1 /*

     2  * Copyright (c) 1999, 2006, 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 /* @test

    25  * @bug 4085160 4139951 5005831

    26  * @summary Test that required character encodings are supported

    27  */

    28 

    29 import java.io.InputStreamReader;

    30 import java.io.OutputStreamWriter;

    31 import java.io.ByteArrayInputStream;

    32 import java.io.ByteArrayOutputStream;

    33 import java.nio.charset.Charset;

    34 import java.nio.charset.UnsupportedCharsetException;

    35 

    36 

    37 public class Encodings {

    38 

    39 

    40     static boolean equals(byte[] a, byte[] b) {

    41         if (a.length != b.length) return false;

    42         for (int i = 0; i < a.length; i++)

    43             if (a[i] != b[i]) return false;

    44         return true;

    45     }

    46 

    47 

    48     static void go(String enc, String str, final byte[] bytes, boolean bidir)

    49         throws Exception

    50     {

    51         final Charset charset = Charset.forName(enc);

    52 

    53         /* String(byte[] bs, String enc) */

    54         if (!(new String(bytes, enc).equals(str)))

    55             throw new Exception(enc + ": String constructor failed");

    56 

    57         /* String(byte[] bs, Charset charset) */

    58         if (!(new String(bytes, charset).equals(str)))

    59             throw new Exception(charset + ": String constructor failed");

    60 

    61         /* String(byte[] bs, int off, int len, Charset charset) */

    62         String start = str.substring(0, 2);

    63         String end = str.substring(2);

    64         if (enc.equals("UTF-16BE") || enc.equals("UTF-16LE")) {

    65             if (!(new String(bytes, 0, 4, charset).equals(start)))

    66                 throw new Exception(charset + ": String constructor failed");

    67             if (!(new String(bytes, 4, bytes.length - 4, charset).equals(end)))

    68                 throw new Exception(charset + ": String constructor failed");

    69         } else if (enc.equals("UTF-16")) {

    70             if (!(new String(bytes, 0, 6, charset).equals(start)))

    71                 throw new Exception(charset + ": String constructor failed");

    72         } else {

    73             if (!(new String(bytes, 0, 2, charset).equals(start)))

    74                 throw new Exception(charset + ": String constructor failed");

    75             if (!(new String(bytes, 2, bytes.length - 2, charset).equals(end)))

    76                 throw new Exception(charset + ": String constructor failed");

    77         }

    78 

    79         /* InputStreamReader */

    80         ByteArrayInputStream bi = new ByteArrayInputStream(bytes);

    81         InputStreamReader r = new InputStreamReader(bi, enc);

    82         String inEnc = r.getEncoding();

    83         int n = str.length();

    84         char[] cs = new char[n];

    85         for (int i = 0; i < n;) {

    86             int m;

    87             if ((m = r.read(cs, i, n - i)) < 0)

    88                 throw new Exception(enc + ": EOF on InputStreamReader");

    89             i += m;

    90         }

    91         if (!(new String(cs).equals(str)))

    92             throw new Exception(enc + ": InputStreamReader failed");

    93 

    94         if (!bidir) {

    95             System.err.println(enc + " --> " + inEnc);

    96             return;

    97         }

    98 

    99         /* String.getBytes(String enc) */

   100         byte[] bs = str.getBytes(enc);

   101         if (!equals(bs, bytes))

   102             throw new Exception(enc + ": String.getBytes failed");

   103 

   104         /* String.getBytes(Charset charset) */

   105         bs = str.getBytes(charset);

   106         if (!equals(bs, bytes))

   107             throw new Exception(charset + ": String.getBytes failed");

   108 

   109         // Calls to String.getBytes(Charset) shouldn't automatically

   110         // use the cached thread-local encoder.

   111         if (charset.name().equals("UTF-16BE")) {

   112             String s = new String(bytes, charset);

   113             // Replace the thread-local encoder with this one.

   114             byte[] bb = s.getBytes(Charset.forName("UTF-16LE"));

   115             if (bytes.length != bb.length) {

   116                 // Incidental test.

   117                 throw new RuntimeException("unequal length: "

   118                                            + bytes.length + " != "

   119                                            + bb.length);

   120             } else {

   121                 boolean diff = false;

   122                 // Expect different byte[] between UTF-16LE and UTF-16BE

   123                 // even though encoder was previously cached by last call

   124                 // to getBytes().

   125                 for (int i = 0; i < bytes.length; i++) {

   126                     if (bytes[i] != bb[i])

   127                         diff = true;

   128                 }

   129                 if (!diff)

   130                     throw new RuntimeException("byte arrays equal");

   131             }

   132         }

   133 

   134         /* OutputStreamWriter */

   135         ByteArrayOutputStream bo = new ByteArrayOutputStream();

   136         OutputStreamWriter w = new OutputStreamWriter(bo, enc);

   137         String outEnc = w.getEncoding();

   138         w.write(str);

   139         w.close();

   140         bs = bo.toByteArray();

   141         if (!equals(bs, bytes))

   142             throw new Exception(enc + ": OutputStreamWriter failed");

   143 

   144         System.err.println(enc + " --> " + inEnc + " / " + outEnc);

   145     }

   146 

   147 

   148     static void go(String enc, String str, byte[] bytes) throws Exception {

   149         go(enc, str, bytes, true);

   150     }

   151 

   152 

   153     public static void main(String[] args) throws Exception {

   154 

   155         go("US-ASCII", "abc", new byte[] { 'a', 'b', 'c' });

   156         go("us-ascii", "abc", new byte[] { 'a', 'b', 'c' });

   157         go("ISO646-US", "abc", new byte[] { 'a', 'b', 'c' });

   158         go("ISO-8859-1", "ab\u00c7", new byte[] { 'a', 'b', (byte)'\u00c7' });

   159         go("UTF-8", "ab\u1e09",

   160            new byte[] { 'a', 'b',

   161                         (byte)(0xe0 | (0x0f & (0x1e09 >> 12))),

   162                         (byte)(0x80 | (0x3f & (0x1e09 >> 6))),

   163                         (byte)(0x80 | (0x3f & 0x1e09)) });

   164         go("UTF-16BE", "ab\u1e09",

   165            new byte[] { 0, 'a', 0, 'b', 0x1e, 0x09 });

   166         go("UTF-16LE", "ab\u1e09",

   167            new byte[] { 'a', 0, 'b', 0, 0x09, 0x1e });

   168 

   169         /* UTF-16 accepts both byte orders on input but always uses big-endian

   170          * on output, so test all three cases

   171          */

   172         go("UTF-16", "ab\u1e09",

   173            new byte[] { (byte)0xfe, (byte)0xff, 0, 'a', 0, 'b', 0x1e, 0x09 });

   174         go("UTF-16", "ab\u1e09",

   175            new byte[] { (byte)0xff, (byte)0xfe, 'a', 0, 'b', 0, 0x09, 0x1e },

   176            false);

   177     }

   178 

   179 }