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/* Retrieve information about a FILE stream.
Copyright (C) 2007 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
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_ferror_unlocked /* GNU libc, BeOS */
# 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 /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
if (fp->_flags & __SLBF)
return _IOLBF;
if (fp->_flags & __SNBF)
return _IONBF;
return _IOFBF;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
# if HAVE___FLBF /* Solaris >= 7 */
if (__flbf (fp))
return _IOLBF;
# else
if (fp->_flag & _IOLBF)
return _IOLBF;
# endif
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
unsigned char *_base; \
unsigned char *_end; \
long _cnt; \
int _file; \
unsigned int _flag; \
} *) fp)
return fp_->_flag & (_IONBF | _IOFBF);
# else
if (fp->_flag & _IONBF)
return _IONBF;
return _IOFBF;
# endif
#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 & _MLBF)
return _IOLBF;
if (fp->_Mode & _MNBF)
return _IONBF;
return _IOFBF;
#else
#error "Please port gnulib fbufmode.c to your platform! Look at the setvbuf implementation."
#endif
}
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