| /* |
| * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* @test |
| * @bug 4151072 |
| * @summary Ensure that BufferedReader's methods handle the new line character |
| * following the carriage return correctly after a readLine |
| * operation that resulted in reading a line terminated by a |
| * carriage return (\r). |
| */ |
| import java.io.*; |
| |
| public class ReadLine { |
| |
| public static void main(String[] args) throws IOException { |
| // Make sure that the reader does not wait for additional characters to |
| // be read after reading a new line. |
| BufferedReader reader; |
| String[][] strings = { |
| {"CR/LF\r\n", "CR/LF"}, |
| {"LF-Only\n", "LF-Only"}, |
| {"CR-Only\r", "CR-Only"}, |
| {"CR/LF line\r\nMore data", "More data"} |
| }; |
| |
| // test 0 "CR/LF\r\n" |
| // test 1 "LF-Only\n" |
| // test 2 "CR-Only\r" |
| for (int i = 0; i < 3; i++) { |
| reader = new BufferedReader(new |
| BoundedReader(strings[i][0]), strings[i][0].length()); |
| if (!reader.readLine().equals(strings[i][1])) |
| throw new RuntimeException("Read incorrect text"); |
| } |
| |
| |
| // Now test the mark and reset operations. Consider two cases. |
| // 1. For lines ending with CR only. |
| markResetTest("Lot of textual data\rMore textual data\n", |
| "More textual data"); |
| |
| // 2. Now for lines ending with CR/LF |
| markResetTest("Lot of textual data\r\nMore textual data\n", |
| "More textual data"); |
| |
| // 3. Now for lines ending with LF only |
| markResetTest("Lot of textual data\nMore textual data\n", |
| "More textual data"); |
| |
| // Need to ensure behavior of read() after a readLine() read of a CR/LF |
| // terminated line. |
| // 1. For lines ending with CR/LF only. |
| |
| // uses "CR/LF line\r\nMore data" |
| reader = new BufferedReader(new |
| BoundedReader(strings[3][0]), strings[3][0].length()); |
| reader.readLine(); |
| if (reader.read() != 'M') |
| throw new RuntimeException("Read() failed"); |
| |
| |
| // Need to ensure that a read(char[], int, int) following a readLine() |
| // read of a CR/LF terminated line behaves correctly. |
| |
| // uses "CR/LF line\r\nMore data" |
| reader = new BufferedReader(new |
| BoundedReader(strings[3][0]), strings[3][0].length()); |
| reader.readLine(); |
| |
| char[] buf = new char[9]; |
| reader.read(buf, 0, 9); |
| String newStr = new String(buf); |
| if (!newStr.equals(strings[3][1])) |
| throw new RuntimeException("Read(char[],int,int) failed"); |
| } |
| |
| static void markResetTest(String inputStr, String resetStr) |
| throws IOException { |
| BufferedReader reader = new BufferedReader(new |
| BoundedReader(inputStr), inputStr.length()); |
| System.out.println("> " + reader.readLine()); |
| reader.mark(30); |
| System.out.println("......Marking stream ....."); |
| String str = reader.readLine(); |
| System.out.println("> " + str); |
| reader.reset(); |
| String newStr = reader.readLine(); |
| System.out.println("reset> " + newStr); |
| |
| // Make sure that the reset point was set correctly. |
| if (!newStr.equals(resetStr)) |
| throw new RuntimeException("Mark/Reset failed"); |
| } |
| |
| |
| private static class BoundedReader extends Reader{ |
| |
| private char[] content; |
| private int limit; |
| private int pos = 0; |
| |
| public BoundedReader(String content) { |
| this.limit = content.length(); |
| this.content = new char[limit]; |
| content.getChars(0, limit, this.content, 0); |
| } |
| |
| public int read() throws IOException { |
| if (pos >= limit) |
| throw new RuntimeException("Read past limit"); |
| return content[pos++]; |
| } |
| |
| public int read(char[] buf, int offset, int length) |
| throws IOException |
| { |
| int oldPos = pos; |
| for (int i = offset; i < length; i++) { |
| buf[i] = (char)read(); |
| } |
| return (pos - oldPos); |
| } |
| |
| public void close() {} |
| } |
| |
| } |