1/*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2010 Aleph One Ltd.
5 *   for Toby Churchill Ltd and Brightstar Engineering
6 *
7 * Created by Charles Manning <charles@aleph1.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include "yaffs_packedtags1.h"
15#include "yportenv.h"
16
17void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ext_tags *t)
18{
19	pt->chunk_id = t->chunk_id;
20	pt->serial_number = t->serial_number;
21	pt->n_bytes = t->n_bytes;
22	pt->obj_id = t->obj_id;
23	pt->ecc = 0;
24	pt->deleted = (t->is_deleted) ? 0 : 1;
25	pt->unusedStuff = 0;
26	pt->shouldBeFF = 0xFFFFFFFF;
27
28}
29
30void yaffs_unpack_tags1(yaffs_ext_tags *t, const yaffs_PackedTags1 *pt)
31{
32	static const __u8 allFF[] =
33	    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
340xff };
35
36	if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) {
37		t->block_bad = 0;
38		if (pt->shouldBeFF != 0xFFFFFFFF)
39			t->block_bad = 1;
40		t->chunk_used = 1;
41		t->obj_id = pt->obj_id;
42		t->chunk_id = pt->chunk_id;
43		t->n_bytes = pt->n_bytes;
44		t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
45		t->is_deleted = (pt->deleted) ? 0 : 1;
46		t->serial_number = pt->serial_number;
47	} else {
48		memset(t, 0, sizeof(yaffs_ext_tags));
49	}
50}
51