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Re: Observation of hysteresis in a GNU libc time conversion function
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From: |
Ihor Radchenko |
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Subject: |
Re: Observation of hysteresis in a GNU libc time conversion function |
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Date: |
Wed, 18 Jan 2023 09:54:20 +0000 |
Max Nikulin <manikulin@gmail.com> writes:
> (dt '(-90 -60 -31 -30 -29 -15 0 15 29 30 31 60 90))
This is problematic. You are putting MINUTES out of normal range.
Looking at
https://codecogs.com/library/computing/c/time.h/ctime.php?alias=mktime,
out-of-range minutes are not documented.
Also, see
https://stackoverflow.com/questions/20104531/weird-mktime-logic-with-negative-seconds
Using out-of-range time fields is not advised.
--
Ihor Radchenko // yantar92,
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