| /* |
| * 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); |
| } |