1 /* Convert UTC calendar time to simple time. Like mktime but assumes UTC. 2 3 Copyright (C) 1994-2018 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU General Public 8 License as published by the Free Software Foundation; either 9 version 3 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public 17 License along with the GNU C Library; if not, see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef _LIBC 21 # include <config.h> 22 #endif 23 24 #include <time.h> 25 26 #include "mktime-internal.h" 27 28 time_t 29 timegm (struct tm *tmp) 30 { 31 static mktime_offset_t gmtime_offset; 32 tmp->tm_isdst = 0; 33 return __mktime_internal (tmp, __gmtime_r, &gmtime_offset); 34 } 35