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+/* Time internal interface
+
+ Copyright 2015-2016 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2, 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License along
+ with this program; if not, see <http://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 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];
+};