1f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved. 2f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 3f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * This program and the accompanying materials are made available under 4f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * the terms of the Common Public License v1.0 which accompanies this distribution, 5f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * and is available at http://www.eclipse.org/legal/cpl-v10.html 6f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 7f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * $Id: UDataInputStream.java,v 1.1.1.1.2.1 2004/07/10 03:34:53 vlad_r Exp $ 8f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 9f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectpackage com.vladium.jcd.lib; 10f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 11f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectimport java.io.DataInputStream; 12f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectimport java.io.IOException; 13f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectimport java.io.InputStream; 14f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 15f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project// ---------------------------------------------------------------------------- 16f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project/** 17f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * A trivial extension to java.io.DataInputStream to provide methods for 18f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * reading unsigned 16- and 32-bit integers with simple mnemonics. It uses 19f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * correspondingly wider native types to preserve the full range of the unsigned 20f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * types. 21f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 22f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * @author (C) 2001, Vlad Roubtsov 23f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 24f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectpublic 25f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectfinal class UDataInputStream extends DataInputStream 26f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project{ 27f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // public: ................................................................ 28f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 29f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 30f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public UDataInputStream (final InputStream _in) 31f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 32f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project super (_in); 33f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 34f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 35f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 36f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public final int readU2 () throws IOException 37f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 38f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final short value = readShort (); 39f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 40f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return ((int) value) & 0xFFFF; // widening cast sign-extends 41f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 42f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 43f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 44f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public final long readU4 () throws IOException 45f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 46f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int value = readInt (); 47f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 48f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return ((long) value) & 0xFFFFFFFFL; // widening cast sign-extends 49f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 50f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 51f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // protected: ............................................................. 52f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 53f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // package: ............................................................... 54f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 55f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // private: ............................................................... 56f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 57f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project} // end of class 58f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project// ---------------------------------------------------------------------------- 59