1 /* Time internal interface 2 3 Copyright 2015-2021 Free Software Foundation, Inc. 4 5 This file is free software: you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 3 of the 8 License, or (at your option) any later version. 9 10 This file is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 17 18 /* Written by Paul Eggert. */ 19 20 /* A time zone rule. */ 21 struct tm_zone 22 { 23 /* More abbreviations, should they be needed. Their TZ_IS_SET 24 members are zero. */ 25 struct tm_zone *next; 26 27 #if HAVE_TZNAME && !HAVE_STRUCT_TM_TM_ZONE 28 /* Copies of recent strings taken from tzname[0] and tzname[1]. 29 The copies are in ABBRS, so that they survive tzset. Null if unknown. */ 30 char *tzname_copy[2]; 31 #endif 32 33 /* If nonzero, the rule represents the TZ environment variable set 34 to the first "abbreviation" (this may be the empty string). 35 Otherwise, it represents an unset TZ. */ 36 char tz_is_set; 37 38 /* A sequence of null-terminated strings packed next to each other. 39 The strings are followed by an extra null byte. If TZ_IS_SET, 40 there must be at least one string and the first string (which is 41 actually a TZ environment value) may be empty. Otherwise all 42 strings must be nonempty. 43 44 Abbreviations are stored here because otherwise the values of 45 tm_zone and/or tzname would be dead after changing TZ and calling 46 tzset. Abbreviations never move once allocated, and are live 47 until tzfree is called. */ 48 char abbrs[FLEXIBLE_ARRAY_MEMBER]; 49 };