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Java > Open Source Codes > org > apache > poi > poifs > storage > HeaderBlockConstants


1
2 /* ====================================================================
3    Copyright 2002-2004 Apache Software Foundation
4
5    Licensed under the Apache License, Version 2.0 (the "License");
6    you may not use this file except in compliance with the License.
7    You may obtain a copy of the License at
8
9        http://www.apache.org/licenses/LICENSE-2.0
10
11    Unless required by applicable law or agreed to in writing, software
12    distributed under the License is distributed on an "AS IS" BASIS,
13    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14    See the License for the specific language governing permissions and
15    limitations under the License.
16 ==================================================================== */
17         
18
19 package org.apache.poi.poifs.storage;
20
21 import org.apache.poi.poifs.common.POIFSConstants;
22 import org.apache.poi.util.IntegerField;
23 import org.apache.poi.util.LittleEndian;
24 import org.apache.poi.util.LittleEndianConsts;
25 import org.apache.poi.util.LongField;
26 import org.apache.poi.util.ShortField;
27
28 /**
29  * Constants used in reading/writing the Header block
30  *
31  * @author Marc Johnson (mjohnson at apache dot org)
32  */
33
34 public interface HeaderBlockConstants
35 {
36     public static final long _signature = 0xE11AB1A1E011CFD0L;
37     public static final int _bat_array_offset = 0x4c;
38     public static final int _max_bats_in_header =
39         (POIFSConstants.BIG_BLOCK_SIZE - _bat_array_offset)
40         / LittleEndianConsts.INT_SIZE;
41
42     // useful offsets
43 public static final int _signature_offset = 0;
44     public static final int _bat_count_offset = 0x2C;
45     public static final int _property_start_offset = 0x30;
46     public static final int _sbat_start_offset = 0x3C;
47     public static final int _sbat_block_count_offset = 0x40;
48     public static final int _xbat_start_offset = 0x44;
49     public static final int _xbat_count_offset = 0x48;
50 } // end public interface HeaderBlockConstants
51
52
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