lib/strftime.h

   1 /* declarations for strftime.c
   2
   3    Copyright (C) 2002, 2004, 2008-2020 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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 General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <time.h>
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 /* Just like strftime, but with two more arguments:
  25    POSIX requires that strftime use the local timezone information.
  26    Use the timezone __TZ instead.  Use __NS as the number of
  27    nanoseconds in the %N directive.
  28
  29    On error, set errno and return 0.  Otherwise, return the number of
  30    bytes generated (not counting the trailing NUL), preserving errno
  31    if the number is 0.  This errno behavior is in draft POSIX 202x
  32    plus some requested changes to POSIX.  */
  33 size_t nstrftime (char *restrict, size_t, char const *, struct tm const *,
  34                   timezone_t __tz, int __ns);
  35
  36 #ifdef __cplusplus
  37 }
  38 #endif