1 files changed, 35 insertions, 0 deletions
diff --git a/libio/__fbufsize.c b/libio/__fbufsize.c
new file mode 100644
index 0000000000..0791e8444f
--- /dev/null
+++ b/libio/__fbufsize.c
@@ -0,0 +1,35 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU IO Library.
+
+   This library 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 library 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 library; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
+
+   As a special exception, if you link this library with files
+   compiled with a GNU compiler to produce an executable, this does
+   not cause the resulting executable to be covered by the GNU General
+   Public License.  This exception does not however invalidate any
+   other reasons why the executable file might be covered by the GNU
+   General Public License.  */
+
+#include <stdio_ext.h>
+
+size_t
+__fbufsize (FILE *fp)
+{
+  if (fp->_mode > 0)
+    return fp->_wide_data->_IO_buf_end - fp->_wide_data->_IO_buf_base;
+  else
+    return fp->_IO_buf_end - fp->_IO_buf_base;
+}