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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, 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 | |||
| 27 | /* | ||
| 28 | * The Original Code is HAT. The Initial Developer of the | ||
| 29 | * Original Code is Bill Foote, with contributions from others | ||
| 30 | * at JavaSoft/Sun. | ||
| 31 | */ | ||
| 32 | |||
| 33 | package com.sun.tools.hat.internal.parser; | ||
| 34 | |||
| 35 | import java.io.FilterInputStream; | ||
| 36 | import java.io.IOException; | ||
| 37 | import java.io.InputStream; | ||
| 38 | |||
| 39 | /** | ||
| 40 | * InputStream that keeps track of total bytes read (in effect | ||
| 41 | * 'position' in stream) from the input stream. | ||
| 42 | * | ||
| 43 | */ | ||
| 44 | public class PositionInputStream extends FilterInputStream { | ||
| 45 | private long position = 0L; | ||
| 46 | |||
| 47 | public PositionInputStream(InputStream in) { | ||
| 48 | super(in); | ||
| 49 | } | ||
| 50 | |||
| 51 | public int read() throws IOException { | ||
| 52 | int res = super.read(); | ||
| 53 | if (res != -1) position++; | ||
| 54 | return res; | ||
| 55 | } | ||
| 56 | |||
| 57 | public int read(byte[] b, int off, int len) throws IOException { | ||
| 58 | int res = super.read(b, off, len); | ||
| 59 | if (res != -1) position += res; | ||
| 60 | return res; | ||
| 61 | } | ||
| 62 | |||
| 63 | public long skip(long n) throws IOException { | ||
| 64 | long res = super.skip(n); | ||
| 65 | position += res; | ||
| 66 | return res; | ||
| 67 | } | ||
| 68 | |||
| 69 | public boolean markSupported() { | ||
| 70 | return false; | ||
| 71 | } | ||
| 72 | |||
| 73 | public void mark(int readLimit) { | ||
| 74 | throw new UnsupportedOperationException("mark"); | ||
| 75 | } | ||
| 76 | |||
| 77 | public void reset() { | ||
| 78 | throw new UnsupportedOperationException("reset"); | ||
| 79 | } | ||
| 80 | |||
| 81 | public long position() { | ||
| 82 | return position; | ||
| 83 | } | ||
| 84 | } | ||