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 #include "f2c.h"
  35
  36 #ifdef KR_headers
  37 VOID s_copy ();
  38 #else
  39 void s_copy(register char *a, register char *b, ftnlen la, ftnlen lb);
  40 #endif
  41
  42 int G77_date_and_time_0 (char *date, char *fftime, char *zone,
  43                          integer *values, ftnlen date_len,
  44                          ftnlen fftime_len, ftnlen zone_len)
  45 {
  46   time_t lt=time(&lt);
  47   struct tm ltime = *localtime(&lt), gtime = *gmtime(&lt);
  48   char dat[9], zon[6], ftim[11];
  49   int i, vals[8];
  50
  51   vals[0] = 1900 + ltime.tm_year;
  52   vals[1] = 1 + ltime.tm_mon;
  53   vals[2] = ltime.tm_mday;
  54   /* fixme: year boundaries */
  55   vals[3] = (ltime.tm_min - gtime.tm_min +
  56              60*(ltime.tm_hour - gtime.tm_hour +
  57                  24*(ltime.tm_yday -gtime.tm_yday)));
  58   vals[4] = ltime.tm_hour;
  59   vals[5] = ltime.tm_min;
  60   vals[6] = ltime.tm_sec;
  61   vals[7] = 0;                  /* no STDC/POSIX way to get this */
  62   /* GNUish way; maybe use `ftime' on other systems. */
  63 #if HAVE_GETTIMEOFDAY
  64   {
  65     struct timeval tp;
  66 #  if GETTIMEOFDAY_ONE_ARGUMENT
  67     if (! gettimeofday (&tp))
  68 #  else
  69 #    if HAVE_STRUCT_TIMEZONE
  70     struct timezone tzp;
  71     /* Some systems such as HPUX, do have struct timezone, but
  72        gettimeofday takes void* as the 2nd arg.  However, the effect
  73        of passing anything other than a null pointer is unspecified on
  74        HPUX.  Configure checks if gettimeofday actually fails with a
  75        non-NULL arg and pretends that struct timezone is missing if it
  76        does fail.  */
  77     if (! gettimeofday (&tp, &tzp))
  78 #    else
  79     if (! gettimeofday (&tp, (void *) 0))
  80 #    endif /* HAVE_STRUCT_TIMEZONE */
  81 #  endif /* GETTIMEOFDAY_ONE_ARGUMENT */
  82       vals[7] = tp.tv_usec/1000;
  83   }
  84 #endif /* HAVE_GETTIMEOFDAY */
  85   if (values)                   /* null pointer for missing optional */
  86     for (i=0; i<=7; i++)
  87       values[i] = vals[i];
  88   sprintf (dat, "%04d%02d%02d", vals[0], vals[1], vals[2]);
  89   s_copy(date, dat, date_len, 8);
  90   if (zone) {
  91     sprintf(zon, "%+03d%02d", vals[3] / 60, abs(vals[3] % 60));
  92     s_copy(zone, zon, zone_len, 5);
  93   }
  94   if (fftime) {
  95     sprintf (ftim, "%02d%02d%02d.%03d", vals[4], vals[5], vals[6], vals[7]);
  96     s_copy(fftime, ftim, fftime_len, 10);
  97   }
  98   return 0;
  99 }