diff options
| -rw-r--r-- | ChangeLog | 35 | ||||
| -rw-r--r-- | time/mktime.c | 39 |
2 files changed, 47 insertions, 27 deletions
@@ -1,3 +1,8 @@ +1998-11-03 Ulrich Drepper <drepper@cygnus.com> + + * time/mktime.c (__mktime_internal): Handle broken down times + around the time of the DST switches more correctly. + 1998-11-02 Ulrich Drepper <drepper@cygnus.com> * elf/Makefile (libdl-routines): Add dlopenold. @@ -30,23 +35,23 @@ * sysdeps/unix/sysv/linux/i386/sysdep.h: Add .L prefix to symbols used in macro magic. -1998-11-02 Andreas Jaeger <aj@arthur.rhein-neckar.de> - - * sysdeps/unix/sysv/linux/netatalk/at.h: Include <linux/atalk.h> - before <sys/socket.h> to make sockaddr_at available to - <sys/socket.h>. +1998-11-02 Andreas Jaeger <aj@arthur.rhein-neckar.de> + + * sysdeps/unix/sysv/linux/netatalk/at.h: Include <linux/atalk.h> + before <sys/socket.h> to make sockaddr_at available to + <sys/socket.h>. * posix/glob.h: Remove __P from parameter lists of declarations. - -1998-11-02 Andreas Jaeger <aj@arthur.rhein-neckar.de> - - * time/tzset.c (tz_compute): Remove unused parameter timer. - Change caller. - -1998-11-02 Mark Kettenis <kettenis@phys.uva.nl> - - * sysdeps/generic/bits/types.h (__ipc_pid_t): New typedef. - + +1998-11-02 Andreas Jaeger <aj@arthur.rhein-neckar.de> + + * time/tzset.c (tz_compute): Remove unused parameter timer. + Change caller. + +1998-11-02 Mark Kettenis <kettenis@phys.uva.nl> + + * sysdeps/generic/bits/types.h (__ipc_pid_t): New typedef. + 1998-11-02 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/i386/setgroups.c (setgroups): Remove diff --git a/time/mktime.c b/time/mktime.c index 0fa92e0e65..6135d70bd6 100644 --- a/time/mktime.c +++ b/time/mktime.c @@ -350,29 +350,44 @@ __mktime_internal (tp, convert, offset) /* If we have a match, check whether tm.tm_isdst has the requested value, if any. */ - if (dt == 0 && 0 <= isdst && 0 <= tm.tm_isdst) + if (dt == 0 && isdst >= 0 && isdst != tm.tm_isdst) { int dst_diff = (isdst != 0) - (tm.tm_isdst != 0); if (dst_diff) { - /* Move two hours in the direction indicated by the disagreement, + /* Move three hours in the direction indicated by the disagreement, probe some more, and switch to a new time if found. The largest known fallback due to daylight savings is two hours: - once, in Newfoundland, 1988-10-30 02:00 -> 00:00. */ - time_t ot = t - 2 * 60 * 60 * dst_diff; + once, in Newfoundland, 1988-10-30 02:00 -> 00:00. + But some programs (e.g. testsuites) probe for larger differences + between DST and normal time so switch by three hours. No + normal program does this so we do not account for more than + three hours difference. */ + time_t ot = t - 3 * 60 * 60 * dst_diff; + struct tm otm; + struct tm tmptm; + + otm.tm_isdst = -1; + while (--remaining_probes != 0) { - struct tm otm; if (! (dt = ydhms_tm_diff (year, yday, hour, min, sec, - ranged_convert (convert, &ot, &otm)))) - { - t = ot; - tm = otm; - break; - } - if ((ot += dt) == t) + ranged_convert (convert, &ot, + &tmptm))) + || tmptm.tm_isdst != isdst) + break; + + otm = tmptm; + ot += dt; + if (ot == t) break; /* Avoid a redundant probe. */ } + + if (otm.tm_isdst != -1) + { + t = ot; + tm = otm; + } } } |