1 /*

     2  * Copyright (c) 1996, 2003, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.io;

    27 

    28 import sun.nio.cs.ext.EUC_TW;

    29 

    30 /*

    31  * @author Limin Shi

    32  */

    33 

    34 public class CharToByteEUC_TW extends CharToByteConverter

    35 {

    36     private final EUC_TW.Encoder enc = (EUC_TW.Encoder)(new EUC_TW().newEncoder());

    37 

    38     public int flush(byte[] output, int outStart, int outEnd)

    39         throws MalformedInputException

    40     {

    41         reset();

    42         return 0;

    43     }

    44 

    45     public void reset() {

    46         byteOff = charOff = 0;

    47     }

    48 

    49     public boolean canConvert(char ch){

    50         return enc.canEncode(ch);

    51     }

    52 

    53     /**

    54      * Character conversion

    55      */

    56     public int convert(char[] input, int inOff, int inEnd,

    57                        byte[] output, int outOff, int outEnd)

    58         throws UnknownCharacterException, MalformedInputException,

    59                ConversionBufferFullException

    60     {

    61         int outputSize;

    62         byte [] tmpbuf = new byte[4];;

    63         byte [] outputByte;

    64         byteOff = outOff;

    65 

    66         //Fixed 4122961 by bringing the charOff++ out to this

    67         // loop where it belongs, changing the loop from

    68         // while(){} to for(){}.

    69         for (charOff = inOff; charOff < inEnd; charOff++) {

    70             outputByte = tmpbuf;

    71             if ( input[charOff] < 0x80) {       // ASCII

    72                 outputSize = 1;

    73                 outputByte[0] = (byte)(input[charOff] & 0x7f);

    74             } else {

    75                 outputSize = enc.toEUC(input[charOff], outputByte);

    76             }

    77 

    78             if (outputSize == -1) {

    79                 if (subMode) {

    80                     outputByte = subBytes;

    81                     outputSize = subBytes.length;

    82                 } else {

    83                     badInputLength = 1;

    84                     throw new UnknownCharacterException();

    85                 }

    86             }

    87 

    88             if (outEnd - byteOff < outputSize)

    89                 throw new ConversionBufferFullException();

    90 

    91             for (int i = 0; i < outputSize; i++)

    92                 output[byteOff++] = outputByte[i];

    93         }

    94 

    95         return byteOff - outOff;

    96 

    97     }

    98 

    99     /**

   100      * returns the maximum number of bytes needed to convert a char

   101      */

   102     public int getMaxBytesPerChar() {

   103         return 4;

   104     }

   105 

   106     /**

   107      * Return the character set ID

   108      */

   109     public String getCharacterEncoding() {

   110         return "EUC_TW";

   111     }

   112 }