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/* Time internal interface
Copyright 2015-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, see <https://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
/* A time zone rule. */
struct tm_zone
{
/* More abbreviations, should they be needed. Their TZ_IS_SET
members are zero. */
struct tm_zone *next;
#if HAVE_TZNAME && !HAVE_TM_ZONE
/* Copies of recent strings taken from tzname[0] and tzname[1].
The copies are in ABBRS, so that they survive tzset. Null if unknown. */
char *tzname_copy[2];
#endif
/* If nonzero, the rule represents the TZ environment variable set
to the first "abbreviation" (this may be the empty string).
Otherwise, it represents an unset TZ. */
char tz_is_set;
/* A sequence of null-terminated strings packed next to each other.
The strings are followed by an extra null byte. If TZ_IS_SET,
there must be at least one string and the first string (which is
actually a TZ environment value) may be empty. Otherwise all
strings must be nonempty.
Abbreviations are stored here because otherwise the values of
tm_zone and/or tzname would be dead after changing TZ and calling
tzset. Abbreviations never move once allocated, and are live
until tzfree is called. */
char abbrs[FLEXIBLE_ARRAY_MEMBER];
};
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