OK, so we've isolated the issue to a problem with how NetBSD implements
time.mktime().
I suppose we could trap the exception in intervalgen() and, instead, return
the simple arithmetic result of adding increment. Something like:
delta = datetime.timedelta(seconds=interval)
last_stamp1 = 0
while dt1 < stop_dt:
dt2 = min(dt1 + delta, stop_dt)
stamp1 = int(time.mktime(dt1.timetuple()))
try:
stamp2 = int(time.mktime(dt2.timetuple()))
except OverflowError:
stamp2 = stamp1 + interval
if stamp2 > stamp1 > last_stamp1:
yield TimeSpan(stamp1, stamp2)
last_stamp1 = stamp1
dt1 = dt2
On Mon, Mar 9, 2020 at 5:35 PM Greg Troxel <[email protected]> wrote:
> I get
>
> Starting datetime is 2020-03-08 01:00:00
> Represented as a time tuple, this is time.struct_time(tm_year=2020,
> tm_mon=3, tm_mday=8, tm_hour=1, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=68,
> tm_isdst=-1)
> After adding an hour, the resultant datetime is 2020-03-08 02:00:00
> Represented as a timetuple this is time.struct_time(tm_year=2020,
> tm_mon=3, tm_mday=8, tm_hour=2, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=68,
> tm_isdst=-1)
> Traceback (most recent call last):
> File "./test.py", line 22, in <module>
> ts = time.mktime(tt1)
> OverflowError: mktime argument out of range
>
>
> I wrote a test program for mktime. With the isdst/gmtoff values from
> localtime, it works. With this, I can provoke EINVAL, which I think is
> per the spec.
>
> ----------------------------------------
> #include <errno.h>
> #include <stdio.h>
> #include <time.h>
>
> int
> main()
> {
> struct tm *t;
> time_t start = 1583647200; /* 20200308T0100 EST */
> time_t plus1;
>
> t = localtime(&start);
>
> printf("isdst %d tm_gmtoff %ld\n", t->tm_isdst, t->tm_gmtoff);
> t->tm_isdst = -1;
> t->tm_gmtoff = 0;
> printf("isdst %d tm_gmtoff %ld\n", t->tm_isdst, t->tm_gmtoff);
>
> t->tm_hour += 1;
> printf("tm_hour %d\n", t->tm_hour);
>
> plus1 = mktime(t);
>
> printf("plus1 %jd errno %d\n", (intmax_t) plus1, errno);
>
> printf("result: %s\n", plus1 == 1583650800 ? "ok" : "bad");
>
>
> return 0;
> }
> ----------------------------------------
> isdst 0 tm_gmtoff -18000
> isdst -1 tm_gmtoff 0
> tm_hour 2
> plus1 -1 errno 22
> result: bad
>
>
>
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