16d962d92c
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
450 lines
11 KiB
C
450 lines
11 KiB
C
/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
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Contributed by Andy Vaught
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Libgfortran; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/* Implement the non-IOLENGTH variant of the INQUIRY statement */
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#include "config.h"
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#include "libgfortran.h"
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#include "io.h"
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static const char undefined[] = "UNDEFINED";
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/* inquire_via_unit()-- Inquiry via unit number. The unit might not exist. */
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static void
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inquire_via_unit (st_parameter_inquire *iqp, gfc_unit * u)
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{
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const char *p;
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GFC_INTEGER_4 cf = iqp->common.flags;
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if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
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*iqp->exist = iqp->common.unit >= 0;
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if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
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*iqp->opened = (u != NULL);
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if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
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*iqp->number = (u != NULL) ? u->unit_number : -1;
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if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
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*iqp->named = (u != NULL && u->flags.status != STATUS_SCRATCH);
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if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0
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&& u != NULL && u->flags.status != STATUS_SCRATCH)
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fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
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if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
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{
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if (u == NULL)
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p = undefined;
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else
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switch (u->flags.access)
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{
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case ACCESS_SEQUENTIAL:
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p = "SEQUENTIAL";
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break;
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case ACCESS_DIRECT:
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p = "DIRECT";
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break;
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case ACCESS_STREAM:
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p = "STREAM";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad access");
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}
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cf_strcpy (iqp->access, iqp->access_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
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{
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if (u == NULL)
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p = inquire_sequential (NULL, 0);
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else
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{
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/* disallow an open direct access file to be accessed sequentially */
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if (u->flags.access == ACCESS_DIRECT)
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p = "NO";
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else
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p = inquire_sequential (u->file, u->file_len);
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}
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cf_strcpy (iqp->sequential, iqp->sequential_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
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{
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p = (u == NULL) ? inquire_direct (NULL, 0) :
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inquire_direct (u->file, u->file_len);
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cf_strcpy (iqp->direct, iqp->direct_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
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{
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if (u == NULL)
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p = undefined;
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else
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switch (u->flags.form)
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{
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case FORM_FORMATTED:
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p = "FORMATTED";
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break;
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case FORM_UNFORMATTED:
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p = "UNFORMATTED";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad form");
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}
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cf_strcpy (iqp->form, iqp->form_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
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{
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p = (u == NULL) ? inquire_formatted (NULL, 0) :
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inquire_formatted (u->file, u->file_len);
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cf_strcpy (iqp->formatted, iqp->formatted_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
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{
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p = (u == NULL) ? inquire_unformatted (NULL, 0) :
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inquire_unformatted (u->file, u->file_len);
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cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
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*iqp->recl_out = (u != NULL) ? u->recl : 0;
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if ((cf & IOPARM_INQUIRE_HAS_STRM_POS_OUT) != 0)
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*iqp->strm_pos_out = (u != NULL) ? u->strm_pos : 0;
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if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
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{
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/* This only makes sense in the context of DIRECT access. */
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if (u != NULL && u->flags.access == ACCESS_DIRECT)
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*iqp->nextrec = u->last_record + 1;
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else
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*iqp->nextrec = 0;
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}
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if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
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{
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if (u == NULL)
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p = undefined;
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else
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switch (u->flags.blank)
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{
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case BLANK_NULL:
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p = "NULL";
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break;
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case BLANK_ZERO:
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p = "ZERO";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad blank");
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}
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cf_strcpy (iqp->blank, iqp->blank_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
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{
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if (u == NULL || u->flags.access == ACCESS_DIRECT)
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p = undefined;
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else
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switch (u->flags.position)
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{
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case POSITION_REWIND:
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p = "REWIND";
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break;
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case POSITION_APPEND:
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p = "APPEND";
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break;
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case POSITION_ASIS:
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p = "ASIS";
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break;
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default:
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/* if not direct access, it must be
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either REWIND, APPEND, or ASIS.
