/*
   * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
   *

   * Copyright (C) 2002-2011 Aleph One Ltd.

   *   for Toby Churchill Ltd and Brightstar Engineering
   *
   * Created by Charles Manning <charles@aleph1.co.uk>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #include "yaffs_packedtags1.h"
  #include "yportenv.h"

  static const u8 all_ff[20] = {
  	0xff, 0xff, 0xff, 0xff,
  	0xff, 0xff, 0xff, 0xff,
  	0xff, 0xff, 0xff, 0xff,
  	0xff, 0xff, 0xff, 0xff,
  	0xff, 0xff, 0xff, 0xff
  };
  
  void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
  		      const struct yaffs_ext_tags *t)

  {

  	pt->chunk_id = t->chunk_id;
  	pt->serial_number = t->serial_number;
  	pt->n_bytes = t->n_bytes;
  	pt->obj_id = t->obj_id;

  	pt->ecc = 0;

  	pt->deleted = (t->is_deleted) ? 0 : 1;
  	pt->unused_stuff = 0;
  	pt->should_be_ff = 0xffffffff;

  }

  void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
  			const struct yaffs_packed_tags1 *pt)

  {

  	if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) {
  		t->block_bad = 0;
  		if (pt->should_be_ff != 0xffffffff)
  			t->block_bad = 1;
  		t->chunk_used = 1;
  		t->obj_id = pt->obj_id;
  		t->chunk_id = pt->chunk_id;
  		t->n_bytes = pt->n_bytes;
  		t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
  		t->is_deleted = (pt->deleted) ? 0 : 1;
  		t->serial_number = pt->serial_number;

  	} else {

  		memset(t, 0, sizeof(struct yaffs_ext_tags));

  	}
  }