1 files changed, 78 insertions, 0 deletions
diff --git a/REORG.TODO/libio/ioseekoff.c b/REORG.TODO/libio/ioseekoff.c
new file mode 100644
index 0000000000..425c020c51
--- /dev/null
+++ b/REORG.TODO/libio/ioseekoff.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.
+
+   As a special exception, if you link the code in this file with
+   files compiled with a GNU compiler to produce an executable,
+   that does not cause the resulting executable to be covered by
+   the GNU Lesser General Public License.  This exception does not
+   however invalidate any other reasons why the executable file
+   might be covered by the GNU Lesser General Public License.
+   This exception applies to code released by its copyright holders
+   in files containing the exception.  */
+
+#include <stdlib.h>
+#include <libioP.h>
+#include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+#ifndef __set_errno
+# define __set_errno(Val) errno = (Val)
+#endif
+
+_IO_off64_t
+_IO_seekoff_unlocked (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
+{
+  if (dir != _IO_seek_cur && dir != _IO_seek_set && dir != _IO_seek_end)
+    {
+      __set_errno (EINVAL);
+      return EOF;
+    }
+
+  /* If we have a backup buffer, get rid of it, since the __seekoff
+     callback may not know to do the right thing about it.
+     This may be over-kill, but it'll do for now. TODO */
+  if (mode != 0 && ((_IO_fwide (fp, 0) < 0 && _IO_have_backup (fp))
+		    || (_IO_fwide (fp, 0) > 0 && _IO_have_wbackup (fp))))
+    {
+      if (dir == _IO_seek_cur && _IO_in_backup (fp))
+	{
+	  if (_IO_vtable_offset (fp) != 0 || fp->_mode <= 0)
+	    offset -= fp->_IO_read_end - fp->_IO_read_ptr;
+	  else
+	    abort ();
+	}
+      if (_IO_fwide (fp, 0) < 0)
+	_IO_free_backup_area (fp);
+      else
+	_IO_free_wbackup_area (fp);
+    }
+
+  return _IO_SEEKOFF (fp, offset, dir, mode);
+}
+
+
+_IO_off64_t
+_IO_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
+{
+  _IO_off64_t retval;
+
+  _IO_acquire_lock (fp);
+  retval = _IO_seekoff_unlocked (fp, offset, dir, mode);
+  _IO_release_lock (fp);
+  return retval;
+}