| /* |
| * Copyright 1997-2003 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| package sun.io; |
| |
| import sun.nio.cs.ext.IBM949; |
| |
| /** |
| * @author Malcolm Ayres |
| */ |
| |
| public class CharToByteCp949 extends CharToByteConverter |
| { |
| private static final char SBase = '\uAC00'; |
| private static final char LBase = '\u1100'; |
| private static final char VBase = '\u1161'; |
| private static final char TBase = '\u11A7'; |
| private static final int VCount = 21; |
| private static final int TCount = 28; |
| private static final byte G0 = 0; |
| private static final byte G1 = 1; |
| private static final byte G2 = 2; |
| private static final byte G3 = 3; |
| private byte charState = G0; |
| private char l, v, t; |
| |
| private byte[] outputByte; |
| |
| private char highHalfZoneCode; |
| private int mask1; |
| private int mask2; |
| private int shift; |
| private short[] index1; |
| private String index2; |
| private String index2a; |
| |
| private final static IBM949 nioCoder = new IBM949(); |
| |
| public CharToByteCp949() { |
| super(); |
| highHalfZoneCode = 0; |
| outputByte = new byte[2]; |
| mask1 = 0xFFF8; |
| mask2 = 0x0007; |
| shift = 3; |
| index1 = nioCoder.getEncoderIndex1(); |
| index2 = nioCoder.getEncoderIndex2(); |
| index2a = nioCoder.getEncoderIndex2a(); |
| } |
| |
| /** |
| * flush out any residual data and reset the buffer state |
| */ |
| public int flush(byte[] output, int outStart, int outEnd) |
| throws MalformedInputException, |
| ConversionBufferFullException |
| { |
| int bytesOut; |
| |
| byteOff = outStart; |
| |
| if (highHalfZoneCode != 0) { |
| reset(); |
| badInputLength = 0; |
| throw new MalformedInputException(); |
| } |
| |
| if (charState != G0) { |
| try { |
| unicodeToBuffer(composeHangul() ,output, outEnd); |
| } |
| catch(UnknownCharacterException e) { |
| reset(); |
| badInputLength = 0; |
| throw new MalformedInputException(); |
| } |
| charState = G0; |
| } |
| |
| bytesOut = byteOff - outStart; |
| |
| reset(); |
| return bytesOut; |
| } |
| |
| /** |
| * Resets converter to its initial state. |
| */ |
| public void reset() { |
| highHalfZoneCode = 0; |
| charState = G0; |
| charOff = byteOff = 0; |
| } |
| |
| /** |
| * Returns true if the given character can be converted to the |
| * target character encoding. |
| */ |
| public boolean canConvert(char ch) { |
| int index; |
| int theBytes; |
| |
| index = index1[((ch & mask1) >> shift)] + (ch & mask2); |
| if (index < 15000) |
| theBytes = (int)(index2.charAt(index)); |
| else |
| theBytes = (int)(index2a.charAt(index-15000)); |
| |
| if (theBytes != 0) |
| return (true); |
| |
| // only return true if input char was unicode null - all others are |
| // undefined |
| return( ch == '\u0000'); |
| } |
| |
| /** |
| * Character conversion |
| */ |
| |
| public int convert(char[] input, int inOff, int inEnd, |
| byte[] output, int outOff, int outEnd) |
| throws UnknownCharacterException, MalformedInputException, |
| ConversionBufferFullException |
| { |
| char inputChar; |
| int inputSize; |
| |
| charOff = inOff; |
| byteOff = outOff; |
| |
| while (charOff < inEnd) { |
| |
| if (highHalfZoneCode == 0) { |
| inputChar = input[charOff]; |
| inputSize = 1; |
| } else { |
| inputChar = highHalfZoneCode; |
| inputSize = 0; |
| highHalfZoneCode = 0; |
| } |
| |
| switch (charState) { |
| case G0: |
| |
| l = LBase; |
| v = VBase; |
| t = TBase; |
| |
| if ( isLeadingC(inputChar) ) { // Leading Consonant |
| l = inputChar; |
| charState = G1; |
| break; |
| } |
| |
| if ( isVowel(inputChar) ) { // Vowel |
| v = inputChar; |
| charState = G2; |
| break; |
| } |
| |
| if ( isTrailingC(inputChar) ) { // Trailing Consonant |
| t = inputChar; |
| charState = G3; |
| break; |
| } |
| |
| break; |
| |
| case G1: |
| if ( isLeadingC(inputChar) ) { // Leading Consonant |
| l = composeLL(l, inputChar); |
| break; |
| } |
| |
| if ( isVowel(inputChar) ) { // Vowel |
| v = inputChar; |
| charState = G2; |
| break; |
| } |
| |
| if ( isTrailingC(inputChar) ) { // Trailing Consonant |
| t = inputChar; |
| charState = G3; |
| break; |
| } |
| |
| unicodeToBuffer(composeHangul(), output, outEnd); |
| |
| charState = G0; |
| break; |
| |
| case G2: |
| if ( isLeadingC(inputChar) ) { // Leading Consonant |
| |
| unicodeToBuffer(composeHangul(), output, outEnd); |
| |
| l = inputChar; |
| v = VBase; |
| t = TBase; |
| charState = G1; |
| break; |
| } |
| |
| if ( isVowel(inputChar) ) { // Vowel |
| v = composeVV(l, inputChar); |
| charState = G2; |
