1  /* Convert `time_t' to `struct tm' in UTC.
       2     Copyright (C) 1991-2023 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     <https://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  __gmtime64_r (const __time64_t *t, struct tm *tp)
      25  {
      26    return __tz_convert (*t, 0, tp);
      27  }
      28  
      29  /* Provide a 32-bit variant if needed.  */
      30  
      31  #if __TIMESIZE != 64
      32  
      33  libc_hidden_def (__gmtime64_r)
      34  
      35  struct tm *
      36  __gmtime_r (const time_t *t, struct tm *tp)
      37  {
      38    __time64_t t64 = *t;
      39    return __gmtime64_r (&t64, tp);
      40  }
      41  
      42  #endif
      43  
      44  libc_hidden_def (__gmtime_r)
      45  weak_alias (__gmtime_r, gmtime_r)
      46  
      47  /* Return the `struct tm' representation of *T in UTC.  */
      48  struct tm *
      49  __gmtime64 (const __time64_t *t)
      50  {
      51    return __tz_convert (*t, 0, &_tmbuf);
      52  }
      53  
      54  /* Provide a 32-bit variant if needed.  */
      55  
      56  #if __TIMESIZE != 64
      57  
      58  libc_hidden_def (__gmtime64)
      59  
      60  struct tm *
      61  gmtime (const time_t *t)
      62  {
      63    __time64_t t64 = *t;
      64    return __gmtime64 (&t64);
      65  }
      66  
      67  #endif