.
*
* But this is not specified in docs and can be changed in future.
*/
UInt64 seconds = 60 * minutes;
return roundDown(t, seconds);
Time date = find(t).date;
return date + (t - date) / divisor * divisor;
}
inline Time toStartOfSecondInterval(Time t, UInt64 seconds) const
{
if (seconds == 1)
return t;
if (seconds % 60 == 0)
return toStartOfMinuteInterval(t, seconds / 60);
return roundDown(t, seconds);
}