/*
 * JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.com)
 *
 * 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 jef.tools.zip;

/*
 * This interface defines the constants that are used by the classes
 * which manipulate ZIP files.
 *
 * @version	1.19, 11/17/05
 * @author	David Connelly
 */
interface ZipConstants {
    /*
     * Header signatures
     */
    static long LOCSIG = 0x04034b50L;	// "PK\003\004"
    static long EXTSIG = 0x08074b50L;	// "PK\007\008"
    static long CENSIG = 0x02014b50L;	// "PK\001\002"
    static long ENDSIG = 0x06054b50L;	// "PK\005\006"

    /*
     * Header sizes in bytes (including signatures)
     */
    static final int LOCHDR = 30;	// LOC header size
    static final int EXTHDR = 16;	// EXT header size
    static final int CENHDR = 46;	// CEN header size
    static final int ENDHDR = 22;	// END header size

    /*
     * Local file (LOC) header field offsets
     */
    static final int LOCVER = 4;	// version needed to extract
    static final int LOCFLG = 6;	// general purpose bit flag
    static final int LOCHOW = 8;	// compression method
    static final int LOCTIM = 10;	// modification time
    static final int LOCCRC = 14;	// uncompressed file crc-32 value
    static final int LOCSIZ = 18;	// compressed size
    static final int LOCLEN = 22;	// uncompressed size
    static final int LOCNAM = 26;	// filename length
    static final int LOCEXT = 28;	// extra field length

    /*
     * Extra local (EXT) header field offsets
     */
    static final int EXTCRC = 4;	// uncompressed file crc-32 value
    static final int EXTSIZ = 8;	// compressed size
    static final int EXTLEN = 12;	// uncompressed size

    /*
     * Central directory (CEN) header field offsets
     */
    static final int CENVEM = 4;	// version made by
    static final int CENVER = 6;	// version needed to extract
    static final int CENFLG = 8;	// encrypt, decrypt flags
    static final int CENHOW = 10;	// compression method
    static final int CENTIM = 12;	// modification time
    static final int CENCRC = 16;	// uncompressed file crc-32 value
    static final int CENSIZ = 20;	// compressed size
    static final int CENLEN = 24;	// uncompressed size
    static final int CENNAM = 28;	// filename length
    static final int CENEXT = 30;	// extra field length
    static final int CENCOM = 32;	// comment length
    static final int CENDSK = 34;	// disk number start
    static final int CENATT = 36;	// internal file attributes
    static final int CENATX = 38;	// external file attributes
    static final int CENOFF = 42;	// LOC header offset

    /*
     * End of central directory (END) header field offsets
     */
    static final int ENDSUB = 8;	// number of entries on this disk
    static final int ENDTOT = 10;	// total number of entries
    static final int ENDSIZ = 12;	// central directory size in bytes
    static final int ENDOFF = 16;	// offset of first CEN header
    static final int ENDCOM = 20;	// zip file comment length
}