191 lines · 8.6 KB · Java
RawDownload
/* * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.awt; import java.nio.ByteBuffer;import java.nio.CharBuffer;import java.nio.charset.*; public class Symbol extends Charset {    public Symbol () {        super("Symbol", null);    }    public CharsetEncoder newEncoder() {        return new Encoder(this);    }     /* Seems like supporting a decoder is required, but we aren't going     * to be publically exposing this class, so no need to waste work     */    public CharsetDecoder newDecoder() {        throw new Error("Decoder is not implemented for Symbol Charset");    }     public boolean contains(Charset cs) {        return cs instanceof Symbol;    }     private static class Encoder extends CharsetEncoder {        public Encoder(Charset cs) {            super(cs, 1.0f, 1.0f);        }         public boolean canEncode(char c) {            if (c >= 0x2200 && c <= 0x22ef) {                if (table_math[c - 0x2200] != 0x00) {                    return true;                }            } else if (c >= 0x0391 && c <= 0x03d6) {                if (table_greek[c - 0x0391] != 0x00) {                    return true;                }            }            return false;        }         protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {            char[] sa = src.array();            int sp = src.arrayOffset() + src.position();            int sl = src.arrayOffset() + src.limit();            assert (sp <= sl);            sp = (sp <= sl ? sp : sl);            byte[] da = dst.array();            int dp = dst.arrayOffset() + dst.position();            int dl = dst.arrayOffset() + dst.limit();            assert (dp <= dl);            dp = (dp <= dl ? dp : dl);             try {                while (sp < sl) {                    char c = sa[sp];                    if (dl - dp < 1)                        return CoderResult.OVERFLOW;                    if (!canEncode(c))                        return CoderResult.unmappableForLength(1);                    sp++;                    if (c >= 0x2200 && c <= 0x22ef){                        da[dp++] = table_math[c - 0x2200];                    } else if (c >= 0x0391 && c <= 0x03d6) {                        da[dp++]= table_greek[c - 0x0391];                    }                }                return CoderResult.UNDERFLOW;            } finally {                src.position(sp - src.arrayOffset());                dst.position(dp - dst.arrayOffset());            }        }         private static byte[] table_math = {            (byte)0042, (byte)0000, (byte)0144, (byte)0044,            (byte)0000, (byte)0306, (byte)0104, (byte)0321,    // 00            (byte)0316, (byte)0317, (byte)0000, (byte)0000,            (byte)0000, (byte)0047, (byte)0000, (byte)0120,            (byte)0000, (byte)0345, (byte)0055, (byte)0000,            (byte)0000, (byte)0244, (byte)0000, (byte)0052,    // 10            (byte)0260, (byte)0267, (byte)0326, (byte)0000,            (byte)0000, (byte)0265, (byte)0245, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0275,            (byte)0000, (byte)0000, (byte)0000, (byte)0331,    // 20            (byte)0332, (byte)0307, (byte)0310, (byte)0362,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0134, (byte)0000, (byte)0000, (byte)0000,    // 30            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0176, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0100, (byte)0000, (byte)0000,    // 40            (byte)0273, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,    // 50            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0271, (byte)0272, (byte)0000, (byte)0000,            (byte)0243, (byte)0263, (byte)0000, (byte)0000,    // 60            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,    // 70            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0314, (byte)0311,            (byte)0313, (byte)0000, (byte)0315, (byte)0312,    // 80            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0305, (byte)0000, (byte)0304,    // 90            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0136, (byte)0000, (byte)0000,    // a0            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,    // b0            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0340, (byte)0327, (byte)0000, (byte)0000,    // c0            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,    // d0            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,    // e0            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0274,        };         private static byte[] table_greek = {            (byte)0101, (byte)0102, (byte)0107,            (byte)0104, (byte)0105, (byte)0132, (byte)0110,    // 90            (byte)0121, (byte)0111, (byte)0113, (byte)0114,            (byte)0115, (byte)0116, (byte)0130, (byte)0117,            (byte)0120, (byte)0122, (byte)0000, (byte)0123,            (byte)0124, (byte)0125, (byte)0106, (byte)0103,    // a0            (byte)0131, (byte)0127, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0141, (byte)0142, (byte)0147,            (byte)0144, (byte)0145, (byte)0172, (byte)0150,    // b0            (byte)0161, (byte)0151, (byte)0153, (byte)0154,            (byte)0155, (byte)0156, (byte)0170, (byte)0157,            (byte)0160, (byte)0162, (byte)0126, (byte)0163,            (byte)0164, (byte)0165, (byte)0146, (byte)0143,    // c0            (byte)0171, (byte)0167, (byte)0000, (byte)0000,            (byte)0000, (byte)0000, (byte)0000, (byte)0000,            (byte)0000, (byte)0112, (byte)0241, (byte)0000,            (byte)0000, (byte)0152, (byte)0166,                // d0        };         /* The default implementation creates a decoder and we don't have one */        public boolean isLegalReplacement(byte[] repl) {            return true;        }    }}