mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 19:51:11 +00:00
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/* Copyright (C) 1993-2013 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, see
|
|
<http://www.gnu.org/licenses/>.
|
|
|
|
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 <stdlib.h>
|
|
#include <libioP.h>
|
|
#include <errno.h>
|
|
#ifndef errno
|
|
extern int errno;
|
|
#endif
|
|
#ifndef __set_errno
|
|
# define __set_errno(Val) errno = (Val)
|
|
#endif
|
|
|
|
_IO_off64_t
|
|
_IO_seekoff_unlocked (fp, offset, dir, mode)
|
|
_IO_FILE *fp;
|
|
_IO_off64_t offset;
|
|
int dir;
|
|
int mode;
|
|
{
|
|
if (dir != _IO_seek_cur && dir != _IO_seek_set && dir != _IO_seek_end)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return EOF;
|
|
}
|
|
|
|
/* If we have a backup buffer, get rid of it, since the __seekoff
|
|
callback may not know to do the right thing about it.
|
|
This may be over-kill, but it'll do for now. TODO */
|
|
if (mode != 0 && ((_IO_fwide (fp, 0) < 0 && _IO_have_backup (fp))
|
|
|| (_IO_fwide (fp, 0) > 0 && _IO_have_wbackup (fp))))
|
|
{
|
|
if (dir == _IO_seek_cur && _IO_in_backup (fp))
|
|
{
|
|
if (_IO_vtable_offset (fp) != 0 || fp->_mode <= 0)
|
|
offset -= fp->_IO_read_end - fp->_IO_read_ptr;
|
|
else
|
|
abort ();
|
|
}
|
|
if (_IO_fwide (fp, 0) < 0)
|
|
_IO_free_backup_area (fp);
|
|
else
|
|
_IO_free_wbackup_area (fp);
|
|
}
|
|
|
|
return _IO_SEEKOFF (fp, offset, dir, mode);
|
|
}
|
|
|
|
|
|
_IO_off64_t
|
|
_IO_seekoff (fp, offset, dir, mode)
|
|
_IO_FILE *fp;
|
|
_IO_off64_t offset;
|
|
int dir;
|
|
int mode;
|
|
{
|
|
_IO_off64_t retval;
|
|
|
|
_IO_acquire_lock (fp);
|
|
retval = _IO_seekoff_unlocked (fp, offset, dir, mode);
|
|
_IO_release_lock (fp);
|
|
return retval;
|
|
}
|