| break; |
| } |
| |
| if ( isTrailingC(inputChar) ) { // Trailing Consonant |
| t = inputChar; |
| charState = G3; |
| break; |
| } |
| |
| unicodeToBuffer(composeHangul(), output, outEnd); |
| |
| charState = G0; |
| |
| break; |
| |
| case G3: |
| if ( isTrailingC(inputChar) ) { // Trailing Consonant |
| t = composeTT(t, inputChar); |
| charState = G3; |
| break; |
| } |
| |
| unicodeToBuffer(composeHangul(), output, outEnd); |
| |
| charState = G0; |
| |
| break; |
| } |
| |
| if (charState != G0) |
| charOff++; |
| else { |
| |
| // Is this a high surrogate? |
| if(inputChar >= '\ud800' && inputChar <= '\udbff') { |
| // Is this the last character of the input? |
| if (charOff + inputSize >= inEnd) { |
| highHalfZoneCode = inputChar; |
| charOff += inputSize; |
| break; |
| } |
| |
| // Is there a low surrogate following? |
| inputChar = input[charOff + inputSize]; |
| if (inputChar >= '\udc00' && inputChar <= '\udfff') { |
| // We have a valid surrogate pair. Too bad we don't do |
| // surrogates. Is substitution enabled? |
| if (subMode) { |
| if (subBytes.length == 1) { |
| outputByte[0] = 0x00; |
| outputByte[1] = subBytes[0]; |
| } else { |
| outputByte[0] = subBytes[0]; |
| outputByte[1] = subBytes[1]; |
| } |
| |
| bytesToBuffer(outputByte, output, outEnd); |
| inputSize++; |
| } else { |
| badInputLength = 2; |
| throw new UnknownCharacterException(); |
| } |
| } 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(); |
| } else { |
| unicodeToBuffer(inputChar, output, outEnd); |
| } |
| |
| charOff += inputSize; |
| |
| } |
| |
| } |
| |
| return byteOff - outOff; |
| |
| } |
| |
| private char composeHangul() { |
| int lIndex, vIndex, tIndex; |
| |
| lIndex = l - LBase; |
| vIndex = v - VBase; |
| tIndex = t - TBase; |
| |
| return (char)((lIndex * VCount + vIndex) * TCount + tIndex + SBase); |
| } |
| |
| private char composeLL(char l1, char l2) { |
| return l2; |
| } |
| |
| private char composeVV(char v1, char v2) { |
| return v2; |
| } |
| |
| private char composeTT(char t1, char t2) { |
| return t2; |
| } |
| |
| private boolean isLeadingC(char c) { |
| return (c >= LBase && c <= '\u1159'); |
| } |
| |
| private boolean isVowel(char c) { |
| return (c >= VBase && c <= '\u11a2'); |
| } |
| |
| private boolean isTrailingC(char c) { |
| return (c >= TBase && c <= '\u11f9'); |
| } |
| |
| /** |
| * returns the maximum number of bytes needed to convert a char |
| */ |
| public int getMaxBytesPerChar() { |
| return 2; |
| } |
| |
| |
| /** |
| * Return the character set ID |
| */ |
| public String getCharacterEncoding() { |
| return "Cp949"; |
| } |
| |
| /** |
| * private function to add the bytes to the output buffer |
| */ |
| private void bytesToBuffer(byte[] theBytes, byte[] output, int outEnd) |
| throws ConversionBufferFullException, |
| UnknownCharacterException { |
| |
| int spaceNeeded; |
| |
| // ensure sufficient space for the bytes(s) |
| |
| if (theBytes[0] == 0x00) |
| spaceNeeded = 1; |
| else |
| spaceNeeded = 2; |
| |
| if (byteOff + spaceNeeded > outEnd) |
| throw new ConversionBufferFullException(); |
| |
| // move the data into the buffer |
| |
| if (spaceNeeded == 1) |
| output[byteOff++] = theBytes[1]; |
| else { |
| output[byteOff++] = theBytes[0]; |
| output[byteOff++] = theBytes[1]; |
| } |
| |
| } |
| |
| /** |
| * private function to add a unicode character to the output buffer |
| */ |
| private void unicodeToBuffer(char unicode, byte[] output, int outEnd) |
| throws ConversionBufferFullException, |
| UnknownCharacterException { |
| |
| int index; |
| int theBytes; |
| |
| // first we convert the unicode to its byte representation |
| |
| index = index1[((unicode & mask1) >> shift)] + (unicode & mask2); |
| if (index < 15000) |
| theBytes = (int)(index2.charAt(index)); |
| else |
| theBytes = (int)(index2a.charAt(index-15000)); |
| outputByte[0] = (byte)((theBytes & 0x0000ff00)>>8); |
| outputByte[1] = (byte)(theBytes & 0x000000ff); |
| |
| // if the unicode was not mappable - look for the substitution bytes |
| |
| if (outputByte[0] == 0x00 && outputByte[1] == 0x00 |
| && unicode != '\u0000') { |
| if (subMode) { |
| if (subBytes.length == 1) { |
| outputByte[0] = 0x00; |
| outputByte[1] = subBytes[0]; |
| } else { |
| outputByte[0] = subBytes[0]; |
| outputByte[1] = subBytes[1]; |
| } |
| } else { |
| badInputLength = 1; |
| throw new UnknownCharacterException(); |
| } |
| } |
| |
| // now put the bytes in the buffer |
| |
| bytesToBuffer(outputByte, output, outEnd); |
| |
| } |
| } |