/* * Copyright (c) 2002, 2010, 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.ext; import java.nio.ByteBuffer;import java.nio.CharBuffer;import java.nio.charset.Charset;import java.nio.charset.CharsetDecoder;import java.nio.charset.CharsetEncoder;import java.nio.charset.CoderResult;import sun.nio.cs.HistoricallyNamedCharset;import sun.nio.cs.Surrogate; public class EUC_JP_LINUX    extends Charset    implements HistoricallyNamedCharset{    public EUC_JP_LINUX() {        super("x-euc-jp-linux", ExtendedCharsets.aliasesFor("x-euc-jp-linux"));    }     public String historicalName() {        return "EUC_JP_LINUX";    }     public boolean contains(Charset cs) {        return ((cs instanceof JIS_X_0201)               || (cs.name().equals("US-ASCII"))               || (cs instanceof EUC_JP_LINUX));    }     public CharsetDecoder newDecoder() {        return new Decoder(this);    }     public CharsetEncoder newEncoder() {        return new Encoder(this);    }     private static class Decoder extends CharsetDecoder {        JIS_X_0201.Decoder decoderJ0201;        protected final char REPLACE_CHAR='\uFFFD';         private static final int start = 0xa1;        private static final int end = 0xfe;        private static final short[] jis0208Index1 =            JIS_X_0208_Decoder.getIndex1();        private static final String[] jis0208Index2 =            JIS_X_0208_Decoder.getIndex2();         private Decoder(Charset cs) {            super(cs, 1.0f, 1.0f);            decoderJ0201 = new JIS_X_0201.Decoder(cs);        }         protected char convSingleByte(int b) {            if (b < 0 || b > 0x7f)                return REPLACE_CHAR;            return decoderJ0201.decode(b);        }         protected char decodeDouble(int byte1, int byte2) {            if (byte1 == 0x8e) {                return decoderJ0201.decode(byte2 - 256);            }             if (((byte1 < 0) || (byte1 > jis0208Index1.length))                || ((byte2 < start) || (byte2 > end)))                return REPLACE_CHAR;             int n = (jis0208Index1[byte1 - 0x80] & 0xf) * (end - start + 1)                    + (byte2 - start);            return jis0208Index2[jis0208Index1[byte1 - 0x80] >> 4].charAt(n);        }         private CoderResult decodeArrayLoop(ByteBuffer src,                                            CharBuffer dst)        {            byte[] sa = src.array();            int sp = src.arrayOffset() + src.position();            int sl = src.arrayOffset() + src.limit();            assert (sp <= sl);            sp = (sp <= sl ? sp : sl);             char[] da = dst.array();            int dp = dst.arrayOffset() + dst.position();            int dl = dst.arrayOffset() + dst.limit();            assert (dp <= dl);            dp = (dp <= dl ? dp : dl);             int b1 = 0, b2 = 0;            int inputSize = 0;            char outputChar = REPLACE_CHAR; // U+FFFD;             try {                while (sp < sl) {                    b1 = sa[sp] & 0xff;                    inputSize = 1;                    if ((b1 & 0x80) == 0) {                        outputChar = (char)b1;                    }                    else {      // Multibyte char                        if ((b1 & 0xff) == 0x8f) {   // JIS0212                            if (sp + 3 > sl)                               return CoderResult.UNDERFLOW;                            inputSize = 3;                            return CoderResult.unmappableForLength(inputSize); // substitute                        } else {                          // JIS0208                            if (sp + 2 > sl)                               return CoderResult.UNDERFLOW;                            b2 = sa[sp + 1] & 0xff;                            inputSize = 2;                            outputChar = decodeDouble(b1, b2);                        }                    }                    if (outputChar == REPLACE_CHAR) { // can't be decoded                        return CoderResult.unmappableForLength(inputSize);                    }                    if (dp + 1 > dl)                        return CoderResult.OVERFLOW;                    da[dp++] = outputChar;                    sp += inputSize;                }                return CoderResult.UNDERFLOW;            } finally {                src.position(sp - src.arrayOffset());                dst.position(dp - dst.arrayOffset());            }        }         private CoderResult decodeBufferLoop(ByteBuffer src,                                             CharBuffer dst)        {            int mark = src.position();            char outputChar = REPLACE_CHAR; // U+FFFD;             try {                while (src.hasRemaining()) {                    int b1 = src.get() & 0xff;                    int inputSize = 1;                     if ((b1 & 0x80) == 0) {                        outputChar = (char)b1;                    } else {    // Multibyte char                         if ((b1 & 0xff) == 0x8f) { // JIS0212 not supported                            if (src.remaining() < 2)                                return CoderResult.UNDERFLOW;                            return CoderResult.unmappableForLength(3);                        } else {                            // JIS0208                            if (src.remaining() < 1)                                return CoderResult.UNDERFLOW;                            int b2 = src.get() & 0xff;                            