time/gmtime.c

   1 /* Convert `time_t' to `struct tm' in UTC.
   2    Copyright (C) 1991-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <time.h>
  20
  21 /* Return the `struct tm' representation of *T in UTC,
  22    using *TP to store the result.  */
  23 struct tm *
  24 __gmtime_r (const time_t *t, struct tm *tp)
  25 {
  26   return __tz_convert (*t, 0, tp);
  27 }
  28 libc_hidden_def (__gmtime_r)
  29 weak_alias (__gmtime_r, gmtime_r)
  30
  31 /* Return the `struct tm' representation of *T in UTC.  */
  32 struct tm *
  33 __gmtime64 (const __time64_t *t)
  34 {
  35   return __tz_convert (*t, 0, &_tmbuf);
  36 }
  37
  38 /* Provide a 32-bit variant if needed.  */
  39
  40 #if __TIMESIZE != 64
  41
  42 libc_hidden_def (__gmtime64)
  43
  44 struct tm *
  45 gmtime (const time_t *t)
  46 {
  47   __time64_t t64 = *t;
  48   return __gmtime64 (&t64);
  49 }
  50
  51 #endif