/* * Copyright (c) 2001, 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.GB18030; public class CharToByteGB18030 extends CharToByteConverter{     private char highHalfZoneCode;    boolean flushed = true;     private final static int GB18030_SINGLE_BYTE = 1;    private final static int GB18030_DOUBLE_BYTE = 2;    private final static int GB18030_FOUR_BYTE = 3;    private static short[] index1;    private static String[] index2;    private int currentState;     public CharToByteGB18030() {        GB18030 nioCoder = new GB18030();        currentState = GB18030_DOUBLE_BYTE;        subBytes = new byte[1];        subBytes[0] = (byte)'?';        index1 = nioCoder.getEncoderIndex1();        index2 = nioCoder.getEncoderIndex2();    }     public int flush(byte[] output, int outStart, int outEnd)        throws MalformedInputException    {        if (highHalfZoneCode != 0) {            highHalfZoneCode = 0;            badInputLength = 0;            throw new MalformedInputException();        }        reset();        flushed = true;        return 0;    }     public void reset() {        byteOff = charOff = 0;        currentState = GB18030_DOUBLE_BYTE;    }     public boolean canConvert(char c) {        // converts all but unpaired surrogates        // and illegal chars, U+FFFE & U+FFFF         if ((c >= 0xd800 && c <=0xdfff) || (c >= 0xfffe))            return false;        else            return true;    }     /**     * Character conversion     */    public int convert(char[] input, int inOff, int inEnd,                       byte[] output, int outOff, int outEnd)        throws UnknownCharacterException, MalformedInputException,               ConversionBufferFullException    {        int linearDiffValue = 0;        int hiByte = 0 , loByte = 0;  // low and high order bytes        char inputChar;  // Input character to be converted        charOff = inOff;        byteOff = outOff;        int inputSize;  // Size of the input        int outputSize; // Size of the output         flushed = false;         if (highHalfZoneCode != 0) {            if (input[inOff] >= 0xDC00 && input[inOff] <= 0xDFFF) {                 // This is legal UTF16 sequence, so shunt in the high                // surrogate for conversion by convert() loop.                 char[] newBuf = new char[inEnd - inOff + 1];                newBuf[0] = highHalfZoneCode;                System.arraycopy(input, inOff, newBuf, 1, inEnd - inOff);                charOff -= 1;                input = newBuf;                inOff = 0;                inEnd = newBuf.length;                highHalfZoneCode = 0;            } else {                // This is illegal UTF16 sequence.                badInputLength = 0;                throw new MalformedInputException();            }        }         // Main encode loop         while (charOff < inEnd) {            inputChar = input[charOff++];             if(inputChar >= '\uD800' && inputChar <= '\uDBFF') {                // Is this the last character of the input?                if (charOff + 1 > inEnd) {                    highHalfZoneCode = inputChar;                    break;                }                 char previousChar = inputChar;                inputChar = input[charOff];                 // Is there a low surrogate following?                if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {                    inputSize = 2;                    charOff++;                    linearDiffValue = ( previousChar - 0xD800) * 0x400 +                                ( inputChar - 0xDC00) + 0x2E248;                     currentState = GB18030_FOUR_BYTE;                } else {                    // We have a malformed surrogate pair                    badInputLength = 1;                    throw new MalformedInputException();                }            }            // Is this an unaccompanied low surrogate?            else if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {                badInputLength = 1;                throw new MalformedInputException();            }             // Not part of a surrogate            else if (inputChar >= 0x0000 && inputChar <= 0x007F) {                if (byteOff >= outEnd) {                   throw new ConversionBufferFullException();                }                currentState = GB18030_SINGLE_BYTE;                output[byteOff++] = (byte) inputChar;            }            else if (inputChar <= 0xA4C6 || inputChar >= 0xE000) {                int outByteVal = getGB18030(index1, index2, inputChar);                 if (outByteVal == 0xFFFD ) {                    if (subMode) {                        if (byteOff >= outEnd) {                           throw new ConversionBufferFullException();                        } else {                            output[byteOff++] = subBytes[0];                            continue;                        }                    } else {                        badInputLength = 1;                        throw new UnknownCharacterException();                    }                }                 hiByte = (outByteVal & 0xFF00) >> 8;                loByte = (outByteVal & 0xFF);                 linearDiffValue = (hiByte - 0x20) * 256 + loByte;                 if (inputChar >= 0xE000 && inputChar < 0xF900)                        linearDiffValue += 0x82BD;                else if (inputChar >= 0xF900)                        linearDiffValue += 0x93A9;                 if (hiByte > 0x80)                     currentState = GB18030_DOUBLE_BYTE;                else                     currentState = GB18030_FOUR_BYTE;            }            else if (inputChar >= 0xA4C7 && inputChar <= 0xD7FF) {                linearDiffValue = inputChar - 0x5543;                currentState = GB18030_FOUR_BYTE;            }            else {                badInputLength = 1;                throw new MalformedInputException();            }             if (currentState == GB18030_SINGLE_BYTE)                continue;             if (currentState == GB18030_DOUBLE_BYTE) {                if (byteOff + 2 > outEnd) {                    throw new ConversionBufferFullException();                }                output[byteOff++] = (byte)hiByte;                output[byteOff++] = (byte)loByte;            }            else { // Four Byte encoding                if (byteOff + 4 > outEnd) {                    throw new ConversionBufferFullException();                }                 byte b1, b2, b3, b4;                 b4 = (byte)((linearDiffValue % 10) + 0x30);                linearDiffValue /= 10;                b3 = (byte)((linearDiffValue % 126) + 0x81);                linearDiffValue /= 126;                b2 = (byte)((linearDiffValue % 10) + 0x30);                b1 = (byte)((linearDiffValue / 10) + 0x81);                output[byteOff++] = b1;                output[byteOff++] = b2;                output[byteOff++] = b3;                output[byteOff++] = b4;            }        }        // Return number of bytes written to the output buffer.        return byteOff - outOff;    }      /**     * returns the maximum number of bytes needed to convert a char     */    public int getMaxBytesPerChar() {        return 4;    }      /**     * Return the character set ID     */    public String getCharacterEncoding() {        return "GB18030";    }     private int getGB18030(short[] outerIndex, String[] innerIndex, char ch) {        int offset = outerIndex[((ch & 0xff00) >> 8 )] << 8;         return innerIndex[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff));    } }