/* * Copyright (c) 1997, 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.io; /*** @author Malcolm Ayres*/public abstract class ByteToCharEUC extends ByteToCharConverter{    private final int G0 = 0;    private final int G1 = 1;    private final int SS2 =  0x8E;    private final int SS3 =  0x8F;     private int firstByte, state;     protected String  mappingTableG1;    protected String  byteToCharTable;      public ByteToCharEUC() {        super();        state = G0;    }     /**      * flush out any residual data and reset the buffer state      */    public int flush(char[] output, int outStart, int outEnd)       throws MalformedInputException    {       if (state != G0) {          reset();          badInputLength = 0;          throw new MalformedInputException();       }        reset();       return 0;    }     /**     *  Resets the converter.     */    public void reset() {       state = G0;       charOff = byteOff = 0;    }     /**     * Character conversion     */    public int convert(byte[] input, int inOff, int inEnd,                       char[] output, int outOff, int outEnd)        throws UnknownCharacterException, MalformedInputException,               ConversionBufferFullException    {        int       byte1;       char      outputChar = '\uFFFD';        byteOff = inOff;       charOff = outOff;        while (byteOff < inEnd) {           byte1 = input[byteOff];          if (byte1 < 0)             byte1 += 256;           switch (state) {             case G0:                if (byte1 == SS2 ||                // no general support                    byte1 == SS3 ) {               //    for g2 or g3                   badInputLength = 1;                   throw new MalformedInputException();                }                 if ( byte1 <= 0x9f )               // < 0x9f has its own table                   outputChar = byteToCharTable.charAt(byte1);                else                   if (byte1 < 0xa1 || byte1 > 0xfe) {  // byte within range?                      badInputLength = 1;                      throw new MalformedInputException();                   } else {                       // G1 set first byte                      firstByte = byte1;                      state = G1;                   }                break;              case G1:                 state = G0;                if ( byte1 < 0xa1 || byte1 > 0xfe) {  // valid G1 set second byte                   badInputLength = 1;                   throw new MalformedInputException();                }                 outputChar = mappingTableG1.charAt(((firstByte - 0xa1) * 94) + byte1 - 0xa1);                break;           }           if (state == G0) {             if (outputChar == '\uFFFD') {                if (subMode)                   outputChar = subChars[0];                else {                   badInputLength = 1;                   throw new UnknownCharacterException();                }             }              if (charOff >= outEnd)                throw new ConversionBufferFullException();              output[charOff++] = outputChar;          }           byteOff++;        }        return charOff - outOff;    } }