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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. */
#include "config.h"
#include "libgfortran.h"
#include "io.h"
/* rewind.c-- Implement the rewind statement */
void
st_rewind (void)
{
unit_t *u;
library_start ();
u = find_unit (ioparm.unit);
if (u != NULL)
{
if (u->flags.access != ACCESS_SEQUENTIAL)
generate_error (ERROR_BAD_OPTION,
"Cannot REWIND a file opened for DIRECT access");
else
{
if (g.mode==WRITING)
struncate(u->s);
u->last_record = 0;
if (sseek (u->s, 0) == FAILURE)
generate_error (ERROR_OS, NULL);
u->endfile = NO_ENDFILE;
u->current_record = 0;
test_endfile (u);
}
}
library_end ();
}
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