|
/*
* Copyright (c) 1999, 2006, 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 4085160 4139951 5005831
* @summary Test that required character encodings are supported
*/
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
public class Encodings {
static boolean equals(byte[] a, byte[] b) {
if (a.length != b.length) return false;
for (int i = 0; i < a.length; i++)
if (a[i] != b[i]) return false;
return true;
}
static void go(String enc, String str, final byte[] bytes, boolean bidir)
throws Exception
{
final Charset charset = Charset.forName(enc);
/* String(byte[] bs, String enc) */
if (!(new String(bytes, enc).equals(str)))
throw new Exception(enc + ": String constructor failed");
/* String(byte[] bs, Charset charset) */
if (!(new String(bytes, charset).equals(str)))
throw new Exception(charset + ": String constructor failed");
/* String(byte[] bs, int off, int len, Charset charset) */
String start = str.substring(0, 2);
String end = str.substring(2);
if (enc.equals("UTF-16BE") || enc.equals("UTF-16LE")) {
if (!(new String(bytes, 0, 4, charset).equals(start)))
throw new Exception(charset + ": String constructor failed");
if (!(new String(bytes, 4, bytes.length - 4, charset).equals(end)))
throw new Exception(charset + ": String constructor failed");
} else if (enc.equals("UTF-16")) {
if (!(new String(bytes, 0, 6, charset).equals(start)))
throw new Exception(charset + ": String constructor failed");
} else {
if (!(new String(bytes, 0, 2, charset).equals(start)))
throw new Exception(charset + ": String constructor failed");
if (!(new String(bytes, 2, bytes.length - 2, charset).equals(end)))
throw new Exception(charset + ": String constructor failed");
}
/* InputStreamReader */
ByteArrayInputStream bi = new ByteArrayInputStream(bytes);
InputStreamReader r = new InputStreamReader(bi, enc);
String inEnc = r.getEncoding();
int n = str.length();
char[] cs = new char[n];
for (int i = 0; i < n;) {
int m;
if ((m = r.read(cs, i, n - i)) < 0)
throw new Exception(enc + ": EOF on InputStreamReader");
i += m;
}
if (!(new String(cs).equals(str)))
throw new Exception(enc + ": InputStreamReader failed");
if (!bidir) {
System.err.println(enc + " --> " + inEnc);
return;
}
/* String.getBytes(String enc) */
byte[] bs = str.getBytes(enc);
if (!equals(bs, bytes))
throw new Exception(enc + ": String.getBytes failed");
/* String.getBytes(Charset charset) */
bs = str.getBytes(charset);
if (!equals(bs, bytes))
throw new Exception(charset + ": String.getBytes failed");
// Calls to String.getBytes(Charset) shouldn't automatically
// use the cached thread-local encoder.
if (charset.name().equals("UTF-16BE")) {
String s = new String(bytes, charset);
// Replace the thread-local encoder with this one.
byte[] bb = s.getBytes(Charset.forName("UTF-16LE"));
if (bytes.length != bb.length) {
// Incidental test.
throw new RuntimeException("unequal length: "
+ bytes.length + " != "
+ bb.length);
} else {
boolean diff = false;
// Expect different byte[] between UTF-16LE and UTF-16BE
// even though encoder was previously cached by last call
// to getBytes().
for (int i = 0; i < bytes.length; i++) {
if (bytes[i] != bb[i])
diff = true;
}
if (!diff)
throw new RuntimeException("byte arrays equal");
}
}
/* OutputStreamWriter */
ByteArrayOutputStream bo = new ByteArrayOutputStream();
OutputStreamWriter w = new OutputStreamWriter(bo, enc);
String outEnc = w.getEncoding();
w.write(str);
w.close();
bs = bo.toByteArray();
if (!equals(bs, bytes))
throw new Exception(enc + ": OutputStreamWriter failed");
System.err.println(enc + " --> " + inEnc + " / " + outEnc);
}
static void go(String enc, String str, byte[] bytes) throws Exception {
go(enc, str, bytes, true);
}
public static void main(String[] args) throws Exception {
go("US-ASCII", "abc", new byte[] { 'a', 'b', 'c' });
go("us-ascii", "abc", new byte[] { 'a', 'b', 'c' });
go("ISO646-US", "abc", new byte[] { 'a', 'b', 'c' });
go("ISO-8859-1", "ab\u00c7", new byte[] { 'a', 'b', (byte)'\u00c7' });
go("UTF-8", "ab\u1e09",
new byte[] { 'a', 'b',
(byte)(0xe0 | (0x0f & (0x1e09 >> 12))),
(byte)(0x80 | (0x3f & (0x1e09 >> 6))),
(byte)(0x80 | (0x3f & 0x1e09)) });
go("UTF-16BE", "ab\u1e09",
new byte[] { 0, 'a', 0, 'b', 0x1e, 0x09 });
go("UTF-16LE", "ab\u1e09",
new byte[] { 'a', 0, 'b', 0, 0x09, 0x1e });
/* UTF-16 accepts both byte orders on input but always uses big-endian
* on output, so test all three cases
*/
go("UTF-16", "ab\u1e09",
new byte[] { (byte)0xfe, (byte)0xff, 0, 'a', 0, 'b', 0x1e, 0x09 });
go("UTF-16", "ab\u1e09",
new byte[] { (byte)0xff, (byte)0xfe, 'a', 0, 'b', 0, 0x09, 0x1e },
false);
}
}
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet)
¤
|
Haftungshinweis
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung ist noch experimentell.
|