inputSize++;                            outputChar = decodeDouble(b1, b2);                        }                    }                     if (outputChar == REPLACE_CHAR)                        return CoderResult.unmappableForLength(inputSize);                    if (dst.remaining() < 1)                        return CoderResult.OVERFLOW;                    dst.put(outputChar);                    mark += inputSize;                }                return CoderResult.UNDERFLOW;            } finally {                src.position(mark);            }        }         protected CoderResult decodeLoop(ByteBuffer src,                                         CharBuffer dst)        {            if (src.hasArray() && dst.hasArray())                return decodeArrayLoop(src, dst);            else                return decodeBufferLoop(src, dst);        }    }      private static class Encoder extends CharsetEncoder {         JIS_X_0201.Encoder encoderJ0201;         private final Surrogate.Parser sgp = new Surrogate.Parser();        private static final short[] jis0208Index1 =            JIS_X_0208_Encoder.getIndex1();        private static final String[] jis0208Index2 =            JIS_X_0208_Encoder.getIndex2();         private Encoder(Charset cs) {            super(cs, 2.0f, 2.0f);            encoderJ0201 = new JIS_X_0201.Encoder(cs);        }         public boolean canEncode(char c) {            byte[]  encodedBytes = new byte[2];             if (encodeSingle(c, encodedBytes) == 0) { //doublebyte                if (encodeDouble(c) == 0)                    return false;            }            return true;        }         protected int encodeSingle(char inputChar, byte[] outputByte) {            byte b;             if (inputChar == 0) {                outputByte[0] = (byte)0;                return 1;            }             if ((b = encoderJ0201.encode(inputChar)) == 0)                return 0;             if (b > 0 && b < 128) {                outputByte[0] = b;                return 1;            }            outputByte[0] = (byte)0x8e;            outputByte[1] = b;            return 2;        }         protected int encodeDouble(char ch) {            int offset = jis0208Index1[((ch & 0xff00) >> 8 )] << 8;            int r = jis0208Index2[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff));            if (r != 0)                return r + 0x8080;            return r;        }         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);             final byte[]  outputByte = new byte[2];             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();                    }                     int outputSize = encodeSingle(c, outputByte);                    if (outputSize == 0) { // DoubleByte                        int ncode = encodeDouble(c);                        if (ncode != 0 && ((ncode & 0xFF0000) == 0)) {                                outputByte[0] = (byte) ((ncode & 0xff00) >> 8);                                outputByte[1] = (byte) (ncode & 0xff);                                outputSize = 2;                        } else {                                return CoderResult.unmappableForLength(1);                        }                    }                     if (dl - dp < outputSize)                        return CoderResult.OVERFLOW;                    // Put the byte in the output buffer                    for (int i = 0; i < outputSize; i++) {                        da[dp++] = outputByte[i];                    }                    sp++;                }                return CoderResult.UNDERFLOW;            } finally {                src.position(sp - src.arrayOffset());                dst.position(dp - dst.arrayOffset());            }        }         private CoderResult encodeBufferLoop(CharBuffer src,                                             ByteBuffer dst)        {            final byte[]  outputByte = new byte[4];            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();                    }                     int outputSize = encodeSingle(c, outputByte);                    if (outputSize == 0) { // DoubleByte                        int ncode = encodeDouble(c);                        if (ncode != 0 ) {                            if ((ncode & 0xFF0000) == 0) {                                outputByte[0] = (byte) ((ncode & 0xff00) >> 8);                                outputByte[1] = (byte) (ncode & 0xff);                                outputSize = 2;                            }                        } else {                                return CoderResult.unmappableForLength(1);                        }                    }                     if (dst.remaining() < outputSize)                        return CoderResult.OVERFLOW;                     // Put the byte in the output buffer                    for (int i = 0; i < outputSize; i++) {                        dst.put(outputByte[i]);                    }                    mark++;                }                return CoderResult.UNDERFLOW;            } finally {                src.position(mark);            }        }         protected CoderResult encodeLoop(CharBuffer src,                                         ByteBuffer dst)        {            if (src.hasArray() && dst.hasArray())                return encodeArrayLoop(src, dst);            else                return encodeBufferLoop(src, dst);        }    }}