headerblockconstants.java

Office格式转换代码

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", nor may "Apache" appear in their name, without
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

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