/* Retrieve information about a FILE stream.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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.
+ 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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ 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 "freading.h"
-/* Don't use glibc's __freading function, see
+#include "stdio-impl.h"
+
+/* Don't use glibc's __freading function in glibc < 2.7, see
<http://sourceware.org/bugzilla/show_bug.cgi?id=4359> */
-#if !(HAVE___FREADING && !defined __GLIBC__)
+#if !(HAVE___FREADING && (!defined __GLIBC__ || defined __UCLIBC__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)))
bool
freading (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 defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
return ((fp->_flags & _IO_NO_WRITES) != 0
- || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
- && fp->_IO_read_base != NULL));
-#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
- return (fp->_flags & __SRD) != 0;
-#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
+ || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
+ && fp->_IO_read_base != NULL));
+# elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
+ return (fp_->_flags & __SRD) != 0;
+# elif defined __EMX__ /* emx+gcc */
+ return (fp->_flags & _IOREAD) != 0;
+# elif defined __minix /* Minix */
+ return (fp->_flags & _IOREADING) != 0;
+# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */
+# if defined __sun /* Solaris */
+ return (fp->_flag & _IOREAD) != 0 && (fp->_flag & _IOWRT) == 0;
+# else
return (fp->_flag & _IOREAD) != 0;
-#elif defined __UCLIBC__ /* uClibc */
+# endif
+# elif defined __UCLIBC__ /* uClibc */
return (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) != 0;
-#else
- #error "Please port gnulib freading.c to your platform!"
-#endif
+# elif defined __QNX__ /* QNX */
+ return ((fp->_Mode & 0x2 /* _MOPENW */) == 0
+ || (fp->_Mode & 0x1000 /* _MREAD */) != 0);
+# elif defined __MINT__ /* Atari FreeMiNT */
+ if (!fp->__mode.__write)
+ return 1;
+ if (!fp->__mode.__read)
+ return 0;
+# ifdef _IO_CURRENTLY_GETTING /* Flag added on 2009-02-28 */
+ return (fp->__flags & _IO_CURRENTLY_GETTING) != 0;
+# else
+ return (fp->__buffer < fp->__get_limit /*|| fp->__bufp == fp->__put_limit ??*/);
+# endif
+# elif defined EPLAN9 /* Plan9 */
+ if (fp->state == 0 /* CLOSED */ || fp->state == 4 /* WR */)
+ return 0;
+ return (fp->state == 3 /* RD */ && (fp->bufl == 0 || fp->rp < fp->wp));
+# else
+# error "Please port gnulib freading.c to your platform!"
+# endif
}
#endif