[Bug 656] Changed - aol update fails, time conversion possibly broken
wine-bugs at winehq.com
wine-bugs at winehq.com
Thu May 9 16:30:38 CDT 2002
http://bugs.winehq.com/show_bug.cgi?id=656
*** shadow/656 Tue May 7 17:10:18 2002
--- shadow/656.tmp.24609 Thu May 9 16:30:38 2002
***************
*** 41,43 ****
--- 41,72 ----
080e42d8:Ret kernel32.GlobalAlloc() retval=4037c4a6 ret=0040239b
Which means that one of those *Time*To*Time* functions are broken.
+
+ ------- Additional Comments From vberon at mecano.gme.usherb.ca 2002-05-09 16:30 -------
+ FileTimeToLocalFileTime takes a FILETIME (which is UTC) and converts it into
+ another FILETIME, this time in the current TZ.
+
+ FileTimeToSystemTime seems OK: both the input and the output are supposed to be
+ UTC, so no TZ conversion going on.
+
+ Now, the program takes a UTC time (from GetFileTime), transfers it to local (via
+ FileTimeToLocalFileTime), then takes that local time (at least the pointer
+ address seems to indicate that) and transforms it into a SYSTEMTIME (which is
+ supposed to be just another representation of a UTC time).
+
+ The problem seems to lie in the call to FileTimeToSystemTime: the program sends
+ an "illegal" time (local time) rather than a real file time (which is UTC).
+
+ I'll have to play a bit on a real Windows computer to try some stuff, and verify
+ what those 2 functions actually do on Windows.
+
+ I assume you're in CDT (-500 from UTC), which explains the 0500 difference in
+ the strings. Could you try again with a +0000 TZ? It might help to further
+ target the culprit...
+
+ Are there other calls you could try to trace, like the pointers from which the 2
+ strings are made of? It might help knowing what is the code path leading to one
+ and the other strings. Right now, my guess is that the first one (164848) is
+ constructed from the local time (pointer 0x40566650), and the second one
+ (214848) from a UTC time (pointer 0x40566648). The pointer 0x40566658 is just
+ another representation of 0x40566650.
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