| /* |
| * Copyright (c) 1997, 2003, 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; |
| |
| import sun.nio.cs.ext.IBM33722; |
| |
| /** |
| * @author Malcolm Ayres |
| */ |
| public class ByteToCharCp33722 extends ByteToCharConverter |
| { |
| private final int G0 = 0; |
| private final int G1 = 1; |
| private final int G2 = 2; |
| private final int G3 = 3; |
| private final int G4 = 4; |
| private final int SS2 = 0x8E; |
| private final int SS3 = 0x8F; |
| |
| private int firstByte, state; |
| private String byteToCharTable; |
| private String mappingTableG1; |
| private String mappingTableG2; |
| private String mappingTableG3; |
| |
| private final static IBM33722 nioCoder = new IBM33722(); |
| |
| public ByteToCharCp33722() { |
| super(); |
| state = G0; |
| byteToCharTable = nioCoder.getDecoderSingleByteMappings(); |
| mappingTableG1 = nioCoder.getDecoderMappingTableG1(); |
| mappingTableG2 = nioCoder.getDecoderMappingTableG2(); |
| mappingTableG3 = nioCoder.getDecoderMappingTableG3(); |
| } |
| |
| /** |
| * Return the character set id |
| */ |
| public String getCharacterEncoding() |
| { |
| return "Cp33722"; |
| } |
| |
| /** |
| * 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) // drop into G2 set |
| state = G2; |
| else if (byte1 == SS3) // drop into G3 set |
| state = G3; |
| else if ( byte1 <= 0x9f ) // valid single byte |
| outputChar = byteToCharTable.charAt(byte1); |
| else if (byte1 < 0xa1 || byte1 > 0xfe) { // valid G1 set 1st byte |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } else { |
| firstByte = byte1; // save the 1st byte |
| state = G1; |
| } |
| break; |
| |
| case G1: |
| state = G0; |
| if ( byte1 < 0xa1 || byte1 > 0xfe) { // valid second byte for G1 |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| outputChar = mappingTableG1.charAt(((firstByte - 0xa1) * 94) + byte1 - 0xa1); |
| break; |
| |
| case G2: |
| state = G0; // valid first byte for G2 |
| if ( byte1 < 0xa1 || byte1 > 0xfe) { |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| outputChar = mappingTableG2.charAt(byte1 - 0xa1); |
| break; |
| |
| case G3: |
| if ( byte1 < 0xa1 || byte1 > 0xfe) { // valid first byte for G3 |
| state = G0; |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| firstByte = byte1; |
| state = G4; |
| break; |
| |
| case G4: |
| state = G0; // valid second byte for G3 |
| if ( byte1 < 0xa1 || byte1 > 0xfe) { |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| outputChar = mappingTableG3.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; |
| |
| } |
| } |