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/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc.

   Contributed by Andy Vaught

This file is part of the GNU Fortran 95 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, 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 "io.h"

#include "unix.h"

#include <limits.h>

typedef enum

{ CLOSE_DELETE, CLOSE_KEEP, CLOSE_UNSPECIFIED }

close_status;

static const st_option status_opt[] = {

  {"keep", CLOSE_KEEP},

  {"delete", CLOSE_DELETE},

  {NULL, 0}

};

extern void st_close (st_parameter_close *);

export_proto(st_close);

void

st_close (st_parameter_close *clp)

{

  close_status status;

  gfc_unit *u;

#if !HAVE_UNLINK_OPEN_FILE

  char * path;

  path = NULL;

#endif

  library_start (&clp->common);

  status = !(clp->common.flags & IOPARM_CLOSE_HAS_STATUS) ? CLOSE_UNSPECIFIED :

    find_option (&clp->common, clp->status, clp->status_len,

                 status_opt, "Bad STATUS parameter in CLOSE statement");

  if ((clp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK)

  {

    library_end ();

    return;

  }

  u = find_unit (clp->common.unit);

  if (u != NULL)

    {

      if (u->flags.status == STATUS_SCRATCH)

        {

          if (status == CLOSE_KEEP)

            generate_error (&clp->common, LIBERROR_BAD_OPTION,

                            "Can't KEEP a scratch file on CLOSE");

#if !HAVE_UNLINK_OPEN_FILE

          path = (char *) gfc_alloca (u->file_len + 1);

          unpack_filename (path, u->file, u->file_len);

#endif

        }

      else

        {

          if (status == CLOSE_DELETE)

            {

#if HAVE_UNLINK_OPEN_FILE

              delete_file (u);

#else

              path = (char *) gfc_alloca (u->file_len + 1);

              unpack_filename (path, u->file, u->file_len);

#endif

            }

        }

      close_unit (u);

#if !HAVE_UNLINK_OPEN_FILE

      if (path != NULL)

        unlink (path);

#endif

    }

  /* CLOSE on unconnected unit is legal and a no-op: F95 std., 9.3.5. */

  library_end ();

}