| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | |
| 27 | /* |
| 28 | * The contents of this file are subject to the Sun Public License |
| 29 | * Version 1.0 (the "License"); you may not use this file except in |
| 30 | * compliance with the License. A copy of the License is available at |
| 31 | * http://www.sun.com/, and in the file LICENSE.html in the |
| 32 | * doc directory. |
| 33 | * |
| 34 | * The Original Code is HAT. The Initial Developer of the |
| 35 | * Original Code is Bill Foote, with contributions from others |
| 36 | * at JavaSoft/Sun. Portions created by Bill Foote and others |
| 37 | * at Javasoft/Sun are Copyright (C) 1997-2004. All Rights Reserved. |
| 38 | * |
| 39 | * In addition to the formal license, I ask that you don't |
| 40 | * change the history or donations files without permission. |
| 41 | * |
| 42 | */ |
| 43 | |
| 44 | package com.sun.tools.hat.internal.parser; |
| 45 | |
| 46 | import java.io.FilterInputStream; |
| 47 | import java.io.IOException; |
| 48 | import java.io.InputStream; |
| 49 | |
| 50 | /** |
| 51 | * InputStream that keeps track of total bytes read (in effect |
| 52 | * 'position' in stream) from the input stream. |
| 53 | * |
| 54 | */ |
| 55 | public class PositionInputStream extends FilterInputStream { |
| 56 | private long position = 0L; |
| 57 | |
| 58 | public PositionInputStream(InputStream in) { |
| 59 | super(in); |
| 60 | } |
| 61 | |
| 62 | public int read() throws IOException { |
| 63 | int res = super.read(); |
| 64 | if (res != -1) position++; |
| 65 | return res; |
| 66 | } |
| 67 | |
| 68 | public int read(byte[] b, int off, int len) throws IOException { |
| 69 | int res = super.read(b, off, len); |
| 70 | if (res != -1) position += res; |
| 71 | return res; |
| 72 | } |
| 73 | |
| 74 | public long skip(long n) throws IOException { |
| 75 | long res = super.skip(n); |
| 76 | position += res; |
| 77 | return res; |
| 78 | } |
| 79 | |
| 80 | public boolean markSupported() { |
| 81 | return false; |
| 82 | } |
| 83 | |
| 84 | public void mark(int readLimit) { |
| 85 | throw new UnsupportedOperationException("mark"); |
| 86 | } |
| 87 | |
| 88 | public void reset() { |
| 89 | throw new UnsupportedOperationException("reset"); |
| 90 | } |
| 91 | |
| 92 | public long position() { |
| 93 | return position; |
| 94 | } |
| 95 | } |