lib/time.in.h

   1 /* A more-standard <time.h>.
   2
   3    Copyright (C) 2007-2008 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 Lesser General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 @PRAGMA_SYSTEM_HEADER@
  20
  21 /* Don't get in the way of glibc when it includes time.h merely to
  22    declare a few standard symbols, rather than to declare all the
  23    symbols.  Also, Solaris 8 <time.h> eventually includes itself
  24    recursively; if that is happening, just include the system <time.h>
  25    without adding our own declarations.  */
  26 #if (defined __need_time_t || defined __need_clock_t \
  27      || defined __need_timespec \
  28      || defined _GL_TIME_H)
  29
  30 # @INCLUDE_NEXT@ @NEXT_TIME_H@
  31
  32 #else
  33
  34 # define _GL_TIME_H
  35
  36 # @INCLUDE_NEXT@ @NEXT_TIME_H@
  37
  38 # ifdef __cplusplus
  39 extern "C" {
  40 # endif
  41
  42 /* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
  43    Or they define it with the wrong member names or define it in <sys/time.h>
  44    (e.g., FreeBSD circa 1997).  */
  45 # if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
  46 #  if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
  47 #   include <sys/time.h>
  48 #  else
  49 #   undef timespec
  50 #   define timespec rpl_timespec
  51 struct timespec
  52 {
  53   time_t tv_sec;
  54   long int tv_nsec;
  55 };
  56 #  endif
  57 # endif
  58
  59 /* Sleep for at least RQTP seconds unless interrupted,  If interrupted,
  60    return -1 and store the remaining time into RMTP.  See
  61    <http://www.opengroup.org/susv3xsh/nanosleep.html>.  */
  62 # if @REPLACE_NANOSLEEP@
  63 #  define nanosleep rpl_nanosleep
  64 int nanosleep (struct timespec const *__rqtp, struct timespec *__rmtp);
  65 # endif
  66
  67 /* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
  68    <http://www.opengroup.org/susv3xsh/localtime_r.html> and
  69    <http://www.opengroup.org/susv3xsh/gmtime_r.html>.  */
  70 # if @REPLACE_LOCALTIME_R@
  71 #  undef localtime_r
  72 #  define localtime_r rpl_localtime_r
  73 #  undef gmtime_r
  74 #  define gmtime_r rpl_gmtime_r
  75 struct tm *localtime_r (time_t const *restrict __timer,
  76                         struct tm *restrict __result);
  77 struct tm *gmtime_r (time_t const *restrict __timer,
  78                      struct tm *restrict __result);
  79 # endif
  80
  81 /* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store
  82    the resulting broken-down time into TM.  See
  83    <http://www.opengroup.org/susv3xsh/strptime.html>.  */
  84 # if @REPLACE_STRPTIME@
  85 #  undef strptime
  86 #  define strptime rpl_strptime
  87 char *strptime (char const *restrict __buf, char const *restrict __format,
  88                 struct tm *restrict __tm);
  89 # endif
  90
  91 /* Convert TM to a time_t value, assuming UTC.  */
  92 # if @REPLACE_TIMEGM@
  93 #  undef timegm
  94 #  define timegm rpl_timegm
  95 time_t timegm (struct tm *__tm);
  96 # endif
  97
  98 /* Encourage applications to avoid unsafe functions that can overrun
  99    buffers when given outlandish struct tm values.  Portable
 100    applications should use strftime (or even sprintf) instead.  */
 101 # if GNULIB_PORTCHECK
 102 #  undef asctime
 103 #  define asctime eschew_asctime
 104 #  undef asctime_r
 105 #  define asctime_r eschew_asctime_r
 106 #  undef ctime
 107 #  define ctime eschew_ctime
 108 #  undef ctime_r
 109 #  define ctime_r eschew_ctime_r
 110 # endif
 111
 112 # ifdef __cplusplus
 113 }
 114 # endif
 115
 116 #endif