inquire.c   [plain text]

/* Copyright (C) 2002-2003 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.

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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


/* Implement the non-IOLENGTH variant of the INQUIRY statement */

#include "config.h"
#include "libgfortran.h"
#include "io.h"


static char undefined[] = "UNDEFINED";


/* inquire_via_unit()-- Inquiry via unit number.  The unit might not exist. */

static void
inquire_via_unit (gfc_unit * u)
{
  const char *p;

  if (ioparm.exist != NULL)
    *ioparm.exist = (u != NULL);

  if (ioparm.opened != NULL)
    *ioparm.opened = (u != NULL);

  if (ioparm.number != NULL)
    *ioparm.number = (u != NULL) ? u->unit_number : -1;

  if (ioparm.named != NULL)
    *ioparm.named = (u != NULL && u->flags.status != STATUS_SCRATCH);

  if (ioparm.name != NULL && u != NULL && u->flags.status != STATUS_SCRATCH)
    fstrcpy (ioparm.name, ioparm.name_len, u->file, u->file_len);

  if (ioparm.access != NULL)
    {
      if (u == NULL)
	p = undefined;
      else
	switch (u->flags.access)
	  {
	  case ACCESS_SEQUENTIAL:
	    p = "SEQUENTIAL";
	    break;
	  case ACCESS_DIRECT:
	    p = "DIRECT";
	    break;
	  default:
	    internal_error ("inquire_via_unit(): Bad access");
	  }

      cf_strcpy (ioparm.access, ioparm.access_len, p);
    }

  if (ioparm.sequential != NULL)
    {
      p = (u == NULL) ? inquire_sequential (NULL, 0) :
	inquire_sequential (u->file, u->file_len);

      cf_strcpy (ioparm.sequential, ioparm.sequential_len, p);
    }

  if (ioparm.direct != NULL)
    {
      p = (u == NULL) ? inquire_direct (NULL, 0) :
	inquire_direct (u->file, u->file_len);

      cf_strcpy (ioparm.direct, ioparm.direct_len, p);
    }

  if (ioparm.form != NULL)
    {
      if (u == NULL)
	p = undefined;
      else
	switch (u->flags.form)
	  {
	  case FORM_FORMATTED:
	    p = "FORMATTED";
	    break;
	  case FORM_UNFORMATTED:
	    p = "UNFORMATTED";
	    break;
	  default:
	    internal_error ("inquire_via_unit(): Bad form");
	  }

      cf_strcpy (ioparm.form, ioparm.form_len, p);
    }

  if (ioparm.formatted != NULL)
    {
      p = (u == NULL) ? inquire_formatted (NULL, 0) :
	inquire_formatted (u->file, u->file_len);

      cf_strcpy (ioparm.formatted, ioparm.formatted_len, p);
    }

  if (ioparm.unformatted != NULL)
    {
      p = (u == NULL) ? inquire_unformatted (NULL, 0) :
	inquire_unformatted (u->file, u->file_len);

      cf_strcpy (ioparm.unformatted, ioparm.unformatted_len, p);
    }

  if (ioparm.recl_out != NULL)
    *ioparm.recl_out = (u != NULL) ? u->recl : 0;

  if (ioparm.nextrec != NULL)
    *ioparm.nextrec = (u != NULL) ? u->last_record + 1 : 0;

  if (ioparm.blank != NULL)
    {
      if (u == NULL)
	p = undefined;
      else
	switch (u->flags.blank)
	  {
	  case BLANK_NULL:
          p = "NULL";
	    break;
	  case BLANK_ZERO:
	    p = "ZERO";
	    break;
	  default:
	    internal_error ("inquire_via_unit(): Bad blank");
	  }

      cf_strcpy (ioparm.blank, ioparm.blank_len, p);
    }

  if (ioparm.position != NULL)
    {
      if (u == NULL || u->flags.access == ACCESS_DIRECT)
	p = undefined;
      else
	{
	  p = NULL;		/* TODO: Try to decode what the standard says... */
	}

      cf_strcpy (ioparm.blank, ioparm.blank_len, p);
    }

  if (ioparm.action != NULL)
    {
      if (u == NULL)
	p = undefined;
      else
	switch (u->flags.action)
	  {
	  case ACTION_READ:
	    p = "READ";
	    break;
	  case ACTION_WRITE:
	    p = "WRITE";
	    break;
	  case ACTION_READWRITE:
	    p = "READWRITE";
	    break;
	  default:
	    internal_error ("inquire_via_unit(): Bad action");
	  }

      cf_strcpy (ioparm.action, ioparm.action_len, p);
    }

  if (ioparm.read != NULL)
    {
      p = (u == NULL) ? inquire_read (NULL, 0) :
	inquire_read (u->file, u->file_len);

