/* Retrieve information about a FILE stream.
- Copyright (C) 2007-2008 Free Software Foundation, Inc.
+ Copyright (C) 2007-2009 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
/* Specification. */
#include "freadahead.h"
+#include <stdlib.h>
#include "stdio-impl.h"
size_t
freadahead (FILE *fp)
{
-#if defined _IO_ferror_unlocked || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Linux libc5 */
+#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
if (fp->_IO_write_ptr > fp->_IO_write_base)
return 0;
return (fp->_IO_read_end - fp->_IO_read_ptr)
+ (fp->_flags & _IO_IN_BACKUP ? fp->_IO_save_end - fp->_IO_save_base :
0);
-#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
- if ((fp->_flags & __SWR) != 0 || fp->_r < 0)
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+ if ((fp_->_flags & __SWR) != 0 || fp_->_r < 0)
return 0;
- return fp->_r
- + (HASUB (fp) ? fp->_ur : 0);
+# if defined __DragonFly__
+ return __sreadahead (fp);
+# else
+ return fp_->_r
+ + (HASUB (fp) ? fp_->_ur : 0);
+# endif
#elif defined __EMX__ /* emx+gcc */
if ((fp->_flags & _IOWRT) != 0)
return 0;
+ (fp->_Mode & 0x4000 /* _MBYTE */
? (fp->_Back + sizeof (fp->_Back)) - fp->_Rback
: 0);
+#elif defined __MINT__ /* Atari FreeMiNT */
+ if (!fp->__mode.__read)
+ return 0;
+ return (fp->__pushed_back
+ ? fp->__get_limit - fp->__pushback_bufp + 1
+ : fp->__get_limit - fp->__bufp);
+#elif defined SLOW_BUT_NO_HACKS /* users can define this */
+ abort ();
+ return 0;
#else
#error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
#endif