92 lines
3.5 KiB
Java
92 lines
3.5 KiB
Java
/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @run main/othervm/native -Xcheck:jni StringPlatformChars
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*/
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import java.util.Arrays;
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public class StringPlatformChars {
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private static final String JNU_ENCODING = System.getProperty("sun.jnu.encoding");
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public static void main(String... args) throws Exception {
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System.out.println("sun.jnu.encoding: " + JNU_ENCODING);
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System.loadLibrary("stringPlatformChars");
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// Test varying lengths, provoking different allocation paths
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StringBuilder unicodeSb = new StringBuilder();
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StringBuilder asciiSb = new StringBuilder();
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StringBuilder latinSb = new StringBuilder();
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for (int i = 0; i < 2000; i++) {
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unicodeSb.append('\uFEFE');
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testString(unicodeSb.toString());
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asciiSb.append('x');
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testString(asciiSb.toString());
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latinSb.append('\u00FE');
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testString(latinSb.toString());
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testString(latinSb.toString() + asciiSb.toString() + unicodeSb.toString());
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}
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// Exhaustively test simple Strings made up of all possible chars:
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for (char c = '\u0001'; c < Character.MAX_VALUE; c++) {
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testString(String.valueOf(c));
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}
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// Special case: \u0000 is treated as end-of-string in the native code,
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// so strings with it should be truncated:
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if (getBytes("\u0000abcdef").length != 0 ||
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getBytes("a\u0000bcdef").length != 1) {
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System.out.println("Mismatching values for strings including \\u0000");
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throw new AssertionError();
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}
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}
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private static void testString(String s) throws Exception {
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byte[] nativeBytes = getBytes(s);
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byte[] stringBytes = s.getBytes(JNU_ENCODING);
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if (!Arrays.equals(nativeBytes, stringBytes)) {
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System.out.println("Mismatching values for: '" + s + "' " + Arrays.toString(s.chars().toArray()));
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System.out.println("Native: " + Arrays.toString(nativeBytes));
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System.out.println("String: " + Arrays.toString(stringBytes));
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throw new AssertionError(s);
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}
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String javaNewS = new String(nativeBytes, JNU_ENCODING);
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String nativeNewS = newString(nativeBytes);
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if (!javaNewS.equals(nativeNewS)) {
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System.out.println("New string via native doesn't match via java: '" + javaNewS + "' and '" + nativeNewS + "'");
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throw new AssertionError(s);
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}
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}
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static native byte[] getBytes(String string);
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static native String newString(byte[] bytes);
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}
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