libf2c/libU77/datetime_.c

   1 /* Copyright (C) 1997, 1998, 1999, 2001 Free Software Foundation, Inc.
   2 This file is part of GNU Fortran libU77 library.
   3
   4 This library is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU Library General Public License as published
   6 by the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 GNU Fortran is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with GNU Fortran; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22 #include <stdio.h>
  23 #include <sys/types.h>
  24 #if TIME_WITH_SYS_TIME
  25 # include <sys/time.h>
  26 # include <time.h>
  27 #else
  28 # if HAVE_SYS_TIME_H
  29 #  include <sys/time.h>
  30 # else
  31 #  include <time.h>
  32 # endif
  33 #endif
  34 #if defined (_WIN32)
  35 #include <windows.h>
  36 #undef min
  37 #undef max
  38 #endif
  39 #include "f2c.h"
  40
  41 void s_copy (register char *a, register char *b, ftnlen la, ftnlen lb);
  42
  43 int
  44 G77_date_and_time_0 (char *date, char *fftime, char *zone,
  45                      integer * values, ftnlen date_len,
  46                      ftnlen fftime_len, ftnlen zone_len)
  47 {
  48   time_t lt = time (&lt);
  49   struct tm ltime = *localtime (&lt), gtime = *gmtime (&lt);
  50   char dat[9], zon[6], ftim[11];
  51   int i, vals[8];
  52 #if defined (_WIN32)
  53     struct _SYSTEMTIME wdattim;
  54     GetLocalTime(&wdattim);
  55     vals[7] = wdattim.wMilliseconds;
  56 #else
  57   vals[7] = 0;                  /* no STDC/POSIX way to get this */
  58   /* GNUish way; maybe use `ftime' on other systems. */
  59 #endif
  60
  61   vals[0] = 1900 + ltime.tm_year;
  62   vals[1] = 1 + ltime.tm_mon;
  63   vals[2] = ltime.tm_mday;
  64   /* fixme: year boundaries */
  65   vals[3] = (ltime.tm_min - gtime.tm_min +
  66              60 * (ltime.tm_hour - gtime.tm_hour +
  67                    24 * (ltime.tm_yday - gtime.tm_yday)));
  68   vals[4] = ltime.tm_hour;
  69   vals[5] = ltime.tm_min;
  70   vals[6] = ltime.tm_sec;
  71 #if HAVE_GETTIMEOFDAY
  72   {
  73     struct timeval tp;
  74 #  if GETTIMEOFDAY_ONE_ARGUMENT
  75     if (!gettimeofday (&tp))
  76 #  else
  77 #    if HAVE_STRUCT_TIMEZONE
  78     struct timezone tzp;
  79     /* Some systems such as HPUX, do have struct timezone, but
  80        gettimeofday takes void* as the 2nd arg.  However, the effect
  81        of passing anything other than a null pointer is unspecified on
  82        HPUX.  Configure checks if gettimeofday actually fails with a
  83        non-NULL arg and pretends that struct timezone is missing if it
  84        does fail.  */
  85     if (!gettimeofday (&tp, &tzp))
  86 #    else
  87     if (!gettimeofday (&tp, (void *) 0))
  88 #    endif /* HAVE_STRUCT_TIMEZONE */
  89 #  endif /* GETTIMEOFDAY_ONE_ARGUMENT */
  90       vals[7] = tp.tv_usec / 1000;
  91   }
  92 #endif /* HAVE_GETTIMEOFDAY */
  93   if (values)                   /* null pointer for missing optional */
  94     for (i = 0; i <= 7; i++)
  95       values[i] = vals[i];
  96   sprintf (dat, "%04d%02d%02d", vals[0], vals[1], vals[2]);
  97   s_copy (date, dat, date_len, 8);
  98   if (zone)
  99     {
 100       sprintf (zon, "%+03d%02d", vals[3] / 60, abs (vals[3] % 60));
 101       s_copy (zone, zon, zone_len, 5);
 102     }
 103   if (fftime)
 104     {
 105       sprintf (ftim, "%02d%02d%02d.%03d", vals[4], vals[5], vals[6], vals[7]);
 106       s_copy (fftime, ftim, fftime_len, 10);
 107     }
 108   return 0;
 109 }