Re: CVS commit: src/lib/libc/time

[Jan Schaumann <jschauma%netmeister.org@localhost>]

Robert Elz <kre%munnari.OZ.AU@localhost> wrote:
>     Date:        Sun, 23 Oct 2022 13:53:01 -0400
>     From:        Jan Schaumann <jschauma%netmeister.org@localhost>
>     Message-ID:  <Y1V/fYAEKv9d9i/g%netmeister.org@localhost>
> 
>   | Hmm, maybe something like this?
> 
> I think there is still too much there, you don't have
> to explain everything (or almost anything), but it is
> in the right direction I think.

New proposal:

---

[...] components are not restricted to their normal
ranges and will be normalized, if need be.

For example, consider a struct tm initialized with a
tm_year = 122, tm_mon = 10, tm_mday = 30, tm_hour =
22, tm_min = 57, and a tm_sec = 0.  Incrementing
tm_min by 13 and calling mktime() would lead to a
tm_hour = 23 and tm_min = 10.

This normalizing can lead to cascading changes: Again
using a struct tm initialized as in the above example
but with a tm_hour = 23, the same change would lead to
a tm_mon = 11, tm_mday = 1, tm_hour = 0, and tm_min =
10.

Negative values may also be normalized with similar
cascading effect such that e.g., a tm_hour of −1 means
1 hour before mid‐ night on the previous day and so
on.

---

?

-Jan