headerblockconstants.java

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/* ====================================================================
   Copyright 2002-2004   Apache Software Foundation

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */
        

package org.apache.poi.poifs.storage;

import org.apache.poi.poifs.common.POIFSConstants;
import org.apache.poi.util.IntegerField;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.LittleEndianConsts;
import org.apache.poi.util.LongField;
import org.apache.poi.util.ShortField;

/**
 * Constants used in reading/writing the Header block
 *
 * @author Marc Johnson (mjohnson at apache dot org)
 */

public interface HeaderBlockConstants
{
    public static final long _signature               = 0xE11AB1A1E011CFD0L;
    public static final int  _bat_array_offset        = 0x4c;
    public static final int  _max_bats_in_header      =
        (POIFSConstants.BIG_BLOCK_SIZE - _bat_array_offset)
        / LittleEndianConsts.INT_SIZE;

    // useful offsets
    public static final int  _signature_offset        = 0;
    public static final int  _bat_count_offset        = 0x2C;
    public static final int  _property_start_offset   = 0x30;
    public static final int  _sbat_start_offset       = 0x3C;
    public static final int  _sbat_block_count_offset = 0x40;
    public static final int  _xbat_start_offset       = 0x44;
    public static final int  _xbat_count_offset       = 0x48;
}   // end public interface HeaderBlockConstants