glibc/stdio/fgetpos.c

41 lines
1.2 KiB
C

/* Copyright (C) 1991 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <errno.h>
#include <stdio.h>
#undef fgetpos
/* Put the current position of STREAM in *POS. */
int
DEFUN(fgetpos, (stream, pos), FILE *stream AND fpos_t *pos)
{
if (!__validfp(stream) || pos == NULL)
{
errno = EINVAL;
return(-1);
}
*pos = ftell(stream);
if (*pos < 0L)
return(-1);
return(0);
}