glibc/libio/oldiofgetpos.c
Roland McGrath 3447be7bb3 2004-11-04 Jakub Jelinek <jakub@redhat.com>
* libio/ftello.c (ftello): Don't subtract save_end - save_base
	if pos is _IO_pos_BAD.
	* libio/ftello64.c (ftello64): Likewise.
	* libio/iofgetpos.c (_IO_new_fgetpos): Likewise.
	* libio/iofgetpos64.c (_IO_new_fgetpos64): Likewise.
	* libio/oldiofgetpos.c (_IO_old_fgetpos): Likewise.
	* libio/oldiofgetpos64.c (_IO_old_fgetpos64): Likewise.
	* libio/ioftell.c (_IO_ftell): Likewise.
	Cast to long int instead of off_t when checking for overflow.
2004-11-04 23:22:02 +00:00

69 lines
2.2 KiB
C

/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
As a special exception, if you link the code in this file with
files compiled with a GNU compiler to produce an executable,
that does not cause the resulting executable to be covered by
the GNU Lesser General Public License. This exception does not
however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.
This exception applies to code released by its copyright holders
in files containing the exception. */
#include "libioP.h"
#include <errno.h>
#include <shlib-compat.h>
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
int
attribute_compat_text_section
_IO_old_fgetpos (fp, posp)
_IO_FILE *fp;
_IO_fpos_t *posp;
{
_IO_off_t pos;
CHECK_FILE (fp, EOF);
_IO_acquire_lock (fp);
pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
pos -= fp->_IO_save_end - fp->_IO_save_base;
_IO_release_lock (fp);
if (pos == _IO_pos_BAD)
{
/* ANSI explicitly requires setting errno to a positive value on
failure. */
#ifdef EIO
if (errno == 0)
__set_errno (EIO);
#endif
return EOF;
}
posp->__pos = pos;
return 0;
}
#ifdef weak_alias
compat_symbol (libc, _IO_old_fgetpos, _IO_fgetpos, GLIBC_2_0);
strong_alias (_IO_old_fgetpos, __old_fgetpos)
compat_symbol (libc, __old_fgetpos, fgetpos, GLIBC_2_0);
#endif
#endif