src/main/java/org/apache/commons/compress/archivers/zip/ZipConstants.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *   https://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.commons.compress.archivers.zip;

/**
 * Various constants used throughout the package.
 *
 * @since 1.3
 */
final class ZipConstants {

    /** Masks last eight bits */
    static final int BYTE_MASK = 0xFF;

    /** Length of a ZipShort in bytes */
    static final int SHORT = 2;

    /** Length of a ZipLong in bytes */
    static final int WORD = 4;

    /** Length of a ZipEightByteInteger in bytes */
    static final int DWORD = 8;

    /** Initial ZIP specification version */
    static final int INITIAL_VERSION = 10;

    /**
     * ZIP specification version that introduced DEFLATE compression method.
     *
     * @since 1.15
     */
    static final int DEFLATE_MIN_VERSION = 20;

    /** ZIP specification version that introduced data descriptor method */
    static final int DATA_DESCRIPTOR_MIN_VERSION = 20;

    /** ZIP specification version that introduced ZIP64 */
    static final int ZIP64_MIN_VERSION = 45;

    /**
     * Value stored in two-byte size and similar fields if ZIP64 extensions are used.
     */
    static final int ZIP64_MAGIC_SHORT = 0xFFFF;

    /**
     * Value stored in four-byte size and similar fields if ZIP64 extensions are used.
     */
    static final long ZIP64_MAGIC = 0xFFFFFFFFL;

    private ZipConstants() {
    }

}