1 files changed, 49 insertions, 0 deletions
diff --git a/lib/time-internal.h b/lib/time-internal.h
new file mode 100644
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--- /dev/null
+++ b/lib/time-internal.h
@@ -0,0 +1,49 @@
+/* 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];
+};