      cf_strcpy (ioparm.read, ioparm.read_len, p);
    }

  if (ioparm.write != NULL)
    {
      p = (u == NULL) ? inquire_write (NULL, 0) :
	inquire_write (u->file, u->file_len);

      cf_strcpy (ioparm.write, ioparm.write_len, p);
    }

  if (ioparm.readwrite != NULL)
    {
      p = (u == NULL) ? inquire_readwrite (NULL, 0) :
	inquire_readwrite (u->file, u->file_len);

      cf_strcpy (ioparm.readwrite, ioparm.readwrite_len, p);
    }

  if (ioparm.delim != NULL)
    {
      if (u == NULL || u->flags.form != FORM_FORMATTED)
	p = undefined;
      else
	switch (u->flags.delim)
	  {
	  case DELIM_NONE:
	    p = "NONE";
	    break;
	  case DELIM_QUOTE:
	    p = "QUOTE";
	    break;
	  case DELIM_APOSTROPHE:
	    p = "APOSTROPHE";
	    break;
	  default:
	    internal_error ("inquire_via_unit(): Bad delim");
	  }

      cf_strcpy (ioparm.access, ioparm.access_len, p);
    }

  if (ioparm.pad != NULL)
    {
      if (u == NULL || u->flags.form != FORM_FORMATTED)
	p = undefined;
      else
	switch (u->flags.pad)
	  {
	  case PAD_NO:
	    p = "NO";
	    break;
	  case PAD_YES:
	    p = "YES";
	    break;
	  default:
	    internal_error ("inquire_via_unit(): Bad pad");
	  }

      cf_strcpy (ioparm.pad, ioparm.pad_len, p);
    }
}


/* inquire_via_filename()-- Inquiry via filename.  This subroutine is
 * only used if the filename is *not* connected to a unit number. */

static void
inquire_via_filename (void)
{
  const char *p;

  if (ioparm.exist != NULL)
    *ioparm.exist = file_exists ();

  if (ioparm.opened != NULL)
    *ioparm.opened = 0;

  if (ioparm.number != NULL)
    *ioparm.number = -1;

  if (ioparm.named != NULL)
    *ioparm.named = 1;

  if (ioparm.name != NULL)
    fstrcpy (ioparm.name, ioparm.name_len, ioparm.file, ioparm.file_len);

  if (ioparm.access != NULL)
    cf_strcpy (ioparm.access, ioparm.access_len, undefined);

  if (ioparm.sequential != NULL)
    {
      p = inquire_sequential (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.sequential, ioparm.sequential_len, p);
    }

  if (ioparm.direct != NULL)
    {
      p = inquire_direct (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.direct, ioparm.direct_len, p);
    }

  if (ioparm.form != NULL)
    cf_strcpy (ioparm.form, ioparm.form_len, undefined);

  if (ioparm.formatted != NULL)
    {
      p = inquire_formatted (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.formatted, ioparm.formatted_len, p);
    }

  if (ioparm.unformatted != NULL)
    {
      p = inquire_unformatted (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.unformatted, ioparm.unformatted_len, p);
    }

  if (ioparm.recl_out != NULL)
    *ioparm.recl_out = 0;

  if (ioparm.nextrec != NULL)
    *ioparm.nextrec = 0;

  if (ioparm.blank != NULL)
    cf_strcpy (ioparm.blank, ioparm.blank_len, undefined);

  if (ioparm.position != NULL)
    cf_strcpy (ioparm.position, ioparm.position_len, undefined);

  if (ioparm.access != NULL)
    cf_strcpy (ioparm.access, ioparm.access_len, undefined);

  if (ioparm.read != NULL)
    {
      p = inquire_read (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.read, ioparm.read_len, p);
    }

  if (ioparm.write != NULL)
    {
      p = inquire_write (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.write, ioparm.write_len, p);
    }

  if (ioparm.readwrite != NULL)
    {
      p = inquire_read (ioparm.file, ioparm.file_len);
      cf_strcpy (ioparm.readwrite, ioparm.readwrite_len, p);
    }

  if (ioparm.delim != NULL)
    cf_strcpy (ioparm.delim, ioparm.delim_len, undefined);

  if (ioparm.pad != NULL)
    cf_strcpy (ioparm.pad, ioparm.pad_len, undefined);

}


/* Library entry point for the INQUIRE statement (non-IOLENGTH
   form).  */

void
st_inquire (void)
{
  gfc_unit *u;

  library_start ();

  if (ioparm.file == NULL)
    inquire_via_unit (find_unit (ioparm.unit));
  else
    {
      u = find_file ();
      if (u == NULL)
	inquire_via_filename ();
      else
	inquire_via_unit (u);
    }

  library_end ();
}