f2cext.c (system_clock_): Remove (just f90 intrinsic).

1998-07-05  Dave Love  <d.love@dl.ac.uk>
	* f2cext.c (system_clock_): Remove (just f90 intrinsic).
	* Makefile.in (F2CEXT): Add datetime, remove sclock.
	(UOBJ): Add libU77/datetime_.o.
	* libU77/config.h.in: Add HAVE_GETTIMEOFDAY.
	* libU77/configure.in: Check for gettimeofday.
	* libU77/datetime_.c: New file.
	* libU77/sys_clock_.c: Allow optional args.
	* libU77/Makefile.in (G77DIR): Fix for current directory
	structure.
	(SRCS, OBJS): Add datetime.

From-SVN: r20942

libf2c/libU77/datetime_.c

+/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+This file is part of GNU Fortran libU77 library.
+
+This library is free software; you can redistribute it and/or modify it
+under the terms of the GNU Library General Public License as published
+by the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GNU Fortran is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with GNU Fortran; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <stdio.h>
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+#include "f2c.h"
+
+int G77_date_and_time_0 (char *date, char *fftime, char *zone,
+			 integer *values, ftnlen date_len,
+			 ftnlen fftime_len, ftnlen zone_len)
+{
+  time_t lt=time(&lt);
+  struct tm ltime = *localtime(&lt), gtime = *gmtime(&lt);
+  char dat[9], zon[6], ftim[11];
+  int i, vals[8];
+
+  vals[0] = 1900 + ltime.tm_year;
+  vals[1] = 1 + ltime.tm_mon;
+  vals[2] = ltime.tm_mday;
+  /* fixme: year boundaries */
+  vals[3] = (ltime.tm_min - gtime.tm_min +
+	     60*(ltime.tm_hour - gtime.tm_hour +
+		 24*(ltime.tm_yday -gtime.tm_yday)));
+  vals[4] = ltime.tm_hour;
+  vals[5] = ltime.tm_min;
+  vals[6] = ltime.tm_sec;
+  vals[7] = 0;                  /* no STDC way to get this */
+  /* GNUish way; maybe use `ftime' on other systems. */
+#if HAVE_GETTIMEOFDAY
+  {
+    struct timeval tp;
+    struct timezone tzp;
+    if (! gettimeofday (&tp, &tzp))
+      vals[7] = tp.tv_usec;
+  }
+#endif
+  if (values)			/* null pointer for missing optional */
+    for (i=0; i<=7; i++)
+      values[i] = vals[i];
+  sprintf (dat, "%04d%02d%02d", vals[0], vals[1], vals[2]);
+  s_copy(date, dat, date_len, 8);
+  if (zone) {
+    sprintf(zon, "%+03d%02d", vals[3] / 60, abs(vals[3] % 60));
+    s_copy(zone, zon, zone_len, 5);
+  }
+  if (fftime) {
+    sprintf (ftim, "%02d%02d%02d.%03d", vals[4], vals[5], vals[6], vals[7]);
+    s_copy(fftime, ftim, fftime_len, 10);
+  }
+  return 0;
+}