/*

 * Copyright (c) 1998, 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 4081733

   @summary Make sure LineNumberReader returns right line number

            when mark and reset are used

   */

import java.io.*;

public class MarkReset {

    /**

     * This program creates a LineNumberReader and tries to find all

     * the non-whitespace characters in the file.

     */

    public static void main(String[] args) throws Exception {

        int n, line;

        LineNumberReader reader = new LineNumberReader

                                      (new StringReader("0\r\n1\r2\n3\r\n\r5\r\r7\n\n9"));

        for (n = 0; n < 7; n++) {

            skipWhiteSpace(reader);     /* Skip all whitespace */

            int c = reader.read();      /* Read the non-whitespace character */

            if (c < 0) {                /* Might be eof */

                break;                  /* It is. Get out of the loop */

            }

            line = reader.getLineNumber();

            if(line != (c - 48)) {

                throw new Exception("Failed test : Line number expected "

                                    + (c - 48)  + " got " + line );

            }

        }

    }

    /**

     * Skip whitespace in the file. Mark and reset

     */

    private static void skipWhiteSpace(LineNumberReader reader) throws IOException {

        while (true) {

            /* Mark in case the character is not whitespace */

            reader.mark(10);

            /* Read the character */

            int c = reader.read();

            if (Character.isWhitespace((char) c)) {

                /* Loop while in whitespace */

                continue;

            }

            /* Return to the non-whitespace character */

            reader.reset();

            break;

        }

    }

}