J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.motif; |
| 27 | |
| 28 | import java.nio.CharBuffer; |
| 29 | import java.nio.ByteBuffer; |
| 30 | import java.nio.charset.*; |
| 31 | import sun.nio.cs.ext.EUC_TW; |
| 32 | |
| 33 | public abstract class X11CNS11643 extends Charset { |
| 34 | private final int plane; |
| 35 | public X11CNS11643 (int plane, String name) { |
| 36 | super(name, null); |
| 37 | switch (plane) { |
| 38 | case 1: |
| 39 | this.plane = 0; // CS1 |
| 40 | break; |
| 41 | case 2: |
| 42 | case 3: |
| 43 | this.plane = plane; |
| 44 | break; |
| 45 | default: |
| 46 | throw new IllegalArgumentException |
| 47 | ("Only planes 1, 2, and 3 supported"); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | public CharsetEncoder newEncoder() { |
| 52 | return new Encoder(this, plane); |
| 53 | } |
| 54 | |
| 55 | public CharsetDecoder newDecoder() { |
| 56 | return new Decoder(this, plane); |
| 57 | } |
| 58 | |
| 59 | public boolean contains(Charset cs) { |
| 60 | return cs instanceof X11CNS11643; |
| 61 | } |
| 62 | |
| 63 | private class Encoder extends EUC_TW.Encoder { |
| 64 | private int plane; |
| 65 | public Encoder(Charset cs, int plane) { |
| 66 | super(cs); |
| 67 | this.plane = plane; |
| 68 | } |
| 69 | public boolean canEncode(char c) { |
| 70 | if (c <= 0x7F) { |
| 71 | return false; |
| 72 | } |
| 73 | int p = getNative(c) >> 16; |
| 74 | if (p == 1 && plane == 0 || |
| 75 | p == 2 && plane == 2 || |
| 76 | p == 3 && plane == 3) |
| 77 | return true; |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | public boolean isLegalReplacement(byte[] repl) { |
| 82 | return true; |
| 83 | } |
| 84 | |
| 85 | protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
| 86 | char[] sa = src.array(); |
| 87 | int sp = src.arrayOffset() + src.position(); |
| 88 | int sl = src.arrayOffset() + src.limit(); |
| 89 | byte[] da = dst.array(); |
| 90 | int dp = dst.arrayOffset() + dst.position(); |
| 91 | int dl = dst.arrayOffset() + dst.limit(); |
| 92 | |
| 93 | try { |
| 94 | while (sp < sl) { |
| 95 | char c = sa[sp]; |
| 96 | if (c >= '\uFFFE' || c <= '\u007f') |
| 97 | return CoderResult.unmappableForLength(1); |
| 98 | int cns = getNative(c); |
| 99 | int p = cns >> 16; |
| 100 | if (p == 1 && plane == 0 || |
| 101 | p == 2 && plane == 2 || |
| 102 | p == 3 && plane == 3) { |
| 103 | if (dl - dp < 2) |
| 104 | return CoderResult.OVERFLOW; |
| 105 | da[dp++] = (byte) ((cns >> 8) & 0x7f); |
| 106 | da[dp++] = (byte) (cns & 0x7f); |
| 107 | sp++; |
| 108 | continue; |
| 109 | } |
| 110 | return CoderResult.unmappableForLength(1); |
| 111 | } |
| 112 | return CoderResult.UNDERFLOW; |
| 113 | } finally { |
| 114 | src.position(sp - src.arrayOffset()); |
| 115 | dst.position(dp - dst.arrayOffset()); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | private class Decoder extends EUC_TW.Decoder { |
| 121 | private String table; |
| 122 | protected Decoder(Charset cs, int plane) { |
| 123 | super(cs); |
| 124 | switch (plane) { |
| 125 | case 0: |
| 126 | table = unicodeCNS1; |
| 127 | break; |
| 128 | case 2: |
| 129 | table = unicodeCNS2; |
| 130 | break; |
| 131 | case 3: |
| 132 | table = unicodeCNS3; |
| 133 | break; |
| 134 | default: |
| 135 | throw new IllegalArgumentException |
| 136 | ("Only planes 1, 2, and 3 supported"); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | //we only work on array backed buffer. |
| 141 | protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) { |
| 142 | byte[] sa = src.array(); |
| 143 | int sp = src.arrayOffset() + src.position(); |
| 144 | int sl = src.arrayOffset() + src.limit(); |
| 145 | assert (sp <= sl); |
| 146 | sp = (sp <= sl ? sp : sl); |
| 147 | |
| 148 | char[] da = dst.array(); |
| 149 | int dp = dst.arrayOffset() + dst.position(); |
| 150 | int dl = dst.arrayOffset() + dst.limit(); |
| 151 | assert (dp <= dl); |
| 152 | dp = (dp <= dl ? dp : dl); |
| 153 | |
| 154 | try { |
| 155 | while (sp < sl) { |
| 156 | if ( sl - sp < 2) { |
| 157 | return CoderResult.UNDERFLOW; |
| 158 | } |
| 159 | byte b1 = sa[sp]; |
| 160 | byte b2 = sa[sp + 1]; |
| 161 | char c = convToUnicode((byte)(b1 | 0x80), |
| 162 | (byte)(b2 | 0x80), |
| 163 | table); |
| 164 | if (c == replacement().charAt(0) |
| 165 | //to keep the compatibility with b2cX11CNS11643 |
| 166 | /*|| c == '\u0000'*/) { |
| 167 | return CoderResult.unmappableForLength(2); |
| 168 | } |
| 169 | if (dl - dp < 1) |
| 170 | return CoderResult.OVERFLOW; |
| 171 | da[dp++] = c; |
| 172 | sp +=2; |
| 173 | } |
| 174 | return CoderResult.UNDERFLOW; |
| 175 | } finally { |
| 176 | src.position(sp - src.arrayOffset()); |
| 177 | dst.position(dp - dst.arrayOffset()); |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | } |