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/* Copyright (C) 2002, 2003, 2005 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 2, or (at your option)

any later version.

In addition to the permissions in the GNU General Public License, the

Free Software Foundation gives you unlimited permission to link the

compiled version of this file into combinations with other programs,

and to distribute those combinations without any restriction coming

from the use of this file.  (The General Public License restrictions

do apply in other respects; for example, they cover modification of

the file, and distribution when not linked into a combine

executable.)

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.

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

along with Libgfortran; see the file COPYING.  If not, write to

the Free Software Foundation, 51 Franklin Street, Fifth Floor,

Boston, MA 02110-1301, USA.  */

#include "config.h"

#include "libgfortran.h"

#include "io.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, ERROR_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

    }

  library_end ();

}