| /* |
| * 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; |
| |
| import sun.nio.cs.ext.DoubleByte; |
| import static sun.nio.cs.CharsetMapping.*; |
| |
| public abstract class ByteToCharEUC2 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; |
| |
| private DoubleByte.Decoder dec; |
| |
| public ByteToCharEUC2(DoubleByte.Decoder dec) { |
| super(); |
| state = G0; |
| this.dec = dec; |
| } |
| |
| char decodeSingle(int b) { |
| return dec.decodeSingle(b); |
| } |
| |
| char decodeDouble(int b1, int b2) { |
| return dec.decodeDouble(b1, b2); |
| } |
| |
| /** |
| * 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 = UNMAPPABLE_DECODING; |
| byteOff = inOff; |
| charOff = outOff; |
| |
| while (byteOff < inEnd) { |
| byte1 = input[byteOff] & 0xff; |
| 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 = decodeSingle(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 = decodeDouble(firstByte, byte1); |
| break; |
| } |
| if (state == G0) { |
| if (outputChar == UNMAPPABLE_DECODING) { |
| if (subMode) |
| outputChar = subChars[0]; |
| else { |
| badInputLength = 1; |
| throw new UnknownCharacterException(); |
| } |
| } |
| if (charOff >= outEnd) |
| throw new ConversionBufferFullException(); |
| output[charOff++] = outputChar; |
| } |
| byteOff++; |
| } |
| return charOff - outOff; |
| } |
| } |