1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @run main/native StringPlatformChars 27 */ 28 import java.util.Arrays; 29 30 public class StringPlatformChars { 31 32 private static final String JNU_ENCODING = System.getProperty("sun.jnu.encoding"); 33 34 public static void main(String... args) throws Exception { 35 System.loadLibrary("stringPlatformChars"); 36 37 // Test varying lengths, provoking different allocation paths 38 StringBuilder unicodeSb = new StringBuilder(); 39 StringBuilder asciiSb = new StringBuilder(); 40 StringBuilder latinSb = new StringBuilder(); 41 42 for (int i = 0; i < 2000; i++) { 43 unicodeSb.append('\uFEFE'); 44 testString(unicodeSb.toString()); 45 46 asciiSb.append('x'); 47 testString(asciiSb.toString()); 48 49 latinSb.append('\u00FE'); 50 testString(latinSb.toString()); 51 52 testString(latinSb.toString() + asciiSb.toString() + unicodeSb.toString()); 53 } 54 55 // Exhaustively test simple Strings made up of all possible chars: 56 for (char c = '\u0001'; c < Character.MAX_VALUE; c++) { 57 testString(String.valueOf(c)); 58 } 59 // Special case: \u0000 is treated as end-of-string in the native code, 60 // so strings with it should be truncated: 61 if (getBytes("\u0000abcdef").length != 0 || 62 getBytes("a\u0000bcdef").length != 1) { 63 System.out.println("Mismatching values for strings including \\u0000"); 64 throw new AssertionError(); 65 } 66 } 67 68 private static void testString(String s) throws Exception { 69 byte[] nativeBytes = getBytes(s); 70 byte[] stringBytes = s.getBytes(JNU_ENCODING); 71 72 if (!Arrays.equals(nativeBytes, stringBytes)) { 73 System.out.println("Mismatching values for: '" + s + "'"); 74 System.out.println("Native: " + Arrays.toString(nativeBytes)); 75 System.out.println("String: " + Arrays.toString(stringBytes)); 76 throw new AssertionError(s); 77 } 78 79 String javaNewS = new String(nativeBytes, JNU_ENCODING); 80 String nativeNewS = newString(nativeBytes); 81 if (!javaNewS.equals(nativeNewS)) { 82 System.out.println("New string via native doesn't match via java: '" + javaNewS + "' and '" + nativeNewS + "'"); 83 throw new AssertionError(s); 84 } 85 } 86 87 static native byte[] getBytes(String string); 88 89 static native String newString(byte[] bytes); 90 }