mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-03 10:49:58 +00:00
87 lines
3.0 KiB
Java
87 lines
3.0 KiB
Java
/* Checksum.java - Interface to compute a data checksum
|
|
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package java.util.zip;
|
|
|
|
/*
|
|
* Written using on-line Java Platform 1.2 API Specification, as well
|
|
* as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
|
|
* Status: Believed complete and correct.
|
|
*/
|
|
|
|
/**
|
|
* Interface to compute a data checksum used by checked input/output streams.
|
|
* A data checksum can be updated by one byte or with a byte array. After each
|
|
* update the value of the current checksum can be returned by calling
|
|
* <code>getValue</code>. The complete checksum object can also be reset
|
|
* so it can be used again with new data.
|
|
*
|
|
* @see CheckedInputStream
|
|
* @see CheckedOutputStream
|
|
*
|
|
* @author Per Bothner
|
|
* @author Jochen Hoenicke
|
|
*/
|
|
public interface Checksum
|
|
{
|
|
/**
|
|
* Returns the data checksum computed so far.
|
|
*/
|
|
long getValue();
|
|
|
|
/**
|
|
* Resets the data checksum as if no update was ever called.
|
|
*/
|
|
void reset();
|
|
|
|
/**
|
|
* Adds one byte to the data checksum.
|
|
*
|
|
* @param bval the data value to add. The high byte of the int is ignored.
|
|
*/
|
|
void update (int bval);
|
|
|
|
/**
|
|
* Adds the byte array to the data checksum.
|
|
*
|
|
* @param buf the buffer which contains the data
|
|
* @param off the offset in the buffer where the data starts
|
|
* @param len the length of the data
|
|
*/
|
|
void update (byte[] buf, int off, int len);
|
|
}
|