1 /* Retrieve information about a FILE stream.
2 Copyright (C) 2007-2010 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "stdio-impl.h"
27 /* Most systems provide FILE as a struct and the necessary bitmask in
28 <stdio.h>, because they need it for implementing getc() and putc() as
30 #if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
31 return (fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) != 0;
32 #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
33 return (fp_->_flags & __SWR) != 0;
34 #elif defined __EMX__ /* emx+gcc */
35 return (fp->_flags & _IOWRT) != 0;
36 #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
37 return (fp->_flag & _IOWRT) != 0;
38 #elif defined __UCLIBC__ /* uClibc */
39 return (fp->__modeflags & __FLAG_WRITING) != 0;
40 #elif defined __QNX__ /* QNX */
41 return ((fp->_Mode & 0x1 /* _MOPENR */) == 0
42 || (fp->_Mode & 0x2000 /* _MWRITE */) != 0);
43 #elif defined __MINT__ /* Atari FreeMiNT */
44 if (!fp->__mode.__read)
46 if (!fp->__mode.__write)
48 # ifdef _IO_CURRENTLY_PUTTING /* Flag added on 2009-02-28 */
49 return (fp->__flags & _IO_CURRENTLY_PUTTING) != 0;
51 return (fp->__buffer < fp->__put_limit /*|| fp->__bufp == fp->__get_limit ??*/);
54 #error "Please port gnulib fwriting.c to your platform!"