From 124f869faae3a0f75a3825e6a8e195c17f3c626a Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Thu, 16 Oct 2014 23:34:20 +0400 Subject: initial for idea --- .../com/github/junrar/unsigned/UnsignedByte.java | 68 ++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 org.fox.ttcomics/src/main/java/com/github/junrar/unsigned/UnsignedByte.java (limited to 'org.fox.ttcomics/src/main/java/com/github/junrar/unsigned/UnsignedByte.java') diff --git a/org.fox.ttcomics/src/main/java/com/github/junrar/unsigned/UnsignedByte.java b/org.fox.ttcomics/src/main/java/com/github/junrar/unsigned/UnsignedByte.java new file mode 100644 index 0000000..f59ce96 --- /dev/null +++ b/org.fox.ttcomics/src/main/java/com/github/junrar/unsigned/UnsignedByte.java @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved. + * Original author: Edmund Wagner + * Creation date: 04.06.2007 + * + * Source: $HeadURL$ + * Last changed: $LastChangedDate$ + * + * + * the unrar licence applies to all junrar source and binary distributions + * you are not allowed to use this source to re-create the RAR compression algorithm + * + * Here some html entities which can be used for escaping javadoc tags: + * "&": "&" or "&" + * "<": "<" or "<" + * ">": ">" or ">" + * "@": "@" + */ +package com.github.junrar.unsigned; + +import com.github.junrar.crc.RarCRC; + +/** + * DOCUMENT ME + * + * @author $LastChangedBy$ + * @version $LastChangedRevision$ + */ +public class UnsignedByte { + + public static byte longToByte(long unsignedByte1){ + return (byte) (unsignedByte1&0xff); + } + public static byte intToByte(int unsignedByte1){ + return (byte) (unsignedByte1&0xff); + } + public static byte shortToByte(short unsignedByte1){ + return (byte) (unsignedByte1&0xff); + } + + + public static short add(byte unsignedByte1, byte unsignedByte2){ + return (short) (unsignedByte1 + unsignedByte2); + } + + public static short sub(byte unsignedByte1, byte unsignedByte2){ + + return (short) (unsignedByte1 - unsignedByte2); + } + + + public static void main(String[] args) + { + //tests unsigned (signed) + //add + System.out.println(add((byte)0xfe,(byte)0x01)); //255 (-1) + System.out.println(add((byte)0xff,(byte)0x01)); //0 (0) + System.out.println(add((byte)0x7f,(byte)0x01)); //128 (-128) + System.out.println(add((byte)0xff,(byte)0xff)); //254 (-2) + + //sub + System.out.println(sub((byte)0xfe,(byte)0x01)); //253 (-3) + System.out.println(sub((byte)0x00,(byte)0x01)); //255 (-1) + System.out.println(sub((byte)0x80,(byte)0x01)); //127 (127) + //mul + System.out.println((byte)-1*(byte)-1); + } +} -- cgit v1.2.3