gcc/libgfortran/io/inquire.c
Jerry DeLisle 16d962d92c re PR libfortran/31532 (INQUIRE(...,POSITION=...) not standard conforming)
2007-04-27  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/31532
	* io/file_pos.c (st_backspace): Set flags.position for end of file
	condition and use new function update_position.
	(st_endfile): Use new function update_position.
	* io/io.h: Add prototype for new function.
	* io/inquire.c (inquire_via_unit): If not direct access, set NEXTREC
	to zero.
	* io/unit.c (update_position): New function to update position info
	used by inquire.
	* io/transfer.c (next_record): Fix typo and use new function.

From-SVN: r124252
2007-04-28 02:03:21 +00:00

450 lines
11 KiB
C

/* 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. */
/* Implement the non-IOLENGTH variant of the INQUIRY statement */
#include "config.h"
#include "libgfortran.h"
#include "io.h"
static const char undefined[] = "UNDEFINED";
/* inquire_via_unit()-- Inquiry via unit number. The unit might not exist. */
static void
inquire_via_unit (st_parameter_inquire *iqp, gfc_unit * u)
{
const char *p;
GFC_INTEGER_4 cf = iqp->common.flags;
if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
*iqp->exist = iqp->common.unit >= 0;
if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
*iqp->opened = (u != NULL);
if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
*iqp->number = (u != NULL) ? u->unit_number : -1;
if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
*iqp->named = (u != NULL && u->flags.status != STATUS_SCRATCH);
if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0
&& u != NULL && u->flags.status != STATUS_SCRATCH)
fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.access)
{
case ACCESS_SEQUENTIAL:
p = "SEQUENTIAL";
break;
case ACCESS_DIRECT:
p = "DIRECT";
break;
case ACCESS_STREAM:
p = "STREAM";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad access");
}
cf_strcpy (iqp->access, iqp->access_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
{
if (u == NULL)
p = inquire_sequential (NULL, 0);
else
{
/* disallow an open direct access file to be accessed sequentially */
if (u->flags.access == ACCESS_DIRECT)
p = "NO";
else
p = inquire_sequential (u->file, u->file_len);
}
cf_strcpy (iqp->sequential, iqp->sequential_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
{
p = (u == NULL) ? inquire_direct (NULL, 0) :
inquire_direct (u->file, u->file_len);
cf_strcpy (iqp->direct, iqp->direct_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
{
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 (&iqp->common, "inquire_via_unit(): Bad form");
}
cf_strcpy (iqp->form, iqp->form_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
{
p = (u == NULL) ? inquire_formatted (NULL, 0) :
inquire_formatted (u->file, u->file_len);
cf_strcpy (iqp->formatted, iqp->formatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
{
p = (u == NULL) ? inquire_unformatted (NULL, 0) :
inquire_unformatted (u->file, u->file_len);
cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
*iqp->recl_out = (u != NULL) ? u->recl : 0;
if ((cf & IOPARM_INQUIRE_HAS_STRM_POS_OUT) != 0)
*iqp->strm_pos_out = (u != NULL) ? u->strm_pos : 0;
if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
{
/* This only makes sense in the context of DIRECT access. */
if (u != NULL && u->flags.access == ACCESS_DIRECT)
*iqp->nextrec = u->last_record + 1;
else
*iqp->nextrec = 0;
}
if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
{
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 (&iqp->common, "inquire_via_unit(): Bad blank");
}
cf_strcpy (iqp->blank, iqp->blank_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
{
if (u == NULL || u->flags.access == ACCESS_DIRECT)
p = undefined;
else
switch (u->flags.position)
{
case POSITION_REWIND:
p = "REWIND";
break;
case POSITION_APPEND:
p = "APPEND";
break;
case POSITION_ASIS:
p = "ASIS";
break;
default:
/* if not direct access, it must be
either REWIND, APPEND, or ASIS.
ASIS seems to be the best default */
p = "ASIS";
break;
}
cf_strcpy (iqp->position, iqp->position_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_ACTION) != 0)
{
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 (&iqp->common, "inquire_via_unit(): Bad action");
