1 /*

     2  * Copyright (c) 1996, 2005, 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 import java.nio.CharBuffer;

    27 import java.nio.ByteBuffer;

    28 import java.nio.charset.*;

    29 import sun.nio.cs.ext.EUC_KR;

    30 

    31 public class X11KSC5601_OLD extends Charset {

    32     public X11KSC5601_OLD () {

    33         super("X11KSC5601-OLD", null);

    34     }

    35     public CharsetEncoder newEncoder() {

    36         return new Encoder(this);

    37     }

    38     public CharsetDecoder newDecoder() {

    39         return new Decoder(this);

    40     }

    41 

    42     public boolean contains(Charset cs) {

    43         return cs instanceof X11KSC5601_OLD;

    44     }

    45 

    46     private class Encoder extends EUC_KR_OLD.Encoder {

    47         public Encoder(Charset cs) {

    48             super(cs);

    49         }

    50 

    51         public boolean canEncode(char c) {

    52             if (c <= 0x7F) {

    53                 return false;

    54             }

    55             return super.canEncode(c);

    56         }

    57 

    58         protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {

    59             char[] sa = src.array();

    60             int sp = src.arrayOffset() + src.position();

    61             int sl = src.arrayOffset() + src.limit();

    62             byte[] da = dst.array();

    63             int dp = dst.arrayOffset() + dst.position();

    64             int dl = dst.arrayOffset() + dst.limit();

    65 

    66             try {

    67                 while (sp < sl) {

    68                     char c = sa[sp];

    69                     if (c <= '\u007f')

    70                         return CoderResult.unmappableForLength(1);

    71                     int ncode = encodeDouble(c);

    72                     if (ncode != 0 && c != '\u0000' ) {

    73                         da[dp++] = (byte) ((ncode  >> 8) & 0x7f);

    74                         da[dp++] = (byte) (ncode & 0x7f);

    75                         sp++;

    76                         continue;

    77                     }

    78                     return CoderResult.unmappableForLength(1);

    79                 }

    80                 return CoderResult.UNDERFLOW;

    81             } finally {

    82                 src.position(sp - src.arrayOffset());

    83                 dst.position(dp - dst.arrayOffset());

    84             }

    85         }

    86         public boolean isLegalReplacement(byte[] repl) {

    87             return true;

    88         }

    89     }

    90 

    91     private class Decoder extends EUC_KR_OLD.Decoder {

    92         public Decoder(Charset cs) {

    93             super(cs);

    94         }

    95 

    96         protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) {

    97             byte[] sa = src.array();

    98             int sp = src.arrayOffset() + src.position();

    99             int sl = src.arrayOffset() + src.limit();

   100             assert (sp <= sl);

   101             sp = (sp <= sl ? sp : sl);

   102             char[] da = dst.array();

   103             int dp = dst.arrayOffset() + dst.position();

   104             int dl = dst.arrayOffset() + dst.limit();

   105             assert (dp <= dl);

   106             dp = (dp <= dl ? dp : dl);

   107 

   108 

   109             try {

   110                 while (sp < sl) {

   111                     if ( sl - sp < 2) {

   112                         return CoderResult.UNDERFLOW;

   113                     }

   114                     int b1 = sa[sp] & 0xFF | 0x80;

   115                     int b2 = sa[sp + 1] & 0xFF | 0x80;

   116                     char c = decodeDouble(b1, b2);

   117                     if (c == replacement().charAt(0)) {

   118                         return CoderResult.unmappableForLength(2);

   119                     }

   120                     if (dl - dp < 1)

   121                         return CoderResult.OVERFLOW;

   122                     da[dp++] = c;

   123                     sp +=2;

   124                 }

   125                 return CoderResult.UNDERFLOW;

   126             } finally {

   127                 src.position(sp - src.arrayOffset());

   128                 dst.position(dp - dst.arrayOffset());

   129             }

   130 

   131         }

   132     }

   133 }