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ASIS seems to be the best default */
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p = "ASIS";
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break;
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}
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cf_strcpy (iqp->position, iqp->position_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_ACTION) != 0)
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{
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if (u == NULL)
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p = undefined;
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else
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switch (u->flags.action)
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{
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case ACTION_READ:
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p = "READ";
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break;
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case ACTION_WRITE:
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p = "WRITE";
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break;
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case ACTION_READWRITE:
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p = "READWRITE";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad action");
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}
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cf_strcpy (iqp->action, iqp->action_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
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{
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p = (u == NULL) ? inquire_read (NULL, 0) :
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inquire_read (u->file, u->file_len);
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cf_strcpy (iqp->read, iqp->read_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
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{
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p = (u == NULL) ? inquire_write (NULL, 0) :
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inquire_write (u->file, u->file_len);
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cf_strcpy (iqp->write, iqp->write_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
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{
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p = (u == NULL) ? inquire_readwrite (NULL, 0) :
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inquire_readwrite (u->file, u->file_len);
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cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
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{
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if (u == NULL || u->flags.form != FORM_FORMATTED)
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p = undefined;
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else
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switch (u->flags.delim)
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{
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case DELIM_NONE:
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p = "NONE";
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break;
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case DELIM_QUOTE:
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p = "QUOTE";
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break;
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case DELIM_APOSTROPHE:
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p = "APOSTROPHE";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad delim");
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}
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cf_strcpy (iqp->delim, iqp->delim_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
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{
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if (u == NULL || u->flags.form != FORM_FORMATTED)
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p = undefined;
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else
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switch (u->flags.pad)
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{
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case PAD_NO:
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p = "NO";
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break;
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case PAD_YES:
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p = "YES";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad pad");
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}
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cf_strcpy (iqp->pad, iqp->pad_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_CONVERT) != 0)
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{
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if (u == NULL)
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p = undefined;
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else
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switch (u->flags.convert)
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{
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/* l8_to_l4_offset is 0 for little-endian, 1 for big-endian. */
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case CONVERT_NATIVE:
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p = l8_to_l4_offset ? "BIG_ENDIAN" : "LITTLE_ENDIAN";
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break;
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case CONVERT_SWAP:
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p = l8_to_l4_offset ? "LITTLE_ENDIAN" : "BIG_ENDIAN";
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break;
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default:
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internal_error (&iqp->common, "inquire_via_unit(): Bad convert");
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}
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cf_strcpy (iqp->convert, iqp->convert_len, p);
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}
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}
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/* inquire_via_filename()-- Inquiry via filename. This subroutine is
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* only used if the filename is *not* connected to a unit number. */
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static void
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inquire_via_filename (st_parameter_inquire *iqp)
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{
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const char *p;
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GFC_INTEGER_4 cf = iqp->common.flags;
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if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
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*iqp->exist = file_exists (iqp->file, iqp->file_len);
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if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
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*iqp->opened = 0;
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if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
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*iqp->number = -1;
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if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
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*iqp->named = 1;
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if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0)
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fstrcpy (iqp->name, iqp->name_len, iqp->file, iqp->file_len);
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if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
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cf_strcpy (iqp->access, iqp->access_len, undefined);
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if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
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{
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p = inquire_sequential (iqp->file, iqp->file_len);
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cf_strcpy (iqp->sequential, iqp->sequential_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
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{
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p = inquire_direct (iqp->file, iqp->file_len);
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cf_strcpy (iqp->direct, iqp->direct_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
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cf_strcpy (iqp->form, iqp->form_len, undefined);
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if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
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{
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p = inquire_formatted (iqp->file, iqp->file_len);
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cf_strcpy (iqp->formatted, iqp->formatted_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
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{
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p = inquire_unformatted (iqp->file, iqp->file_len);
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cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
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*iqp->recl_out = 0;
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if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
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*iqp->nextrec = 0;
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if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
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cf_strcpy (iqp->blank, iqp->blank_len, undefined);
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if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
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cf_strcpy (iqp->position, iqp->position_len, undefined);
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if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
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cf_strcpy (iqp->access, iqp->access_len, undefined);
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if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
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{
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p = inquire_read (iqp->file, iqp->file_len);
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cf_strcpy (iqp->read, iqp->read_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
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{
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p = inquire_write (iqp->file, iqp->file_len);
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cf_strcpy (iqp->write, iqp->write_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
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{
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p = inquire_read (iqp->file, iqp->file_len);
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cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
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}
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if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
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cf_strcpy (iqp->delim, iqp->delim_len, undefined);
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if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
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cf_strcpy (iqp->pad, iqp->pad_len, undefined);
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}
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/* Library entry point for the INQUIRE statement (non-IOLENGTH
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form). */
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extern void st_inquire (st_parameter_inquire *);
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export_proto(st_inquire);
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void
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st_inquire (st_parameter_inquire *iqp)
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{
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gfc_unit *u;
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library_start (&iqp->common);
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if ((iqp->common.flags & IOPARM_INQUIRE_HAS_FILE) == 0)
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{
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u = find_unit (iqp->common.unit);
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inquire_via_unit (iqp, u);
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}
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else
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{
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u = find_file (iqp->file, iqp->file_len);
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if (u == NULL)
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inquire_via_filename (iqp);
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else
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inquire_via_unit (iqp, u);
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}
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if (u != NULL)
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unlock_unit (u);
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library_end ();
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}
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