}
cf_strcpy (iqp->action, iqp->action_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
{
p = (u == NULL) ? inquire_read (NULL, 0) :
inquire_read (u->file, u->file_len);
cf_strcpy (iqp->read, iqp->read_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
{
p = (u == NULL) ? inquire_write (NULL, 0) :
inquire_write (u->file, u->file_len);
cf_strcpy (iqp->write, iqp->write_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
{
p = (u == NULL) ? inquire_readwrite (NULL, 0) :
inquire_readwrite (u->file, u->file_len);
cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
{
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 (&iqp->common, "inquire_via_unit(): Bad delim");
}
cf_strcpy (iqp->delim, iqp->delim_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
{
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 (&iqp->common, "inquire_via_unit(): Bad pad");
}
cf_strcpy (iqp->pad, iqp->pad_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_CONVERT) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.convert)
{
/* l8_to_l4_offset is 0 for little-endian, 1 for big-endian. */
case CONVERT_NATIVE:
p = l8_to_l4_offset ? "BIG_ENDIAN" : "LITTLE_ENDIAN";
break;
case CONVERT_SWAP:
p = l8_to_l4_offset ? "LITTLE_ENDIAN" : "BIG_ENDIAN";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad convert");
}
cf_strcpy (iqp->convert, iqp->convert_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 (st_parameter_inquire *iqp)
{
const char *p;
GFC_INTEGER_4 cf = iqp->common.flags;
if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
*iqp->exist = file_exists (iqp->file, iqp->file_len);
if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
*iqp->opened = 0;
if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
*iqp->number = -1;
if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
*iqp->named = 1;
if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0)
fstrcpy (iqp->name, iqp->name_len, iqp->file, iqp->file_len);
if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
cf_strcpy (iqp->access, iqp->access_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
{
p = inquire_sequential (iqp->file, iqp->file_len);
cf_strcpy (iqp->sequential, iqp->sequential_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
{
p = inquire_direct (iqp->file, iqp->file_len);
cf_strcpy (iqp->direct, iqp->direct_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
cf_strcpy (iqp->form, iqp->form_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
{
p = inquire_formatted (iqp->file, iqp->file_len);
cf_strcpy (iqp->formatted, iqp->formatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
{
p = inquire_unformatted (iqp->file, iqp->file_len);
cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
*iqp->recl_out = 0;
if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
*iqp->nextrec = 0;
if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
cf_strcpy (iqp->blank, iqp->blank_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
cf_strcpy (iqp->position, iqp->position_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
cf_strcpy (iqp->access, iqp->access_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
{
p = inquire_read (iqp->file, iqp->file_len);
cf_strcpy (iqp->read, iqp->read_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
{
p = inquire_write (iqp->file, iqp->file_len);
cf_strcpy (iqp->write, iqp->write_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
{
p = inquire_read (iqp->file, iqp->file_len);
cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
cf_strcpy (iqp->delim, iqp->delim_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
cf_strcpy (iqp->pad, iqp->pad_len, undefined);
}
/* Library entry point for the INQUIRE statement (non-IOLENGTH
form). */
extern void st_inquire (st_parameter_inquire *);
export_proto(st_inquire);
void
st_inquire (st_parameter_inquire *iqp)
{
gfc_unit *u;
library_start (&iqp->common);
if ((iqp->common.flags & IOPARM_INQUIRE_HAS_FILE) == 0)
{
u = find_unit (iqp->common.unit);
inquire_via_unit (iqp, u);
}
else
{
u = find_file (iqp->file, iqp->file_len);
if (u == NULL)
inquire_via_filename (iqp);
else
inquire_via_unit (iqp, u);
}
if (u != NULL)
unlock_unit (u);
library_end ();
}