1/* 2 * Copyright (c) 1997, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* @test 25 @bug 1238944 26 @summary Check for correct implementation of LineNumberInputStream.available 27 */ 28 29import java.io.*; 30 31 32public class Available { 33 34 static void check(int a, int bound) throws Exception { 35 if (a > bound) { 36 throw new Exception("Available returned " + a + " > " + bound); 37 } 38 } 39 40 public static void main(String args[]) throws Exception { 41 LineNumberInputStream in = new LineNumberInputStream(new MyInStream()); 42 check(in.available(), 5); 43 in.read(); 44 in.read(); 45 check(in.available(), 4); 46 in.read(); 47 in.read(); 48 in.read(); 49 check(in.available(), 2); 50 } 51 52} 53 54 55class MyInStream extends InputStream { 56 57 char[] buf = {'a', 'b', 'c', 'd', '\n', 58 'e', 'f', '\r', '\n', 'g'}; 59 int ctr = 0; 60 61 public int read() { 62 return ((ctr == 12) ? -1 : (int)buf[ctr++]); 63 } 64 65 public int available() { 66 return (10 - ctr); 67 } 68 69} 70