time-internal.h 1.86 KB
Newer Older
Paul Eggert's avatar
Paul Eggert committed
1 2
/* Time internal interface

Paul Eggert's avatar
Paul Eggert committed
3
   Copyright 2015-2020 Free Software Foundation, Inc.
Paul Eggert's avatar
Paul Eggert committed
4 5 6 7 8 9 10 11 12 13 14 15

   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
Paul Eggert's avatar
Paul Eggert committed
16
   with this program; if not, see <https://www.gnu.org/licenses/>.  */
Paul Eggert's avatar
Paul Eggert committed
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

/* 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
Paul Eggert's avatar
Paul Eggert committed
41 42
     actually a TZ environment value) may be empty.  Otherwise all
     strings must be nonempty.
Paul Eggert's avatar
Paul Eggert committed
43 44 45 46 47 48 49

     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];
};