/* * Copyright (c) 2000, 2004, 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.nio.cs; import java.nio.ByteBuffer;import java.nio.CharBuffer;import java.nio.charset.Charset;import java.nio.charset.CharsetEncoder;import java.nio.charset.CoderResult;import java.nio.charset.CharacterCodingException;import java.nio.charset.MalformedInputException;import java.nio.charset.UnmappableCharacterException;import sun.nio.cs.Surrogate;  public abstract class SingleByteEncoder    extends CharsetEncoder{     private final short index1[];    private final String index2;    private final int mask1;    private final int mask2;    private final int shift;     private final Surrogate.Parser sgp = new Surrogate.Parser();     protected SingleByteEncoder(Charset cs,                                short[] index1, String index2,                                int mask1, int mask2, int shift)    {        super(cs, 1.0f, 1.0f);        this.index1 = index1;        this.index2 = index2;        this.mask1 = mask1;        this.mask2 = mask2;        this.shift = shift;    }     public boolean canEncode(char c) {        char testEncode = index2.charAt(index1[(c & mask1) >> shift]                                        + (c & mask2));        return testEncode != '\u0000' || c == '\u0000';    }     private CoderResult encodeArrayLoop(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 (Character.isSurrogate(c)) {                    if (sgp.parse(c, sa, sp, sl) < 0)                        return sgp.error();                    return sgp.unmappableResult();                }                if (c >= '\uFFFE')                    return CoderResult.unmappableForLength(1);                if (dl - dp < 1)                    return CoderResult.OVERFLOW;                 char e = index2.charAt(index1[(c & mask1) >> shift]                                       + (c & mask2));                 // If output byte is zero because input char is zero                // then character is mappable, o.w. fail                if (e == '\u0000' && c != '\u0000')                    return CoderResult.unmappableForLength(1);                 sp++;                da[dp++] = (byte)e;            }            return CoderResult.UNDERFLOW;        } finally {            src.position(sp - src.arrayOffset());            dst.position(dp - dst.arrayOffset());        }    }     private CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) {        int mark = src.position();        try {            while (src.hasRemaining()) {                char c = src.get();                if (Character.isSurrogate(c)) {                    if (sgp.parse(c, src) < 0)                        return sgp.error();                    return sgp.unmappableResult();                }                if (c >= '\uFFFE')                    return CoderResult.unmappableForLength(1);                if (!dst.hasRemaining())                    return CoderResult.OVERFLOW;                 char e = index2.charAt(index1[(c & mask1) >> shift]                                       + (c & mask2));                 // If output byte is zero because input char is zero                // then character is mappable, o.w. fail                if (e == '\u0000' && c != '\u0000')                    return CoderResult.unmappableForLength(1);                 mark++;                dst.put((byte)e);            }            return CoderResult.UNDERFLOW;        } finally {            src.position(mark);        }    }     protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {        if (true && src.hasArray() && dst.hasArray())            return encodeArrayLoop(src, dst);        else            return encodeBufferLoop(src, dst);    }     public byte encode(char inputChar) {        return (byte)index2.charAt(index1[(inputChar & mask1) >> shift] +                (inputChar & mask2));    }}