emul/mini/src/main/java/java/util/zip/Checksum.java
author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
Thu, 07 Feb 2013 12:58:12 +0100
branchemul
changeset 694 0d277415ed02
permissions -rw-r--r--
Rebasing the Inflater support on jzlib which, unlike GNU ClassPath, has correct implementation of Huffman code. Making the implementation more easily testable by turning Inflater and ZipInputStream into pure delegates. Current implementation is going to need proper long support.
     1 /*
     2  * Copyright (c) 1996, 1999, Oracle and/or its affiliates. All rights reserved.
     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     4  *
     5  * This code is free software; you can redistribute it and/or modify it
     6  * under the terms of the GNU General Public License version 2 only, as
     7  * published by the Free Software Foundation.  Oracle designates this
     8  * particular file as subject to the "Classpath" exception as provided
     9  * by Oracle in the LICENSE file that accompanied this code.
    10  *
    11  * This code is distributed in the hope that it will be useful, but WITHOUT
    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    14  * version 2 for more details (a copy is included in the LICENSE file that
    15  * accompanied this code).
    16  *
    17  * You should have received a copy of the GNU General Public License version
    18  * 2 along with this work; if not, write to the Free Software Foundation,
    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    20  *
    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    22  * or visit www.oracle.com if you need additional information or have any
    23  * questions.
    24  */
    25 
    26 package java.util.zip;
    27 
    28 /**
    29  * An interface representing a data checksum.
    30  *
    31  * @author      David Connelly
    32  */
    33 public
    34 interface Checksum {
    35     /**
    36      * Updates the current checksum with the specified byte.
    37      *
    38      * @param b the byte to update the checksum with
    39      */
    40     public void update(int b);
    41 
    42     /**
    43      * Updates the current checksum with the specified array of bytes.
    44      * @param b the byte array to update the checksum with
    45      * @param off the start offset of the data
    46      * @param len the number of bytes to use for the update
    47      */
    48     public void update(byte[] b, int off, int len);
    49 
    50     /**
    51      * Returns the current checksum value.
    52      * @return the current checksum value
    53      */
    54     public long getValue();
    55 
    56     /**
    57      * Resets the checksum to its initial value.
    58      */
    59     public void reset();
    60 }