1 /* Retrieve information about a FILE stream.
2 Copyright (C) 2007 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21 #include "freadahead.h"
26 #if defined _IO_ferror_unlocked /* GNU libc, BeOS */
27 if (fp->_IO_write_ptr > fp->_IO_write_base)
29 return fp->_IO_read_end - fp->_IO_read_ptr;
30 #elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
31 if ((fp->_flags & __SWR) != 0 || fp->_r < 0)
34 #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
35 # if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
36 # define fp_ ((struct { unsigned char *_ptr; \
37 unsigned char *_base; \
38 unsigned char *_end; \
43 if ((fp_->_flag & _IOWRT) != 0)
47 if ((fp->_flag & _IOWRT) != 0)
51 #elif defined __UCLIBC__ /* uClibc */
52 # ifdef __STDIO_BUFFERS
53 if (fp->__modeflags & __FLAG_WRITING)
55 return fp->__bufread - fp->__bufpos;
59 #elif defined __QNX__ /* QNX */
60 if ((fp->_Mode & _MWRITE) != 0)
62 /* fp->_Buf <= fp->_Next <= fp->_Rend */
63 return fp->_Rend - fp->_Next;
65 #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread on your system, then report this to bug-gnulib."