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/*
* Copyright (c) 2000, 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 4329985
* @summary Ensure that BufferedReader's ready() method handles the new line
* character following the carriage return correctly and returns the right
* value so that a read operation after a ready() does not block unnecessarily.
*/
import java.io.*;
public class Ready {
public static void main(String[] args) throws IOException {
BufferedReader reader;
String[] strings = {
"LF-Only\n",
"LF-Only\n",
"CR/LF\r\n",
"CR/LF\r\n",
"CR-Only\r",
"CR-Only\r",
"CR/LF line\r\nMore data.\r\n",
"CR/LF line\r\nMore data.\r\n"
};
// The buffer sizes are chosen such that the boundary conditions are
// tested.
int[] bufsizes = { 7, 8, 6, 5, 7, 8, 11, 10};
for (int i = 0; i < strings.length; i++) {
reader = new BufferedReader(new BoundedReader(strings[i]),
bufsizes[i]);
while (reader.ready()) {
String str = reader.readLine();
System.out.println("read>>" + str);
}
}
}
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("Hit infinite wait condition");
return content[pos++];
}
public int read(char[] buf, int offset, int length)
throws IOException
{
if (pos >= limit)
throw new RuntimeException("Hit infinite wait condition");
int oldPos = pos;
int readlen = (length > (limit - pos)) ? (limit - pos) : length;
for (int i = offset; i < readlen; i++) {
buf[i] = (char)read();
}
return (pos - oldPos);
}
public void close() {}
public boolean ready() {
if (pos < limit)
return true;
else
return false;
}
}
}
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