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/* Retrieve information about a FILE stream.
Copyright (C) 2007-2010 Free Software Foundation, Inc.
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "fbufmode.h"
#if HAVE___FLBF
# include <stdio_ext.h>
#endif
#include "stdio-impl.h"
int
fbufmode (FILE *fp)
{
/* Most systems provide FILE as a struct and the necessary bitmask in
<stdio.h>, because they need it for implementing getc() and putc() as
fast macros. */
#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
# if HAVE___FLBF /* glibc >= 2.2 */
if (__flbf (fp))
return _IOLBF;
# else
if (fp->_flags & _IO_LINE_BUF)
return _IOLBF;
# endif
if (fp->_flags & _IO_UNBUFFERED)
return _IONBF;
return _IOFBF;
#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
if (fp_->_flags & __SLBF)
return _IOLBF;
if (fp_->_flags & __SNBF)
return _IONBF;
return _IOFBF;
#elif defined __EMX__ /* emx+gcc */
return fp->_flags & (_IOLBF | _IONBF | _IOFBF);
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
# if HAVE___FLBF /* Solaris >= 7 */
if (__flbf (fp))
return _IOLBF;
# else
if (fp->_flag & _IOLBF)
return _IOLBF;
# endif
if (fp_->_flag & _IONBF)
return _IONBF;
return _IOFBF;
#elif defined __UCLIBC__ /* uClibc */
if (fp->__modeflags & __FLAG_LBF)
return _IOLBF;
if (fp->__modeflags & __FLAG_NBF)
return _IONBF;
return _IOFBF;
#elif defined __QNX__ /* QNX */
if (fp->_Mode & 0x400 /* _MLBF */)
return _IOLBF;
if (fp->_Mode & 0x800 /* _MNBF */)
return _IONBF;
return _IOFBF;
#elif defined __MINT__ /* Atari FreeMiNT */
if (fp->__linebuf)
return _IOLBF;
return (fp->__bufsize > 0 ? _IOFBF : _IONBF);
#else
#error "Please port gnulib fbufmode.c to your platform! Look at the setvbuf implementation."
#endif
}
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