On 4/20/21 4:57 AM, Manuela Friedrich wrote:
I still would like to double check about the zdump -v output for Africa Abidjan. I am getting 1946 lines of output. Is that in the range you get on Linux?
No, all I get is the following.
Africa/Abidjan -9223372036854775808 = NULL Africa/Abidjan -67768040609740801 = NULL Africa/Abidjan Thu Jan 1 00:00:00 -2147481748 UT = NULL Africa/Abidjan Thu Jan 1 00:16:07 -2147481748 UT = NULL Africa/Abidjan Thu Jan 1 00:16:08 -2147481748 UT = Thu Jan 1 00:00:00 -2147481748 LMT isdst=0 gmtoff=-968 Africa/Abidjan Mon Jan 1 00:16:07 1912 UT = Sun Dec 31 23:59:59 1911 LMT isdst=0 gmtoff=-968 Africa/Abidjan Mon Jan 1 00:16:08 1912 UT = Mon Jan 1 00:16:08 1912 GMT isdst=0 gmtoff=0 Africa/Abidjan Wed Dec 31 23:59:59 2147485547 UT = Wed Dec 31 23:59:59 2147485547 GMT isdst=0 gmtoff=0 Africa/Abidjan 67768036191676800 = NULL Africa/Abidjan 9223372036854775807 = NULL
So it appears that there is still some problem on MS-Windows that we haven't gotten to the bottom of. Looking at the output you sent me in earlier email (quoted below), it appears that there a problem starting at Sun Dec 31 23:59:59 1911 UT. Starting then, on your MS-Windows port for some reason zdump thinks there is a transition every second.
d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan -9223372036854775808 = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan -67768040609740801 = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:00:00 -2147481748 UT = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:07 -2147481748 UT = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:08 -2147481748 UT = Thu Jan 1 00:00:00 -2147481748 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Sun Dec 31 23:59:59 1911 UT = Sun Dec 31 23:43:51 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:00 1912 UT = Sun Dec 31 23:43:52 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:00 1912 UT = Sun Dec 31 23:43:52 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:01 1912 UT = Sun Dec 31 23:43:53 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:01 1912 UT = Sun Dec 31 23:43:53 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:02 1912 UT = Sun Dec 31 23:43:54 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:02 1912 UT = Sun Dec 31 23:43:54 1911 LMT isdst=0 gmtoff=-968 ...
My suspicion is that the following line in zdump.c (line 702) is the culprit somehow: && delta(&tm, &lotm) == t - lot That is, I suspect that delta(&tm, &lotm) is not equal to t - lot, even though it should be in the "transitions" that zdump is reporting incorrectly. Here, tm is the result of calling localtime on t and lotm is the result of calling localtime on lot, and in this incorrect "transitions" t = lot + 1. Perhaps you can investigate my guess with a debugger, or by inserting debugging printfs to see why zdump is going awry.