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 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.*; 32 import sun.nio.cs.ext.*; 33 import static sun.nio.cs.CharsetMapping.*; 34 35 public class X11GB2312 extends Charset { 36 public X11GB2312 () { 37 super("X11GB2312", null); 38 } 39 public CharsetEncoder newEncoder() { 40 return new Encoder(this); 41 } 42 public CharsetDecoder newDecoder() { 43 return new Decoder(this); 44 } 45 46 public boolean contains(Charset cs) { 47 return cs instanceof X11GB2312; 48 } 49 50 private class Encoder extends CharsetEncoder { 51 private DoubleByte.Encoder enc = (DoubleByte.Encoder)new EUC_CN().newEncoder(); 52 53 public Encoder(Charset cs) { 54 super(cs, 2.0f, 2.0f); 55 } 56 57 public boolean canEncode(char c) { 58 if (c <= 0x7F) { 59 return false; 60 } 61 return enc.canEncode(c); 62 } 63 64 protected int encodeDouble(char c) { 65 return enc.encodeChar(c); 66 } 67 68 protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { 69 char[] sa = src.array(); 70 int sp = src.arrayOffset() + src.position(); 71 int sl = src.arrayOffset() + src.limit(); 72 73 byte[] da = dst.array(); 74 int dp = dst.arrayOffset() + dst.position(); 75 int dl = dst.arrayOffset() + dst.limit(); 76 77 try { 78 while (sp < sl) { 79 char c = sa[sp]; 80 if (c <= '\u007f') 81 return CoderResult.unmappableForLength(1); 82 int ncode = encodeDouble(c); 83 if (ncode != 0 && c != '\u0000' ) { 84 da[dp++] = (byte) ((ncode >> 8) & 0x7f); 85 da[dp++] = (byte) (ncode & 0x7f); 86 sp++; 87 continue; 88 } 89 return CoderResult.unmappableForLength(1); 90 } 91 return CoderResult.UNDERFLOW; 92 } finally { 93 src.position(sp - src.arrayOffset()); 94 dst.position(dp - dst.arrayOffset()); 95 } 96 } 97 public boolean isLegalReplacement(byte[] repl) { 98 return true; 99 } 100 } 101 102 private class Decoder extends CharsetDecoder { 103 private DoubleByte.Decoder dec = (DoubleByte.Decoder)new EUC_CN().newDecoder(); 104 105 public Decoder(Charset cs) { 106 super(cs, 0.5f, 1.0f); 107 } 108 109 protected char decodeDouble(int b1, int b2) { 110 return dec.decodeDouble(b1, b2); 111 } 112 113 protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) { 114 byte[] sa = src.array(); 115 int sp = src.arrayOffset() + src.position(); 116 int sl = src.arrayOffset() + src.limit(); 117 assert (sp <= sl); 118 sp = (sp <= sl ? sp : sl); 119 char[] da = dst.array(); 120 int dp = dst.arrayOffset() + dst.position(); 121 int dl = dst.arrayOffset() + dst.limit(); 122 assert (dp <= dl); 123 dp = (dp <= dl ? dp : dl); 124 125 try { 126 while (sp < sl) { 127 if ( sl - sp < 2) { 128 return CoderResult.UNDERFLOW; 129 } 130 int b1 = sa[sp] & 0xFF | 0x80; 131 int b2 = sa[sp + 1] & 0xFF | 0x80; 132 char c = decodeDouble(b1, b2); 133 if (c == UNMAPPABLE_DECODING) { 134 return CoderResult.unmappableForLength(2); 135 } 136 if (dl - dp < 1) 137 return CoderResult.OVERFLOW; 138 da[dp++] = c; 139 sp +=2; 140 } 141 return CoderResult.UNDERFLOW; 142 } finally { 143 src.position(sp - src.arrayOffset()); 144 dst.position(dp - dst.arrayOffset()); 145 } 146 147 } 148 } 149 150 }