/* Retrieve information about a FILE stream.
- Copyright (C) 2007-2010 Free Software Foundation, Inc.
+ Copyright (C) 2007-2018 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
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/>. */
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#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__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)))
+ <https://sourceware.org/bugzilla/show_bug.cgi?id=4359> */
+#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_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+# 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 || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+# elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */
return (fp_->_flags & __SRD) != 0;
-#elif defined __EMX__ /* emx+gcc */
+# elif defined __EMX__ /* emx+gcc */
return (fp->_flags & _IOREAD) != 0;
-#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
- return (fp->_flag & _IOREAD) != 0;
-#elif defined __UCLIBC__ /* uClibc */
+# elif defined __minix /* Minix */
+ return (fp->_flags & _IOREADING) != 0;
+# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, MSVC, NonStop Kernel, OpenVMS */
+# if defined __sun /* Solaris */
+ return (fp_->_flag & _IOREAD) != 0 && (fp_->_flag & _IOWRT) == 0;
+# else
+ return (fp_->_flag & _IOREAD) != 0;
+# endif
+# elif defined __UCLIBC__ /* uClibc */
return (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) != 0;
-#elif defined __QNX__ /* QNX */
+# elif defined __QNX__ /* QNX */
return ((fp->_Mode & 0x2 /* _MOPENW */) == 0
|| (fp->_Mode & 0x1000 /* _MREAD */) != 0);
-#elif defined __MINT__ /* Atari FreeMiNT */
+# 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 */
+# ifdef _IO_CURRENTLY_GETTING /* Flag added on 2009-02-28 */
return (fp->__flags & _IO_CURRENTLY_GETTING) != 0;
-# else
+# 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
-#else
- #error "Please port gnulib freading.c to your platform!"
-#endif
}
#endif