/*

 * Copyright (c) 2017, 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

 * @run main/othervm/native -Xcheck:jni StringPlatformChars

 */

import java.util.Arrays;

public class StringPlatformChars {

    private static final String JNU_ENCODING = System.getProperty("sun.jnu.encoding");

    public static void main(String... args) throws Exception {

        System.out.println("sun.jnu.encoding: " + JNU_ENCODING);

        System.loadLibrary("stringPlatformChars");

        // Test varying lengths, provoking different allocation paths

        StringBuilder unicodeSb = new StringBuilder();

        StringBuilder asciiSb = new StringBuilder();

        StringBuilder latinSb = new StringBuilder();

        for (int i = 0; i < 2000; i++) {

            unicodeSb.append('\uFEFE');

            testString(unicodeSb.toString());

            asciiSb.append('x');

            testString(asciiSb.toString());

            latinSb.append('\u00FE');

            testString(latinSb.toString());

            testString(latinSb.toString() + asciiSb.toString() + unicodeSb.toString());

        }

        // Exhaustively test simple Strings made up of all possible chars:

        for (char c = '\u0001'; c < Character.MAX_VALUE; c++) {

            testString(String.valueOf(c));

        }

        // Special case: \u0000 is treated as end-of-string in the native code,

        // so strings with it should be truncated:

        if (getBytes("\u0000abcdef").length != 0 ||

            getBytes("a\u0000bcdef").length != 1) {

            System.out.println("Mismatching values for strings including \\u0000");

            throw new AssertionError();

        }

    }

    private static void testString(String s) throws Exception {

        byte[] nativeBytes = getBytes(s);

        byte[] stringBytes = s.getBytes(JNU_ENCODING);

        if (!Arrays.equals(nativeBytes, stringBytes)) {

            System.out.println("Mismatching values for: '" + s + "' " + Arrays.toString(s.chars().toArray()));

            System.out.println("Native: " + Arrays.toString(nativeBytes));

            System.out.println("String: " + Arrays.toString(stringBytes));

            throw new AssertionError(s);

        }

        String javaNewS = new String(nativeBytes, JNU_ENCODING);

        String nativeNewS = newString(nativeBytes);

        if (!javaNewS.equals(nativeNewS)) {

            System.out.println("New string via native doesn't match via java: '" + javaNewS + "' and '" + nativeNewS + "'");

            throw new AssertionError(s);

        }

    }

    static native byte[] getBytes(String string);

    static native String newString(byte[] bytes);

}