gcc/libgfortran/io/inquire.c

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/* 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 ();
}