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/* Implementation of the ETIME intrinsic.

   Copyright (C) 2004, 2005, 2006, 2007, 2009, 2011 Free Software

   Foundation, Inc.

   Contributed by Steven G. Kargl <kargls@comcast.net>.

This file is part of the GNU Fortran runtime library (libgfortran).

Libgfortran is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public

License as published by the Free Software Foundation; either

version 3 of the License, or (at your option) any later version.

Libgfortran 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 General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

#include "libgfortran.h"

#include "time_1.h"

extern void etime_sub (gfc_array_r4 *t, GFC_REAL_4 *result);

iexport_proto(etime_sub);

void

etime_sub (gfc_array_r4 *t, GFC_REAL_4 *result)

{

  GFC_REAL_4 tu, ts, tt, *tp;

  long user_sec, user_usec, system_sec, system_usec;

  if (((GFC_DESCRIPTOR_EXTENT(t,0))) < 2)

    runtime_error ("Insufficient number of elements in TARRAY.");

  if (gf_cputime (&user_sec, &user_usec, &system_sec, &system_usec) == 0)

    {

      tu = (GFC_REAL_4)(user_sec + 1.e-6 * user_usec);

      ts = (GFC_REAL_4)(system_sec + 1.e-6 * system_usec);

      tt = tu + ts;

    }

  else

    {

      tu = (GFC_REAL_4)-1.0;

      ts = (GFC_REAL_4)-1.0;

      tt = (GFC_REAL_4)-1.0;

    }

  tp = t->data;

  *tp = tu;

  tp += GFC_DESCRIPTOR_STRIDE(t,0);

  *tp = ts;

  *result = tt;

}

iexport(etime_sub);

extern GFC_REAL_4 etime (gfc_array_r4 *t);

export_proto(etime);

GFC_REAL_4

etime (gfc_array_r4 *t)

{

  GFC_REAL_4 val;

  etime_sub (t, &val);

  return val;

}