diff options
author | Bruno Haible <bruno@clisp.org> | 2007-04-14 00:20:08 +0000 |
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committer | Bruno Haible <bruno@clisp.org> | 2007-04-14 00:20:08 +0000 |
commit | ea27c6baf761ef00f1f357b1dbf11782bb7deae2 (patch) | |
tree | 14572c52e37276476d4ff827ee961b7dc1ff9de4 /lib/fbufmode.c | |
parent | 384cc9551d11f74b9c642e6ca0dfc586cfafba5f (diff) | |
download | gnulib-ea27c6baf761ef00f1f357b1dbf11782bb7deae2.tar.gz |
New module 'fbufmode'.
Diffstat (limited to 'lib/fbufmode.c')
-rw-r--r-- | lib/fbufmode.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/fbufmode.c b/lib/fbufmode.c new file mode 100644 index 0000000000..3090d8f9cf --- /dev/null +++ b/lib/fbufmode.c @@ -0,0 +1,64 @@ +/* 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 2, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#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 (fp->_flag & _IONBF) + return _IONBF; + return _IOFBF; +#else + #error "Please port gnulib fbufmode.c to your platform! Look at the setvbuf implementation." +#endif +} |