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[BZ #1140]
2007-10-14 Ulrich Drepper <drepper@redhat.com> [BZ #1140] * time/tzfile.c (__tzfile_compute): Compute tzname[] values based on the specified time and not the last entries in the file. Move code to determine tzname[] to... (find_transition): ...here. Add ugly guess for times before the first transition.
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@ -1,3 +1,12 @@
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2007-10-14 Ulrich Drepper <drepper@redhat.com>
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[BZ #1140]
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* time/tzfile.c (__tzfile_compute): Compute tzname[] values based
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on the specified time and not the last entries in the file. Move
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code to determine tzname[] to...
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(find_transition): ...here. Add ugly guess for times before the
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first transition.
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2007-10-13 Ulrich Drepper <drepper@redhat.com>
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[BZ #3195]
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@ -1,4 +1,4 @@
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/* Copyright (C) 1991-1993,1995-2001,2003,2004,2006
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/* Copyright (C) 1991-1993,1995-2001,2003,2004,2006, 2007
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -50,7 +50,6 @@ struct leap
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long int change; /* Seconds of correction to apply. */
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};
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static struct ttinfo *find_transition (time_t timer) internal_function;
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static void compute_tzname_max (size_t) internal_function;
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static size_t num_transitions;
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@ -537,6 +536,9 @@ find_transition (time_t timer)
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{
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size_t i;
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__tzname[0] = NULL;
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__tzname[1] = NULL;
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if (num_transitions == 0 || timer < transitions[0])
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{
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/* TIMER is before any transition (or there are no transitions).
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@ -544,12 +546,34 @@ find_transition (time_t timer)
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(or the first if they're all DST types). */
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i = 0;
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while (i < num_types && types[i].isdst)
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++i;
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{
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if (__tzname[1] == NULL)
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__tzname[1] = __tzstring (&zone_names[types[i].idx]);
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++i;
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}
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if (i == num_types)
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i = 0;
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__tzname[0] = __tzstring (&zone_names[types[i].idx]);
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if (__tzname[1] == NULL)
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{
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size_t j = i;
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while (j < num_types)
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if (types[j].isdst)
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{
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__tzname[1] = __tzstring (&zone_names[types[j].idx]);
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break;
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}
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else
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++j;
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}
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}
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else if (timer >= transitions[num_transitions - 1])
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i = type_idxs[num_transitions - 1];
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{
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i = num_transitions - 1;
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goto found;
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}
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else
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{
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/* Find the first transition after TIMER, and
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@ -602,6 +626,26 @@ find_transition (time_t timer)
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found:
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/* assert (timer >= transitions[i - 1] && timer < transitions[i]); */
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__tzname[types[type_idxs[i - 1]].isdst]
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= __tzstring (&zone_names[types[type_idxs[i - 1]].idx]);
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size_t j = i;
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while (j < num_transitions)
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{
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int type = type_idxs[j];
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int dst = types[type].isdst;
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int idx = types[type].idx;
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if (__tzname[dst] == NULL)
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{
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__tzname[dst] = __tzstring (&zone_names[idx]);
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if (__tzname[1 - dst] != NULL)
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break;
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}
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++j;
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}
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i = type_idxs[i - 1];
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}
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@ -620,22 +664,7 @@ __tzfile_compute (time_t timer, int use_localtime,
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struct ttinfo *info = find_transition (timer);
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__daylight = rule_stdoff != rule_dstoff;
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__timezone = -rule_stdoff;
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__tzname[0] = NULL;
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__tzname[1] = NULL;
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for (i = num_transitions; i > 0; )
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{
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int type = type_idxs[--i];
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int dst = types[type].isdst;
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int idx = types[type].idx;
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if (__tzname[dst] == NULL)
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{
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__tzname[dst] = __tzstring (&zone_names[idx]);
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if (__tzname[1 - dst] != NULL)
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break;
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}
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}
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if (__tzname[0] == NULL)
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{
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/* This should only happen if there are no transition rules.
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@ -647,7 +676,8 @@ __tzfile_compute (time_t timer, int use_localtime,
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/* There is no daylight saving time. */
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__tzname[1] = __tzname[0];
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tp->tm_isdst = info->isdst;
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tp->tm_zone = __tzstring (&zone_names[info->idx]);
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assert (strcmp (&zone_names[info->idx], __tzname[tp->tm_isdst]) == 0);
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tp->tm_zone = __tzname[tp->tm_isdst];
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tp->tm_gmtoff = info->offset;
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}
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