include/timehead.h

   1 /* timehead.h - from the autoconf docs: sanely include the right time headers everywhere
   2
   3    Copyright (C) 2001   Russell Kroll <rkroll@exploits.org>
   4         2005            Arnaud Quette <arnaud.quette@free.fr>
   5         2020-2024       Jim Klimov <jimklimov+nut@gmail.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20 */
  21
  22 #ifndef NUT_TIMEHEAD_H_SEEN
  23 #define NUT_TIMEHEAD_H_SEEN 1
  24
  25 #ifdef __cplusplus
  26 /* *INDENT-OFF* */
  27 extern "C" {
  28 /* *INDENT-ON* */
  29 #endif
  30
  31 #ifdef TIME_WITH_SYS_TIME
  32 # include <sys/time.h>
  33 # include <time.h>
  34 #else
  35 # ifdef HAVE_SYS_TIME_H
  36 #  include <sys/time.h>
  37 # else
  38 #  include <time.h>
  39 # endif
  40 #endif
  41
  42 #ifndef HAVE_STRPTIME
  43 /* Use fallback implementation provided in e.g. libcommon(client).la: */
  44 char * strptime(const char *buf, const char *fmt, struct tm *tm);
  45 #endif
  46
  47 #if !(defined HAVE_LOCALTIME_R && HAVE_LOCALTIME_R) && !(defined HAVE_DECL_LOCALTIME_R && HAVE_DECL_LOCALTIME_R)
  48 # if (defined HAVE_LOCALTIME_S && HAVE_LOCALTIME_S) || (defined HAVE_DECL_LOCALTIME_S && HAVE_DECL_LOCALTIME_S)
  49 /* A bit of a silly trick, but should help on MSYS2 builds it seems
  50  *  errno_t localtime_s(struct tm *_Tm, const time_t *_Time)
  51  */
  52 #  define localtime_r(timer, buf) (localtime_s(buf, timer) ? NULL : buf)
  53 # else
  54 #  include <string.h> /* memcpy */
  55 static inline struct tm *localtime_r( const time_t *timer, struct tm *buf ) {
  56         /* Note: not thread-safe per se! */
  57         struct tm *tmp = localtime (timer);
  58         memcpy(buf, tmp, sizeof(struct tm));
  59         return buf;
  60 }
  61 # endif
  62 #endif
  63
  64 #if !(defined HAVE_GMTIME_R && HAVE_GMTIME_R) && !(defined HAVE_DECL_GMTIME_R && HAVE_DECL_GMTIME_R)
  65 # if (defined HAVE_GMTIME_S && HAVE_GMTIME_S) || (defined HAVE_DECL_GMTIME_S && HAVE_DECL_GMTIME_S)
  66 /* See comment above */
  67 #  define gmtime_r(timer, buf) (gmtime_s(buf, timer) ? NULL : buf)
  68 # else
  69 #  include <string.h> /* memcpy */
  70 static inline struct tm *gmtime_r( const time_t *timer, struct tm *buf ) {
  71         /* Note: not thread-safe per se! */
  72         struct tm *tmp = gmtime (timer);
  73         memcpy(buf, tmp, sizeof(struct tm));
  74         return buf;
  75 }
  76 # endif
  77 #endif
  78
  79 #if !(defined HAVE_TIMEGM && HAVE_TIMEGM) && !(defined HAVE_DECL_TIMEGM && HAVE_DECL_TIMEGM)
  80 # if (defined HAVE__MKGMTIME && HAVE__MKGMTIME) || (defined HAVE_DECL__MKGMTIME && HAVE_DECL__MKGMTIME)
  81 #  define timegm(tm) _mkgmtime(tm)
  82 # else
  83 #  ifdef WANT_TIMEGM_FALLBACK
  84         /* use an implementation from fallbacks in NUT codebase */
  85 #   define timegm(tm) timegm_fallback(tm)
  86 #  else
  87 #   error "No fallback implementation for timegm"
  88 #  endif
  89 # endif
  90 #endif
  91
  92 #ifdef __cplusplus
  93 /* *INDENT-OFF* */
  94 }
  95 /* *INDENT-ON* */
  96 #endif
  97
  98 #endif  /* NUT_TIMEHEAD_H_SEEN */