[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/libio/ioseekoff.c b/ap/libc/glibc/glibc-2.23/libio/ioseekoff.c
new file mode 100644
index 0000000..05d90bb
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/libio/ioseekoff.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 1993-2016 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;
+}